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Sampo 21000000000, Service Manual

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Sampo 21000000000 Service Manual Download Page 17

45-TRA4M5-0Y0

CER TRAP TPS 4.5MHZ

1

X201

46-12866W-02XG

PIN BASE *2 S11-02Y

1

P601 FOR FRONT CAB.(SPK)

46-20598W-04XG

 PIN BASE *4 TJC1-4A

1

P401 FOR DY CONNECTER

46-33079W-02XG

 PIN BASE *2 TJC3-2A

1

P602 FOR FRONT CAB.(SPK)

46-33079W-03XG

PIN BASE *3 TJC3-3A

1

P001

46-33079W-05XG

PIN BASE *5 TJC3-5A

1

P201 FOR CRT BD

46-35179W-04XG

PIN BASE TJC3-4A

1

P402 FOR CRT BD P502

57-10654X-00F

TWIST TIE NY66

3

62-227680-0UA

BRACKET ABS-KINGFA 606 (UO)

1

64-P30060-104G

M/C SCREW P 3 X 6

2

FOR IC401 & IC402

64-B30100-104G

 M/C SCREW B 3 X 10

2

FOR IC601

64-P30100-104G

M/C SCREW P 3 X 10

2

FOR Q402 & IC301

65-Z30050-23MG

 NUT M 3

2

FOR Q402 & IC301

66-343730-0B0

HOLLOW RIVET 1.6MMX3.0MMX3.2MM

2

FOR L411

66-343730-0B0

HOLLOW RIVET 1.6MMX3.0MMX3.2MM

2

FOR L412

66-343730-0B0

HOLLOW RIVET 1.6MMX3.0MMX3.2MM

3

FOR Q402

66-343730-0B0

HOLLOW RIVET 1.6MMX3.0MMX3.2MM

4

FOR C421,C406B

66-343730-0B0

HOLLOW RIVET 1.6MMX3.0MMX3.2MM

9

FOR T402

66-343740-0B0

HOLLOW RIVET (2.3MMX4.0MMX3.5MM)

2

FOR R402

67-H24249-2M2

HEAT SINK

1

FOR IC402

67-H24249-3M2

HEAT SINK

1

FOR IC401

67-H30752-3A0

HEAT SINK

2

FOR IC301 & Q402

67-H34423-EA0

HEAT SINK

1

FOR IC601

10-79C6V2-DBX

DIODE ZENER 6V2 1/2W 5%

1

D207

10-79C10V-DBX

DIODE ZENER 10V 1/2W 5%

1

FOR (-)& P28/IC201 TO (+)接IC201底部地

10-79C10V-DBX

DIODE ZENER 10V 1/2W 5%

1

FOR (-)& P29/IC201 TO (+)接IC201底部地

10-79C6V2-DBX

DIODE ZENER 6V2 1/2W 5%

1

FOR (-)& P43/IC201 TO (+)接IC201底部地

10-CW574C-DJX

DIODE CW574CD

1

FOR C106 (DIODE“+” TO GND)

25-BFB220-M1X

CAP. ELEC 22 UF 50V +/-20%

1

FOR D101 (CAPACITOR“-” TO GND)

T8-0A21SG-PW2

ASS'Y - POWER BD

1

10-00RU3C-FBX

HIGH EFFICIENCY RECTIFIER RU3C

1

D831

10-0FR104-FBX

DIODE FR104 (FAST RECTIFIER)

1

D833

10-0RL255-EBX

DIODE RL255 OR RL206(POWER RECTIFIER)

1

D815

10-0RL255-EBX

DIODE RL255 OR RL206(POWER RECTIFIER)

1

D816

10-0RL255-EBX

DIODE RL255 OR RL206(POWER RECTIFIER)

1

D817

10-0RL255-EBX

DIODE RL255 OR RL206(POWER RECTIFIER)

1

D818

10-0RU3YX-FBX

DIODE RU3YX

1

D830

10-1N4148-ABX

DIODE 1N4148 (SWITCHING)

1

D805

10-1SS136-ABX

DIODE 1SS136

1

D804

10-1SS136-ABX

DIODE 1SS136

1

D835

10-79C8V2-DBX

DIODE ZENER 8V2 1/2W 5%

1

D839

10-HER108-FBX

DIODE HER108

1

D806

10-HS16VC-DBX

DIODE 500MW 16HSC

1

D838

10-HS6V2B-DBX

DIODE 6V2  500MW

1

D840

11-SC1815-YBX

TRANSISTOR 2SC1815-Y (NPN)

1

Q832

11-SC1815-YBX

TRANSISTOR 2SC1815-Y (NPN)

1

Q831

11-SC2688-LAX

TRANSISTOR 2SC2688L (NPN)

1

Q830

11-SK2996-0AX

TRANSISTOR 2SK2996 (MOS)

1

Q801

13-0HPC92-2CP

PHOTO COUPLER HPC922-C

1

IC802

13-44608P-40P

IC MC44608P40G

1

IC801

18-CB0102-JNX

RES. C.F. 1K OHM 1/6W +/-5%

1

R809

18-CB0183-JNX

RES. C.F. 18K OHM 1/6W +/-5%

1

R838

18-CB0183-JNX

RES. C.F. 18K OHM 1/6W +/-5%

1

R844

18-CB0332-JNX

RES. C.F. 3.3K OHM 1/6W +/-5%

1

R834

Summary of Contents for 21000000000

Page 1: ... Procedure 24 5 Block Diagram 33 6 Schematic Diagram 34 7 PCB Layout 35 8 Explode View Diagram 36 9 Troubleshooting 37 This manual is the latest at the time of printing and does not include the modification which may be made after the printing by the constant improvement of product ...

Page 2: ...ce of uninsulated voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to the person The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the appliance CAUTION Use of controls adjustments or procedures...

Page 3: ...onnel 8 Do not subject your television set to impact of any kind Be particularly careful not to damage the picture tube surface 9 Unplug this television set from the wall outlet before cleaning Do not use liquid cleaners or aerosol cleaners Use a damp cloth for cleaning 10 1 Do not place this television set on an unstable cart stand or table The television set may fall causing serious injury to a ...

Page 4: ...pporting structure grounding of the lead in wire to an antenna discharge unit size of grounding conductors location of antenna discharge unit connection to grounding electrode and requirements for the grounding electrode 15 2 Note to CATV system installer Only for the television set with CATV reception This reminder is provided to call the CATV system attention to Article 820 40 of the NEC that pr...

Page 5: ... 21 If you are unable to restorenormal operation by following the detailedprocedurein your operating instructions do not attempt any further adjustment Unplug the set and call your dealer or service technician 22 Whenever the television set is damaged or fails or a distinct change in performance indicates a need for service unplug the set and have it checked by a professional service technician 23...

Page 6: ...Noise Reduction Yes Picture Display Display Type Screen Format Size Visual size vis cm 21 Deflection System CRT only Tube Technology CRT only CRT Defl CRT Gun CRT Magn field Resolution Coating only for D V sets White Point Sound Leaflet Power RMS Power Intern 2X3W RMS Power Extern Surround Sound Sound Features Mute Smart sound 4 modes Sound Control Volume Sound Speakers Speaker configuration 2 spe...

Page 7: ...inch CVBS Mo Out Cinch Audio Stereo Out Cinch Audio Mono Out Cinch Dolby Surround Dig Audio Out Loudspeakers Control Busses Feature Slot ITV Smart Port Terr Antenna in 75 Ohms F type Guide IR Blaster Jack Connectors Front In Cinch CVBS St In Cinch CVBS Mo Headphone Out Connectors Side In Y C Cinch CVBS St In Y C Cinch Stereo In Cinch CVBS St x IN Cinch CVBS Mo Headphone Out Connectors Top Connecto...

Page 8: ...s EAN Indication Approbation Tests Local Integration Various Perf Param Service Call Rate PIP POP Type Features Digital Reception Transmission Built in Data System Text Standard Tele text Features Nbr bckgrnd page Mem Size Text Technology Digital Data handling Program Guide Built in Clock Timer Type Features Built in Radio Type Built in PC display PC Synch PC Control Built in DVD drive Type of Med...

Page 9: ...NX RES M O 2 7K OHM 1 2W 5 1 R514 18 FE0272 JNX RES M O 2 7K OHM 1 2W 5 1 R515 18 FE0272 JNX RES M O 2 7K OHM 1 2W 5 1 R518 18 FG0183 JHX RES M O 18K OHM 2W 5 1 R510 18 FG0183 JHX RES M O 18K OHM 2W 5 1 R511 18 FG0183 JHX RES M O 18K OHM 2W 5 1 R512 25 BCB221 M1X CAP ELEC 220 UF 16V 20 1 C508 26 AIL103 KBX CAP CER 10NF 500V 10 1 C504 26 AMM221 JZX CAP CER 220PF 2KV 5 SL 1 C505 26 EBP103 ZF1 CAP CE...

Page 10: ...0 WIRE BARE JUMPER 5MM 1 J1002 41 WJ0060 B00 WIRE BARE JUMPER 6MM 1 R1013 41 WJ0060 B00 WIRE BARE JUMPER 6MM 1 R1001 46 30407H 05XG HS UL2468 24 5C TS 180 TJC3 5Y 1 P1001B FOR M BD P005 46 39073H 03XG HS 2P 1617 22 200 TJC1 2Y VH 3Y 1 FOR PWR SW BD P802 PWR PARTS 46 39219W 03XG PIN BASE VH 3AW 1 P802 46 39219W 03XG PIN BASE VH 3AW 1 P801 FOR POWER CORD 48 POW001 AX0G SWITCH POWER 1 SW801 57 426610...

Page 11: ...STOR 3DD1555 1 Q402 11 SA1015 YBX TRANSISTOR ST2SA1015Y PNP 1 Q003 11 SA1015 YBX TRANSISTOR ST2SA1015Y PNP 1 Q202 11 SA1015 YBX TRANSISTOR ST2SA1015Y PNP 1 Q210 11 SA1015 YBX TRANSISTOR ST2SA1015Y PNP 1 Q605 11 SC1815 YBX TRANSISTOR 2SC1815 Y NPN 1 Q002 11 SC1815 YBX TRANSISTOR 2SC1815 Y NPN 1 Q203 11 SC1815 YBX TRANSISTOR 2SC1815 Y NPN 1 Q208 11 SC1815 YBX TRANSISTOR 2SC1815 Y NPN 1 Q209 11 SC181...

Page 12: ...21 JNX RES C F 220 OHM 1 6W 5 1 R238 18 CB0221 JNX RES C F 220 OHM 1 6W 5 1 R401 18 CB0222 JNX RES C F 2 2K OHM 1 6W 5 1 R044 18 CB0222 JNX RES C F 2 2K OHM 1 6W 5 1 R055 18 CB0223 JNX RES C F 22K OHM 1 6W 5 1 R215 18 CB0223 JNX RES C F 22K OHM 1 6W 5 1 R912 18 CB0223 JNX RES C F 22K OHM 1 6W 5 1 R913 18 CB0224 JNX RES C F 220K OHM 1 6W 5 1 R206 18 CB0271 JNX RES C F 270 OHM 1 6W 5 1 R217 18 CB027...

Page 13: ... R402 18 RG0228 JHX RES WIRE ROUND 0 22 OHM 2W 5 1 R620 25 BCA102 M1X CAP ELEC 1000 UF 16V 20 1 C232 25 BCB100 M1X CAP ELEC 10 UF 16V 20 1 C004 25 BCB100 M1X CAP ELEC 10 UF 16V 20 1 C023 25 BCB100 M1X CAP ELEC 10 UF 16V 20 1 C025 25 RCB100 M1X CAP ELEC 10 UF 16V 20 1 C220 25 RCB100 M1X CAP ELEC 10 UF 16V 20 1 C227 25 RCB100 M1X CAP ELEC 10 UF 16V 20 1 C231 25 BCB100 M1X CAP ELEC 10 UF 16V 20 1 C31...

Page 14: ...R 1000 PF 50V 20 1 C219 26 EBP103 ZFX CAP CER 0 01UF 50V 80 20 F 1 C005 26 EBP103 ZFX CAP CER 0 01UF 50V 80 20 F 1 C017 26 EBP103 ZFX CAP CER 0 01UF 50V 80 20 F 1 C019 26 EBP103 ZFX CAP CER 0 01UF 50V 80 20 F 1 C020 26 EBP103 ZFX CAP CER 0 01UF 50V 80 20 F 1 C024 26 EBP103 ZFX CAP CER 0 01UF 50V 80 20 F 1 C081 26 EBP103 ZFX CAP CER 0 01UF 50V 80 20 F 1 C102 26 EBP103 ZFX CAP CER 0 01UF 50V 80 20 F...

Page 15: ... PL 22 UH 5 1 L208 34 R330J2 0EX COIL PL 33 UH 5 1 L080 34 R330J2 0EX COIL PL 33 UH 5 1 L202 34 R829J2 0EX COIL PL 8 2 UH 5 1 L204 36 HDR001 AX1 TRANSFOR HOR DRIVE MAGNETIC CORE 1 T401 41 WJ0050 B00 WIRE BARE JUMPER 5MM 1 L101 41 WJ0055 B00 WIRE BARE JUMPER 5 5 MM 1 J922 41 WJ0060 B00 WIRE BARE JUMPER 6MM 1 J001 41 WJ0060 B00 WIRE BARE JUMPER 6MM 1 J009A 41 WJ0060 B00 WIRE BARE JUMPER 6MM 1 J101 4...

Page 16: ...R 10MM 1 J017 41 WJ0100 B00 WIRE BARE JUMPER 10MM 1 J102 41 WJ0100 B00 WIRE BARE JUMPER 10MM 1 J110 41 WJ0100 B00 WIRE BARE JUMPER 10MM 1 J111 41 WJ0100 B00 WIRE BARE JUMPER 10MM 1 J221 41 WJ0100 B00 WIRE BARE JUMPER 10MM 1 J402 41 WJ0100 B00 WIRE BARE JUMPER 10MM 1 J910 41 WJ0100 B00 WIRE BARE JUMPER 10MM 1 J911 41 WJ0100 B00 WIRE BARE JUMPER 10MM 1 J917 41 WJ0105 B00 WIRE BARE JUMPER 10 5MM 1 J3...

Page 17: ...10V 1 2W 5 1 FOR P28 IC201 TO 接IC201底部地 10 79C10V DBX DIODE ZENER 10V 1 2W 5 1 FOR P29 IC201 TO 接IC201底部地 10 79C6V2 DBX DIODE ZENER 6V2 1 2W 5 1 FOR P43 IC201 TO 接IC201底部地 10 CW574C DJX DIODE CW574CD 1 FOR C106 DIODE TO GND 25 BFB220 M1X CAP ELEC 22 UF 50V 20 1 FOR D101 CAPACITOR TO GND T8 0A21SG PW2 ASS Y POWER BD 1 10 00RU3C FBX HIGH EFFICIENCY RECTIFIER RU3C 1 D831 10 0FR104 FBX DIODE FR104 FAS...

Page 18: ... 1 C835 25 BKJ331 M1X CAP ELEC 330 UF 200V 20 1 C806 26 ABC101 JZX CAP CER 100 PF 50V 5 SL 1 C814 26 ABC104 ZFX CAP CER 0 1 UF 50V 80 20 F 1 C813 26 ABC104 ZFX CAP CER 0 1 UF 50V 80 20 F 1 C831 26 ABC104 ZFX CAP CER 0 1 UF 50V 80 20 F 1 C842 26 ABC221 JZX CAP CER 220 PF 50V 5 SL 1 C841 26 ABC471 JZX CAP CER 470 PF 50V 5 SL 1 C851 26 AGA221 KRX CAP CER 220PF 250V 10 1 C830 26 AIL103 KBX CAP CER 10N...

Page 19: ...MM 1 J811 41 WJ0195 B00 WIRE BARE JUMPER 19 5MM 1 J828 41 WJ0195 B00 WIRE BARE JUMPER 19 5MM 1 J829 41 WJ0200 B00 WIRE BARE JUMPER 20MM 1 J830 46 10962W 02XG PIN BASE 2 TJC2 2A 1 P801 64 B30100 104G M C SCREW B 3 X 10 1 FOR Q801 66 20516X 0B0 FUSE HOLDER 2 FOR FUSE 66 343730 0B0 HOLLOW RIVET 1 6MMX3 0MMX3 2MM 4 FOR T803 66 343730 0B0 HOLLOW RIVET 1 6MMX3 0MMX3 2MM 3 FOR RT801 66 343730 0B0 HOLLOW ...

Page 20: ...0 PF 50V 20 1 C306 26 EBP103 ZFX CAP CER 0 01UF 50V 80 20 F 1 C905 26 EBP103 ZFX CAP CER 0 01UF 50V 80 20 F 1 C917 26 EBP103 ZFX CAP CER 0 01UF 50V 80 20 F 1 C925 26 EBP103 ZFX CAP CER 0 01UF 50V 80 20 F 1 C927 40 2111SG MAM1XG P C B MAIN BD 1 41 WJ0050 B00 WIRE BARE JUMPER 5MM 1 J201 41 WJ0050 B00 WIRE BARE JUMPER 5MM 1 J906 41 WJ0060 B00 WIRE BARE JUMPER 6MM 1 J905 41 WJ0075 B00 WIRE BARE JUMPER...

Page 21: ... TUBE 67 1E0 W O CRT 1 T8 21OFLN FSG1GA1 ASS Y MATCH TUBE 67 1E0 W O CRT 1 T8 21OFLN MSG1GAA ASS Y METCH TUBE NOMINAL M BD 1 T8 250250 SKY ASS Y SKD PACKING 1 74 045045 40F POLYBAG W ANTISTATIC MAIN PCB 1 75 369900 C00 SKD POLYFOAM BASIN 1 17 76 002135 0AC CARTON BOX 0 042 74 015020 50Q PLASTIC BAG 1 FOR CRT BD PACKING T8 325000 SKY ASS Y SKD PACKING 1 75 388320 CC0 POLYFOAM BOARD 0 05 FOR PMC 89 ...

Page 22: ...9MMX0 3MM 7 STICK ON REAR CABINET 59 130460 00X RUBBER PAD 25MMX7MM 2 STICK ON REAR CAB FOOTING 62 314340 0UN FBT SUPPORTER HIPS KINGFA 113 VO 1 62 378080 1UN TRACK 1 62 389620 0UD POWER LINE BLOCK 1 63 B30100 BT4G S T SCREW B3X10BT 2 MTG SIDE AV BD REAR CABINET 63 B40200 AB2G S T SCREW B 4 X 20 AB 6 MTG FRONT REAR CABINET 63 F30100 BT3G S T SCREW F 3 X 10 BT 2 MTG RCA JACK REAR CABINET 63 W30100 ...

Page 23: ...AD KEYS 1 55 HS36RB 1HA RREMOTEHANDSET BOTTOMCABINET 1 55 HS36RD 0HA RBATT DOOR 1 55 HS36RT 1HA RREMOTEHANDSET FRONTCABINET 1 58 HS36R2 6UI INLAY REMOTE HANDSET 1 T8 HS36R0 PAY ASS Y PACKING 1 76 002091 0AT CARTON BOX LWH 624X384X556MM 0 006 76 326350 01A CARTON SHEET 61X37X0 3CM 0 062 V8 T7M123 03E02 SOFTWARE CODE 1 FOR IC001 ...

Page 24: ... D mode press TV AV button to turn off the vertical output Adjust the SCRREEN switch on the flyback transformer to make a horiz ontal shining line just visible on the screen Turn on the vertical output adjust the FOCUS on the flyback transformer to obtain the optimum focus 5 White balance adjustment 1 Apply the black and white pattern in normal status 2 Alignment of normal color temperature Change...

Page 25: ... Y 286 Use a color analyzer to measure the white side of the screen By changing the value of GD C BD C set the reading of the color analyzer to X 279 Y 286 Separately set the brightness and contrast from min to max repeat the step 2 and 3 until the reading of the color analyzer is correct Note Provided the production line is equipped with the self White balance adjusting equipment white balance of...

Page 26: ... directly by pressing digital button 1 9 0 notebook CAP Display Sleep Calendar System INS Favorite Return Picture Menu 1 Remote key 1 Item Remark RC R cut off setting GC G cut off setting BC B cut off setting GD G drive setting BD B drive setting Menu 2 Remote key 2 Item Remark HIGH5 Height 50Hz VP50 Vertical position 50Hz VLIN5 Vertical linearity 50Hz VSC5 Vertical S correction 50Hz VBLK5 Vertica...

Page 27: ...k ST3 50 Sharpness TV mode 3 58 system SV3 50 Sharpness AV mode 3 58 system SV4 50 Sharpness AV mode other system SVD 50 Sharpness DVD mode ASSH Asymmetric sharpness 04H bit 7 5 SHPX Maximum sharpness SHPN Minimum sharpness Menu 7 Remote key 7 Item Remark Bit 0 Bit 1 under factory mode 00 11 STD 01 IRC 10 HRC Bit 2 STD IRC HRC 1 user control 0 under factory mode Bit 3 1 forbid CATV 95 96 97 Bit 4 ...

Page 28: ... Bit 3 1 decreasing contrast when menu on Bit 4 1 OSD don t disappear automatically Bit 5 1 biological Bit 6 0 CH LOCK W O V CHIP OPTM1 Bit 7 When turn on 0 child lock off 1 child lock on Bit 0 Bit 1 Bit 2 Power on mode 00 standby 01 previous 10 11 force power on Bit 3 Hotel mode 1 on 0 off Bit 4 Bit 5 Power on under hotel mode 00 TV 01 Video1 02 TV2 03 Last Bit 6 1 under factory mode turn off the...

Page 29: ...English 1 yes 0 no Bit 1 French 1 yes 0 no Bit 2 Portuguese 1 yes 0 no Bit 3 Spanish 1 yes 0 no Bit 4 AV Color system PAL443 1 1 yes 0 no Bit 5 AV Color system NTSC443 1 1 yes 0 no Bit 6 AV AUTO 1 AUTO1 PAL443 NTSC358 NTSC443 0 AUTO2 NTSC358 PALM PALN MDOE5 Bit 7 Bit 0 1 auto search function of the menu key on the front panel Bit 1 1 curtain when turn on the set Bit 2 1 curtain when turn off the s...

Page 30: ... s video mode Bit 2 0 YDL 15H bit 2 0 40ns 240ns Bit 4 3 NTSC matrix 03H bit 7 6 N1 N2 DVD Bit 5 C gamma 02H bit 7 color gamma on off Bit 6 P N ID 17H bit 4 PAL NTSC killer sensit Bit 7 FID 17H bit 3 Killer off Bit 1 0 ABL gain 16H bit 5 4 Bit 3 2 ABL start point 16H bit 7 6 Bit 4 WPS 00H bit 7 ABL Bit 5 OSD ABCL 16H bit 3 Bit 1 0 Black stretch 15H bit 4 3 Bit 3 2 Y gamma 15H bit 6 5 Bit 5 4 OSD l...

Page 31: ...temperature GD C G drive setting for cool color temperature BD C B drive setting for cool color temperature Menu 16 Remote key System INS Item Remark RC W R cut off setting for warm color temperature GC W G cut off setting for warm color temperature BC W B cut off setting for warm color temperature GD W G drive setting for warm color temperature BD W B drive setting for warm color temperature YUVG...

Page 32: ...nu 21 no shortcut key Item Remark THEATER BAS Theater bass THEATER TRE Theater treble CONCERT BAS Concert bass CONCERT TRE Concert treble BROCAST BAS Brocast bass BROCAST TRE Brocast treble Menu 22 no shortcut key Item Remark VOL_MAI Volume Loudspeaker GATE Carrier Mute VOL OUT AV output gain AV GAIN AV input Gain Note Provided the production line is equipped with the self adjusting equipment The ...

Page 33: ...V U Y Y SIF OUT CVBS Y E2 PROM 24C08 SDA SCL AMP TDA7057AQ L R MCU VCD TMPA8823 CRT Video amplifie Horizontal output Vertical output STV9302 TUNER SAWF 112V 12 9V 5V 4052 AV1 VIDEO AV2 VIDEO MSP3425 AV1 L R AV2 L R ...

Page 34: ......

Page 35: ......

Page 36: ......

Page 37: ...801 shorted to earth Yes Cheek Replace Q801 Is D815 D818 OK Yes Check IC801 and the peripheral components Replace D815 D818 No No Figure 1 Fuse Blown No raster abnormal B Is the B resistance to earth ok Check the load of B No Yes Check IC802 and their peripheral components Yes Check Q830 Q831 Q832 etc Figure2 No Raster Abnormal B ...

Page 38: ...f IC401 9V Check R233 C231 and C233 yes No Figure3 No Raster B OK No No No picture dense noise dots Is the antenna feed line or the adapter broken or unsoldered Handing the antenna fault Yes No Is the signal at Pin41 Pin42 of IC201 ok Is the signal at IF pin of the tuner Is the signal at Pin SCL SDA of tuner ok No Check signal at P57 P58 of IC201 and replace the abnormal relative circuit Yes Check...

Page 39: ...t the red probe to GND use the black probe to touch B of Q101 Are there interference particles flashing on the screen Yes Replace the Tuner No Is the voltage at P29 P36 of IC201 ok No Check and repair the 9V power supply No Bridge a capacitor of 1000pF between the input and output of Z101 Apply the pointer of multimeter at R X 1 K Ω connect the red probe to GND and use the black probe to touch B o...

Page 40: ...ce the power supply of IC1001 Then RESET NG Is the BUS ok Check IC201 and the relative circuit No No Check Replace Q1001 X1002 NG Is the waveform at P31 of IC201 ok Replace IC201 No Yes Replac e IC601 Check Replace Q604 Q605 No Figure 6 No Sound Is both 14V and 14V ok Yes No Is the signal at P1 of IC301 ok Check Replace IC301 Check signal at P16 of IC201 No Check Replace IC201 C234 Yes Check Repla...

Page 41: ...form of pin 14 of IC901 No Q905 and its peripheral circuit No Check Pin61 of IC201 and peripheral circuit Check the logic of Pin9 Pin10 of IC901 Yes Replace IC901 Yes AV has Picture TV hasn t Picture Is the waveform at P30 of IC101 ok Check Q208 Q209 and peripheral circuit Yes Check IC201 and relative circuit please reference the previous page named Figure 5 No Figure 8 No Picture 5 Faultfinding a...

Page 42: ...of IC201 No Check the power supply of IC201 Are there H V flyback pulses at P12 of IC201 No No Check R408 R406 D404 C422 Yes Check Replace IC201 No Check the waveform at Pin57 Pin58 of IC201 No Yes Is the 33V 5 VA power supply ok Check Repair 33V power supply No Yes Is there the short circuit around the integration circuit Check Replace the tuner No Check Repair the integration Yes Figure 9 Tuning...

Page 43: ...t P9 and P55 of IC201 ok Is there the 8MHz 5Vp p sine wave oscillations at P6 of IC201 Is the voltage at P5 of IC201 ok Have P5 of IC201 shorted to GND in an instant Can the IC201 work Check Repair the reset circuit Yes Yes Yes No Check Replace IC201 No No Are C021 C022 and X001 ok No Replace the disabled components Yes No Check Q002 and peripheral circuit Yes ...

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