c)rrIoNEER'

ORDER NO.ARP-OO6-O

STEREO CASSETTE DECK

MODEL CT-X5O COMES IN FIVE VERSIONS DISTINGUISHED AS FOLLOWS:

o This service manual is applicable to the KU type. For servicing of the other types, please refer to theadditional service manual.

o Ce manuel d'instruction se refère au mode de réglage, en français.o Este manual de servicio trata del método de ajuste escrito en espafiol.

1 .2.3.4 .5.6.7 .

234

57

1 5" 1 7

8.9.10 .1 1 .12.

P.C.BOARDS CONNECTION D IAGRAM

SHEMATIC DIAGRAM

ELECTRICAL PARTS LIST

PACKING

ADJUSTMENT.REGLAGEADJUSTE

Type Voltago Remarks

KU 12OV only U.S.A model

r{E 22OY and 24OV (Switchablel Europe model

H B 22OY and 240V (Switchabte) U.K. model

D 12OV,22OV and 240V (Switchabtel General export model

D/G 1 2OV, 22OV and 24O (Switchablel U.S. mi l i tary model

CONTENTSSPECIFICATIONS

FRONT PANEL FACI LITIES .

DISASSEMBLY

PARTS LOCATION

CIRCUIT DESCRIPTIONS.BLOCK DIAGRAMEXPLODED VlEWS AND PARTS LIST

2 42 73 03 23 34 04 7

PfONEEFI ELECTFICINIC CC|FIPCIFIATIEIN 4-1. .v'esuro I -chome. Meeuno-ku. Tokyo j s3. JêpânU.a. F|CTNICF| ILICTF|CINICa CCIF|PCIFIAI|CIN BS Oxro.d D.rve. Moonêchre. New Jensev O7O74. US AFlGlNlll| CLCCTFICINIC (É9F|C!FE! N.\/. LurEhegen-Hêven g, 2OSO Ancwenp. E}etgrumFfClNl lF lLlCIFlClJ\ | lCa AUaTFALIA F1Y. L1Ct. 17A-1e4 Eloundê.v Ftoêd, BnBèsrcte. VrcEoFrâ 31S8. AusE.Êtrs

FZ O J ULY 1981 Pr in ted in Japan

5. CIRCUIT DESCRIPTIONSThe main circuit configuration is outlined in the

block diagram on page 15.

5.1 SIGNAL PATHRecording Mode

The input signal from LINE INPUT is passed viathe INPUT volume control, flat amplifier and MpXfilter before being applied to the Dolby NR circuit.

The Doly NR circuit output is then applied tothe recording amplifier equalizer where the fre-quency response is regulated according to the typeof tape being used before finally being appliedto the recording head.

Playback Mode

The playback head output signal is applied tothe playback equalizer (gain 5B.2dB) where thefrequency response is corrected according to thetype of tape being used. Following this, the signalis passed via the MPX filter to the Dolby NRcircuit, and then via the REC/PB switch (HA1200belechonic switch) and MUTE switch (HA12006electronic switch) to the LINE OUTPUT as theplayback output signal.

5 .2 CONTROL CIRCUITThe CT-X50 contuol circuit (outlined in Fig. 5-1)

features a logic IC (8A843) for control of mechani-cal drive by feather-touch switch operations. The84843 pin layout is shown in Fig. 5-1 and theinput/output::i^:"::

:,t:: t""1

"-

Fû Sî6F FF MÊrio ru PA,SE -REc

cNo

Fig. 5-1 Pin arrangement of 8A843

Power-Assist MechanismBefore describing circuit operations during each

operational mode, the basic principles of thepower-assist mechanism will be explained.

Gear return spring Flywheel assembly

Gear leverStopper

Fig. S-2 STOp mode

o Stop Mode1. The cam gear is positioned as shown in Fig. b-2.o Stop Mode to Play Mode (Figs. b-4, b-b, b-6)2. When solenoid P (pinch solenoid) is activatede,

the cam gear stopper is released O.3. The operating lever is then forced down

(direction @ ) bV the operating lever returnspring, and because of the shape of the cam,the cam gear starts to turn in direction @.

4. As the cam gear rotates in direction O . itengages the capstan gear @.

Lever spring

I npu t s i gna lOutput

Output modeU ' T F O . R E W O_RE C O-PAU SE O-PLA Y

S T O P L L L L L STOP modeF F H H FF mode

n L H L L REW mode

P L A Y L L L L H PLAY mode

PAUSE L L L L H L PAUSE mode

R E C / P L A Y L H L H REC/PLAY mode

BEC/P_A_USE L L H H L REC/PAUSE mode

Fig. 5-3 Input/output truth table

Gear return spring Play Mode to Stop Mode (Fig.5-7)7. lilhen switching to stop mode, solenoid P is

deactivated (in direction (D ) and the cam gearstopper released (D. The cam gear rotates tothe stopper position (@, O), and the operat-ing lever is lowered ( (D) bV the operating leverreturn spring, thereby restoring the mechanismto the original stop mode status.

1 Gear return springI C a m q

Flywheel assemblyCapstan

Leverspring

assemblySolenoid P o

Fig. 5-4 STOP + PLAY mode I

5. Once the cam gear engages the capstan gear,the motor and flywheel rotational momentumcontinue to drive the cam gear @ until thestopper reaches the PLAY position 0). lnthis position, the operating lever is pushed up

@due to the shape of the cam.6. At the same time, the operating lever shaft

is raised 0, thereby pushing the HB drivespring attached to the head base upwards toforce the head base into the PLAY position.And since the pinch pressure spring is alsoelevated, the pinch roller is pressed againstthe capstan for start of play.

Flywheel assembly

ICam gear

Gear lever

LeverSolenoid p assembly

Fig. 5-7 PLAY + STOP mode

Tape Transport Mode SwitchingPins 1, 2, 3 and 5 of IC402 (8A834) are the

input pins for PLAY, STOP, FF and REW. Whenany pin is switched to L level, the tape deckis switched to the conesponding transport mode.For example, when 52 and S3 are switched on,pins 1 and 2 of. IC404 are switched to L level,resulting in the OR gate output pin 3 also beingswitched to L level. This is followed by pin 1of.1C402 being switched to L level, thereby switch-ing the deck to play mode. Likewise, SB and 54are switched on for fast forward mode, 52 and Sbfor rewind mode, and 54 and 55 for stop mode.

I

; Gear return springI Cam gear

Solenoid P

Solenoid P

El

Gear lever

Fig. 5-5 STOP -' PLAY mode tl

return spring

Gear lever

Lever spring

Stooær Q

o

f 6 1 5 t 4 t 3 t 2 { t t o 9

tc4o2 8A843

1 2 3 4 5 6 7

Fig. 5-8 Tape transport mode switching

Fig. 5-G STOP-+ PLAY mode ll l

J---_1_UJ.--1/.-ftll

tl

5.3 MUTING CIRCUITMuting Gate

The LINE OUTPUT muting gate is incotporatedin IC401 (H412006), the output being mutedwhen pin 15 of this IC is at L level and pn 2 atH level.

Pin 15 is connected to the PLAY output of theoperating mode control IC (8A843) and is switch-ed to H level only during playback mode. +B isapplied to pin 2 vn R478 and, R477, and the pinis kept at H level except when Q426 is turned onduring recording mode. In this way, the line outputis muted during fast forward, rewind, stop andplay pause modes, and cancelled during playback,recording and recording pause modes.

Fig. 5-12 LINE OUTPUT mutins

The recording amplifier input muting gate isgloundconnected by transistors (Q103 and Q104).The bases of these hansistors are connected to pin2 of HA12006 via R145, R143, R428, D427,D429 and R477, thereby enabling muting to becancelled during recording mode. fhrring rec mutemode, however, these bansistors are turned on,resutling in the recording of blank sections of tape.

BEC AMP

D4æ D427

2.

3 .

r' :L

sroP 1-

vs --J*pg1y

lC4O2Pin 14

Pinch solenoid

Head base

MS solenoid

FF solenoid

1C403 Pin6

1C403 PinS

Fig. 5-10 MS operation timing chart

Auto-Stop CircuitThis circuit is used to switch the mechanical

drive conbol IC (BA843) to stop mode when tapetransport stops (see Fig. 5-11). A photo-intemrpteris used for tape transport detection, and the rotaryblade mechanism used to intemrpt the light beamis coupled to the take-up reel by belt.

During Tape Transport1. Q401 is turned on and off repeatedly by the

photointernrpter output, resulting in C403being charged up and discharged again in re-peated cycles.

When Tape Transport StopsWhen the take-up reel stops at the end of thetape, Q401 ceases switching on and off due tothe loss of the photo-intemrpter output.With a current being passed from +B to C4O3via R405 and R406, C403 is charged up andthe Q402 base potential increases, resultingin Q402 being turned off. Q403 is thus turnedon and pin 2 (STOP) of.tC402 is switched toL level, thereby switching the deck to stopmode.

I C 4 0 2 ( O - P L A Y ,( 4a843'

to( o - R E C )

c402

cr03

F405

i

\

i'iJ

+B (12V1

2( STOP '

I c{02

t4

{5

o{0r

t2

FiS. +t 1 Auto-stop circuit Fig. 5-13 REC AMP mut ing

aMuting at Start of ptayback Mode (Stop 1s p;6r_back Model)

When the tape deckmode from stop mode,mode control IC (BAg4ilevel, and pin 1 of IC4(temporarily to H level

.4 is fully charged up).cancellation of muting-at>de is dêtermined by tt u100ms) of C4}6connect-

is arso added due to ii3î;lil"Tâ1,r.îiï,ii,l#iConsequenfly, line outplî *rù;;l; cancelledapproximately 0.6sec

lfter swidilg t"o ptayuactc*:dg, thereby eliminating tt "

slro"t "nài*u g"rro"t_ed when the head nrakes "ir"t"J

*itrri[" ,"o".

5.4 RECORDTNG MUTING

\qf3IEC/PLA1

O-REC I O.PLAYl r l H

Muting at Start of Recording Mode (Stop to Re_cording Mode)C438 connected to pin g of HAL2006 is atiming capacitor used to regubtÀ trre lperationattiming of the head _switch (the rà"oraing signalshorting relay RyB01 connectea to-pin 6). Whenswitching to recording mode frorn-riop mode,

9jl8 i: charged up, anâ pin 6 switàhed from L ron revel once the capacitor has been charged up.ïVhile this C4Bg is--being

"fr*eàJ "p (approx.

200ms), the LINE OUTPU"T i, *-,itua. ôat is mut_ing is cancelled after a delay of abàut 200ms,thereby eliminating switching "tir".

---

F i s . 5 - 1 4

Fig. 5-15 Muting at start of recording

FiS. S-t0 Recording muting

This function is employed in preparing blanksections of unrecor.l-eà iupu ,"ffi"a for MS(automatic location .ot. stari'or t."""]]bi"" e e426Q427 arc both on durir

------l' I

99t-di"g amplifier input(41.03 and e104) areremrans unmuted. If Siswitched on, e10B and (passed via SB, D426.Q103 (Q104). The .u"o*attenuated, and tape harany signal being reco_rded. At the same time, +B i6lJro pur:g9 via SB, R480 and isorôz b e426,jf,i"glv let'ting up rhe REC Mu-T-E-i;icator lamp(LED507).

BEC AMP

lc 4Dt (HAI2OO6)

Muting at start of playback

4. PARTS LOCATION

Front Panel ViewKnob A (T lMER l

RAC-170

Eject knobRAC-164

NOTES:o Parts without part number cannot be supplied.o The ;i. marh found on some component parts indicates the importance of the

safety factor of the part, Therefore, when replacing, be sure to use parts of identicaldesignation,

o For your Parts Stoch Control, the fast mouing items are indicated with themarks ** and t** GENERALLY MOVES FASTER THAN *This classification shall be adjusted by each distributor because it depends on modelnumber, temperature, humidity, e tc.

BonnetRNA-549

B ( R E C }RAC-21 5

f

I

)

nct ion knobRAC-2|3

Knob D (DOLBY NR)RAC-l68

C (REC MUTE)RAC-216

Knob A (PAUSE)RAC-214

t t Push switchRSGO88

Function switch assembly

* * Push switchRSG- I 14

* * Pinch arm assemblyR8H-760

l \ Strain ret iefREC-272

A CoroRDG.O22(BDGO30)

* t Door assemblyRX8.594

Power knobRAC-163

Knob C (MUSIC SEARCH)RAC-172

Knob B (REC/PLAY)RAC-171

Front View with Front Panel Removed

CounterRAW.159

Cassette plate assemblyRXX-325

* Erase headRPB-085

* * REC/PB headRPBO84

Rear Panel View

Term ina l ( L INE)

R KB-o18

* Variable resistorRCV-093

Pin jack

RKN071

5

Top View with Bonnet Remoræd I

I * Motor assemblyRXM-076

Top View with Bonnet Removed ll

Connector assembly 4PBKP.356

Connector assembly 2P

[ * Powertransformer (120V1RTT-238

* * Capstan beltREB41 . I

Flywheel assemblyRX8-358

r

Mother assembly

connector assembly 3PRKP.269

Connector assembly 3PRKP.27O

trol assembly

Fort sencer assembly

I

{

Timer switch assembly

When the Pornær is Switched on (See Fig. 5-91When the power is switched on, +B is passed via

C4O4 and R415 to Q40G, being turned on forabout 1.5 to 2.5 seconds (until C404 is fully charg-ed). This results in pin 2 (STOP) of IC402 beingswitched to L level, thereby ensuring that the deckis orginally in stop mode. If any other switch ispressed during this initial brief period, the deckwill remain in stop mode. +B will, however, beapplied to the capstan motor and the motor willstart up.

Playback ModeWhen the PLAY switch (S2/SB) is pressed, pin 1

(PIÂY) of. tC4O2 is switched to L level and pin 12(O-PLAY) to H level. +82 is thereby passed viaF"423 and R424 to Q410, rezulting in this transist-or being tumed on. The pinch solenoid SOL isconsequently activated and playback mode com_menced (see Power.Assist Mechanism).

Recording Mode1. Iilhen a cassette half with the erasure preven-

tion tabs intact is loaded into the deck (result-ing in the erasure prevention switch S10 beingswitched to the NO HOLE position) and SZswitched on, pin 10 (O-REC) and pin 12(0-PLAY) of.IC4O2 switched to H level.

2. The pin 10 output is applied to the base ofQ426 vira R481. With e426 turned on, pin 2(REC signal input) of. IC4OI is switched to Llevel. And since pin 12 is at H level, pin 1b(PLAY signal input) of IC401 is switched toH level resulting in pin 6 (head switch) and pin16 (recording/playback switch) of IC401 alsobeing switched to H level. The recording inputshorting relay RY301 in the record/playbackhead circuit is opened and the playback outputshorting transistor Q101 is tumed on (therebyswitching the head to recording mode).

3. With'pin 10 of IC4O2 and the playback outputshorting transistor Q301 is turned on and thebias oscillator activated.If a cassette half without the erasure preven_tion tabs is loaded, S10 is switched to theHOLE position, resulting in pin g (À-R) ofIC4O2 being switched to L level. In this state,the tape deck will not be switched to recordingmode when pin Z (EE-C) is switched to L level.

Fast Forward ModeWhen the FF switch (Sg/S4) is pressed, pin 1b

(0-FF) of. 1C402 is switched to H level, reiultingin +32 being passed, to e40T via R4LT and R41g.And once Q407 is tumed on, the FF solenoidis activated to start fast forward mode.

Rewind ModeWhen the REIV switch (S2lSb) is pressed, pin

13 (O-REW\ of.lC4O2 is switched to H level, result-ing in +82 being passed to Q408 via R420 andR42L, thereby turning Q408 on to activate theREW solenoid for start of rewind mode.

Time Playback ModeTape playbaek is started automatically at the

time set by the timer.1. I{hen the power is switched on with the

TIMER switch S11 on and S12 set to play, +Bis immediately passed to Q411 via C406 andÈ426, thereby tuming Q411 on for about B to5 seconds (until C406 is fully charged). Inaddition, +B is applied to Q406 via C404 andR415, resulting in Q406 being turned on forabout 1.5 to 2 seconds (until C404 is fullycharged). As a rezult, pin 1 (Pf,Ây) and pin 2(STOP) of.IC OZ are switched to L ievel.

-

2. lflhile pin 2 remains at L level, stop mode haspriority over all other modes, and pin 12(O-PLAY) of. 1C402 is switched to L level.

REC/PB head

ry o!0.+B3

oscBLOCK

3. Q406 is turned off once C404 has been fullycharged up, resulting in pin 2 of.l0402 bengswitched to H level (L + H). Since Q411 ison at this time, pin 1 of ICAOZ will be at Llevel, and pn 72 will be swiôched to H level(L - H). Q410 will thereby be turned on,and the pinch solenoid SOL activated as des-cribed above for playback mode.

Timer Recording ModeThe tape deck is started up automatically in

recording mode at the time set by the timer.1. \[hen the power is switched on with the

TIMER switch S11 on and S12 set to REC,Q406 and Q411 are turned on for severalseconds in ttre same $'ay as described abovefor timer playback mode. As a result, pin 1(PLÂY), pn 2 (SIO=P) and pin ? (EE-C) ofIC402 are all switched to L level.

2. During tlre period that pin 2 of. IC4O2 is atL level, pin 10 (0-REC) and pin 12 (O-PLAY)of the same IC are also at L level.

3. Once C404 is fully charged, Q406 is turnedoff, resulting in pin 2 of.lC4O2 being switched

to H level (L + H). And since pins 1 and ? ofIQ402 are at L level at this time pins 10 and 12are switched to H level (L + H), therebyresulting in the start of recording mode (seenormal recording mode for further details.

MS Operation\{hen the MS switch is turned on and either the

FF or REW switch pressed during tape play, thetape will be stopped at an unrecorded blanksection of tape between tunes, and then switchautomatically to playback mode.1. \{hen the FF switch (S3/S4) is pressed vdth

the MS switch S13 tumed on, pin lb (O-OFF)of IC4O2 is switched to H level, therebyenabling Q407 to be turned on (fast forwardstandby mode) by the Q419 inhibition circuitdescribed later.At the same time that pin 15 is switched toH level, pin 14 (0-FAST) is also switched to Hlevel, rezulting in Q417 being turned on.Once Q417 is tumed on, Q418 and Q419 willbe tumed on for a period of time determinedby the C425|P"44O time constant. And whilethe Q419 inhibition circuit is on, the e40Zbase potential drops, resulting in the transistorbeing turned off to put the deck into fastforward standby mode.Pinch solenoid SOL. 1 is activated by thecunent passed from Q418 to Q410 via R445and D413 (one-kick power-assist start), result-ing in the head base being raised.Also as a result of Q417 being turned on,Q421 is turned on by q420 after a delaydetermined by the C4261R"446 time constant,thereby activating the MS solenoid SOL.Upon completion of power-assist, the headbase is move to the MS position, the fast for-ward standby mode is cancelled, and tapetransport proceeds in fast forward mode.And since pin 6 of IC403 is switched to Hlevel, IC403 is switched to MS standby mode.During this fast forward tape transport, pin 3(input terminal) of IC403 (for inter-turn blankdetection) accepts the fast forward playbacksignal (flat amplifier output signal).If this input signal is intenupted for about84ms, a pulse is obtained from pin 8 (outputterminal), the width of the pulse beingdetermined by R431 and, C423. Q4L4 is tumedon by this pulse signal, resulting in pin 1(PLAY) of. îC4O2 being switched to L level,and the tape deck being switched to playbackmode.A similar sequence is also followed when theRElfl switch is pressed instead of the FFswitch.

I

I2 .

3 .

4.

5 .

I

6 .

7 .

8.

9 .

1 0

5.5 FUNCTION SELECTORïVhen ttre CT-X50 is used with the A-X30 or

A-X50, this function selector circuit passes signalsto the A-X30 or A-X50 indicating the tape deckoperational status.

IC405 (M51202L) receives output signals viadiodes D409, D408 and D432 from different1C402 (8A843) output pins during different opera-tional modes. During playback, fast forward andrewind modes, pin 1 of IC405 is at a higher po-tential than pin 2, resulting in pin 3 being switchedto L level. If t'Lre deck is then switched to record-ing mode, the D432 cathode is switched to H leveland the D409 and D408 cathodes are switched toL level. with the D432 cathode at H level, pin 2 ofIC405 is switihed to a higher potential than pin 1,resulting in pin 3 being switched to H level. Pin 3is also switched to H level during stop mode dueto +B being applied to pin 2. C443 and C442have been inserted in order to prevent misopera-tion during mode switching (use is made of thetime constants of these capacitors during each typeof mode switching).

5 .7 T IMING CHART

MS MODE

O- PLAY

O-FAST

O-REC

+ B

Fig. 5-1 7 Function selector

5.6 AUTO TAPE SELECTORTape selection of normal, chrome and metal

tapes in the CT-X50 is performed automaticallyby detecting special detector holes in the respec-tive cassette halves. The presence/absence of theseholes is detected mechanically by S14 and S15.Depending on the rezultant switch combination,the required supply voltage is applied to theoscillator circuit in order to obtain the appro-priate bias level for each type of type.

STOP MS MODE PLAY

FAST SIGNALlC 8A843 Pin14

PINCHSOLENOID

HEAD BASE

MS SOLENOID JF F S O L E N O I D

REW SOLENOID

MS MUTINGlC 8A336 Pin 6

MS PLAY PULSlC 8A336 Pin 8

NORMAL OPERATION

CHANGE

POWE RON P L A Y STOP

F F o rR E W STOP

Kèç,/

P A U S EREC,/

P L A Y STOPREC./

P L A Y STOP POWERO F F

J(J

PINCHSOLENOID

ON

I FoFF

=t-1caI>OCî.JJ

TAPETRANSPORT J J J

IELtJtt-J-

LINE OUTMUTING _,r-I I IREC AMPMUTING -.,r I IPOWER SWON/OFFMUTING

_,rlBIASOSCILLATOR J \ / \

*- . ,Ë

sg9POWER SWON/OFFMUTING

_,rlFUNCTIONSELECTOR J

FF o r REW P L A YREC./

P L A YF F o r

R E W7EC,/

P L A Y

J

O >zy.t*6âà

) I N C H

}OLENOIE

TAPETRANS-PORT J

(rlutr=

L I N E O U TMUTING I I t_REC AMPMUTING

BIASOSCILLATOR l l

AUTO START AUTO STOP

P L A YJ T A N D B Y

i( È.uSTAND P L A Y REC/

P L A YF F o r

REW

J

at f< F1 . U( J >u J v

] I N C H

SOLENOIE î_l- î_I-r

TAPETRANS-PORT _f J L L tï

uJ

EJ

LINE OUTMUTING Jl _r-IREC AMPMUTING J- 11 _f

BIASOSCILLATOR iJ

o7. EXPLODED VIEWS AND PARTS LIST7.1 EXTERIOR

t4

t5

aI

iI

I

A

B

o-I

(EC

t3

@D

32

@

{

25

4

o. 1

lt' II

l az

Il i

\

(D

M

ff"q'-''

I

( i . BLOCK DIAGRAM

REC/PB HEAD

L rx€rLPuT

EO AMP

i'ïI

E H E A D

L C h

R c h

MS CIRCUIT

S I : P O W E R5 2 , 3 : P L A Y5 2 , 5 : R E W5 3 , 4 : F F

O N _ O F F

O N _ O F FO N _ O F F

O N - O F F

5 4 , 5 : S T O P5 6 : P A U S E) / n c u

5 8 : R E C M U T E

O N - O F F

O N - O F F

O N _ O F F

O N - O F F

AUTO STOP

S I O : E

S I I : T

S I 2 : T

t L t u z

D O L B Y N R

O R E C

F

É:

M U T IS W iâ--

!1,13.1.;

osc

I-POWER SUPPLY-r

+83+82

+ B l

AC 120v5O/60H2

AUTO FUNCTION CIRCUIT0.o9 Ra37 R493

C1.2

SOLENOID DRIVE CIRCUIT

MOTOR

N BP R E V E N T

O N - O F F

HOLE_NO HOLE

O N - O F F

P L A Y - R E C

S t 3 : M S O N - o F F

S l 4 : T A P E S E L E C T O R N O B M - C r O '

S t 5 : T A P E S E L E C T O B C r O " - M E T A L

ALC CIRCUIT

MUTING

I C 4 0 l

1 6 t 5 t 4 t 3 t 2 i l t o 9I C 4 0 2 8 A 8 4 3

O R

1 E

Part List

Mark No. Part No.

NOîESro Parts without part number cannot be supplied,o The ! marh found on some cornponent parts indicates the importance of the

safety factor of the part. Therefore, when replacing, be sure to use parts of identicaldesignation.

c For your Parts Stoch Control, the fast mouing items are indicated with themarhs ** and *** GENERALLY MOVES FASTER THAN *This classification shall be adjusted by each distrtbutor because it depends on modelnumber, temperature, humidity, e tc.

Description No. Part No, Description

* t

i *

* *

* *

* ** f

1. RNA-5492. RXB-5943. RAW-ls94. REB4445.

GP4i 1B

RBH€34RNHO27

11. RAC- I6412. RX8-50313. RAC-16314. RBH83115. RBH835

BonnetDoor assemblyCounterCounter beltPhoto sensor assembly

Sensing holderPhoto interruptorSensor P.C.B.Eject springEject plate

Eject knobFront panel assemblyPower knobKnob spr ing APlate spring

lndicator lense

Knob AKnob BKnob CKnob D

Knob spr ing BFunct ion knobMechanism assemblyCapacitorCapacitor cover

Power switchTimer switch assemblyPush switchTimer swi tch P.C.B.

Select knob A

Select knob B

S€lect knob CPanel stay

Function switch ass€mblY

LED holder A

LED holder BL E DL E DPush switchPush switch

RTT.238

RDGO22(RDGO3oI

REC-272REC-355REC-369

RNL.223

RKP.269

RKNO7lRKBO18Rcvo93

vcz30P060FMcPMZ3OPOSOFMCRBFO56BMZ3OPO6OFMCvcz30Po80FMC

PMZ3OPOSOFMCvBZ40PO60FMCvcz30P060FzKVBZ3OPOSOFZKRKP.27O

71 . R KP-356

Power transformer (1 20VlNu tMain chassisTerminal (GNDI

Power cord

Strain relief

Slide stopperFoot assemblyRear panel

H inç

Mother assemblyConnector assembly 2P

Connector assembly 3P

Control assemblyHeat sink

JackTerminal (LINE)

Valiable resistor 20k-ASide frameBottom plate

ScrewScrewWasher

ScrewScrew

ScrewScrewScrewScrewConnector assembly 3P

Connector assemblY 4P

* 41 .42.43.44.45.

6 .7 .8 .L

10.

46.47.48.49.50.

5 1 .52.53.54.55.

56.57 .58.59.60.

6 1 .62.63.64 .65.

66.67 .68.69.70.

1 6 .1 7 .1 8 .1 9 .20.

RAC-214RAC-215RAC-216RAC-l68

21. R BH-83222. RAC-21323.24. RCG-00625. REC-247

RSA-046

RSG-1 15

RCA-1 70

RAC- l71RCA-172

RNL.228

RNL-229GL-9PG4GL-9PR4RSG-1 14RSG-088

26.27.28.29.30.

3 1 .32.33.34.35.

36.37.38.39.40.

7.2 MECHANISM ASSEMBLY

Part ListMalk No. Part No.

IDoscription Mark No. Part No. Description

t .2 .3.4.5.

3 1 .32. RBI{€1933.34. RXB-35935, RBH€65

36.37.38.39. RBH-79440. RPBO85

Lock leverLock lever springSide arm L assemblyEject springLever switch

Side board L assemblyÇylinderO ringPistonConnection rod

Earth springPocket spring LPocket L assemblyBushPocket L

Guide rollerCassette plate assemblyCassette plateL€mp

Pocket frameDoor assemblyPlançr solenoid PREC prevent leverChassis assembly

Half springReturn spl ingHalf holderCounter beltSpacer

Cr02 deteclor leverCr02 detector springHead base

HB return spring

BT feltShaft stopperMS plateHB drive springErase head

41.* * 42 .

43.* * 44 .

45.

46.47. RBr{€1848. RNLO4g49. RNLO58

* 50. RXP-101

5 1 .52. RNLO4753. RBH-727

* 54. RXP-10055. RBH-722

e 56. RNLOS157.58. REB44659. RXB-37660. RBH.758

61. RBH-72462. RBH-72563. RXB-37464. RXB-37865.

* 66. REB-18767. RNK-998

** 68. RXB-37769. RNK-999

r* 70. RXB-360

a 71 . RNLo5972. RXB-il173. RBH-74474. RXMO7675.

76.77.78.79. RX8-358

r* 80 . REB41 1

81. RBH-72182. RXPOgg83. REB-24184.85.

Sub head baseREC/PB headHead adjust springPinch arm assemblyPinch pressure spring

METAL detector leverMETAL detect springPocket RPocket spring RPlunçr solenoid R

Solenoid bracketSolenoid armBrake springPlunçr solenoid FGear return spring

Gear leverSolenoid bracket RDrive beltDrive arm full assemblyFF spring

ldler pressure springFR springldler arm assemblyReel base assemblyBrake plate

Brake shoeldler gearSupply reel base assemblyTU idlerTU reel base assembly

Cam gearLever assemblyLever springMotor assemblyMotor

Motor pulleyFlywheel holderThrust receptacleFlywheel assemblyCapstan belt

Flywheel springMS solenoidDoor stopperSide plate R assemblyConnection plate

RBH€20

RBH€21RSN-027(RSNO10)(RSN.o32)

RXP.594RX8.594RXPO92

RNF€95RBH-778RNLO42REB444RNHO3l

RNLOsORPBO84RBH.723RX8-495RBH.760i *

21.** 22.

A * 2 3 .24.25.

26.27.28.

*r 29.30.

6.7. RNK-9958. REB447L RNL{53

10. RBHAz2

11. RBH-79512. RNL-O5713. RXB40514.1 5 .

16. RNK-99417. RXX-3251 8 .19. RELO8420. RNL-383

,4\

IA

I

I

I

20

r05

52

54

5

III

)

-a' l95

o

a

(

I718

l c 4 o 2 I C 4 O I

Q426 Q420

I

C O N T R O L A s s ' Y

A

e e l c o t ,

i j ; i Î : ' , l l$ * ; | , 1 : ' I r47ot?s

6 .ô ,

o b o- t.o ' l

f ; ' ; ' l i .

oTP.4'";

;',*fl , ' *__1..

,'T'"jJ*" ozZK

,I,,.+,{ \*,, T ooo''t,

J , f :r, ,X"'.1:j ,;': J:':'.':i I ."' : ' 'ti i'i'"*li - l;1,îË?-;ii.. '-;

. iù - ù4

R4zB D419-1 x 1 5 2 4 : + ".,"J 'Y ,..,.; ;1,"ï;Â;l +'ô'

I l oqtto ':1". ô Q4?? -425' / S L r 7 4 O L N - R o r S B

,ffi'."rjtj'jffii'îi'îhkE-iî.'pi-ifîç-[

I , T lool loL ' f ls o eczz-qzs 'ô s t - -=+ 1 é)Lr /av-nr

Daz6 )+?7 1

lY li?r -,.a 4 t 7 L a ^

R q r o 4 . / f . ^ ? q*+ç+ | 406 /r I

9 . F

10'3

! t pi2 r,'c

D,,r o - 'ler l' ' ii J'i.Xl*,*f L'* " tC .<

I o qRa+r ôr o /u 6. (agtf

D4.6 --

J- -

rl to" on,,i Lt

^ '.1 æ '$ffi1r '" 47/ta"- : ï - - r l - ) r qT + l11 /T_ f " " i r ro o o L l o o o o o o o ï " " " - À " A r l l + ' 1 1 Â ' j i f 1 É - r

C

D

IB7

Mark No. Part No. Description No. Part No. Description

86.** 87. RSHOsg

88.89.90.

91 .92. RLB-39093. YE3OFUC94. PMZ20P080FMC95. VCZ20P060FMC

96. VCZ26P090FMC97. ATZ26PO60FZC98. PMZ26P030FMC99. YE4OFUC100. Pcz26PO60FMC

{b

Detect assembly

Slide switchMount ing plate

Side arm R assemblyElect lever

Stopper leverStopperWasherScrewScrew

ScrewScrewScrewWasherSCREW

101. PMZ2OP13OFMC Screw1O2. IMZ2OY12OFMC Screw103. PMZ2OPI2OFMC Screw104. YE2OFUC Washer105. PMZ26P060FMC Screw

106. YS2OFBT Washer1O7. WAl7D032D025 Washer108. PMA26P040FMC Screw109. WA21D040D025 Washer110. RBF-051 Wahser

111. RBF-050 Oi l s topwasher112. PMA026P040FMC Screw

I)

1

External Appearance of Transistors and lCs

I FESISTOaSIrd{& in {1, {[ :5* rùæ. unb olb.Bb æid I i ro,

u : M r l ( F l : ! t % { G l : ' U { K ) : ' r @ . , ( M : æ % r o l . r . @

2 CAPACITOFSIldidd 'n c*ny llFllvoh4 tv) u.ldorh.ùiÉ6td p: pF

ldrc.rio sir@i voh4 is ry dcæt .lærrolYtÈ cæætor

3 VOI'AG€

ll Dc @hç (vl .r ho inNr ifd

4 OTH€BS]

A :Mjùn iqÈ in lthe

 d* tdd on m mFffir Èni idd6 6e ih.@n.h ol rh shy læro. ot rh.Fn. lbator.. tu r@tæiq,Erru bu4 Fftol &nrÈ.|tuiFnbn

25A826LN2SC1740LN

HAl200584843

I

-5 STTCHES:

S ' ] PMR52,5 : ÈAYæ t 5 1 E Ws3r4: F9 .5 : sToP56 : PNSE57 : REC$ ; F€C ilUE5 9 i r u Y N R

oN - 9Efd - t r FO - O F Fo -otrO N . 9 E

ON - OFFSlO : EN æWNÎEEM HglE - NO ff5 I I : T IMER ON - GFSI2 : TIMER PUY - æCs l 3 i M s fr -otr

NOTE:Playback signal routeRecording signal route ---

25A11272SC2634

HO?432

2SC2060

Typc No

84336

25D837 HA1t226HAl2006

Lot No

2SD103t M51202L

Type No

NOTE:The indicated semiconductora are repreæntative onesonly. Other alternatiue semiconductons may be used andare listed. in the parts list.

Sl4 I TAÆ SEECTæ tw-C.O2SI5 : TÆE SEÉCIG C.O? -MfrAL

ft. udêilid 'did6 rh.*ùcô Fibn

Thi! ir thé bÉ Sd.rÈ diq.ù, tur rhe ætu.t ci@n hry v.rydu. to 'dFrNdrs in ù'9

E

I7

B ld r

Mark Part No. Symbol & Description SWITCHMark Part No.* wz-135

* BZ-O50

t s2vc10F* 152473

OTHERS

Mark Part No.

zvo2zuol

D,410,D4110418

SymM & Decription

Symbol & Deccription

** RSGO88t* RSG- I 14

Tirner Switch AsæmblySWITCHMark Part No.

s2-S8s9

Symbol & Description

RKB.OI8RKN{71

Function Switch AssemblY

Terminal (l NPUT/OUTPUTIPinjack

Symbol & Deccription

*rt RSG-I 15

Photo Senser Assembly

Mark Part No.

sl 1-sl 3

Symbol & DæcriptionRESISTOR

Mark Part No.* * G P 4 1 1 B

RDî/4PM 1O2J

Detect AssemblyMark Part No.

R601

Symbol & Description

A RDl/2PSF 561J

SEMICONDUCTORS

Mark Part No.

R501-R504

Symbol & Description* r RsH-059

R KP-356Slide switchConnector assembly 4P

11. PACKINGMark No. Part No,

* GL.gPG4r GL.gPR4

LEDsOl-LED5O5LED5O6,LED5O7

Description

1. RHG4262. RHA-2333. RHX-0324. RDEO525. RRB-145

Packing casePad

Sheet DConnection cord assemblyOperating instructions

I 2 IDIAGRAM

3

A

8. P.C. BOARDSCONNECTION

1c201 Q202 lc1 Q l 0 r r c 1 0 1

B

M O T H E R A s s ' y

Q 2 o 4 Q 1 o 3 o 1 o 4 Q 2 o 3Q207 Q206 Q205

V R 1 O 2 V R 2 O 2 L 2 0 3 L l 0 3 L l O 2 L 2 O 2 V R J O 3 V R

C

Q r o 2Q1 07

a r 0 5v R 3 0 t v R t o l

D

321

tT

1

, lJl l

t l l li i l ,

î6S 3ç V R z a{ t 5 " r x

""tt

J Ti,'l:

Cztsi 0 0 P :

v RzcaI50K 8

VRrû3t50K-B

19. SCHEMATIC DIAGRAM

32

I MOTÆR A3S''

--J

A

-

ËH-.

B

c

D o4q,9,462S!74N-R or S d2SC26tr^ Ror S

321

apr,2û2SlÉot-Ror S dææg-R orsS W T C B r c ( R E C . O N )

rc lo r ,æl HAl2æ5RÊC/PB SYSEM C

d 2sc26g-Rorss w r c a r i l G { R E C ' O N )

COtfrROL Ass'y

rc40tHAr2@6MUTING B SWITCH]rc

M22\4252SCl74OLN- R 6S

t-I

II

L-25ÂæU-orR or2$l lz- R d S

654

oroj ,zotlX34A or lX@ or OÂ9O

o4t2,414 ,415ts2473

a

LEO5Oia 5O5oL-9re4

I LEffi,æ7

L:ii_

o 4 t 6 , 4 r 7 , 4 5 1lK34A or lK@A o. OA9O

Q42e?SCl74OLN -R o . s dzscæs-RdS

654

æ3- iO7, æ3 ! 2O72SCI74OLN-R ù S d2Sc2634-R or S

ar03,r@,2o3,2o4Swl rcHl rc (P B -ON)

o!05,26

OUTPUT I

l ;.u ) | R45o-'

I o4oz,4oa,41o| 2sc2m-odR

- - -------J O4O9 O4ilQ4O9 O4il2SCi74OLN-RorS 6 zæ?ru-RdS d2SC26Y-RôrS 2SC2634-RdSa - j - , r r r ! J T r , : M -

t-." ÀÉ.:

2SCt74OLN-RorS d2ææ34- R dS

Part No. Symbol & Description SWITCH

Mark Part No.* wz-135* BZO50

r s2vc10F* 152473

OTHERS

Mark Part No.

zvo2zvol

D410,D411D418

Symbol & Description

Symbol & Dercription

** RSGO88** RSG- I 14

Timer Switch AssemblyswtTcHMark Part No.

s2-s8s9

SYmbol & Description

RKBO18RKNOTI

Function Switch AssemblYRESISTOR

Mark Part No.

Terminal (INPUT/OUTPUT)Pinjack

Symbol & Description

* * R S G . I 1 5

Photo Senser Assembly

Mark Pan No.

sl 1-S1 3

Symbol & Dccription

l!\ RDl /2PSF 561J

SEMICONDUCTORS

ll/lark Part No.

R501-R504

Symbol & Description

* * G P 4 1 1 BRDl/4PM 1O2J

Detect AssemblyMark Part No.

R601

S]'mbol & Dercription

11. PACKINGNo. Part No.

r GL.gPG4t GL.gPR4

LEDsOl-LED5O5LED5O6,LED5O7

Doscription

** RSHOsgRKP.356

Slide switchConnector assembly 4P

1 .2.

RHG426BHA.233

3. RHXO324. RDEO525. RRB-l45

Packing casePad

Sheet DConnection cord assemblyOperating instructions

I nEs ts l0Rs:ldbrd in A ZW !5S tol.ræ u.l6 olh.Mi* mrd k t9,

M : Mo, lF l ' l% lc l I ' 2$ {x , i rO. , t , !æ% rorÙ.æe

2 CAPACIIOFSlldÉùd h csiiY {!Fl/d(ç (Vt ùd6ot@U mtd o I gF

rdtdion whh@t rcnç i3 æv.!c@t êlærolYtb c+æior

3 VOLIAG€

E : æ É t ç l v ) . t É i F r t i F l

. O 'HEÂS:

A : eiuli4 æinrrh. /h m..r l@d d m mæ6r Ènr dt6 th. 'm

FilEa ol ft eey læto. ol rtu M. Tkçl@,ùrdæiq,h ræ burFnso l ûn tÈ. lddgn i l 'on

2SA826LN2SC1740LN

HAl200584843

-5 STTCHES

5I : PMR52,3 : P l^Y

52,5 reW

ON - OFFo -trFs - o fd -gEE

9,5: sloP oN - gfE

56 : PAUSE57 : FEC

$ . REC MUE

oN- f f i

O N - 6 F59 : OCBY NR q -gqEsro EN æwNrmcu HglE - @.!9!Esfi T|MER ON - 9fE5i2 : TIMER PLAY _.æqs r 3 : M S oN -otr

NOTE:Playbach signal route

-_-Recording signal routeSl4 rff i SEÉCTG W-C.O2

Sl5 : IPE SEÉCTæ ç!93 - GTAL

lhuùlid idic.G rhe *i ld æ.iton

Thk is th. bb æh6.i. diqrh br r6a æùd ci@n Êv v.ry

dù. ro inÈdmnc in 6iS.

I7

25A11272SC2634

HD7432

L o t N o

zSC2(b0

Typ. No

8A336

25D837 H411226HAt2006

2SD1031 M512o2L

lype No

NOTE:The indicated semiconductorc are repreæntatiue onesonly. Other alternative semiconductora may be used andare listed in the parts list.

L J

-

1O. ELECTRICAL PARTS LISTNOlES:o When ordertng resistorc, first convert resistance wlues into code form æ shown in

the following examples.Ex. 1 When there are 2 effectiue digits (any d.igit apart from 0), such æ 560 ohm

and 47h ohm (tolerance is shown by J=5%, and K=10% ).560f) 56 x 1014 7 h a 4 7 x 1 0 3

5 6 1 . . . . . R D % P S E B E J473. . . .. RD%PS EAPIB J

o . s a 0 R 5 . . . . . . n N 2 r l [ Ù E B Kr o 0 1 0 . . . . . . R S I P @ n @ K

Ex. 2 When there are 3 effectiue digits (such æ in high precision metal filmresistorc).5.62ko 562 x 10 ' 5621 . . . . RN'/SR EltrEE r

o The I marh found on some component parts indicates the importance of the

safeti factor of the part. Therefore, when replacing, be sure to use parts of

ide ntical designation,o For your Parts Stoch controt, the fast mouing items are indicated with the

marhs ** and *** GENERALLY MOVES FASTER THAN *

This ctasification shall be adiusted by each distributor becarse it depends on

model number, temperature, humidity, etc'

Misccllaneous Parts LastP.C.BOARD ASSEMBLIES

Mother AssemblyCAPACITORS

Mark Part No. Symbol & DescriptionMark Part No. Symbol & DescriPtion

OTHERS

Mark Part No.

Mother assembly

Control assemblYFunction switch assemblYTimer switch assemblYPhoto sensor assembly

Detect assemblY

Symbol & Description

CKDYB '01 K 50CEANL 33OM 16CEANL 22OM 16CEA ORlOM 50CEA OR33M 50

CEA OR47M 50cEA 010M 50CEA 3R3M 50cEA 221M 10cEA 100M 16

cEA 470M 16c E A 1 0 1 M 1 6c E A 4 7 1 M 1 6coMA 472K 50coMA 1 53K 50

coMA 333J 50

coMA 473J 50C K D H Y F 1 O 2 Z 5 0

ccDsL 101 K 500

cl01,c201c102,c202c103,c203c123,C125,C223,C225c117 ,C126,C217 ,C226

c127,C227c310c309c307c l05 , c l 07 , c l 08 , C l11 , C l13 -c115, C120-C122, C124, C12A,c129, C130. C205, C207, c208,c211. C213-c2J5, C220, c221,c222, C224, C228-C230, C302.c305. c306.

c308c302,c303c304cl 18,C218cl 16,C1 19,C216,C219

c106, c112, C131, C132, C206,c212,C231 ,C232c1 33,C233c104, cl09, cl10, c204, c209,c210c1 35,C235

i \ *A * *A

A

RTT.238R5A046RDG.O22{RDG{301REC-272

Power transformer (1 2OVlPower switchPower cord

Strain r l ie f

LampPlunger solenoid P

Plunger solenoid F

Plunger solenoid RREC/PB head

Erase head

AAL

BELO84* RXP-092* RXP-100r RXP-101

rr RPBO84

* RPBO8s

Mark Part No. Symbol & OescriPtion

RESISTORS

NOTE:When ordering resistors' conuert -the resistance ualue

into cod.e fo"*,'iii tn"i rewite the part no' as before'

Symbol & DescriPtion

cEA 330M 16

cEA 470M 16cEA221M 16cEA 102M 16cEA222r/l 16

cEA 471M 25

cÊA22'tM25coMA 102J 50

coMA 103J 50

coMA 104J 50

CKDYF 1032 50

C K D H Y F 1 O 2 Z 5 0CKDHYF 1 O3Z 50

CKDYF 473250

RCG-007

cr'.20c402,c4a3,C444c412,c437c439c416

c415c413c424c418,c/.21c422

c445c409c411c435

Part No.

SEMICONDUCTORS

t R c P l 1 5(RCP-2001

* RcP-150(RCP-195)

* BcP-149(RCP-193)RSl PF 56OJRD1 /4PM OOÛJ

VR103,VR2O3 Semi-f ixed 150k-B

VRlOl ,VR2O1 Semi-f ixed 22k'B

VR102,VFl202 Semi-tixed 10K-B

VR3Ol8304R101-Rl37 , R139-R145, R201-

R237, R239-R245, R301-R303'

R3o5-R307, Ft309, R310

Symbol & Description

rc101,1C2011c l02

01 o 1 -o1 07,0201 -a207'0301

Dl01 ,D201

D102,D202,D301-D306

2D30120302

c408 Capacitor array

Mark Part No.

* r HA12005** HA11226

RESISTORS

NOTE:When ordering resistors' cont)ert -the resistance value

into code fo'^, olii tn"i rewrite the part no' as before'

* * 2SC1 740LN(2SC263411 K34A(lK60A)toA90)ts2473

wz-o73w2-044

Part No.

Part No. Symbol & DescriPtion

a RCV-093

RSl /2PSF 561JR S l P F 1 3 1 J

RD1 /4PM trtrDJ

VR1-1 , VRl-2 Variable 2Ok-A

R455, R485R453

R4o1-R452, R454, R456-R484',

Fr486-R496I

I

colLsMark

SEMICONDUCTORSSymbol & DeTniPtion

Mark Part No. Symbol & Description

RTX-OIORTF-085RTF{84RTD-083

RSR.O35

Control AssemblYCAPACITORS

OSC btock

Peaking coi l {3 '9mH)

TraP coil

MPX f i l ter btock

Relay

* * HA12006** 8A843** 8A336** HD7432** M51202L

r* 2sc1740LN(2Sc26341

** 2SC2060** 25A1127

(25A826LN)

** 2SC1740LNl , ** zsotoat

(2SD837)

* 152473

r WO3B(wo3C)

* 1K344(1 K60A)

tc4011c4021c403tc404rc405

Q401, c,404-0406, 0409,

0414. Q417, 0419,

0407. 0408, 0410,0,4210402,0403,o418,0.420

a422-o,425o412

D4o1-D403, D4o7-D409, D41

D414, D41g'D429, D432,

D4o4-D406, D415

D416.D417,D430,D431

T301L1 03,L203L102,L202L l01 ,L210

RY3O1

Mark Part No' Symbol & Description

coMA 223K 50

CEA ORlOM 50

CEA OR22M 50

CEA OR33M 50

cEA 010M 50

cEA 470M 10

c E A 1 0 1 M 1 0

c E A 2 2 1 M 1 0

cEA 100M 16

cEA 220M 16

c401c423ç417c419c427, c428, c433, c434, c441',

c442,C443

c407 ,c410 ,c440 'c445c404 ,c405 ,c4 I 4 ,c426c406c425,C429,C430-c432c436

5 l

12.2.5

SettingModeTest TapeAC mV meterInput Signal

Recording/Playback FrequencyResponse Adjustment

Overall Frequency ResponseUsing STD-608A with DOLBY NR OFF

Using STD-603 with DOLBY NR OFE

Using STD-6OB with DOLBYNR ON

Using STD-604 with DOLBY NR OFF

63Hr 125H2 333H2 ,kHz Ê

Usîng STD-604 with DOLBYN.R ON

RecordSTD-608ALINE OUTPUT333H2, - 30dBv (31mV)to LINE INPUT

Procedure1. Set the TAPE SELECTOR to the NORM posi-

t ion.2. Adjust the INPUT level control so that the

AC mV meter reads - ZldBv (aa.6 mV).3. Record the 333H2 and 6.3kHz signals onto the

STD608A. Play back the tape and adjust theVR103 (L ch) and VR 203 (R ch) so that thedifference between two is OdB_t.b dB.

4. As listed in the specilications in Fig. 12-13and check to see that performance meetsspecifications.

Fig. 12-13 Recording/Playback frequency responseadjustment

Frequency ResponseUsing STD-331A with DOLBY NR OFFHoweuer, the right channel is compensated by -IdB at63H2, and -0.5d8 at 125H2 because of the ineulntioneffect.

63Hr r25Hr 333Hr e*", ea*",

Using STD-608A with DOLBY NR ON

V R 1 0 3 ( L c hVR203 (R cl '

333H2 ,kHz 6.3kHz lZtH.

63Hz t2sHz 333H2 zkHz 6,3kHr lgkHz

Fis. 12-14 Frequency responseFig. 12-15 Frequency response

12. nÉcLAGES12.1 nÉcleces mÉcarutouEsAvant de procéder au réglaç

Nettoyer les deux supports de bobine, le ca-bestan et le galet presseur à I'aide d'un bâtonnetimbibé d'alcool.

12.1.1 Réglaç de la force d'appui du galetpresseur

l. Mettre la platine en mode de reproduction.2. Appuyer doucement sur le bras du galet

presseur à I'aide d'une jauge de pression et sé-parer légèrement le galet presseur du cabestan.

3. Laisser ensuite revenir le galet presseur sur lecabestan et lire la valeur lorsque le galet pres-seur commence à toumer. Si la valeur lue nese situe pas entre 2O0g et 3509, remplacer leressort du galet presseur.

Cabestan

i"::::;tde Pression du

(Pièce no RBH-7601

Fig. 12-1 Réglage de la pression du galet-presseur

12.1.2 Réglage du couple du support de bobineMesurer le couple à I'aide d'un dynamomètre

dans les modes de lecture, d'avance rapide (FF) etde rebobinage (REW). Les valeurs mesurées doiventnormalement se situer dans les limites admissiblesdonnées au tableau 1.

Si les valeurs mesurées se trouvent en dehors desplages indiquées, remplacer I'assemblage support debobine TU (Éception) et/ou I'assemblage supportde bobine débiteur, la poulie libre TU ou I'assem-blage complet du bras d'entraînement.

Tableau I

12.1.3 Réglaç de la vitesse de défilement de labande

Raccorder le fréquencemètre aux bomes desortie LINE OUTPLTI.Reproduire la partie à SkHz de la bande d'essaiSTD-301. Au début, la fréquence doit se situerdans la plage de 2995H2 à 3010H2, et elle peutêtre réglée en toumant la Ésistance ajustablesituée dans le trou de réglage du moteur-cabestan, comme indiqué àlaîig. L2-2.

La vitese de défilement & la bande augmente lorsque la résis'ance ajustable est tournée dans le sens des aiguilles d'une montre.et elle d&roît lorsgue l'on tourna la résisânce cn sens inverse.

Vitsse de difilementde la bonde diminuée

Tournwis (-l

Fis.12-2 Réglage de la vitesse de défi lement de la bande

12.1.4 Réglage du contact de détection d'en-registrement

Régler I'ergot ( + ) indiqué par une flèchesur Ia Fig. 12-3 sur une position telle que si unecassette possédant une languette de protectioncontre I'effacement accidentel est chargée dans lelogement, le contact à levier soit enclenché (ON),et que si une cassette démunie de cette languettede protection est chargée, le contact soit déclenché(oFF).

Plaque latérale gauche

Levierde commutateur(Commutateurde détectiond'enregistrement)

Fig. 12-3 Réglage du commutateur de détectiond'enregistrement

1 .

2.

IIndicateur de tension(Pièce no GGKO4Tl

Bras du galet-presseur

Support debobine TU

Support debobine débitrice

Mode de reproduction 35 à 55g.cm o 2 à Sg.cmMode FF 75 à 110s.cm o 2 à Sg.cmMode REW o 2 à Sg.cm 75 à 11Og.cm

o Couple de tension inverse

40

12.2.6 Record Level AdjustmentSince this adjustment determinet thG DOLBY NR

leuel during reocrding, it should be performed preciæly.

SettingM o d e . . . . R e c o r dTest Tape . STD-608A, STD-608,

STD.604AC mV meter . . . Tpl (L ch) and Tpz

(R ch) of the motherassembly

I n p u t S i g n a l . . . . B g g H z , - 1 0 d B v ( B 1 6 m V )

rNpur lever conho, . . . 3ir"ÏNx INPUr

Procedure

1. Ctreck that the AC mV meter reads -b.2dBvt4dB (870mV - BbOmV ) and adjust the inputsignal level with attenuator so that the AC mVmeter reads :5.2dBv (0.iaV).

2. Next set ttre DOLBy NR switch to the ONposition.

3. Record the BBBHz signal onto the STD-60SA.eUy

!_1c!r-the tape and adjusr rhe V8102 (Lch)and- VR202 (Rch) so that the AC mV meteireads -5.2dBv (0.bV).

Record the 333H2 signal onto the STD-609.PIay back the tape and check that the ACmV meter reads -5.2dBv t1.5dB (650mV -460mV).Record the 333H2 signal onto the STD-604.Play back the tape and check that the AC mVmeter reads -5.2dBv t1.5dB (6b0mV -460mV).

ADJ.POINT

4 .

o .

12.2.6 Record levelADJ.

VR102 (Lch ) ,VR202 (Rchl

Fig. 12-16 Record level adjustment

TP2-p

g--vRrol

Q-vR203

@-VRt03

qI

vR202

Fig.12-t l ADJ. point

12.2.7 Limiter Effect Check

SettingMode Record

TestTape " ' STD-608A

AC mV meter ' LINE OUTPUT

Input signal . 333H2 10dBv (316mV)tO LINE INPUT

Porcedure1. Adjust the INPUT level control so that the

ACmV meter reads -?dBv (0'45V)'

2. Connect the jumper cord between TP3 and

TP31. Likewise connect the jumper cord

between TP4 and TP31'3. Next change input signal level -10dBv and

then confiim the AC mV meter reads SdBv

(1.4v).4. Disconnect the jumper cords and confirm the

AC mV meter reads -2dBv J1'5dB'

12.2.8 Auto PlaY Movement Check

Connect a tester actoss the function outputjack and ground with the tester set to resistance

range, and make sure that:;

"Resistance is 100o or less at PLAY'FF'REWoperations.

o Resistance is sufficiently high (1 Mo or more)

at STOP oPeration.

333H2 - | odBv( 3 r 6 m V )

12-18 Limiter effed check

I

Fig. 12-19 Terminal Position

LINE OUTPUT

Terminal (LINE)INPUT level control( INPUT VR}

TP3-_0 0 0-1P4

o rJsr

12.1.5 Réglage de l'assemblaç de déæctionDessener la vis O et régler la position de

montage de I'assemblage de détection de manièreà ce que lorsqu'une cassette de type "NORMAL"est chargée dans le logement le contact à curseursoit déclenché (OFF), et que lorsqu'une cassettede type "METAL" est chargée, le contact à curseursoit enclenché (ON).

Contact à curseur:--s

Ensemblede détection

Fig. 124 Réglage de l'assemblage de détection

12.1.6 Réglaç de ltlectreaimant d'avance rapide(FF I

Mettre la platine en mode d'avance rapide (FF).Dessener ta vis @ et régler la position demontage de l'électro-aimant d'avance rapide(FF) de manière à ce que le trou carré deI'assemblage support de bobine soit de niveauavec la bosse de I'assemblage du bras d'entraîne-ment (c'est-àdire avec un êcart zérol, commeindiqué sur la Fig. 12-5.

Système de base(ensemble du bras d'entrainement)

Séparation 0

Contre-cabestan

Support debobine

dérouleuse

Mode de rebobinaç(REW}

Contre{abestan

Support de bobine dérouleuse

Solénolde FF(avance rapidel

Position d'avancerapide (FF)

Séparation O

Support debobinedébitrice

Contrecabestan

lMod" d'"u"n""rapide (FF)

- Engrenage d'entrainement

Support de bobine dérouleuse

1 .2.

12.1.7 Réglaç(REW}

1. Mettre la(RE1V).

2. Dessener la vis G) et régler la position demontage de l'électro-aimant de rebobinage(REW) de manière à ce que le trou carré del'assemblage support de bobine soit de niveauavec la bosse de I'assemblage du bras d'enhaîne-ment (c'est-à-dire avec un êcart zéro\, commeindiqué sur la Fig. 12-5.

de l'électro-aimant de rebobinaç

platine en mode de rebobinageFig. 12-5 Réglage du solénoide FF (REW)

Engrenage

6.

12.2 REGLAGES ELECTRIOUES

Précautionsl. Les réglages mécaniques doivent être terminés.2. Nettoyer les pièces suivantes à I'aide d'un

bâtonnet imbibé d'alcool: tête d'enregistre-ment/reproduction, galet phesseur, tête d'effacement, counoies en caoutchuc et cabestan.

3. Démagnétiser la tête d'enregistrement/repro-duction à I'aide d'un démagnétiseur de tête.

4. Ne pas utiliser de toumevis magnétisé pour lesréglages.

5. tæs Églages et les mesures doivent être réaliséspour les canaux de gauche et de droite avec latension d'alimentation nominale.Les réglages doivent être effectués dans l'ordreindiqué dans ce manuel de service. Une modifi-cation de cet ordre peut empêcher la réalisationde réglages corrects et peut provoquer unebaisse de performance.Les niveaux en cours de mesure sont basés surOdBv = lV. Raccorder une charge fictive de50 kS} (47 à 52 kQ) entre les bornes de sortie(ouTPUT).Laisser chauffer (vieillissement) le CT-X50pendant quelques minutes avant de procéderaux réglages.Placer le commutateur DOLBY NR sur OFFsauf indication contraire.

Equ ipements/outils d'esai requis1. Bande d'essai

STD.331A

STD.341A

STD-608A

STD-603 Bande "CrO2" viergeSTD-604 Bande "METAL" viergeOscillateur BFMillivoltmètre altematif (mV CA)AtténuateurOscilloscopeRésistance 50 kS} (47 à 52 kA )

L€VEL ( dEI

3 3 f H rf33Hr I r4 rHr l l2 5 rH I o t H . 8r t r ; 3 r H

- 20

3O..c 3O..c lo3.c lO..c 603.. lo.ac 3O..c

Fig. 12€ Contenu de la bande d'essaiSTD-331ANiwau (dBl

12.2.1 Réglage du circuit DOLBY NR

PréparationMode . . . . EnregistrementMillivoltmètre CA. . . . . TPl (canal de gauche

('L") et TP2 (canal dedroit "R") de I'assem-blage principal

Signal d'entrée . . 2kHz, - LOdBv (316mV)à I'entrée de ligno LINEINPUT

Proédure1. Régler la commande de niveau d'entrée INPUT

de manière à ce que le millivoltmètre CAindique - 2,2dBv ( 776mV).

2. Faire ensuite passer le niveau du signal d'entréeà -30dBv (31,6mV) et placer le commutateurDOLBY NR sur la position ON.

3. Régler VR-304 de manière à ce que le milli-voltmètre CA indique - 17,9dBv (127mV).

Entée de I ine( L I N E I N P U T ) TêÉ

d'enregistrement

7 .

8.

9 .

2kHz, -lOdBv(316mV)2kHz, -30dBv(31,6mV1

/rpi(€nal de

gache "L")- -J {ceôa l

de droi t

I R } t

Pour le propos généralde la reproductionPour le réglage de lareproductionBande "NORMAL"vierge

FiS.128 Réglage du circuit Dolby NR

12.2.2 Réglage en azamut de la têtePréparationMode ReproductionBanded'essai . . . . STD-341A(10kHz,

- 20dB)Millivoltmètre CA Sortie de ligne

(LINE OUTPUT)VR101, VR201 . . Tournées en position

maxlmumProédure

Régler la vis de Églage d'azimut de manière àobtenir I'indication maximum du millivoltmètreCA pour les canaux de gauche et de droite.Lorsque ce réglage est terminé, verrouiller la vis àI'aide du blocage de vis.

l-r/r d" Gl"s" d'dffiil

n v -rête de lÈ-@l--\E1ti€

de rione (L|NE ourPur)

reproductionl- |,--/ l ?-1---.lI - | gsorololC@re1

J | | Y l m a x l m u m lsrD-341A I I l -1okHz. -2OdB â

2.3.4.ô.6.

o- ? o

Fig. 12-7 Contenu de la bande d'essai STD-341AFig. 12-9 Réglage d'azimut de la tête

I nEs ts l0Rs:ldbrd in A ZW !5S tol.ræ u.l6 olh.Mi* mrd k t9,

M : Mo, lF l ' l% lc l I ' 2$ {x , i rO. , t , !æ% rorÙ.æe

2 CAPACIIOFSlldÉùd h csiiY {!Fl/d(ç (Vt ùd6ot@U mtd o I gF

rdtdion whh@t rcnç i3 æv.!c@t êlærolYtb c+æior

3 VOLIAG€

E : æ É t ç l v ) . t É i F r t i F l

. O 'HEÂS:

A : eiuli4 æinrrh. /h m..r l@d d m mæ6r Ènr dt6 th. 'm

FilEa ol ft eey læto. ol rtu M. Tkçl@,ùrdæiq,h ræ burFnso l ûn tÈ. lddgn i l 'on

2SA826LN2SC1740LN

HAl200584843

-5 STTCHES

5I : PMR52,3 : P l^Y

52,5 reW

ON - OFFo -trFs - o fd -gEE

9,5: sloP oN - gfE

56 : PAUSE57 : FEC

$ . REC MUE

oN- f f i

O N - 6 F59 : OCBY NR q -gqEsro EN æwNrmcu HglE - @.!9!Esfi T|MER ON - 9fE5i2 : TIMER PLAY _.æqs r 3 : M S oN -otr

NOTE:Playbach signal route

-_-Recording signal routeSl4 rff i SEÉCTG W-C.O2

Sl5 : IPE SEÉCTæ ç!93 - GTAL

lhuùlid idic.G rhe *i ld æ.iton

Thk is th. bb æh6.i. diqrh br r6a æùd ci@n Êv v.ry

dù. ro inÈdmnc in 6iS.

I7

25A11272SC2634

HD7432

L o t N o

zSC2(b0

Typ. No

8A336

25D837 H411226HAt2006

2SD1031 M512o2L

lype No

NOTE:The indicated semiconductorc are repreæntatiue onesonly. Other alternative semiconductora may be used andare listed in the parts list.

L J

-

1O. ELECTRICAL PARTS LISTNOlES:o When ordertng resistorc, first convert resistance wlues into code form æ shown in

the following examples.Ex. 1 When there are 2 effectiue digits (any d.igit apart from 0), such æ 560 ohm

and 47h ohm (tolerance is shown by J=5%, and K=10% ).560f) 56 x 1014 7 h a 4 7 x 1 0 3

5 6 1 . . . . . R D % P S E B E J473. . . .. RD%PS EAPIB J

o . s a 0 R 5 . . . . . . n N 2 r l [ Ù E B Kr o 0 1 0 . . . . . . R S I P @ n @ K

Ex. 2 When there are 3 effectiue digits (such æ in high precision metal filmresistorc).5.62ko 562 x 10 ' 5621 . . . . RN'/SR EltrEE r

o The I marh found on some component parts indicates the importance of the

safeti factor of the part. Therefore, when replacing, be sure to use parts of

ide ntical designation,o For your Parts Stoch controt, the fast mouing items are indicated with the

marhs ** and *** GENERALLY MOVES FASTER THAN *

This ctasification shall be adiusted by each distributor becarse it depends on

model number, temperature, humidity, etc'

Misccllaneous Parts LastP.C.BOARD ASSEMBLIES

Mother AssemblyCAPACITORS

Mark Part No. Symbol & DescriptionMark Part No. Symbol & DescriPtion

OTHERS

Mark Part No.

Mother assembly

Control assemblYFunction switch assemblYTimer switch assemblYPhoto sensor assembly

Detect assemblY

Symbol & Description

CKDYB '01 K 50CEANL 33OM 16CEANL 22OM 16CEA ORlOM 50CEA OR33M 50

CEA OR47M 50cEA 010M 50CEA 3R3M 50cEA 221M 10cEA 100M 16

cEA 470M 16c E A 1 0 1 M 1 6c E A 4 7 1 M 1 6coMA 472K 50coMA 1 53K 50

coMA 333J 50

coMA 473J 50C K D H Y F 1 O 2 Z 5 0

ccDsL 101 K 500

cl01,c201c102,c202c103,c203c123,C125,C223,C225c117 ,C126,C217 ,C226

c127,C227c310c309c307c l05 , c l 07 , c l 08 , C l11 , C l13 -c115, C120-C122, C124, C12A,c129, C130. C205, C207, c208,c211. C213-c2J5, C220, c221,c222, C224, C228-C230, C302.c305. c306.

c308c302,c303c304cl 18,C218cl 16,C1 19,C216,C219

c106, c112, C131, C132, C206,c212,C231 ,C232c1 33,C233c104, cl09, cl10, c204, c209,c210c1 35,C235

i \ *A * *A

A

RTT.238R5A046RDG.O22{RDG{301REC-272

Power transformer (1 2OVlPower switchPower cord

Strain r l ie f

LampPlunger solenoid P

Plunger solenoid F

Plunger solenoid RREC/PB head

Erase head

AAL

BELO84* RXP-092* RXP-100r RXP-101

rr RPBO84

* RPBO8s

Mark Part No. Symbol & OescriPtion

RESISTORS

NOTE:When ordering resistors' conuert -the resistance ualue

into cod.e fo"*,'iii tn"i rewite the part no' as before'

Symbol & DescriPtion

cEA 330M 16

cEA 470M 16cEA221M 16cEA 102M 16cEA222r/l 16

cEA 471M 25

cÊA22'tM25coMA 102J 50

coMA 103J 50

coMA 104J 50

CKDYF 1032 50

C K D H Y F 1 O 2 Z 5 0CKDHYF 1 O3Z 50

CKDYF 473250

RCG-007

cr'.20c402,c4a3,C444c412,c437c439c416

c415c413c424c418,c/.21c422

c445c409c411c435

Part No.

SEMICONDUCTORS

t R c P l 1 5(RCP-2001

* RcP-150(RCP-195)

* BcP-149(RCP-193)RSl PF 56OJRD1 /4PM OOÛJ

VR103,VR2O3 Semi-f ixed 150k-B

VRlOl ,VR2O1 Semi-f ixed 22k'B

VR102,VFl202 Semi-tixed 10K-B

VR3Ol8304R101-Rl37 , R139-R145, R201-

R237, R239-R245, R301-R303'

R3o5-R307, Ft309, R310

Symbol & Description

rc101,1C2011c l02

01 o 1 -o1 07,0201 -a207'0301

Dl01 ,D201

D102,D202,D301-D306

2D30120302

c408 Capacitor array

Mark Part No.

* r HA12005** HA11226

RESISTORS

NOTE:When ordering resistors' cont)ert -the resistance value

into code fo'^, olii tn"i rewrite the part no' as before'

* * 2SC1 740LN(2SC263411 K34A(lK60A)toA90)ts2473

wz-o73w2-044

Part No.

Part No. Symbol & DescriPtion

a RCV-093

RSl /2PSF 561JR S l P F 1 3 1 J

RD1 /4PM trtrDJ

VR1-1 , VRl-2 Variable 2Ok-A

R455, R485R453

R4o1-R452, R454, R456-R484',

Fr486-R496I

I

colLsMark

SEMICONDUCTORSSymbol & DeTniPtion

Mark Part No. Symbol & Description

RTX-OIORTF-085RTF{84RTD-083

RSR.O35

Control AssemblYCAPACITORS

OSC btock

Peaking coi l {3 '9mH)

TraP coil

MPX f i l ter btock

Relay

* * HA12006** 8A843** 8A336** HD7432** M51202L

r* 2sc1740LN(2Sc26341

** 2SC2060** 25A1127

(25A826LN)

** 2SC1740LNl , ** zsotoat

(2SD837)

* 152473

r WO3B(wo3C)

* 1K344(1 K60A)

tc4011c4021c403tc404rc405

Q401, c,404-0406, 0409,

0414. Q417, 0419,

0407. 0408, 0410,0,4210402,0403,o418,0.420

a422-o,425o412

D4o1-D403, D4o7-D409, D41

D414, D41g'D429, D432,

D4o4-D406, D415

D416.D417,D430,D431

T301L1 03,L203L102,L202L l01 ,L210

RY3O1

Mark Part No' Symbol & Description

coMA 223K 50

CEA ORlOM 50

CEA OR22M 50

CEA OR33M 50

cEA 010M 50

cEA 470M 10

c E A 1 0 1 M 1 0

c E A 2 2 1 M 1 0

cEA 100M 16

cEA 220M 16

c401c423ç417c419c427, c428, c433, c434, c441',

c442,C443

c407 ,c410 ,c440 'c445c404 ,c405 ,c4 I 4 ,c426c406c425,C429,C430-c432c436

5 l

12.2.5

SettingModeTest TapeAC mV meterInput Signal

Recording/Playback FrequencyResponse Adjustment

Overall Frequency ResponseUsing STD-608A with DOLBY NR OFF

Using STD-603 with DOLBY NR OFE

Using STD-6OB with DOLBYNR ON

Using STD-604 with DOLBY NR OFF

63Hr 125H2 333H2 ,kHz Ê

Usîng STD-604 with DOLBYN.R ON

RecordSTD-608ALINE OUTPUT333H2, - 30dBv (31mV)to LINE INPUT

Procedure1. Set the TAPE SELECTOR to the NORM posi-

t ion.2. Adjust the INPUT level control so that the

AC mV meter reads - ZldBv (aa.6 mV).3. Record the 333H2 and 6.3kHz signals onto the

STD608A. Play back the tape and adjust theVR103 (L ch) and VR 203 (R ch) so that thedifference between two is OdB_t.b dB.

4. As listed in the specilications in Fig. 12-13and check to see that performance meetsspecifications.

Fig. 12-13 Recording/Playback frequency responseadjustment

Frequency ResponseUsing STD-331A with DOLBY NR OFFHoweuer, the right channel is compensated by -IdB at63H2, and -0.5d8 at 125H2 because of the ineulntioneffect.

63Hr r25Hr 333Hr e*", ea*",

Using STD-608A with DOLBY NR ON

V R 1 0 3 ( L c hVR203 (R cl '

333H2 ,kHz 6.3kHz lZtH.

63Hz t2sHz 333H2 zkHz 6,3kHr lgkHz

Fis. 12-14 Frequency responseFig. 12-15 Frequency response

12. nÉcLAGES12.1 nÉcleces mÉcarutouEsAvant de procéder au réglaç

Nettoyer les deux supports de bobine, le ca-bestan et le galet presseur à I'aide d'un bâtonnetimbibé d'alcool.

12.1.1 Réglaç de la force d'appui du galetpresseur

l. Mettre la platine en mode de reproduction.2. Appuyer doucement sur le bras du galet

presseur à I'aide d'une jauge de pression et sé-parer légèrement le galet presseur du cabestan.

3. Laisser ensuite revenir le galet presseur sur lecabestan et lire la valeur lorsque le galet pres-seur commence à toumer. Si la valeur lue nese situe pas entre 2O0g et 3509, remplacer leressort du galet presseur.

Cabestan

i"::::;tde Pression du

(Pièce no RBH-7601

Fig. 12-1 Réglage de la pression du galet-presseur

12.1.2 Réglage du couple du support de bobineMesurer le couple à I'aide d'un dynamomètre

dans les modes de lecture, d'avance rapide (FF) etde rebobinage (REW). Les valeurs mesurées doiventnormalement se situer dans les limites admissiblesdonnées au tableau 1.

Si les valeurs mesurées se trouvent en dehors desplages indiquées, remplacer I'assemblage support debobine TU (Éception) et/ou I'assemblage supportde bobine débiteur, la poulie libre TU ou I'assem-blage complet du bras d'entraînement.

Tableau I

12.1.3 Réglaç de la vitesse de défilement de labande

Raccorder le fréquencemètre aux bomes desortie LINE OUTPLTI.Reproduire la partie à SkHz de la bande d'essaiSTD-301. Au début, la fréquence doit se situerdans la plage de 2995H2 à 3010H2, et elle peutêtre réglée en toumant la Ésistance ajustablesituée dans le trou de réglage du moteur-cabestan, comme indiqué àlaîig. L2-2.

La vitese de défilement & la bande augmente lorsque la résis'ance ajustable est tournée dans le sens des aiguilles d'une montre.et elle d&roît lorsgue l'on tourna la résisânce cn sens inverse.

Vitsse de difilementde la bonde diminuée

Tournwis (-l

Fis.12-2 Réglage de la vitesse de défi lement de la bande

12.1.4 Réglage du contact de détection d'en-registrement

Régler I'ergot ( + ) indiqué par une flèchesur Ia Fig. 12-3 sur une position telle que si unecassette possédant une languette de protectioncontre I'effacement accidentel est chargée dans lelogement, le contact à levier soit enclenché (ON),et que si une cassette démunie de cette languettede protection est chargée, le contact soit déclenché(oFF).

Plaque latérale gauche

Levierde commutateur(Commutateurde détectiond'enregistrement)

Fig. 12-3 Réglage du commutateur de détectiond'enregistrement

1 .

2.

IIndicateur de tension(Pièce no GGKO4Tl

Bras du galet-presseur

Support debobine TU

Support debobine débitrice

Mode de reproduction 35 à 55g.cm o 2 à Sg.cmMode FF 75 à 110s.cm o 2 à Sg.cmMode REW o 2 à Sg.cm 75 à 11Og.cm

o Couple de tension inverse

40

12.2.6 Record Level AdjustmentSince this adjustment determinet thG DOLBY NR

leuel during reocrding, it should be performed preciæly.

SettingM o d e . . . . R e c o r dTest Tape . STD-608A, STD-608,

STD.604AC mV meter . . . Tpl (L ch) and Tpz

(R ch) of the motherassembly

I n p u t S i g n a l . . . . B g g H z , - 1 0 d B v ( B 1 6 m V )

rNpur lever conho, . . . 3ir"ÏNx INPUr

Procedure

1. Ctreck that the AC mV meter reads -b.2dBvt4dB (870mV - BbOmV ) and adjust the inputsignal level with attenuator so that the AC mVmeter reads :5.2dBv (0.iaV).

2. Next set ttre DOLBy NR switch to the ONposition.

3. Record the BBBHz signal onto the STD-60SA.eUy

!_1c!r-the tape and adjusr rhe V8102 (Lch)and- VR202 (Rch) so that the AC mV meteireads -5.2dBv (0.bV).

Record the 333H2 signal onto the STD-609.PIay back the tape and check that the ACmV meter reads -5.2dBv t1.5dB (650mV -460mV).Record the 333H2 signal onto the STD-604.Play back the tape and check that the AC mVmeter reads -5.2dBv t1.5dB (6b0mV -460mV).

ADJ.POINT

4 .

o .

12.2.6 Record levelADJ.

VR102 (Lch ) ,VR202 (Rchl

Fig. 12-16 Record level adjustment

TP2-p

g--vRrol

Q-vR203

@-VRt03

qI

vR202

Fig.12-t l ADJ. point

12.2.7 Limiter Effect Check

SettingMode Record

TestTape " ' STD-608A

AC mV meter ' LINE OUTPUT

Input signal . 333H2 10dBv (316mV)tO LINE INPUT

Porcedure1. Adjust the INPUT level control so that the

ACmV meter reads -?dBv (0'45V)'

2. Connect the jumper cord between TP3 and

TP31. Likewise connect the jumper cord

between TP4 and TP31'3. Next change input signal level -10dBv and

then confiim the AC mV meter reads SdBv

(1.4v).4. Disconnect the jumper cords and confirm the

AC mV meter reads -2dBv J1'5dB'

12.2.8 Auto PlaY Movement Check

Connect a tester actoss the function outputjack and ground with the tester set to resistance

range, and make sure that:;

"Resistance is 100o or less at PLAY'FF'REWoperations.

o Resistance is sufficiently high (1 Mo or more)

at STOP oPeration.

333H2 - | odBv( 3 r 6 m V )

12-18 Limiter effed check

I

Fig. 12-19 Terminal Position

LINE OUTPUT

Terminal (LINE)INPUT level control( INPUT VR}

TP3-_0 0 0-1P4

o rJsr

12.1.5 Réglage de l'assemblaç de déæctionDessener la vis O et régler la position de

montage de I'assemblage de détection de manièreà ce que lorsqu'une cassette de type "NORMAL"est chargée dans le logement le contact à curseursoit déclenché (OFF), et que lorsqu'une cassettede type "METAL" est chargée, le contact à curseursoit enclenché (ON).

Contact à curseur:--s

Ensemblede détection

Fig. 124 Réglage de l'assemblage de détection

12.1.6 Réglaç de ltlectreaimant d'avance rapide(FF I

Mettre la platine en mode d'avance rapide (FF).Dessener ta vis @ et régler la position demontage de l'électro-aimant d'avance rapide(FF) de manière à ce que le trou carré deI'assemblage support de bobine soit de niveauavec la bosse de I'assemblage du bras d'entraîne-ment (c'est-àdire avec un êcart zérol, commeindiqué sur la Fig. 12-5.

Système de base(ensemble du bras d'entrainement)

Séparation 0

Contre-cabestan

Support debobine

dérouleuse

Mode de rebobinaç(REW}

Contre{abestan

Support de bobine dérouleuse

Solénolde FF(avance rapidel

Position d'avancerapide (FF)

Séparation O

Support debobinedébitrice

Contrecabestan

lMod" d'"u"n""rapide (FF)

- Engrenage d'entrainement

Support de bobine dérouleuse

1 .2.

12.1.7 Réglaç(REW}

1. Mettre la(RE1V).

2. Dessener la vis G) et régler la position demontage de l'électro-aimant de rebobinage(REW) de manière à ce que le trou carré del'assemblage support de bobine soit de niveauavec la bosse de I'assemblage du bras d'enhaîne-ment (c'est-à-dire avec un êcart zéro\, commeindiqué sur la Fig. 12-5.

de l'électro-aimant de rebobinaç

platine en mode de rebobinageFig. 12-5 Réglage du solénoide FF (REW)

Engrenage

6.

12.2 REGLAGES ELECTRIOUES

Précautionsl. Les réglages mécaniques doivent être terminés.2. Nettoyer les pièces suivantes à I'aide d'un

bâtonnet imbibé d'alcool: tête d'enregistre-ment/reproduction, galet phesseur, tête d'effacement, counoies en caoutchuc et cabestan.

3. Démagnétiser la tête d'enregistrement/repro-duction à I'aide d'un démagnétiseur de tête.

4. Ne pas utiliser de toumevis magnétisé pour lesréglages.

5. tæs Églages et les mesures doivent être réaliséspour les canaux de gauche et de droite avec latension d'alimentation nominale.Les réglages doivent être effectués dans l'ordreindiqué dans ce manuel de service. Une modifi-cation de cet ordre peut empêcher la réalisationde réglages corrects et peut provoquer unebaisse de performance.Les niveaux en cours de mesure sont basés surOdBv = lV. Raccorder une charge fictive de50 kS} (47 à 52 kQ) entre les bornes de sortie(ouTPUT).Laisser chauffer (vieillissement) le CT-X50pendant quelques minutes avant de procéderaux réglages.Placer le commutateur DOLBY NR sur OFFsauf indication contraire.

Equ ipements/outils d'esai requis1. Bande d'essai

STD.331A

STD.341A

STD-608A

STD-603 Bande "CrO2" viergeSTD-604 Bande "METAL" viergeOscillateur BFMillivoltmètre altematif (mV CA)AtténuateurOscilloscopeRésistance 50 kS} (47 à 52 kA )

L€VEL ( dEI

3 3 f H rf33Hr I r4 rHr l l2 5 rH I o t H . 8r t r ; 3 r H

- 20

3O..c 3O..c lo3.c lO..c 603.. lo.ac 3O..c

Fig. 12€ Contenu de la bande d'essaiSTD-331ANiwau (dBl

12.2.1 Réglage du circuit DOLBY NR

PréparationMode . . . . EnregistrementMillivoltmètre CA. . . . . TPl (canal de gauche

('L") et TP2 (canal dedroit "R") de I'assem-blage principal

Signal d'entrée . . 2kHz, - LOdBv (316mV)à I'entrée de ligno LINEINPUT

Proédure1. Régler la commande de niveau d'entrée INPUT

de manière à ce que le millivoltmètre CAindique - 2,2dBv ( 776mV).

2. Faire ensuite passer le niveau du signal d'entréeà -30dBv (31,6mV) et placer le commutateurDOLBY NR sur la position ON.

3. Régler VR-304 de manière à ce que le milli-voltmètre CA indique - 17,9dBv (127mV).

Entée de I ine( L I N E I N P U T ) TêÉ

d'enregistrement

7 .

8.

9 .

2kHz, -lOdBv(316mV)2kHz, -30dBv(31,6mV1

/rpi(€nal de

gache "L")- -J {ceôa l

de droi t

I R } t

Pour le propos généralde la reproductionPour le réglage de lareproductionBande "NORMAL"vierge

FiS.128 Réglage du circuit Dolby NR

12.2.2 Réglage en azamut de la têtePréparationMode ReproductionBanded'essai . . . . STD-341A(10kHz,

- 20dB)Millivoltmètre CA Sortie de ligne

(LINE OUTPUT)VR101, VR201 . . Tournées en position

maxlmumProédure

Régler la vis de Églage d'azimut de manière àobtenir I'indication maximum du millivoltmètreCA pour les canaux de gauche et de droite.Lorsque ce réglage est terminé, verrouiller la vis àI'aide du blocage de vis.

l-r/r d" Gl"s" d'dffiil

n v -rête de lÈ-@l--\E1ti€

de rione (L|NE ourPur)

reproductionl- |,--/ l ?-1---.lI - | gsorololC@re1

J | | Y l m a x l m u m lsrD-341A I I l -1okHz. -2OdB â

2.3.4.ô.6.

o- ? o

Fig. 12-7 Contenu de la bande d'essai STD-341AFig. 12-9 Réglage d'azimut de la tête

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