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Teac CTM6845 Service Manual

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SERVICE MANUAL
Brand
TEAC
TEAC
TEAC
TEAC
TEAC
TEAC
TEAC
* 2 types of chassis please check serial number of unit to determine which CCT to use.
SECTION 1 – HAIER CHASSIS
JUN03
Factory
Model
Syber
CT-M6845
Syber
CT-M6845
Syber
CT-M6845
Syber
CT-M6845
Syber
CT-M6845
Haier
CT-M6845
Haier
CT-M6845
CTM6845
Serial no. from
3600001-49
3603121-49
3606085-49
3800001-49
3Y00001-49
3Z00001-49
4200001-49
SECTION 2 – SYBER CHASSIS
68CM CTV
To
3603120-49
3606084-49
3610062-49
3802964-49
3Y02340-49
3Z02592-49
4202340-49
SERVCTM6845

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  • Page 1 SERVICE MANUAL CTM6845 68CM CTV Brand Factory Model Serial no. from TEAC Syber CT-M6845 3600001-49 3603120-49 TEAC Syber CT-M6845 3603121-49 3606084-49 TEAC Syber CT-M6845 3606085-49 3610062-49 TEAC Syber CT-M6845 3800001-49 3802964-49 TEAC Syber CT-M6845 3Y00001-49 3Y02340-49 TEAC Haier CT-M6845 3Z00001-49...
  • Page 2 UOC TDA9373 SERIES COLOUR TELEVISION PUSH PUSH CT-M6845...
  • Page 3 SECTION 1:...

  • Page 4: Table Of Contents

    CONTENTS safety precautions…………………………………………………………………………..……………3 TV block diagram and PHILIPS UOC functional difference between the various IC versions …………….…..…….4 3． Replacement of memory IC………………………………………………………… …………………7 4． Service adjustment………………………………………………………… ………………………...7 5． ICs functional description………………………………………………………………………………9 6． Test point waveform………………………………………………………………………………….…12 7． All ICs/transistors voltages…………………………………………………………………………….13 8． Purity / convergence adjustment……………………………………………………………………..14 9．...
  • Page 5 1.SAFETY PRECAUTIONS (Safety for Electrical Shock Hazard) The design of this product contains special hardware, many circuits and components specially for safety purposes. For After re-assembling the product, always perform an isolation continued protection, no changes should be made to the check on the exposed metal parts of the cabinet (antenna original design unless authorized in writing by the terminals, video/audio input and output terminals, Control...
  • Page 6 2. TV Block diagram TUNER TDA93XX video IF IN Y IN 4052 video RF AGC V IN U IN video TRAP video S-VHS CVBSINT video CHROMA IFVO OUT 24C04 audio CVBS/Y IN ARi2 ARi1 TDA9874 XS303 TDA9859 ALi2 AUDIO OUT RGB OUT ALi1 audio...
  • Page 7 Automatic volume leveling √ √ √ √ √ √ √ √ √ √ √ √ √ Automatic volume leveling or √ √ √ √ √ √ √ √ √ √ √ √ √ Subcarrier output (for comb filter applications) QSS sound IF amplifier with √...

  • Page 9: 3． Replacement Of Memory Ic

    3.REPLACEMENT OF MEMORY IC 1. MEMORY IC. This TV uses memory IC. In the memory IC are memorized data for correctly operating the video and deflection circuits. When replacing memory IC, be sure to use IC written with the initial value of data. 2.
  • Page 10 MENU0 Geometrical adjustment Receive PAL standard Complete pattern signal. Adjustment steps： a) Adjust V. SLOPE, to the center horizontal line just appeare from half bottom shadow. b) Adjust V. SIZE, to get 90% of vertical picture contents would be displayed on CRT. c) Adjust V.
  • Page 11 ARABIC ON/OFF PERSIAN ON/OFF 0~63 TURKISH ON/OFF 0~63 FRANCE ON/OFF RUSSIA ON/OFF 0~63 0~63 SHIPMODE 0~63 SEARCH SPEED 0~63 AGC-TOP 0~63 0~63 AGC-SPEED 0~63 2. TDA9361(1.1) EK cord=NTDA9361-----NF Items Variable Preset Items Variable Preset ON/OFF SUBCON 0~63 ON/OFF SUBCOL 0~63 FMWS ON/OFF SUBSHP...

  • Page 12: 5． Ics Functional Description

    5. ICs functional description UOC TDA93XX SYMBOL DESCRIPTION STAND BY output. In STAND BY mode, high level (Power OFF). For Power ON this pin will be reduced to low. C-bus clock line C-bus data line TUNING tuning Voltage (Vt) PWM output P3.0/NTSC SW Port 3.0 or NTSC output/SCART SW input, Forced NTSC selection, Low-level output, otherwise High output.
  • Page 13 G input / Y input G2/YIN B input / U (B-Y) input / P input B2/UIN BCLIN beam current limiter input BLKIN black current input / V-guard input Red output Green output Blue output VDDA analog supply of Closed Caption decoder and digital supply of TV-processor (3.3 V) OTP Programming Voltage VDDC digital supply to core (3.3 V)

  • Page 14: 6． Test Point Waveform

    LA78040/78045 Function : vertical output Symbol Function Symbol Function INV IN Input V OUT Vertical output VCC1 Power VCC2 Output power supply PUMP UP Pump up power NON INV IN Negative feedback Ground TDA9859 Function : Universal Sound processor Symbol Function Symbol Function...
  • Page 15 7. IC voltages TDA93XX LA76040 15.9 -0.07 AN 7522 TDA9859...

  • Page 16: 8． Purity / Convergence Adjustment

    8. PURITY / CONVERGENCE ADJUSTMENT PURITY ADJUSTMENT WEDGE DEFLECTION Demagnetize CRT with the demagnetizer. YOKE Loosen the retainer screw of the deflection yoke. Remove the wedges. Input a green raster signal from the signal generator, and turn the screen to green raster. Move the deflection yoke backward.
  • Page 17 STATIC CONVERGENCE ADJUSTMENT 1. Input a crosshatch signal. 2. Using 4-pole convergence magnets, overlap the red and blue lines in the center of the screen (Fig. 1) and turn them to magenta (red/blue). (FRONT VIEW) 3. Using 6-pole convergence magnets, overlap the magenta (red/blue) and green lines in the center of the screen and turn them to white.

  • Page 18: 9． List Of Parts

    9. List of Parts NAME TYPE Q'TY REMARK CU-2988（AUSTRALIA） PC BOARD MODULE CRT BOARD MODULE KEY AND REMOTE CONTROL BOARD MODULE PRINTED CIRCUIT BOARD TOUCH SWITCH KFC-A06-21050 TOUCH SWITCH KFC-A06-21050 TOUCH SWITCH KFC-A06-21050 TOUCH SWITCH KFC-A06-21050 TOUCH SWITCH KFC-A06-21050 TOUCH SWITCH KFC-A06-21050 CARBON FILM RESISTOR RT13-1/6W-470Ω-J-T52...
  • Page 19 POWER CABLE POWER SWITCH POWER TRANSMITTING WIRE PACKING ARK MODULE POWER CABLE PLASTIC BAG WIRE 60mm OPERATION INTRODUCTIONS（ENGLISH） TEAC PROPAGANDIZE PAGE POP STATIC FILM （ENGLISH） BATTERY REMOTE CONTROL OPERATION INTRODUCTIONS PLASTIC BAG 29“90 SERIES INTEGER PLASTIC BAG PACKING ARK ENCASEMENT NAIL...
  • Page 20 Mainboard element list r01n r14 r02 TF-0090----1J T451 RCD152K-NACNH 3 1/2W 1.5K R918 R928 R938 RDB100J-NAATD 3 1/6W 10 R312 R801 R871 R301 R302 R363 R365 R366 R381 R382 R383 RDB101J-NAATD 8 1/6W 100 R401 R402 R452 R723 R724 R743 R815 R824 R861 R862 R128...
  • Page 21 RDB473J-NAATD 3 1/6W 47K R172 R732AR745 RDB560J-NAATD 2 1/6W 56 R354 R355 RDB561J-NAATD 1 1/6W 560 R711 RDB562J-NAATD 2 1/6W 5.6K R370 R701 RDB564J-NAATD 1 1/6W 560K R465 RDB680J-NAATD 1 1/6W 68 R304 RDB681J-NAATD 3 1/6W 680 R316 R463 R482 RDB683J-NAATD 1 1/6W 68K R173...
  • Page 22 C445 C513 C732 C803 C805 C812 CKF471K1BA-FC 8 50V470P C814 C824 C826 CKF472K1BA-FC 2 50V4700P C324 C336 CKF561K1BA-FC 1 50V560P C381 CKF821K1BA-FC 1 50V820P C323 CKMX102M301ND 1 AC400V1000P C515 CKMX471K301ND 2 AC400V470P C515AC598 CKP101K1BA-FC 1 500V100P C482 CKP102K1BA-FC 1 500V1000P C452 CKP221K1BA-NC 1 500V220P...
  • Page 23 CFG333K1-H-NW 3 100V0.033u C403 C510 C544 CFG473K1-H-NW 1 100V0.047u C443 CFG562J1-H-NW 2 100V5600P C154 C158 CMLX224M901NE 1 AC300V0.22u M C501 CMM434J8-H-NL 1 400V0.43u C467 CMR103J5-H-NE 1 630V0.01u C508 CMZ822J7-H-NE 1 1.6KV8200p C455 CMZ912J7-H-NE 1 1.6KV9100P C456 LAD601K2---NJ 1 LGB-600uH(1.5A) L441 LBB100K----TG 5 10uH-K L331 L361 L751 L752 L753...
  • Page 24 NTDA9373---N- 1 TDA9373 N301 Q2PA1015-GNF- 1 2PA1015G V171 V121 V122 V173 V351 V352 V395 Q2PC1815-GNF- 8 2PC1815 G V504 V801 Q2SB1443--NN- 1 2SB1443 TV2 Q V542 Q2SD1886C-NN- 1 2SD1886C V451 QBF421----NN- 3 BF421 V913 V923 V933 QBF422----NN- 3 BF422 V912 V922 V932 QIRFS630A-NN- 1 IRFS630A V432...
  • Page 25 zz152 PX20028----2C 1 MAIN+CRTPCB zz060 SCA-25012FE-H 1 GB818 M2.5*12 SN401 SFAC30010FE1H 3 SJ2836-87(M3*10.I) SN503 SN161ASN161B SFAC30012FE1H 2 SJ2836-87(M3*12.I) S-N501 S-V451 SKA-308R0FE-H 2 GB845-78 ST3*8 S-N505 S-V432 SXN1A25--FF-H 1 M2.5 NUT zz360 SXN1A30--FF-H 5 M3(NUT) N-N501 N-N503 N-V451 NN161ANN161B SXW1A25--FE-H 1 GB97.1 D2.5 FLATWASHIER ZN401...
  • Page 26 R217 R218 R246 R210 C2688/BF422 V202 C2688/BF422 V210 V201 SW707 SW706 SW705 SW704 SW703 SW702 V211 +3.3V BF422 R237 BF422 R219 XS201 +5V-1 CON6 R726 CP701 V205 V210 Vol.+ Vol.- Prog.+ Prog. - Menu AV/TV BF423 BF423 HS0038 3.3K R220 R221 R222 R238...
  • Page 27 UOC TDA9373 SERIES COLOUR TELEVISION PUSH PUSH CT-M6845...
  • Page 28 CONTENTS safety precautions…………………………………………………………………………..……………3 TV block diagram and PHILIPS UOC functional difference between the various IC versions …………….…..…….4 3． Replacement of memory IC………………………………………………………… …………………7 4． Service adjustment………………………………………………………… ………………………...7 5． ICs functional description………………………………………………………………………………9 6． Test point waveform………………………………………………………………………………….…12 7． All ICs/transistors voltages…………………………………………………………………………….13 8． Purity / convergence adjustment……………………………………………………………………..14 9．...
  • Page 29 1.SAFETY PRECAUTIONS 10. Isolation Check The design of this product contains special hardware, many (Safety for Electrical Shock Hazard) circuits and components specially for safety purposes. For continued protection, no changes should be made to the After re-assembling the product, always perform an isolation original design unless authorized in writing by the check on the exposed metal parts of the cabinet (antenna manufacturer.
  • Page 30 2. TV Block diagram TUNER TDA93XX video IF IN Y IN 4052 video RF AGC V IN U IN video TRAP video S-VHS CVBSINT video CHROMA IFVO OUT 24C04 audio CVBS/Y IN ARi2 ARi1 TDA9874 XS303 TDA9859 ALi2 AUDIO OUT RGB OUT ALi1 audio...
  • Page 31 Automatic volume leveling √ √ √ √ √ √ √ √ √ √ √ √ √ Automatic volume leveling or √ √ √ √ √ √ √ √ √ √ √ √ √ Subcarrier output (for comb filter applications) QSS sound IF amplifier with √...

  • Page 33: 3． Replacement Of Memory Ic

    3.REPLACEMENT OF MEMORY IC 1. MEMORY IC. This TV uses memory IC. In the memory IC are memorized data for correctly operating the video and deflection circuits. When replacing memory IC, be sure to use IC written with the initial value of data. 2.
  • Page 34 MENU0 Geometrical adjustment Receive PAL standard Complete pattern signal. Adjustment steps ： a) Adjust V. SLOPE, to the center horizontal line just appeare from half bottom shadow. b) Adjust V. SIZE, to get 90% of vertical picture contents would be displayed on CRT. c) Adjust V.
  • Page 35 ENGLISH ON/OFF HSHIFT 0~63 ARABIC ON/OFF PERSIAN ON/OFF 0~63 TURKISH ON/OFF 0~63 FRANCE ON/OFF RUSSIA ON/OFF 0~63 0~63 SHIPMODE 0~63 SEARCH SPEED 0~63 AGC-TOP 0~63 0~63 AGC-SPEED 0~63 2. TDA9361(1.1) EK cord=NTDA9361-----NF Items Variable Preset Items Variable Preset ON/OFF SUBCON 0~63 ON/OFF SUBCOL...

  • Page 36: 5． Ics Functional Description

    5. ICs functional description UOC TDA93XX SYMBOL DESCRIPTION STAND BY output. In STAND BY mode, high level (Power OFF). For Power ON this pin will be reduced to low. C-bus clock line C-bus data line TUNING tuning Voltage (Vt) PWM output P3.0/NTSC SW Port 3.0 or NTSC output/SCART SW input, Forced NTSC selection, Low-level output, otherwise High output.
  • Page 37 RGB / YUV insertion input INSSW2 R input / V (R-Y) input / P input R2/VIN G2/YIN G input / Y input B2/UIN B input / U (B-Y) input / P input BCLIN beam current limiter input black current input / V-guard input BLKIN Red output Green output...

  • Page 38: 6． Test Point Waveform

    In 1 Ch 1 input Out 2 (+) Ch 2 output (+) Note: AN7523 is pin 1 to 9, AN7522 is pin 1 to 12. LA78040/78045 Function : vertical output Symbol Function Symbol Function INV IN Input V OUT Vertical output VCC1 Power VCC2...
  • Page 39 7. IC voltages TDA93XX LA76040 15.9 -0.07 AN 7522 TDA9859...

  • Page 40: 8． Purity / Convergence Adjustment

    8. PURITY / CONVERGENCE ADJUSTMENT PURITY ADJUSTMENT WEDGE DEFLECTION Demagnetize CRT with the demagnetizer. YOKE Loosen the retainer screw of the deflection yoke. Remove the wedges. Input a green raster signal from the signal generator, and turn the screen to green raster. Move the deflection yoke backward.
  • Page 41 STATIC CONVERGENCE ADJUSTMENT 1. Input a crosshatch signal. 2. Using 4-pole convergence magnets, overlap the red and blue lines in the center of the screen (Fig. 1) and turn them to magenta (red/blue). (FRONT VIEW) 3. Using 6-pole convergence magnets, overlap the magenta (red/blue) and green lines in the center of the screen and turn them to white.

  • Page 42: 9． List Of Parts

    9. List of Parts NAME TYPE Q'TY REMARK CU-2988（AUSTRALIA） PC BOARD MODULE CRT BOARD MODULE KEY AND REMOTE CONTROL BOARD MODULE PRINTED CIRCUIT BOARD TOUCH SWITCH KFC-A06-21050 TOUCH SWITCH KFC-A06-21050 TOUCH SWITCH KFC-A06-21050 TOUCH SWITCH KFC-A06-21050 TOUCH SWITCH KFC-A06-21050 TOUCH SWITCH KFC-A06-21050 CARBON FILM RESISTOR RT13-1/6W-470Ω-J-T52...
  • Page 43 POWER CABLE POWER SWITCH POWER TRANSMITTING WIRE PACKING ARK MODULE POWER CABLE PLASTIC BAG WIRE 60mm OPERATION INTRODUCTIONS（ENGLISH） TEAC PROPAGANDIZE PAGE POP STATIC FILM （ENGLISH） BATTERY REMOTE CONTROL OPERATION INTRODUCTIONS PLASTIC BAG 29“90 SERIES INTEGER PLASTIC BAG PACKING ARK ENCASEMENT NAIL...
  • Page 44 Mainboard element list r01n r14 r02 TF-0090----1J T451 RCD152K-NACNH 3 1/2W 1.5K R918 R928 R938 RDB100J-NAATD 3 1/6W 10 R312 R801 R871 R301 R302 R363 R365 R366 R381 RDB101J-NAATD 8 1/6W 100 R382 R383 R401 R402 R452 R723 R724 R743 R815 R824 R861 R862 R128...
  • Page 45 RDB473J-NAATD 3 1/6W 47K R172 R732AR745 RDB560J-NAATD 2 1/6W 56 R354 R355 RDB561J-NAATD 1 1/6W 560 R711 RDB562J-NAATD 2 1/6W 5.6K R370 R701 RDB564J-NAATD 1 1/6W 560K R465 RDB680J-NAATD 1 1/6W 68 R304 RDB681J-NAATD 3 1/6W 680 R316 R463 R482 RDB683J-NAATD 1 1/6W 68K R173...
  • Page 46 C445 C513 C732 C803 C805 C812 CKF471K1BA-FC 8 50V470P C814 C824 C826 CKF472K1BA-FC 2 50V4700P C324 C336 CKF561K1BA-FC 1 50V560P C381 CKF821K1BA-FC 1 50V820P C323 CKMX102M301ND 1 AC400V1000P C515 CKMX471K301ND 2 AC400V470P C515AC598 CKP101K1BA-FC 1 500V100P C482 CKP102K1BA-FC 1 500V1000P C452 CKP221K1BA-NC 1 500V220P...
  • Page 47 CFG333K1-H-NW 3 100V0.033u C403 C510 C544 CFG473K1-H-NW 1 100V0.047u C443 CFG562J1-H-NW 2 100V5600P C154 C158 CMLX224M901NE 1 AC300V0.22u M C501 CMM434J8-H-NL 1 400V0.43u C467 CMR103J5-H-NE 1 630V0.01u C508 CMZ822J7-H-NE 1 1.6KV8200p C455 CMZ912J7-H-NE 1 1.6KV9100P C456 LAD601K2---NJ 1 LGB-600uH(1.5A) L441 LBB100K----TG 5 10uH-K L331 L361 L751 L752 L753...
  • Page 48 NTDA9373---N- 1 TDA9373 N301 Q2PA1015-GNF- 1 2PA1015G V171 V121 V122 V173 V351 V352 V395 Q2PC1815-GNF- 8 2PC1815 G V504 V801 Q2SB1443--NN- 1 2SB1443 TV2 Q V542 Q2SD1886C-NN- 1 2SD1886C V451 QBF421----NN- 3 BF421 V913 V923 V933 QBF422----NN- 3 BF422 V912 V922 V932 QIRFS630A-NN- 1 IRFS630A V432...
  • Page 49 zz152 PX20028----2C 1 MAIN+CRTPCB zz060 SCA-25012FE-H 1 GB818 M2.5*12 SN401 SFAC30010FE1H 3 SJ2836-87(M3*10.I) SN503 SN161ASN161B SFAC30012FE1H 2 SJ2836-87(M3*12.I) S-N501 S-V451 SKA-308R0FE-H 2 GB845-78 ST3*8 S-N505 S-V432 SXN1A25--FF-H 1 M2.5 NUT zz360 SXN1A30--FF-H 5 M3(NUT) N-N501 N-N503 N-V451 NN161ANN161B SXW1A25--FE-H 1 GB97.1 D2.5 FLATWASHIER ZN401...
  • Page 52 SECTION 2:...
  • Page 53 COLOUR TV SERVICE MANUAL 彩 电 维 修 手 册 OM8838/TDA8842 Multi-System Chassis OM8838/TDA8842 多制式彩电机芯 目录 Contents 电器规格…………………… Electrical Specification……………………… 2 面板控制图………………… Panel Diagram……………………………… 2 遥控器图…………………… Remote Controller Diagram………………… 3 集成电路介绍……………… ICs Introduction…………………………… 4 调试说明…………………… 10 Description of Adjustment………………… 10 更换部件一览表……………...
  • Page 54 Overall Configuration: In this chassis, the single-chip IC OM8838/TDA8842 for color TV small signal processing with I C bus control of the Phillips is used. It can be used on all models from 14” to 29”. It has a number of expansion functions, and a series of color TV sets, from simple to high grade and of a number of systems, such as PAL, NTSC and SECAM can be made on a single PCB master board Specification...
  • Page 55 Rear view diagram ⑧AV IN sockets ⑧ Antenna input and AV IN/OUT sockets Remote controller diagram CALL SLEEP CLEAR FEATURE PICTURE PRESET MUTE SOUND - 3 -...
  • Page 56 一. Introduction to IC’s 1. TDA8842 (OM8838) multi-system small signal processing IC TDA8842 (OM8838) is the new type Video/Chroma/Deflection (V/C/D) processing chip developed by the Phillips in 1998, i.e., the Video/Chroma/Deflection small signal processing IC. By fully adopting the I C bus control technique and integrating a number of unique circuits into the chip, it has greatly simplified the elements external to the IC and achieved overall improvement in the picture and sound quality of the popular model color TV sets.
  • Page 57 This unit circuit consists of four sections, i.e., vertical serrated wave generator, vertical geometric correction processor, horizontal (E-W) geometric correction processor, EHT follow-up and over-voltage protection circuit, as detailed in Fig. 5. Filter CVBS/Y/C switching unit circuit The filter CVBS/Y/C switching unit circuit has such main functions: selective filtering correction for input composite video signal CVBSINT, output composite video signal CVB-SEXT, CVB/Y and chroma signal C;...
  • Page 58 Pin ① Tuning voltage output (functioning only to VST tuner, and it has no output when the IIC bus has identified the presence of a FST tuner.) Pin ② left channel volume control output Pin ③ right channel volume control output (Note: Pins ② and ③ have PWM output only when there is no output from IIC) Pin ④...
  • Page 59 Ground Pins are respectively for B,G,R screen character display output (Note: the 23 24 blue background in this machine is produced inside OM8838) blanking signal output horizontal synchronization signal input (positive polarity) vertical synchronization signal input (positive polarity) ground not used in this machine Pins 12MHz reset...
  • Page 60 input serial data 4.85 4.85 input and output Bandgap 6.67 12.5 decoupling DHROMA Chroma input 1.12 1.12 CVBA/Y External CVBS/Y 3.35 3.35 input Main power supply 7.80 7.80 voltage (+8V) CVBSY Internal CVBS 3.35 3.35 input GND1 Ground1 AUDIOUT Audio interface 2.98 2.98 Internal connection 0...
  • Page 61 connection port Loop filter phase 4.31 detector Second supply 7.83 voltage (+8V) CVBSIO CVBS-1 output 2.46 3.54 DECDIG Digital supply end 4.91 decoupling H OUT Horizontal output 0.41 0.41 FBISO Flyback input/ 0.56 0.77 sandcastle output PH2LF Phase 2 filter 3.41 3.44 13.5...
  • Page 62 Pins Sound signal output (11 as positive and 13 as negative) 11 13 Ground TDA7056 (mono) Pin No. Function Blank Pin ① Sound working power supply (+14V-16V) Pin ② Audio signal input Pin ③ Ground Pin ④ Sound volume DC level control Pin ⑤...
  • Page 63 Video amplification voltage (+180V) Pin ⑨ Blank Pin ⑩ [8] Video switch HEF4053 Three sets of SPDT switches Output 1 ① ③ ⒀ 1IN1(1) 2IN1(0) 3IN1(1) ④ ② ⑤ ⑿ 1IN2(0) 2IN2(1) 3IN2(0) ⑨-- Control pin Control pin Control pin +5V power supply Pins ⑥⑦⑧...
  • Page 64 *V-ZOOM: set value 25 *V-SCORLL: set value 31 Note: The vertical adjustment for PAL system signal and NTSC system signal should be adjusted separately. Press the “Maintenance” key three times to enter the third menu under factory status, which gives the following display: Remarks: MTV880C.
  • Page 65 Press the “Maintenance” key six times to enter the sixth menu, which gives the following display: Remarks: MTV880C. No item in this menu will function in the adjustment of this Y-CTI-DELAY 4 chassis. ADAP. BLACK 32 0-63 LUM. LINER 32 0-63 GAMMA 32 0-63 PEARING...
  • Page 66 Press the “Maintenance” key nine times to enter the ninth menu, which gives the following display: Remarks: OPTION2 * AV1: set value 1 *AV2: set value 1 (0 for one channel of AV input) *AV3: set value 0 *SVHS: set value 1 (0 for 21” and 14”) SVHS *UI MODE: set value 2 UI MODE...
  • Page 67 white balance is classified as “dark white balance” and “bright white balance”. Dark white balance means the white balance when the screen is in dark condition because of high cathode voltage of the electron gun and low electron beam current, it corresponds to the color cast resulted from different electron flow cut-off characteristics of the beams from three guns, therefore dark white balance adjustment is actually an adjustment of the static bias voltage of the video amplifier.
  • Page 68 ② Main points in color cast and retrace fault repair in 8838/8842 series color TV The traditional method to repair a color cast fault in color TV is to adjust the saturation, then observe if the picture turns to black and white after cutting off the saturation. If so, the fault is in the video amplification circuit or there is color cast in the CRT.
  • Page 69 OM8838/TDA8842 series color TV sets rely more on the “soft start and slow stop” function set inside the IC chip and the “automatic fault diagnosis” or logic protection function on some ports to realize protection for the circuit. In case of a fault in horizontal scanning, vertical scanning and video amplification circuits, the whole machine will be in the faulty status of “three no’s”...
  • Page 70 3. Quick checklist for common faults in TDA8842/OM8838 series color TV sets: Fault symptom Faulty unit circuit Faulty element Three no’s, the indicator Power supply Fuse F801 damaged, and resistor R802 is not ON section damaged Three no’s, the indicator Power supply Fuse F801 damaged, and diodes D801, D802,...
  • Page 71 Parts No. Description Qty Location 03000000 PARTS E9680030 GROUND LINE DISCRETENESS F6470290 POWER WIRE 04000000 PART G0610760 RADIATING PIN(5V,8V) G0610760 RADIATING PIN(5V,8V) RADIATING PIN(CUSION) G0610790 G0610840 RADIATING PIN(12V) G0611140 RADIATING PIN(H.) G0611150 RADIATING PIN(R.) G0611160 RADIATING PIN(SOUND) G0611240 RADIATING PIN(POWER) G3600010 ISINGLASS PARCEL G7310000...
  • Page 72 J1010008 SCREW ST3×8C J3060001 RIVET 1.6×2.8 J3060002 RIVET 2.5×3.5 10000000 RESISTOR RT13-1/6W-10Ω±5% 11000000 R121 RT13-1/6W-10Ω±5% 11000000 R537 RT13-1/6W-22Ω±5% 12200000 R109 RT13-1/6W-47Ω±5% 14700000 R523 RT13-1/6W-47Ω±5% 14700000 R526 RT13-1/6W-47Ω±5% 14700000 R536 RT13-1/6W-47Ω±5% 14700000 R632 RT13-1/6W-68Ω±5% 16800000 R123 RT13-1/6W-82Ω±5% 18200000 R002 RT13-1/6W-82Ω±5% 18200000 R007 RT13-1/6W-82Ω±5% 18200000...
  • Page 73 RT13-1/6W-330Ω±5% 13301000 R015 RT13-1/6W-330Ω±5% 13301000 R507 RT13-1/6W-330Ω±5% 13301000 R508 RT13-1/6W-330Ω±5% 13301000 R729 RT13-1/6W-390Ω±5% 13901000 R502 RT13-1/6W-390Ω±5% 13901000 R516 RT13-1/6W-470Ω±5% 14701000 R110 RT13-1/6W-470Ω±5% 14701000 R513 RT13-1/6W-470Ω±5% 14701000 R518 RT13-1/6W-470Ω±5% 14701000 R732 RT13-1/6W-470Ω±5% 14701000 R735 RT13-1/6W-470Ω±5% 14701000 R736 RT13-1/6W-470Ω±5% 14701000 R737 RT13-1/6W-680Ω±5% 16801000 R417 RT13-1/6W-680Ω±5%...
  • Page 74 RT13-1/6W-1.8KΩ±5% 11802000 R519 RT13-1/6W-1.8KΩ±5% 11802000 R534 RT13-1/6W-1.8KΩ±5% 11802000 R620 RT13-1/6W-1.8KΩ±5% 11802000 R621 RT13-1/6W-1.8KΩ±5% 11802000 R628 RT13-1/6W-1.8KΩ±5% 11802000 R629 RT13-1/6W-2.2KΩ±5% 12202000 R522 RT13-1/6W-2.2KΩ±5% 12202000 R702 RT13-1/6W-2.2KΩ±5% 12202000 R837 RT13-1/6W-2.7KΩ±5% 12702000 R455 RT13-1/6W-3KΩ±5% 13002000 R481 RT13-1/6W-3KΩ±5% 13002000 R720 RT13-1/6W-3.3KΩ±5% 13302000 R509 RT13-1/6W-3.3KΩ±5% 13302000 R758 RT13-1/6W-3.3KΩ±5%...
  • Page 75 RT13-1/6W-6.8KΩ±5% 16802000 R718 RT13-1/6W-6.8KΩ±5% 16802000 R750 RT13-1/6W-6.8KΩ±5% 16802000 R752 RT13-1/6W-6.8KΩ±5% 16802000 R753 RT13-1/6W-6.8KΩ±5% 16802000 R755 RT13-1/6W-6.8KΩ±5% 16802000 R782 RT13-1/6W-10KΩ±5% 11003000 R317 RT13-1/6W-10KΩ±5% 11003000 R421 RT13-1/6W-10KΩ±5% 11003000 R450 RT13-1/6W-10KΩ±5% 11003000 R465 RT13-1/6W-10KΩ±5% 11003000 R501 RT13-1/6W-10KΩ±5% 11003000 R506 RT13-1/6W-10KΩ±5% 11003000 R510 RT13-1/6W-10KΩ±5% 11003000 R511 RT13-1/6W-10KΩ±5%...
  • Page 76 RT13-1/6W-22KΩ±5% 12203000 R320 RT13-1/6W-22KΩ±5% 12203000 R738 RT13-1/6W-27KΩ±5% 12703000 R915 RT13-1/6W-33KΩ±5% 13303000 R504 RT13-1/6W-33KΩ±5% 13303000 R532 RT13-1/6W-33KΩ±5% 13303000 R723 RT13-1/6W-33KΩ±5% 13303000 R724 RT13-1/6W-39KΩ±5% 13903000 R478 RT13-1/6W-39KΩ±5% 13903000 R725 RT13-1/6W-47KΩ±5% 14703000 R001 RT13-1/6W-47KΩ±5% 14703000 R005 RT13-1/6W-47KΩ±5% 14703000 R006 RT13-1/6W-47KΩ±5% 14703000 R608 RT13-1/6W-47KΩ±5% 14703000 R612 RT13-1/6W-47KΩ±5%...
  • Page 77 RT14-1/4W-2.7Ω±5% 12707001 R309 RT14-1/4W-22Ω±5% 12200001 R815 RT14-1/4W-47Ω±5% 14700001 R219 RT14-1/4W-47Ω±5% 14700001 R222 RT14-1/4W-47Ω±5% 14700001 R227 RT14-1/4W-47Ω±5% 14700001 R236 RT14-1/4W-47Ω±5% 14700001 R237 RT14-1/4W-47Ω±5% 14700001 R240 RT14-1/4W-100Ω±5% 11001001 R402 RT14-1/4W-220Ω±5% 12201001 R218 RT14-1/4W-220Ω±5% 12201001 R235 RT14-1/4W-220Ω±5% 12201001 R246 RT14-1/4W-330Ω±5% 13301001 R221 RT14-1/4W-330Ω±5% 13301001 R225 RT14-1/4W-330Ω±5%...
  • Page 78 RT14-1/4W-22KΩ±5% 12203001 R817 RT14-1/4W-22KΩ±5% 12203001 R845 RT14-1/4W-100KΩ±5% 11004001 R303 RT14-1/4W-150KΩ±5% 11504001 R825 RT15S-1/2W-82Ω±5% 18200003 R410 RT15S-1/2W-1KΩ±5% 11002003 R422 RT15-1/2W-47KΩ±5% 14703002 R839 RT15-1/2W-120KΩ±5% 11204002 R808 RT15-1/2W-120KΩ±5% 11204002 R809 RT15-1/2W-220KΩ±5% 12204002 R801 RT15-1/2W-220KΩ±5% 12204002 MZ73-18RM270 11800451 RT801 RF10-1W-0.47Ω±10% 14708207 R209 RF10-1W-0.47Ω±10% 14708207 R490 RF10-1W-2.2Ω±10% 12207207...
  • Page 79 RY26-1W-1KΩ±5% 11002103 R415 RY26-1W-4.7KΩ±5% 14702103 R426 RY27-2W-100Ω±5% 11001104 R416 RY27-2W-150Ω±5% 11501104 R310 RY27-2W-150Ω±5% 11501104 R407 RY27-2W-12KΩ±5% 11203104 R772 RY27-2W-15KΩ±5% 11503104 R210 RY27-2W-15KΩ±5% 11503104 R217 RY27-2W-15KΩ±5% 11503104 R232 RY17-2W-56Ω±5% 15600102 R811 RY17-2W-12KΩ±5% 11203102 R821 RJ24-1/4W-39KΩ±1% 13903603 R530 RJ24-1/4W-3KΩ±1% 13002603 R302 RJ15-1/2W-100KΩ±2% 11004601 R822 RX27-3-5-5W-1.8Ω±10%...
  • Page 80 21001006 CC1-08-63V-100pF±5%-CH C702 21001006 CC1-08-63V-100pF±5%-CH C705 21001006 CC1-08-63V-100pF±5%-CH C706 21001006 CC1-08-63V-100pF±5%-CH C707 21001006 CC1-08-63V-100pF±5%-CH C708 21001006 CC1-08-63V-100pF±5%-CH C723 21001006 CC1-08-63V-100pF±5%-CH C724 22201335 CT1-06-63V-220pF±10%-2B4 C206 22701335 CT1-06-63V-270pF±10%-2B4 C207 23901335 CT1-06-63V-390pF±10%-2B4 C208 21002335 CT1-06-63V-1000pF±10%-2B4 C301 21002335 CT1-06-63V-1000pF±10%-2B4 C302 21002335 CT1-06-63V-1000pF±10%-2B4 C503 21002335 CT1-06-63V-1000pF±10%-2B4 C511 21002335...
  • Page 81 CT1-08-63V-0.022μF±10%-2F4 22203339 C906 CT1-08-63V-0.022μF±10%-2F4 22203339 C915 22201313 CT1-06-500V-220pF±10%-2B4 C405 22701313 CT1-06-500V-270pF±10%-2B4 C426 24701313 CT1-06-500V-470pF±10%-2B4 C412 23902314 CT1-12-500V-3900pF±10%-2B4 C402 21002313 CT1-06-500V-1000pF±10%-2B4 C460 24701424 CT81-08-1KV-470pF±10%-2B4 C821 24701424 CT81-08-1KV-470pF±10%-2B4 C825 24701424 CT81-08-1KV-470pF±10%-2B4 C832 24701424 CT81-08-1KV-470pF±10%-2B4 C836 21002424 CT81-08-1KV-1000pF±10%-2B4 C806 21002424 CT81-08-1KV-1000pF±10%-2B4 C807 21002424 CT81-08-1KV-1000pF±10%-2B4 C808 21002424...
  • Page 82 23302201 CL11-100V-3300pF±10% C529 23302201 CL11-100V-3300pF±10% C911 24702220 CL11-100V-4700pF±5% C812 CL11-100V-0.01μ±10% 21003201 C333 CL11-100V-0.015μF±10% 21503201 C819 CL11-63V-0.1μF±5% 21004206 C420 CL11-63V-0.1μF±5% 21004206 C505 CL11-63V-0.1μF±5% 21004206 C519 CL11-63V-0.1μF±5% 21004206 C532 CL11-63V-0.1μF±5% 21004206 C540 CL11-63V-0.1μF±5% 21004206 C627 CL11-63V-0.1μF±5% 21004206 C630 CL11-63V-0.1μF±5% 21004206 C815 CL11-63V-0.1μF±5% 21004206 C910 CL21X-50V-0.1μF±10%...
  • Page 83 CD110-16V-4.7μF±20% 24705104 C736 CD110-16V-4.7μF±20% 24705104 C105 CD110-16V-4.7μF±20% 24705104 C106 CD110-16V-4.7μF±20% 24705104 C107 CD110-16V-10μF±20% 21006104 C108 CD110-16V-10μF±20% 21006104 C517 CD110-16V-10μF±20% 21006104 C528 CD110-16V-10μF±20% 21006104 C624 CD110-16V-10μF±20% 21006104 C847 CD110-16V-10μF±20% 21006104 CD110-16V-47μF±20% 24706104 C506 CD110-16V-47μF±20% 24706104 C523 CD110-16V-100μF±20% 21007104 C118 CD110-16V-100μF±20% 21007104 C452 CD110-16V-100μF±20% 21007104...
  • Page 84 CD110-25V-1000μF±20% 21008105 C617 CD110-35V-22μF±20% 22206106 C848 CD110-35V-47μF±20% 24706106 C401 CD110-35V-47μF±20% 24706106 C450 CD110-35V-330μF±20% 23307106 C826 CD110-50V-1μF±20% 21005107 C516 CD110-50V-1μF±20% 21005107 C520 CD110-50V-1μF±20% 21005107 C536 CD110-50V-1μF±20% 21005107 C717 CD110-50V-1μF±20% 21005107 C907 CD110-50V-1μF±20% 21005107 C909 CD110-50V-10μF±20% 21006107 C451 CD110-50V-10μF±20% 21006107 C703 CD110-50V-22μF±20% 22206107 C306 CD110-50V-100μF±20%...
  • Page 85 LGA0307-6.8μH±10% 36807001 L502 LGA0307-10μH±10% 31000001 L505 LGA0307-12μH±10% 31200001 L501 LGB-6800μH 36802105 L405 30000106 LGB1520-701K L402 LCL-SH2A-2B 51090003 L801 LCL-SH2A-2B 51090003 L802 TLK-59097-2 51030001 51020004 ALX31 L401 BCK-150-02A 52040009 T801 52050003 BCT-25-1K1 T401 BSC27-3701E 52030007 T402 40000000 SEMICONDUCTOR 41010004 FW314055/FW314034S D701 41020001 1N4148 D208...
  • Page 86 41040012 MTZJ7.5C(HZ7C2) ZD801 41040007 MTZJ8.2C(HZ9A2) ZD202 41040007 MTZJ8.2C(HZ9A2) ZD211 41040007 MTZJ8.2C(HZ9A2) ZD405 41040013 MTZJ13A(HZ12B2) ZD805 41040026 MTZJ15C(HZ15-2) ZD401 41040027 MTZJ22C ZD820 41040001 HZ51 ZD410 41040001 HZ51 ZD411 41030030 GP15M/TVR4N D801 41030030 GP15M/TVR4N D802 41030030 GP15M/TVR4N D805 41030030 GP15M/TVR4N D806 41030011 1N4004 D808 41030029...
  • Page 87 42000032 BC548(B) V501 42000032 BC548(B) V502 42000032 BC548(B) V503 42000032 BC548(B) V505 42000032 BC548(B) V513 42000032 BC548(B) V602 42000032 BC548(B) V605 42000032 BC548(B) V606 42000032 BC548(B) V607 42000032 BC548(B) V608 42000032 BC548(B) V609 42000032 BC548(B) V610 42000032 BC548(B) V708 42000032 BC548(B) V806 42000032...
  • Page 88 43000004 AN7805 N102 43000004 AN7805 N805 43000005 AN7808 N807 43000140 CD54573ACS N101 43000053 MTV880C.V1.1 N701 43000054 OM8838(PS) N501 43000031 AT24C04 N702 43000050 TDA7057AQ N602 43000051 TDA8351 N301 μPC574J 43000001 ZD702 LTV817B(C)/P817B 44000002 N801 RG-T-3.15A-250V 51100001 F801 ENV59D68F1E 52010012 U101 52060001 HS0038 CP701 51070004...
  • Page 89 71010201 TJC1-2A XP803 71020101 TJC2-1A TP-+B 71020101 TJC2-1A X201 71020101 TJC2-1A X202 71020201 TJC2-2A XP802 71020501 TJC2-5A-4 XP402 71030301 TJC3-3A XP004 71030301 TJC3-3A XP702 71030401 TJC3-4A XP202 71030401 TJC3-4A XP602 71030501 TJC3-5A XP201 71030502 TJC3-5A-4 XP701 E5690160 WIRE AWM1007 150mm M-M' E5690630 WIRE...

Table of Contents