TMR-RF845RSERVICE MANUALVer 1.0 2000. 07

AEP Model UK Model

TMR-RF845R is the component model block one in the MDR-RF845RK. COMPONENT MODEL NAME FOR MDR-RF845RKHeadphones Transmitter MDR-RF845R TMR-RF845R

SPECIFICATIONSGeneral Carrier frequency 863.5 864.5 MHz Channel Modulation Ch1, Ch2, Ch3 FM stereo 20 20,000 Hz Transmitter Power source Audio input Dimensions Mass DC 9 V: supplied AC power adaptor phono jacks/stereo mini jack Approx. 150 mm dia 108 mm (6 4 1/3 in.) (w/h) Approx. 190 g (6.2 oz.)

Frequency response

Design and specifications are subject to change without notice.

TRANSMITTER

SECTION 1 GENERAL

This section is extracted from instruction manual.

A To connect to a headphones jack

Setting up the transmitter 1 Connect the transmitter to audio/videoequipment. Select one of the hookups below depending on the jack type:

Transmitter to AUDIO IN A jacks

OFF ON NOISE FILTER

B

R AUDIO IN

A

L

DC IN 9V

CHANNEL

123

Right channel (red)

Left channel (white)

Connecting cord (supplied)

Unimatch plug adaptor (supplied) to headphones jack (stereo phone jack)

to headphones jack (stereo mini jack)

CD Walkman, MD Walkman, WALKMAN*, VCR, etc.

SAFETY CHECK-OUTAfter correcting the original service problem, perform the following safety checks before releasing the set to the customer. 1. Check the area of your repair for unsoldered or poorlysoldered connections. Check the entire board surface for solder splashes and bridges. Check the interboard wiring to ensure that no wires are "pinched" or contact high-wattage resistors. Look for unauthorized replacement parts, particularly transistors, that were installed during a previous repair. Point them out to the customer and recommend their replacement. Look for parts which, through functioning, show obvious signs of deterioration. Point them out to the customer and recommend their replacement. 5. 6. Check the B+ voltage to see it is at the values specified. Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270C during repairing. Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). Be careful not to apply force on the conductor when soldering

2. 3.

4.

2

SECTION 2 DISASSEMBLYNote : Follow the disassembly procedure in the numerical order given.

2-1. CABINET (UPPER)Cabinet (upper)

2

1 Four screws (P 2 8)

2-2. TX-BASE BOARD

2 TX-BASE board

Cabinet assy, lower

1

3

SECTION 3 ELECTRICAL ADJUSTMENTSSetting :AF signal generator set TMR-RF875R

Pilot signal Modulation Check and Adjustment 1. Set the channel to CH2. 2. No signal input (The operating time in this case is limited to 4 or 5 minutes.) 3. Measure the movable terminal of RV403 using an digital voltmeter (AC range) and make sure the value is 1.6mVrms 0.1mV. If the measured value is other than the specified value, adjust to 1.6mVrms 0.1mV by turning the RV403 on the TX-BASE board. Connection points and Adjustment Location :

L-CH (J402) Telescopic antenna Frequency counter 8 cm TMR-RF875R set

[TK-BASE BOARD] (Component side)

CH3 CH2 CH1 (L-CH) (R-CH)

S402

J402

Send Frequency Check 1. Set the noise filter SW to OFF. 2. Input a signal of 1 kHz 40 mVrms to only the L-CH (J402). 3. Connect a telescopic antenna to the frequency counter input and extend the antenna to a length of approximately 8 cm. 4. Place TX-BASE board close to the frequency counter, then measure the frequencies of CH1, CH2 and CH3 and make sure the values are as follows: CH1 : 863.5 MHz 40 kHz CH2 : 864.0 MHz 40 kHz CH3 : 864.5 MHz 40 kHz When the frequency is not satisfied the specified value, exchange vco unit. When completed with replacement, recheck the frequecies of CH1, CH2 and CH3.

RV403 VCO UNIT

4

SECTION 4 DIAGRAMS4-1. BLOCK DIAGRAM

TMR-RF845R

IC403 STEREO MPXJ401

ANT401 RV403

R-CH

IC401 INPUT AMP LPF 1 CH1 AMP BUFFER TIME DEVISION MPX 9

B

MOD IN

ANT

AUDIO IN L A R

J402

R-CH NOISE FILTER S401 NOISE FILTER OFF | ON

14

CH2 AMP T-OUT

IC405(2/2) BUFFER POWER OFF DET D402 CHG IC402 6 7 5V +5V REG SWITCH Q404 D401 POWERJ404

R-CH

CHARGE

OSC AMP

DIVIDER

8

VCO UNIT

DC IN 9V

X401 38kHz

B+ CE DI CL

+4V Q402

11 12 13 IC405(1/2) Signal path. 16 : AUDIO BUFFER Q401 RECT D404,405 INPUT DET 15 CE DI CL VS IC404 VCO CONTROLLER 9 7 6 1 S402 2 3 CHANNEL 5V 10 16 2V D408

Note on Printed Wiring Board: X : parts extracted from the component side. b : Pattern from the side which enables seeing. Note on Schematic Diagram: All capacitors are in F unless otherwise noted. pF: F 50 WV or less are not indicated except for electrolytics and tantalums. All resistors are in and 1/4 W or less unless otherwise specified. : internal component. A : B+ Line. H : adjustment for repair. Power voltage is dc 9 V and fed with regulated dc power supply from battery terminal. Voltages are dc with respect to ground under no-signal conditions. Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances. Circled numbers refer to waveforms. Signal path. L: AUDIO

5

6

TMR-RF845R4-2. SCHEMATIC DIAGRAM

220

330p

100k

r r

7

8

TMR-RF845R4-3. PRINTED WIRING BOARD

TX-BASE BOARD Semiconductor

LocationRef. No. D401 D402 D403 D404 D405 D407 D408 D410 IC401 IC402 IC403 IC404 IC405 Q401 Q402 Q404 Location D-3 D-3 A-4 D-2 D-2 B-3 D-4 B-4 B-2 B-4 D-4 B-3 D-2 D-1 B-4 B-4

9

10

SECTION 5 EXPLODED VIEWSNOTE: -XX, -X mean standardized parts, so they may have some differences from the original one. Items marked * are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. The mechanical parts with no reference number in the exploded views are not supplied. Accessories and packing materials are given in the last of this parts list. Color Indication of Appearance Parts Example: KNOB, BALANCE (WHITE) . . . (RED) Parts of Color Cabinets Color

TX-BASENOTE: Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set. -XX, -X mean standardized parts, so they may have some difference from the original one. Items marked * are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. Ref. No. Part No. Description

SECTION 6 ELECTRICAL PARTS LISTCAPACITORS: uF: F RESISTORS All resistors are in ohms. METAL: metal-film resistor METAL OXIDE: Metal Oxide-film resistor F: nonflammable COILS uH: H SEMICONDUCTORS In each case, u: , for example: uA...: A... , uPA... , PA... , uPB... , PB... , uPC... , PC... , uPD..., PD...When indicating parts by reference number, please include the board name.

1

Remarks

Ref. No. C475 C476 C478 C480 C481 C483 C488

Part No. 1-124-635-00 1-126-382-11 1-163-038-00 1-163-021-91 1-163-251-11

Description ELECT ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP 220uF 100uF 0.1uF 0.01uF 100PF 7PF 0.01uF

Remarks 20.00% 6.3V 20.00% 16V 25V 10.00% 50V 5.00% 50V 0.25PF 50V 10.00% 50V

2

*

A-4542-645-A TX-BASE BOARD, COMPLETE *********************** A-4542-646-A TX-VCO UNIT (VCO) < ANTENNA > ANT401 4-213-164-01 TERMINAL, ANTENNA < CAPACITOR >

*

3

1-163-224-11 CERAMIC CHIP 1-163-021-91 CERAMIC CHIP < DIODE >

8

C403 C406 C407 C413 C416 C417 C421 C422 C423 C425 C426 C427 C428 C429 C430

1-163-009-11 1-163-037-11 1-126-961-11 1-163-009-11 1-163-037-11 1-126-961-11 1-124-234-00 1-126-934-11 1-163-251-11 1-163-037-11 1-163-021-91 1-163-021-91 1-163-251-11 1-163-251-11 1-124-259-11 1-126-157-11 1-163-018-00 1-164-346-11 1-163-038-00 1-126-157-11 1-163-251-11 1-126-157-11 1-163-018-00 1-164-346-11 1-163-251-11 1-163-251-11 1-124-635-00 1-163-038-00 1-126-157-11 1-163-251-11 1-163-227-11 1-163-003-11 1-126-157-11 1-163-251-11 1-163-009-11 1-163-021-91 1-163-038-00 1-126-382-11 1-163-243-11 1-164-346-11

CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP ELECT ELECT ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP

0.001uF 0.022uF 2.2uF 0.001uF 0.022uF 2.2uF 22uF 220uF 100PF 0.022uF 0.01uF 0.01uF 100PF 100PF 4.7uF

10% 10% 20.00% 10% 10% 20.00% 20% 20.00% 5.00% 10% 10.00% 10.00% 5.00% 5.00% 20.00%

50V 25V 50V 50V 25V 50V 16V 16V 50V 25V 50V 50V 50V 50V 16V 16V 50V 16V 25V 16V

D401 D402 D403 D404 D405 D407 D408 D410

8-719-059-98 8-719-048-87 8-719-200-82 8-719-991-33 8-719-991-33

LED SLR-342VC3F (power) LED SLR-332MGF03 (chg) DIODE 11ES2 DIODE 1SS133T-77 DIODE 1SS133T-77

#1

4

8-719-991-33 DIODE 1SS133T-77 8-719-109-54 DIODE RD2.2ES-B2 8-719-982-11 DIODE MTZJ-4.3B < IC >

IC401 IC402 IC403 IC404 IC405

8-759-998-71 8-759-537-90 8-759-667-59 8-759-679-76 8-759-510-73

IC IC IC IC IC

BA3308F KIA78S05P-TP NJM2035M(TE2) KMP47C101M-1B54 BA10393F-E2

5

#1

C431 C432 C433 C435 C436 C438 C441 C442 C443 C444

10uF 20% 0.0056uF 5% 1uF 0.1uF 10uF 20% 100PF 10uF 0.0056uF 1uF 100PF 100PF 220uF 0.1uF 10uF 100PF 10PF 330P 10uF 100PF 0.001uF 0.01uF 0.1uF 100uF 47PF 1uF

< JACK > J401 J402 J404 1-566-822-21 JACK (B) 1-580-441-61 JACK, PIN 2P (A) 1-785-066-11 JACK,DC(POLARITY UNIFIED TYPE)(DC IN 9V) < JUMPER > JC418 JC419 JC421 JC422 JC423 JC424 JC426 JC427 JC430 JC431 JC470 1-216-295-91 1-216-295-91 1-216-295-91 1-216-296-91 1-216-296-91 1-216-296-91 1-216-296-91 1-216-295-91 1-216-295-91 1-216-295-91 SHORT SHORT SHORT SHORT SHORT SHORT SHORT SHORT SHORT SHORT 0 0 0 0 0 0 0 0 0 0 0

7

#1

5.00% 50V 20% 16V 5% 50V 16V 5.00% 50V 5.00% 50V 20.00% 6.3V 25V 20% 16V 5.00% 50V 0.50PF 50V 50V 20% 16V 5.00% 50V 10% 50V 10.00% 50V 25V 20.00% 16V 5.00% 50V 16V

Ref. No. 1 2 3 * 4

Part No. 3-046-687-01 3-049-800-01 3-046-690-01 A-4542-645-A

Description CABINET (UPPER) CUSHION, ANTENNA TUBE, LIGHT GUIDE TX-BASE BOARD, COMPLETE

Remarks

Ref. No. 5 7 8 #1

Part No. X-3379-302-1 4-984-729-01 3-046-689-01 7-685-105-19

Description CABINET ASSY, LOWER FOOT, RUBBER TERMINAL, CHARGE SCREW +P2X8 TYPE2 NON-SLIT

Remarks

C445 C451 C452 C453 C454 C455 C457 C458 C462 C465 C466 C468 C470 C472 C474

1-216-295-91 SHORT < COIL >

L401 L402 L404 L405 L408

1-414-234-11 1-414-234-11 1-414-234-11 1-414-234-11 1-419-079-21

INDUCTOR CHIP 0uH INDUCTOR CHIP 0uH INDUCTOR CHIP 0uH INDUCTOR CHIP 0uH COIL (MPX FILTER)

11

12

TX-BASERef. No. L409 L410 L413 L414 L415 Part No. 1-419-079-21 1-419-662-31 1-414-234-11 1-414-234-11 1-414-234-11 Description COIL (MPX FILTER) COIL, AIR-CORE INDUCTOR CHIP 0uH INDUCTOR CHIP 0uH INDUCTOR CHIP 0uH < TRANSISTOR > Q401 Q402 Q404 8-729-230-49 TRANSISTOR 8-729-230-49 TRANSISTOR 8-729-045-00 TRANSISTOR < RESISTOR > R401 R403 R404 R406 R407 R408 R411 R413 R414 R416 R417 R418 R421 R422 R423 R424 R425 R426 R427 R428 R429 R430 R431 R432 R433 R434 R438 R440 R441 R442 R446 R447 R448 R449 R451 R452 1-216-085-00 1-216-018-00 1-216-085-00 1-216-085-00 1-216-049-91 1-216-057-00 1-216-085-00 1-216-018-00 1-216-085-00 1-216-085-00 1-216-049-91 1-216-057-00 1-216-097-91 1-216-061-00 1-216-033-00 1-216-133-00 1-216-097-91 1-216-061-00 1-216-033-00 1-216-045-00 1-216-073-00 1-216-073-00 1-216-065-91 1-216-129-00 1-216-081-00 1-216-105-91 1-216-105-91 1-216-049-91 1-216-033-00 1-216-045-00 1-216-051-00 1-216-214-00 1-216-049-91 1-216-081-00 1-216-073-00 1-216-077-00 METAL CHIP METAL CHIP METAL CHIP METAL CHIP RES-CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP RES-CHIP METAL CHIP RES-CHIP METAL CHIP METAL CHIP METAL CHIP RES-CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP RES-CHIP METAL CHIP METAL CHIP RES-CHIP RES-CHIP RES-CHIP METAL CHIP METAL CHIP METAL CHIP RES-CHIP RES-CHIP METAL CHIP METAL CHIP RES-CHIP 33K 51 33K 33K 1K 2.2K 33K 51 33K 33K 1K 2.2K 100K 3.3K 220 3.3M 100K 3.3K 220 680 10K 10K 4.7K 2.2M 22K 220K 220K 1K 220 680 1.2K 4.7K 1K 22K 10K 15K 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/8W 1/10W 1/10W 1/10W 1/10W 2SC2712-YG 2SC2712-YG KTA1266GR-AT Remarks Ref. No. R453 R454 R455 R456 R457 R458 R459 R460 R461 R462 R463 R464 R466 R467 R469 R472 R473 R474 R475 R476 R477 R478 R479 R481 R482 R483 R484 R485 R486 R489 Part No. 1-216-073-00 1-216-073-00 1-216-077-00 1-216-051-00 1-216-214-00 1-216-049-91 1-216-081-00 1-216-086-00 1-216-091-00 1-216-121-91 1-216-085-00 1-216-061-00 1-216-081-00 1-216-065-00 1-216-097-11 1-216-186-00 1-216-049-91 1-216-044-00 1-216-051-00 1-216-051-00 1-216-051-00 1-216-051-00 1-216-051-00 1-216-067-11 1-216-081-00 1-216-081-00 1-216-081-00 1-216-081-00 Description METAL CHIP METAL CHIP RES-CHIP METAL CHIP RES-CHIP RES-CHIP METAL CHIP RES-CHIP METAL CHIP RES-CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP RES-CHIP RES-CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP 10K 10K 15K 1.2K 4.7K 1K 22K 36K 56K 1M 33K 3.3K 22K 4.7K 100K 330 1K 620 1.2K 1.2K 1.2K 1.2K 1.2K 5.6K 22K 22K 22K 22K 22K 18K 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 0.5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% Remarks 1/10W 1/10W 1/10W 1/10W 1/8W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/8W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W

1-216-081-00 METAL CHIP 1-216-079-91 METAL CHIP

< VARIABLE RESISTOR > RV403 1-241-763-11 RES, ADJ, CARBON 4.7K < SWITCH > S401 S402 1-771-961-11 SWITCH, SLIDE (NOISE FILTER) 1-771-962-11 SWITCH, SLIDE (CHANNEL) < VIBRATOR > X401 1-781-850-11 VIBRATOR, CRYSTAL 38kHz *************************************************************

13

TMR-RF845R

Sony Corporation9-927-957-11Audio Entertainment Group

14

2000G1646-1 Printed in Japan 2000.7 Published by PE General Engineering Dept.