NEC DSC-3261HA Service Manual

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[Page 1] NEC DSC-3261HA

Service Manual Stereo Color Television CHASSIS : CM-921F PAL/SECAM-B/G, D/K, I, H SYSTEM NTSC 4.43/3.58-M SYSTEM MODEL : DSC-3261HA PF32W502(NEC Model) NEC Corporation Jan.2003 S/M No: TCM921FEFO ...

[Page 2] NEC DSC-3261HA

1 TABLE OF CONTENTS 1. Specification 2 2. CM-921F EEPROM Presetting DATA 3 3. Circuit block Diagram 5 4. Alignment Instruction 6 5. Trouble Shooting Charts 13 6. Part list(DSC-3261H )20 7. Mechanical Exploded View 37 8. Printed Circuit Board 38 9. Sc...

[Page 3] NEC DSC-3261HA

2 1. Specification 1. DSC-3261HA TV Standard Color System PAL, SECAM, 4.43NTSC(AV), 3.58NTSC Sound System B/G, D/K, I, M, H Rated Voltage AC 110V ~ 240V, 50/60Hz Power Consumption 148W Sound Output Power Main 8W X 2 HYPER + CHINA + IVORY COAST Channe...

[Page 4] NEC DSC-3261HA

1. Pre-setted Chanel for Australian 3 2. CM-921F EEPROM Presetting DATA 2 PAL 2CH ( 64.25MHz) for Austlaina Field Chanel 7 PAL 7CH (182.25MHz) for Austlaina Field Chanel 9 PAL 9CH (196.25MHz) for Austlaina Field Chanel 10 PAL 10CH (209.25MHz) ...

[Page 5] NEC DSC-3261HA

4 CM-921F EEPROM Presstting DATA 4. CPU option for Function Change ON with PIP OFF Without PIP ON Enable the Digital Sensor OFF Disable the Digital Sensor ON for all models, except NEC OFF Enable the English(NEC) ON 34"inch OFF 32"inch LA...

[Page 6] NEC DSC-3261HA

5 3. circuit block Diagram ...

[Page 7] NEC DSC-3261HA

6 4. Alignment Instruction 1. SERVICE REMOCON & EEPROM PRESETTING DATA 1-1. SERVICE REMOCON : R-34SVC (S/N:48B3034SVC) 1-2. EEPROM PRESETTING DATA PAL NTSC S1 - S2 - Screen adjustments S3 - S4 - S5 - V-CENTER +3095 +3927 V-SIZE +151 +138 H-CENTE...

[Page 8] NEC DSC-3261HA

7 Alignment Instruction 2. The confirmation of Protection circuit Protection circuit confirmation is omitted in case of mass production in the factory 2-1. Over Current Protecor (OCP) circuit confirmation 2-1-1. Receive PAL RETMA PATTERN(signal of co...

[Page 9] NEC DSC-3261HA

8 3-1.Confirm the presetting ‘IBRM’ data of EEPROM according to CRT. 3-1-1. Default Value of IBRM : IBRM(34inch) = 320, IBRM(29inch Flat) = 340 3-2. Press the [S2] KEY of SVC Remocon, Screen-Adjustment OSD will be displayed. 3-3. Adjust SCREEN V...

[Page 10] NEC DSC-3261HA

9 Alignment Instruction 6. The adjustment of AGC 7. The adjustment of GEOMETRY 6-1. Main and Sub AGC DATA are Fixed, but those can be adjusted in case of need. 6-2. Confirm the Main AGC and Sub AGC by pressing the [S10]key of SVC remocon. Main AGC=13...

[Page 11] NEC DSC-3261HA

10 Alignment Instruction 7-6. The adjustment of PINCUSHION 7-6-1. Receive PAL CROSSHATCH pattern(signal of company:PAL-B 5CH). 7-6-2. Press the PR up/down Keys ( / ) to select PARAVOLRA. Referring to the 2th line of both side, adjust with Vol Up/Do...

[Page 12] NEC DSC-3261HA

11 Alignment Instruction 8. THE ADJUSTMENT OF SUB-PICTURE (SUB-BRIGHT, SUB-CONTRAST) 7-7. The adjustment of Vertical Linearity 7-7-1. Receive PAL CROSSHATCH pattern(signal of company:PAL-B 5CH). 7-7-2. Fix adjustment of Vertical Linearity after EEP...

[Page 13] NEC DSC-3261HA

12 Alignment Instruction 9. THE ADJUSTMENT OF PIP 8-4. The adjustment of SUB-CONTRAST 8-4-1. Fix adjustment of SUB-CONTRAST after EEPROM DATA presetting. 8-4-2. Reference (Default value) : 07 9-1. Receive PAL RETMA pattern(signal of company:PAL-B 2CH...

[Page 14] NEC DSC-3261HA

13 1. NO RASTER 5. Trouble Shooting Charts Check Standby 5.5V & Main B+(132V) line ABNORMAL ABNORMAL ABNORMAL NORMAL NORMAL VOLTAGE ABNORMAL Check horizental dirve Pulse at 24th pin of I701 Check/Replace I701 Check/Replace Q401, T401, Q402 D402, ...

[Page 15] NEC DSC-3261HA

14 Trouble shooting Chats 2. NO COLOR Check signal at 19th pin of I701 NORMAL ABNORMAL Refer to no picture Change the system PAL ---> NTSC ---> SECAM Check R, G, B signal 42,43,44th of I701 Check/Replace Q501, Q542, Q543, Q544 Check CRT BLOCK C...

[Page 16] NEC DSC-3261HA

15 Trouble Shooting Charts 3. NO PICTURE Check 19th pin of I701 ABNORMAL NORMAL ABNORMAL ABNORMAL NORMAL Check signal at R, G, B of I701 Change input mode RF--->AV--->RF Check signal at IF of Tuner Check IF module, SF01, 12V line, 5V line Chec...

[Page 17] NEC DSC-3261HA

16 Trouble Shooting Charts 4. NO VERTICAL SCANNING(ONE HORIZONTAL LINE RASTER) Check DY Connector NORMAL NORMAL ABNORMAL ABNORMAL ABNORMAL Check/Replace D406, D403” 48V line, 19V line Check Input Voltage of I301 Check Vertical input(Vin+, Vin-) of...

[Page 18] NEC DSC-3261HA

17 Trouble Shooting Charts 5. NO SOUND(PICTURE OK) Check direction & connection of H/P Connector(P503) & AV3 Connector(P504) NORMAL NORMAL ABNORMAL ABNORMAL NORMAL Check 6th pin of I701 (normal:Low) Check signal at 28, 29, 58th pin of I601 C...

[Page 19] NEC DSC-3261HA

18 Trouble Shooting Charts 6. NO PIP NORMAL ABNORMAL Check H sync & V sync of IP03 Check signal at 15, 16, 17, 18th pin of IP03 Check/Replace QCP01, QCP02, QCP03, QCP07 Check signal at 24, 26, 28th pin of IP03 7. NO EXTERNAL AV(RF OK) NORMAL ABNO...

[Page 20] NEC DSC-3261HA

19 Trouble Shooting Charts 8. REMOTE CONTROL UNIT TROUBLE NORMAL ABNORMAL Check battery and LED of Remocon Check IR of Preamp and Vcc of Preamp IC(IE01) NORMAL Check/Replace 8th pin of I701 Replace battery ABNORMAL Replace Preamp IC(IE01) ...

[Page 21] NEC DSC-3261HA

20 M252 4952500200 GRILL SPKR L PS SHEET T0.6 GY M481 4954800301 BUTT0N POWER ABS GY M481A 4856716000 SPRING SWPA PIE0.5 M561 4855622900 MARK BRAND DIACUTTING(NEC) ZZ210 PTSPPWD713 SPEAKER AS DSC-3261HA SP01 48A8306600 SPEAKER SYSTEM SS-78128F07 ZZ29...

[Page 22] NEC DSC-3261HA

21 LOC PART CODE PART NAME PART DESCRIPTION REMARKLOC PART CODE PART NAME PART DESCRIPTION REMARK Part List U102B 4859003750 PLUG PHONE AS PLUG+CABLE 1365AWG26=150B X501 5XE20R250E CRYSTAL QUARTZ HC-49/U 20.2500MHZ 30PPM X601 5XE18R432E CRYST...

[Page 23] NEC DSC-3261HA

22 LOC PART CODE PART NAME PART DESCRIPTION REMARKLOC PART CODE PART NAME PART DESCRIPTION REMARK Part List C737 CEXF1H470V C ELECTRO 50V RSS 47MF (6.3X11) TP C738 CEXF1H470V C ELECTRO 50V RSS 47MF (6.3X11) TP CA01 CEXF1H100V C ELECTRO 50V RS...

[Page 24] NEC DSC-3261HA

23 LOC PART CODE PART NAME PART DESCRIPTION REMARKLOC PART CODE PART NAME PART DESCRIPTION REMARK Part List D541 DUZ7R5BM— DIODE ZENER UZ-7.5BM D542 DUZ7R5BM— DIODE ZENER UZ-7.5BM D550 D1N4148—- DIODE 1N4148 (TAPPING) D551 D1N4148—- D...

[Page 25] NEC DSC-3261HA

24 LOC PART CODE PART NAME PART DESCRIPTION REMARKLOC PART CODE PART NAME PART DESCRIPTION REMARK Part List J604 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J605 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J606 85801065GY WIRE COPPER ...

[Page 26] NEC DSC-3261HA

25 LOC PART CODE PART NAME PART DESCRIPTION REMARKLOC PART CODE PART NAME PART DESCRIPTION REMARK Part List R523 RD-AZ223J- R CARBON FILM 1/6 22K OHM J R525 RD-AZ153J- R CARBON FILM 1/6 15K OHM J R526 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R5...

[Page 27] NEC DSC-3261HA

26 LOC PART CODE PART NAME PART DESCRIPTION REMARKLOC PART CODE PART NAME PART DESCRIPTION REMARK Part List RA03 RD-AZ560J- R CARBON FILM 1/6 56 OHM J RA04 RD-AZ560J- R CARBON FILM 1/6 56 OHM J RA11 RD-AZ101J- R CARBON FILM 1/6 100 OHM J RA12...

[Page 28] NEC DSC-3261HA

27 LOC PART CODE PART NAME PART DESCRIPTION REMARKLOC PART CODE PART NAME PART DESCRIPTION REMARK Part List 0000B 7174300811 SCREW TAPPTITE TT2 RND 3X8 MFZN I811 PTH2SW6900 HEAT SINK ASS`Y 1KA7805—- + 7174301011 00001 1KA7805—- IC REGULAT...

[Page 29] NEC DSC-3261HA

28 LOC PART CODE PART NAME PART DESCRIPTION REMARKLOC PART CODE PART NAME PART DESCRIPTION REMARK Part List E03 4856310300 EYE LET BSR T0.2 (R1.6) E030 4856310300 EYE LET BSR T0.2 (R1.6) E031 4856310300 EYE LET BSR T0.2 (R1.6) E034 4856310600...

[Page 30] NEC DSC-3261HA

29 LOC PART CODE PART NAME PART DESCRIPTION REMARKLOC PART CODE PART NAME PART DESCRIPTION REMARK Part List R836 RS01Z100J- R M-OXIDE FILM 1W 10 OHM J (TAPPING) R881 RS02Z912JS R M-OXIDE FILM 2W 9.1K OHM J SMALL RF401 RF01Z278K- R FUSIBLE 1W ...

[Page 31] NEC DSC-3261HA

30 LOC PART CODE PART NAME PART DESCRIPTION REMARKLOC PART CODE PART NAME PART DESCRIPTION REMARK Part List D302 DUZ15BM—- DIODE ZENER UZ-15BM D303 DRGP15J—- DIODE RGP15J D309 DUZ33B—— DIODE ZENER UZ-33B D310 DUZ33B—— DIODE ZENER ...

[Page 32] NEC DSC-3261HA

31 LOC PART CODE PART NAME PART DESCRIPTION REMARKLOC PART CODE PART NAME PART DESCRIPTION REMARK Part List L309 5MC0000100 COIL BEAD HC-3550 L310 5CPZ109M04 COIL PEAKING 1UH 10.5MM M (LAL04TB) L311 5CPZ109M04 COIL PEAKING 1UH 10.5MM M (LAL04...

[Page 33] NEC DSC-3261HA

32 LOC PART CODE PART NAME PART DESCRIPTION REMARKLOC PART CODE PART NAME PART DESCRIPTION REMARK Part List ZP01 5PYXT4R5MB FILTER CERA XT 4.5MB ZP02 5PYXT6R5MB FILTER CERA XT 6.5MB ZP03 5PYXT6R0MB FILTER CERA XT 6.0MB ZP04 5PYXT5R5MB FILTER ...

[Page 34] NEC DSC-3261HA

33 LOC PART CODE PART NAME PART DESCRIPTION REMARKLOC PART CODE PART NAME PART DESCRIPTION REMARK Part List RCP10 HRFT151JCA R CHIP 1/10 150 OHM J 2012 RCP11 HRFT151JCA R CHIP 1/10 150 OHM J 2012 RCP12 HRFT151JCA R CHIP 1/10 150 OHM J 2012 RC...

[Page 35] NEC DSC-3261HA

34 LOC PART CODE PART NAME PART DESCRIPTION REMARKLOC PART CODE PART NAME PART DESCRIPTION REMARK Part List LP10 5CPZ479K02 COIL PEAKING 4.7UH K (AXIAL 3.5MM) LP11 5CPZ150K02 COIL PEAKING 15UH K (AXIAL 3.5MM) R101 RD-AZ562J- R CARBON FILM 1/6...

[Page 36] NEC DSC-3261HA

35 LOC PART CODE PART NAME PART DESCRIPTION REMARKLOC PART CODE PART NAME PART DESCRIPTION REMARK R902 RD-AZ912J- R CARBON FILM 1/6 9.1K OHM J R904 RD-AZ393J- R CARBON FILM 1/6 39K OHM J R906 RD-AZ392J- R CARBON FILM 1/6 3.9K OHM J R907 RD-AZ...

[Page 37] NEC DSC-3261HA

36 LOC PART CODE PART NAME PART DESCRIPTION REMARK R986 RD-AZ240J- R CARBON FILM 1/6 24 OHM J RF01 RD-AZ201J- R CARBON FILM 1/6 200 OHM J RF02 RD-AZ331J- R CARBON FILM 1/6 330 OHM J RF03 RD-AZ471J- R CARBON FILM 1/6 470 OHM J RF04 RD-AZ561J- R CA...

[Page 38] NEC DSC-3261HA

37 7. Mechanical Exploded View ...

[Page 39] NEC DSC-3261HA

38 8. Printed Circuit Board ...

[Page 40] NEC DSC-3261HA

39 Printed Circuit Board ...

[Page 41] NEC DSC-3261HA

40 Printed Circuit Board ...

[Page 42] NEC DSC-3261HA

41 9. Schematic Diagram ...

[Page 43] NEC DSC-3261HA

42 Schematic Diagram ...

[Page 44] NEC DSC-3261HA

43 Schematic Diagram ...

[Page 45] NEC DSC-3261HA

NEC Corporation 7-1, SHIBA 5-CHOME MINATO-KU, TOKYO 108-8001, JAPAN ...