COLOR TELEVISION Service Manualdiagramas.diagramasde.com/otros/haier_htx21s31.pdf · 2012-05-03 ·...
Transcript of COLOR TELEVISION Service Manualdiagramas.diagramasde.com/otros/haier_htx21s31.pdf · 2012-05-03 ·...
NO:M-LA-EC-2199-76812 -Edition: 2002.12.30
HTX21S31 COLOR TELEVISION
Service Manual
Haier
Features PAL M/N, NTSC M
Front Audio/Video input V-CHIP, CCD 181 Channel
Haier Group
MODEL: HTX21S31
1
CONTENTS
1 Contents--------------------------------------------------------------------1
2 Product Code illumination and Series Introduction--------------------2
3 Features--------------------------------------------------------------------------------3
4 Safety Precautions------------------------------------------------------------------4
5 Warning and Cautions-------------------------------------------------------------5
6 Net dimension----------------------------------------------------------------------11
7 Parts and Functions--------------------------------------------------------------12
8 Remote Controller Functions--------------------------------------------------13
9 Program Diagram------------------------------------------------------------------14
10 Maintenance Service and Trouble shooting------------------------------15
11 Circuit Diagram---------------------------------------------------------------------18
12 Circuit Explanation----------------------------------------------------------------22
13 Adjustment---------------------------------------------------------------------------24
14 Exploded View----------------------------------------------------------------------27
15 List of Parts--------------------------------------------------------------------------28
16 Damageable Parts List-----------------------------------------------------------41
17 Information of Resistors and Capacitors----------------------------------41
CONTENTS
2
2.Product Code illumination and Series Introduction
H T X 21 S31
Haier
Toshiba
CRT size (unit: inch)
Color television appearance
Product Code illumination and Series Introduction
3
3.Features MODEL HTX21S31
MODEL HTX21S31NO. ITEM FUNCTION
NO. ITEM FUNCTION
1 Main IC 76814 24 Digital curtain 2 CRT Flat square 25 Slow fading on & off 3 Color system NTSC 26 Semitransparent menu 4 Audio system M 27 Non-flashing channel changing 5 Number of channels 181 28 ZOOM 6 OSD language E F S P 29 16:9 mode 7
PICTURE
Multi-picture modes 30 Games 8 AV stereo 31 Calendar 9 Super woofer 32 Child-lock 10 Surrounding sound 33 Multi-functional lock 11 Treble/bass boost 34 No-picture listening 12 Left/right balancer 35 Background light 13 NICAM 36 Auto-timer on 14 Multi-audio modes 37 CCD 15 Tone adjuster 38
SOFTWARE
V-CHIP 16 MTS/SAP 39 Number of built-in speakers 2 17
AUDIO
Auto-volume leveling 40 Audio output power (W) 2 18 AV input Front 1 41 Total power input W 70
19 AV output 42 Voltage range V 90VAC-250V
AC 20 DVD terminal 43 Power frequency Hz 60 21 S-video jack 44 Time of sleep timer (MINS) 120 22 Headphone socket 45 Net weight (KG) 23.5 23
JACK
SCART socket 46 Gross weight (KG) 25
47 Net dimension (MM) 610X475X46
5
48 Packaged dimension (MM) 685X545X52
0 49 Quantity for 20' container
50 Quantity for 40' container
51
PARAMETER
Quantity for 40' high container
Features
4
4. Safety Precautions
SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Many electrical identify these parts and mechanical parts in this chassis have special safety-related characteristics! In the Schematic Diagram and Replacement Parts List.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of the manufacturer.
General Guidance
An Isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents that might result in personal injury caused by electrical shocks.
It will also protect the receiver and it’s components from being damaged by accidental shorts of the circuitry that might be inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown, replace it with a specified one.
When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1W), keep the resistor 10mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Due to the high vacuum and large surface area of the picture tube, extreme care should be taken in handling the Picture Tube. Do not lift the Picture Tube by its Neck.
X-RAY Radiation
Warning:
The source of X-RAY RADIATION in this TV receiver is the High Voltage Section and the Picture Tube.
For continued X-RAY RADIATION protection, the replacement tube must be of the same type as specified in the Replacement Parts List.
Before returning the receiver to the customer,
Always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals, etc., to make sure that the set is safe to operate without any danger of electrical shock.
Safety Precautions
5
5.Warning and Cautions
CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS.
1. When you clean the TV set, please pull out the power plug from AC outlet. Don't clean the cabinet and the screen with benzene, petrol and other chemicals.
4. To prevent the TV set from firing and electric shock, don'tmake the TV set rain or moisture.
2. In order to prolong the using life of the TV set, please place it on a ventilated place.
5. Don't open the back cover, otherwise it is possible to damage the components in the TV set and harm you.
3. Don't place the TV set in the sunshine or near heat source.
6. When the TV set isn't going to be used for long time or it is in thunder and lightening, please pull out the plug from AC outlet and the antenna plug from the cover of the TV set.
Explanation on the display tube
Generally, it is not needed to clean the tube surface. However, if necessary,its surface can be cleaned with a dry cotton cloth after cutting off the power.Don't use any cleanser. If using hard cloth, the tube surface will be damaged.
Warning and Cautions
6
NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions. Remember: Safety First.
General Servicing Precautions
1). Always unplug the receiver AC power cord from the AC power source before:
a. Removing or reinstalling any component, circuit board module or any other assembly of the receiver.
b. Disconnecting or reconnecting any receiver electrical plug or other electrical connection.
c. Connecting a test substitute in parallel with an electrolytic capacitor in the receiver.
CAUTION: A wrong substitution part or incorrect installation polarity of electrolytic capacitors may result in an explosion hazard.
d. Discharging the picture tube anode.
2). Test high voltage only by measuring it with an appropriate high voltage meter or other voltage-measuring device (DVM, FETVOM, etc.) equipped with a suitable high voltage probe. Do not test high voltage by “drawing an arc”.
3) .Discharge the picture tube anode only by (a) first connecting one end of an insulated clip lead to the degaussing or kine aquadag grounding system shield at the point where the picture tube socket ground lead is connected, and then (b) touch the other end of the insulated clip lead to the picture tube anode button, using an insulating handle to avoid personal contact with high voltage.
4) .Do not sprays chemicals on or near this receiver or any of its assemblies.
5). Unless specified otherwise in this service manual, clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or comparable nonabrasive applicator; 10% (by volume) Acetone and 90% (by volume) isopropyl alcohol (90%-99% strength)
CAUTION: This is a flammable mixture.
Unless specified otherwise in this service manual, lubrication of contacts is not required.
6). Do not defeat any plug / socket B+ voltage interlocks with which receivers covered by this service manual might be equipped.
7). Do not apply AC power to this instrument and/or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed.
8) Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead.
Always remove the test receiver ground lead last.
9). Use with this receiver only the test fixtures specified in this service manual.
CAUTION: Do not connect the test fixture ground strap to any heat sink in this receiver.
Electrostatic ally Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such
Warning and Cautions
7
components are usually called Electrostatic ally Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field effect transistors and semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity.
1) Immediately before handling any semiconductor component or semiconductor- equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed to prevent potential shock prior to applying power to the unit under test.
2) After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3) Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4) Use only an anti-static type folder removal device. Some solder removal devices not classified as “anti-static” can generate electrical charges sufficient to damage ES devices.
5) Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6) Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material).
7) Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed.
CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8) Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise even some normally harmless motions such as mutual brushing of your clothes’ fabric or lifting of your foot from a carpeted floor might generate static electricity sufficient to damage an ES device.)
General Soldering Guidelines
1) Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain tip temperature within the range of 500 oF to 600 oF.
2) Use an appropriate gauge of RMA resin-core solder composed of 60 parts tin/40 parts lead.
3) Keep the soldering iron tip clean and well tinned.
4) Thoroughly clean the surfaces to be soldered. Use a mall wire bristle (0.5 inch, or 1.25cm) brush with a metal handle. Do not use freon-propelled spay-on cleaners.
5) Use the following unsoldering technique
a. Allow the soldering iron tip to reach normal temperature. (500 o F to 600o F)
b. Heating the component lead until the solder melts.
c. Quickly draw the melted solder with an anti-static, suction-type solder removal device with solder braid.
Warning and Cautions
8
CAUTION: Work quickly to avoid overheating the circuit board printed foil.
1) Use the following unsoldering technique
a. Allow the soldering iron tip to reach normal temperature. (500 o F to 600o F)
b. First, hold the soldering iron tip and solder the strand against the component lead until the solder melts.
c. Quickly move the soldering iron tip to the junction of the component lead and the printed circuit foil, and hold it there only until the solder flows onto and around both the component lead and the foil.
CAUTION: Work quickly to avoid overheating the circuit board printed foil.
d. Closely inspect the solder area and remove any excess or splashed solder with a small wire-bristle brush.
Remove /Replacement
Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat against the circuit foil. When holes are of slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined.
Removal
Desolder and straighten each IC lead in one operation by gently prying up on the lead with the soldering iron tip as the solder melts.
Draw away the melted solder with an anti-static suction-type solder removal device (or with solder braid) before removing the IC.
Replacement
Carefully insert the replacement IC in the circuit board.
Carefully bend each IC lead against the circuit foil pad and solder it.
Clean the soldered areas with a small wire-bristle brush. (It is not necessary to reapply acrylic coating to the areas).
“Small-Signal” Discrete Transistor Removal/Replacement
Remove the defective transistor by clipping its leads as close as possible to the component body.
Bend into a “U” shape the end of each of three leads remaining on the circuit board.
Bend into a “U” shape the replacement transistor leads.
Connect the replacement transistor leads to the corresponding leads extending from the circuit board and crimp the “U” with long nose pliers to insure metal to metal contact then solder each connection.
Power Output, Transistor Device Removal/Replacement
Heat and remove all solder from around the transistor leads.
Warning and Cautions
9
Remove the heat sink mounting screw (if so equipped).
Carefully remove the transistor from the heat sink of the circuit board.
Insert new transistor in the circuit board.
Solder each transistor lead, and clip off excess lead.
Replace heat sink.
Diode Removal/Replacement
Remove defective diode by clipping its leads as close as possible to diode body.
Bend the two remaining leads perpendicularly to the circuit board.
Observing diode polarity, wrap each lead of the new diode round the corresponding lead on the circuit board.
Securely crimp each connection and solder it.
Inspect (on the circuit board copper side) the solder joints of the two “original” leads. If they are not shiny, reheat them and if necessary, apply additional solder.
Fuse and Conventional Resistor Removal/Replacement
1) Clip each fuse or resistor lead at top of the circuit board hollow stake.
2) Securely crimp the leads of replacement component around notch at stake top.
3) Solder the connections
CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds foil to the circuit board causing the foil to separate from or “lift-off” the board. The following guidelines and procedures should be followed whenever this condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the following procedure to install a jumper wire on the copper pattern side of the circuit board. (Use this technique only on IC connections).
1) Carefully remove the damaged copper pattern with a sharp knife. (Remove only as much copper as absolutely necessary).
2) Carefully scratch away the solder resist and acrylic coating (if used) from the end of the remaining copper pattern.
3) Bend a small “U” in one end of a small gauge jumper wire and carefully crimp it around the IC pin. Solder the IC connection.
4) Route the jumper wire along the path of the out-away copper pattern and let it overlap the previously scraped end of the good copper pattern. Solder the overlapped area and clip off any excess jumper wire.
Warning and Cautions
10
At other connections
Use the following technique to repair the defective copper pattern at connections other than IC Pins. This technique involves the installation of a jumper wire on the component side of the circuit board.
1) Remove the defective copper pattern with a sharp knife.
Remove at least 1/4 inch of copper, to insure that a hazardous condition will not exist if the jumper wire opens.
2) Trace along the copper pattern from both sides of the pattern break and locate the nearest component that is directly connected to the affected copper pattern.
3) Connect insulated 20-gauge jumper wire from the lead of the nearest component on one side of the pattern break to the lead of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so that it does not touch components or sharp edges.
Warning and Cautions
11
6.Net dimension
Haier
Net dimension
12
7.Parts and Functions
HTX21S31 TV1.Fro nt Pa ne l
TV/AV MENU P
8
9
10
1 . C a b le TV A n te n n a H o o ku p
TV Rear Panel1
ANT
1 1
Picture Tube
AV
Left Speaker
TV/AV alteration buttonMenu buttonVolume up/down buttonChannel up/down button
input
Front
11.Right speaker
Audio (R) input Power indicatorPower switch
Parts and Functions
13
8.Remote Controller Functions
1. P ow er B utton2. Tim e & C hannel D isplay B utton3. R ating B utton T V P rogram (V -C hip S etup)4. Last C hannel R ecall B utton5. V olum e(+/-) S elect B utton6. P ersonal P reference S elect7. C hannel(+/-) S elect B utton
8. M enu S elect B utton9. A udio S elect B utton10.D irect A ccess C hannel S elect11. T V /AV Input B utton12. M ute B utton13. S leep Tim er14.S Y S T E M selection
1 2 3
654
7 8 9
0
M EN U RECALL
RATING
C H +
V O L+
C H -
SO UN D
P.S TD
1
2
3
4
5
6
7
8
9
TV/AV D ISP
S Y S
Remote Controller Functions
14
9. Program Diagram
Insert the power plug into the power line socket and insert the antenna plug into the antenna socket on the rear panel. Press down the power switch of the TV set. The red indicator light goes on.
Program preset
A 1). Auto searching and storing program
Press MENU button on the remote controller to call up the “PREST” menu on the screen. Use the “ ” key to select the bar “auto search” then press the “ ” to make sure. If you want to stop, press the key “ ”.
2). Deleting channel number
Press channel up/down buttons to select a channel to skip. Press MENU to call up the “PREST” menu on the screen. Then Press the” “item to select the bar “Add/Delete” then use the “ ” key to select Add or Delete.
B Volume tuning
Press VOLUME buttons VOL- to decrease and VOL+ to increase the volume.
C Personal preference settings
Picture modes
Press P.STD repeatedly to change among Personal, Stadard, Vvivid, Soft to change the Picture Mode.
Program Diagram
15
10.Maintenance service and trouble shooting 1). Adjustment item Explanation:
OSD Explanation Range Remark 0 H.PHASE H.PHASE 0~31 1 NT.H.PHASE H.PHASE 0~31 No used 2 H.BLK.LEFT 0~7 3 H.BLK.RIGHT 0~7 4 V.SIZE Vertical Size 0~127 5 V.LINE Vertical Linearity 0~31 6 V.POSI Vertical DC 0~63 7 V.SC Vertical S-Correction 0~31 8 NT.V.SIZE Vertical Size -32~+31 9 NT.V.LINE Vertical Linearity -16~+15 10 NT.V.POSI Vertical DC -32~+31 11 NT.V.SC Vertical S-Correction -16~+15 12 RF.AGC RF AGC Delay 0~63 13 VOL.OUT Volume Control 0~127 14 OSD H.POSI 0~127 15 OSD V.POSI 0~31 16 INPUT LEVEL 0~15 17 SPECTRAL 0~63 (0~31)PHILIP IC 18 WIDEBAND 0~63 (0~31)PHILIP IC 19 STEREO VCO 0~63 No used 20 FILTER SET 0~63 No used 21 SAP VCO 0~63 No used 2). Setting item explanation:
OSD Function
0 LA76814/LA768
12
0: select LA76814 1:select LA76812
1 SAP IC SELECT 0:TDA9850;1:CXA2104;2:TDA9855;3:UPC1815B
2 SUB.CONT Sub-contrast(0-31)
3 SUB.COLOR Sub-color(0-63)
4 SUB.SHARP Sub-sharpness(0-31)
5 SUB.TINT Sub-tint(0-63)
6 BLK.STR.DEF Black level stretch (0:on; 1:off)
7 AFC GAIN AFC gain (0:low; 1:high)
8 V.SEPUP Vertical synchronize sensitive 0 low;1:high
9 CD.MODE “Count down mode”(LA76814:0/1;LA76812:0-7) 10 DIGITAL OSD Digital OSD setting (0:anlyos 1:digital)
11 OSD CONT. OSD contrast (0-127)/LA76814 (0-3)
12 GRAY MOD Gray mode (0/1)
13 B.GAM.SEL Blue γ select (0-3) 14 RG.GAM.DEF Red green γ define (0/1) 15 FBPBLK.SW FBPBLK.SW (0/1)
16 BRIGHT ABL.TH “Bright.abl.threshold”(0-7) 17 EMG.ABL.DEF “Emg.abl.def”
. Maintenance service and trouble shooting
16
18 BRT.ABL.DEF Brt.Abl.Def (0/1)
19 MID.STP.DEF Mid.Stp.Def (0/1)
20 R—Y/B-Y G.BL R-Y/B-Y Gain Balance (0~15) No use (LA76814)
21 R-Y/B-Y ANG R-Y/B-Y Angle (0~15)
22 C.KILL.OFF C_Kill OFF (0/1)
23 SND.TRAP Sound Trap (0~7)
24 VOL.FIL Volume Filter Defeat
25 VIF.SYS.SW Video IF setting (0 45.75M 1 58.75M) For LA76814
26 VIDEO.LELEVL Video Level (0~7)
27 FM.LEVEL FM Level (0~31)
28 POWER OPT 0 turn TV on twice 1 memory 2或3Turn TV on first
29 POWER FLAG 0 Without OSD power on function 1 With OSD power off function
30 SEARCH CHECK 1 With auto-programmed function turning TV on.
31 SEARCH SPEED 0 Slow search speed 1 Fast search speed
32 AV OPTION 0 without AV 1 one AV input 2 two AV input 3 Three AV input
33 POSITION L/R 0 Logo display on left top of screen
1 Logo display on right top of
screen
34 BLUE BACK 0 No blue background without signal 1 Blue background without
signal
35 BLACK BACK 0 No background changing channel 1 Background changing channel
36 STEREO OPTION 0 No stereo 1 Stereo
37 WOOF/H.PHONE No used No used 38 WOOF VOL.OPT No used No used 39 SENSITIVITY No used No used 40 V.MUTE P.OFF 0 Before POWER OFF, don’t cut off
video input
1 Before POWER OFF, cut off
video input
41 CCD OPTION 0 No CCD 1 CCD
42 V-CHIP OPTION 0 No V-CHIP 1 V-CHIP
43 PASSWORD OPT. 0 No V-CHIP password 1 V-CHIP password
44 COMB.OPTION 0 NOTHING 1 NOTHING
45 TUNER OPTION 0 TDF-3M3 tuner 1 PHILIP UV1336B tuner
46 GAME OPTION 0 No game 1 Game
47 SCREEN OPTION 0:no curtain effect 1: curtain for on effect 2:curtain for off
effect 3:curtain for on/off effect
.Maintenance service and trouble shooting
17
Check to see if Fuse3 is normal
No lig
Abnormal
Check VD501, C507, V513, etc.
Check to see if the collector voltage of V552
is 0V
Check N101 ect
Check to see if , 12v,
5v is normal
Check the control voltage of V552 or
CPU power
The failure of horizontal unit or
N551 N552
Normal
Normal
Normal Abnormal
Check to see 110V 180V etc. voltage is normal
Test to see all terminal Resistance of load
Is normal
Check power unit
Check to see if rectifying tube
is normal
Change rectifying tube
Check the Loader
Abnormal Normal
Abnormal
Normal Abnormal
Normal Abnormal
Maintenance Service and Trouble shooting
18
11. Circuit Diagram
Circuit Diagram
NO:M-LA-EC-2199-76812 -Edition: 2002.12.30
HR76814 1
NTSC-M PAL-M,N
HT-2199(LA76812)
1 1Tuesday, March 12, 2002
Title
Size Document Number Rev
Date: Sheet of
4
FO
H-PULSE
AC110V
8
9
12
HV
Y
K6D
2
1
13
B1-ADJ
CRT BOARD
4
8
3
5
60HZ
10
C
21
ABL
FO
14SCREEN
11
2
LIVE AREA
3
2
2
8
11
2
10
7 1
1
1
1
1
10
3
3 4
5
9
9
3
4
2
4
2
3
R442
R128X
A101UV1336B
IF
33V
5V
5V
SDA
NC
AGC
SCL
R815X
B412V
R6021/6W10K
C406100V0.068U
R4591W1
C45363V1000
C12363V1000
R1091/6W1K
A701HS0038
R7451/6W220
R7201/6W10K
C70116V47
+
R9072W10K
R9001/6W10K
C93116V10
+
V9322SC1815
C4351.6KV7500
XS401SCN-4Y
L432YC0008
L909LJ0107CHA
C5541KV470
R1051/6W100
C41250V1
+
R8321/6W1K
C805X +
R820X
R8051/6W27K
R7501/6W22K
R8031/6W56K
R2321/6W10K
R4021/6W3.3K
R4541/6W3K
R4081/6W2.2K
R2021/6W1.2K
C11163V0.01U
R7541/6W10K
C71350V1
+
R7031/6W4.7K
C70563V18P
B1110V
K9NTJC2-1A
C91363V56P
R9121/6W100
R4345W3.3K
V4322SD1651
C502AC250V0.1U
C444160V4.7
+
C807X
R809X
XS801-1AUDIO
R270J
R6111/6W3.3K
L441Z0449
R8021/6W100
R2421/6W100
R4581/6W1K
VD4011N4148
C20616V47
+
R1131/6W100K
R7591/6W2.2K
R7381/6W4.7K
R7341/6W10K
B3180V
R9281/2W2.7K
C90163V390
R5026W1
R5512WJ47K
C57210V470
+
C13950V0.47+
B1110V
C20850V0.47
+
C60316V100
+
R7271/6W470
R7211/6W10K
R7241/6W4.7K N451
LA7840
GND1
OUTPUT2
VCC13
NON INPUT4
INPUT5
VCC26
PUMP OUT7
C61625V1000
+
C45235V1000
+
C121100V0.022U
C11063V0.01U
R7641/6W22K
C72063V0.01U
R739X
SW703V+
R9161/6W680
W902 JG0034
R5531/6W4.7K
C561160V220
+
R9331/6W1.5K
R1021/6W100K
L20115UH
B75V
R818X
C80316V10+
V6012SA1015R748
1/6W22K
C40416V220+
R4521/6W1
L45118UH
T101HA6019
C11263V0.01U
V1022SC2216
R7511/6W22K
R7011/6W27K
C70363V0.01U
B612V
R9261/6W680
C90363V56
R4911W2.2
XS402TJC2-5A
W405EU2Z
R8211/6W4.7K
VD412HZ7C1
C532AC400V470
R814X
R8111/6W75
B612V
R4091/6W680
N702BR24C04
VCC8
GND7
SCL6
SDA5
1
2
3
4
C40363V0.47U
C80216V10 +
C40850V1
+
C458100V0.033UR457
1/6W39K
C433500V3900
C27616V10
+
C20450V1
+
C11663V0.01U
R7571/6W22K
R7261/6W270K
R7061/6W1.5K
B55V
C93316V1000
+
U901XXXXXXX
C92163V390
C93450V0.47
+
R5011/2W220K
R5561/6W22K
VD5531N4148
B424V
C10263V0.01U
B9023W16OHM
C60416V100
+
SW707POWER
R5671/6W1.2K
C72963V0.01U
C614X
C24563V0.01U
G2014.43
C11963V0.01U
C10116V100
+
R7621/6W22K
R7431/6W3.3K
R7301/6W10K
SW705MENU
C93216V10
+
V9222SC2688
C4362KV470
C434160V10
+
00 0
L501JLB1606
VD503RM11C
RP5512AL2K
C5031KV1000
R4461/4W220K
R4721W1
R1011/6W33K
R4151/6W3.9K
C808X
XS801-2X
R6041/6W4.7K
C40150V0.47
+
C45450V1
+
R1211/6W1K
R1101/6W220
R7471/6W22K
R7081/6W10K
L70139UH
R9172W10K
V9122SC2688
V9022SC2688
TP-GTEST
C5041KV1000P
VD474EU1
VD472EU1
R2441/6W2.7K
R4121/6W8.2K
C8092200
R813X
VD801X
R120J
R8071/6W220
R7521/6W22K
R7281/6W470
R8041/6W82
C23150V1
R4031/6W330K
R4551/6W12K
R432J
R2711K
R2041/6W560K
L10215UH
R7551/6W22K
R7251/6W330
R7041/6W3.9K
B217V
XP901SCN-4Y
C92363V56P
R9221/6W100
R4411/2W1K
FU501T2.5A250V
VD506RM11C
VD505RM11C
V5542SB892
N701LC86F3248A
NOTHING1
NOTHING2
NOTHING3
NOTHING4
NOTHING5
NOTHING6
POWER7
VT8
GND9
XTAL110
XTAL211
VDD12
KEY IN13
AFT IN14
AGC IN15
NC16
RESET17
FILT18
CVBS-IN19
V SYNC20
H SYNC21
R OUT22
G OUT23
B OUT24
BLANK25
I26
SDA027
SCL028
SDA129
SCL130
SAFTY31
S-VHS32
SD33
IR34
SIF35
NOTHING36
NOTHING37
AV238
AV139
AV/TV40
NOTHING41
NOTHING42
R4741W1
R4716W3.9
C474250V22
+
XP601SCN3-2Y
XS802-1VIDEO
B612V
Z101LBN45U
38M
R6121/6W470
C57010V470
+
R613X
R2431/6W270
C45735V1000
+
C441200V0.33U
C207100V0.01
R1141/6W100K
R7601/6W22K
R7401/6W4.7K
R7291/6W150K
SW701CH+
B612V
C9392KV1000
XS901GZS8-6-4F
XS501TJC2-2A
VD504RM11C
C56525V1000
+
C5512KV470
L442101K
R1271/6W330
R7182W10K
R2051/6W22K
R816X
R2721/6W3K
VD6011N4148
VD701BT205-L
R7221/6W1.5K
B9013W16OHM
R461A1/2W120
R4511/6W5.6K
C12263V0.01U
R1081/6W5.6K
R7651/6W22K
R7441/6W220
R737X
R7091/6W390K
SW704V-
R93215K
R93539
R5541/6W150K
C45016V100
+
R1041/6W100
R2031K
B612V
XS802X
R819XR806
1/6W68K
R7351/6W10K
C40750V1
+
C40563V0.01U
R4531/6W12K
VD451EM01Z
R2011/6W1K
R1111/6W82
R7531/6W22K
R7021/6W8.2K
C70463V15P
B75V
R9401/4W33
R9141/6W330
R9021/6W100
B1110V
XP402TJC2-5Y
R5521/2W100K
C82150V1+
RL551G2R-1A
V802X
R8101/6W75
R808X
C45563V10P
VD9211N4148
VD9111N4148
C431X
C40263V0.22U
XS403SCN-5
R8011/6W22K
R2411/6W100
C45650V4.7
+
T431JDT1904
R2731/4W4.7K-J
C20563V0.01U
C11750V1
+
R7581/6W22K
R7361/6W4.7K
R7311/6W10K
B55V
R9081/2W2.7K
C911
63V390
C432500V1000
U902EW0130KB
R5661/6W10K
C5061KV1000P
C501AC250V0.1U
G70132.768K
B75V
C14063V470
B75V
R2061/6W47K
C611100V0.022U
VD9011N4148
R7071/6W680
L431YC0008
R4001/4W270
C61763V0.01U
R2331/2W1.5K
C45135V100 +
C120100V0.022U
C10316V2.2
+
R7631/6W22K
C71916V47
+
R741X
R7331/4W8.2K
SW706X
R9061/6W560
N551AN7812
123
C5051KV1000
N552AN7805 1 2 3
R1031/6W1K
VD411EU1
C13750V0.47
+
R817X
XS802-2X
R6011/6W10K
R7461/6W22K
R7231/6W8.2K
R4011/6W2.2K
C459100V0.1U
B424V
C12663V39
R1071/6W100
R7491/6W22K
R7001/6W10K
C70263V0.01U
B217V
R9272W10K
R9041/6W330
B1110V
TP-HTEST
B612V
R8221/6W1K
V8212SC1815
R4141/6W10K
W807J
R812X
C124100V0.01
+
C80416V470
+
V8012SC1815
B55V
R1191/6W1K
R7561/6W22K
C80116V10 +
T471
JF0501-19129
R4041/6W1.2K
R4601/2W180
R4561/6W12K
R4331/2W1K
C20316V4.7+
C11516V100
+
R7661/6W1K
C71416V2.2
+
R7051/6W2.7K
B55V
XP902SCN-5Y
R9311/6W1K
R9181/2W2.7K
R9241/6W330
R4131/6W10K
L433ZZ0003R562
RSG-I-FF-125V-750mA
R5551/2W47K
C56425V1000
+C472
35V100
+
C41125V47
+
XS601TJC3-2A
C60116V10
+
V7022SA1015
C61216V10
+
R5611/6W10K
C61325V1000+
C24416V47
+
C11863V0.01U
C70850V4.7
+
R7611/6W22K
R7421/6W3.3K
R7321/6W47K
SW702CH-
N553AN7805
123
R5691/2W 1
RT501PTH451A7R0Q21
000
C533AC400VM2200
R5311/2CK5.6M
R5026W1
R5131M
R5141M V553
2SC1815
C507450V150
+ R5152W68K
C5160.022
VD555ES1
VD551RU3A
VD554EU2Z
L503JLB1606
C5150.022
T511BCK-40-58
VD555ES1
L505YC0008
VD512EG01C
L506YC0008
VD510EU2
R5152W68K
R5118.2
VD511EU2
R510 10K
C513470
V5012SA1015
VD509HZ15C
R50910K
C5111000
R5081/6W4.7K
R5071/6W1.5K
VD508 1N4148
C510470
VD9331N4148
C5541KV470
N501HPC922
R5661/6W10KC518
1KV1000
C5132KV330
N706UPC574
VD703HZ4A2
V7032SC1815
VD507IN4148
R506 680
Z201X4.5
V6032SC1815
V5522SC1815
R5040.1
L504YC0008
V7042SC1815
V4312SC2383-O
V7052SC1815
V9312SA1015
N601LA4225A
INPUT1
NON INPUT2
GND3
OUT4
VCC5
VD4021N4148
V803X
V6022SC1815
VD4521Z75
VD561HZ6C3
C27963V0.01U
C27816V47
+ C277100V0.01
R2711/6W150
N101LA76812
AUDIO OUT1
FM OUT2
PIF AGC3
RF AGC4
VIF IN15
VIF IN26
GND(IF)7
VCC (VIF)8
FM FIL9
AFT OUT10
DATA11
CLOCK12
ABL13
R IN14
G IN15
B IN16
BLANK IN17
VCC (RGB)18
R OUT19
G OUT20
B OUT21
AKB IN22
V OUT23
RAMP ALC.FIL24
VCC (H)25
H AFC FIL26
H OUT27
FBP IN28
VCO IREF29
CLOCK OUT30
VCC (CCD)31
OSD CONTRAST32
GND (CCD/H)33
X-RAY34
KILL FLT35
APC2 FIL36
FSC OUT37
XTAL38
APC1 FIL39
SEL VIDEO OUT40
GND (V/C/B)41
EXT VIDEO IN42
VCC (V/C/D)43
INT VIDEO IN44
BLK STRETCH FIL45
VIDEO OUT46
APC FIL47
VCO COIL48
VCO COIL49
VCO FIL50
EXT AUDIO IN51
SIF OUT52
SIF APC FIL53
SIF IN54
C207100V0.01
2
2
8
11
2
10
7 1
1
1
1
3
3 4
5
9
9
3
4
2
4
3
Circuit Diagram
NO:M-LA-EC-2199-76812 -Edition: 2002.12.30
Circuit Block Diagram
Picture/Sound IF Amplifier, Video and audio signal
Processing, RGB Output Circuits and H &V Sync pulse
segregation
SAW
Sound Power Amplifier
Main Processor
Infrared Receiver Remote Controller
ROM
Audio/Video In/Out
Horizontal Scan Output
Vertical Scan Output
CRT
Antenna
Tuner
I2C BUS
Circuit Block Diagram
21
PCB
22
12. Circuit Explanation
IC reference data:
1). N701 (LC86F3232A) Pin No. function voltage V Pin
No. function voltage V
1 n.c 22 R-input 0.06
2 Connect to 5V via a
resistor 5.03 23 G-input 0.06
3 Connect to 5V via a
resistor 5.03 24 B-input 0.07
4 Connect to 5V via a
resistor 5.04 25 Blank 0.15
5 Connect to 5V via a 5.03 26 n.c. 0.01
6 Connect to 5V via a
resistor 5.03 27 I2C bus control 0 4.85
7 standby 0.03 28 I2C bus control 0 4.79
8 n.c. 0 29 I2C bus control 1 5
9 Ground 0 30 I2C bus control 1 4.99
10 Scl 1.47 31 Connect to 5V via a
resistor 5.03
11 sdl 2.2 32 Connect to 5V via a
onnect to 5V via a resisto 5.04
12 Power supply 4.99 33 Connect to 5V via a
resistor 5.03
13 Key input 0.24 34 遥控接收 0.03
14 AFT in 2.77 35 Connect to 5V via a
resistor 5.02
15 AGC in 1.7 36 Connect to 5V via a
resistor 5.01
16 n.c. 1.7 37 mute 0.11
17 Reset 4.99 38 AV select 0.02
18 Filter 3.13 39 Connect to 5V via a
resistor 5.02
19 CVBS in 3.25 40 Connect to 5V via a resist 5.01
20 V syn input 4.8 41 C resistor 5.01
21 H syn input 4.12 42 Connect to 5V via a
resistor 5.02
Circuit Explanation
23
2). N101 LA76812 Pin No. function voltage V Pin
No. function voltage
V 1 Audio output 2.23 28 FBT input 1.06
2 FM output 2.23 29 VCO IREF 1.69
3 IF AGC filter 2.22 30 Clock output 0.002
4 RF AGC 2.59 31 VCC 0.002
5 PIF AMP input 1.30 32 OSD gain control 3.05
6 PIF AMP input 2.83 33 Gnd 0
7 IF ground 2.83 34 X-ray pretect 0.06
8 IF VVcc 0 35 ACC killer filter 0.39
9 FM filter 4.94 36 APC2 filter 3.49
10 AFT output 1.90 37 FSCout 0.54
11 Bus data 2.77 38 XTAL 2.87
12 Bus clock 4.85 39 APC1 filter 3.2
13 ABL 4.76 40 Selected video output 2.43
14 R-input 3.92 41 Video chroma deflection 0
15 G-input 0.14 42 Ext video input 2.55
16 B-input 0.15 43 Power 5
17 Fast blanking input 0.08 44 Int . video input 2.77
18 RGB Vcc 7.94 45 Black stretch filter 2.6
19 R-output 2.21 46 Video input 2.12
20 G-output 2.36 47 APC filter 3.5
21 B-output 2.28 48 VCO coil 4.3
22 H-synchronize output 0 49 VCO coil 4.3
23 Vertical output 2.47 50 FLL filter 2.24
24 Vertical ramp ALC filter 2.65 51 Ext audio input 2.12
25 Power 5.10 52 SIF output 1.95
26 AFC filter 2.49 53 APC filter 2.38
27 Horizontal output 0.63 54 SIF input 3.14
Circuit Explanation
24
13. Adjustment
IF alignment: 1). Test equipment:
a. 45.75MHz sweep generator
b. 15V/3A DC power supply (with short and over current proof)
c. Digital multi-meter d. If alignment tool
f. User Remote controller g. Service remote controller h. Video signal generator i. Multi-system adjustment tool
j. 60MHz double trace oscillograph(2 units) k. White balance adjustment instrument
2). Signal, power supply connection:
a.Connect +15V DC power supply to the +15V testing top in the main PCB.
b.Input sweep signal into IF testing top
c.Connect multi-meter to PIF-TP testing top in PCB.
3). Alignment
a.Connect 45.75MHz sweep generator to IF test top in PCB
b.Adjust T101 and make digital multi-meter display 3.6V±0.05V. (PIF-TP top can only connect to multi-meter).
Alignment and check: a. Connect main PCB with alignment tool, input factory adjustment signal, and turn TV
on. Adjust screen control on FBT and make screen brightness relevant receive 525-line
monoscope, adjust focus control on FBT and make focus relevant.
b. Pre-adjust power voltage: adjust RP551 and make +B voltage be 109V±0.5V. c. Check brightness, contrast, color, and sharpness: receive color bar signal and adjust
contrast, brightness, color, sharpness control, picture will change accordingly.
d. AV input check: press AV/TV button, screen will display AV mode or TV mode and audio
input signal can be observed, picture and sound must be normal.
S optimal.
Adjustment
25
Main power adjustment:
Adjustment: Connect voltage meter to +B on main PCB, make +B voltage be 110V±0.3V.
Screen voltage adjustment:
Adjustment: Tune TV on, receive a digital test pattern, set brightness and contrast standard
mode. Press “FACTORY” button on the service remote controller twice,”B/W balance display on the screen, then press “MUTE” button, and make a horizontal bright line display on the screen. Adjust Screen voltage of FBT, make the line just seen. Then press “MUTE” button and exit service mode. Press “P.STD” button and make picture enter standard mode.
AGC ALIGNMENT: Receive a color bar signal, 60dB,NTSC M color bar pattern, and check if there is noise in the picture, if there is noise, press FACTORY button and enter service mode, adjust RF.AGC value and make the noise just disappear, press FACTORY button and exit service mode.
White balance adjustment: Turn TV on, receive white field signal, and make the probe of white balance adjustment instrument touch with top and bottom of screen fully. Check if values of R, G, B are standard, if not, press “FACTORY” button, make “B/W BALANCE” menu display on screen, adjust values of R-BIA, G-BIA, B-IA, R-DRV, G-DRV, B-DRV, make them standard. Press FACTORY button, exit service mode. OSD I2C bus control (LA76810) Varied range S-BRI Sub brightness 0-127 R-BIA Red bias 0-255 G-BIA Green bias 0-255 B-BIA Blue bias 0-255 R-DRV Red drive 0-127 G-DRV Green drive 0-15 B-DRV Blue drive 0-127 C.B/W Cross B/W 0-3
FOCUS ALIGNMENT Receive crosshatch (N system) pattern; Adjust focus-variable resistor on the FBT, make picture is the sharpest.
Adjustment
26
GEOMETRIC ALIGNMENT: Receive the monochrome circle pattern (NTSC system); Check vertical center and horizontal center and H-linearity .if they are not standard, press FACTORY button to enter service mode, and adjust vertical size, vertical linearity, vertical center, horizontal center, make them standard.
Alignment parameter table: Press FACTORY button on service remote controller and enter service mode: 1.Adjustment mode and2. Setting mode;
Use CH+ or CH- button up/down pages to select items that you need adjust; use
VOL+ or VOL- button
Adjustment