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Sharp SX76NF200 Service Manual

Chassis no. ge-3a
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In the interests of user-safety (Required by safety regulations in some countries) the set should be restored
to its original condition and only parts identical to those specified should be used.
Ë Full Auto Channel Preset and Auto Channel Skip
Ë 100 CH Program Memory
Ë CATV (Hyper Band) Ready
<Used Frequency Synthesizer Tuner>
Ë High Contrast Picture
Ë TELETEXT(10 page)
Ë ON Timer / OFF Timer / Reminder
Ë Picture in Picture / Twin Screen
» SPECIFICATIONS ............................................. 2
» IMPORTANT SERVICE NOTES ........................ 2
» ADJUSTMENT PRECAUTIONS ........................ 3
» WAVEFORMS .................................................. 13
» CHASSIS LAYOUT .......................................... 16
» BLOCK DIAGRAM ........................................... 18
Ë CRT UNIT ..................................................... 27
Ë MAIN UNIT ................................................... 28
Ë LED UNIT ..................................................... 35
Ë KEY UNIT ..................................................... 35
Ë POWER UNIT .............................................. 36
Ë IP UNIT ......................................................... 38
Ë CONTROL UNIT .......................................... 40
The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power
receptacle, when servicing this chassis. To prevent electric shock, do not remove cover. No user - serviceable
parts inside. Refer servicing to qualified service personnel.
SERVICE MANUAL
FEATURES
Ë Blue Back Noise Mute
Ë White Temperature Adjustment
Ë 100Hz SCAN / Progressive SCAN
Ë Headphone Terminal
Ë Stereo (NICAM / A2) Decoder
Ë Rotation adjustment (picture tilt adjustment)
Ë Component Input Terminal
CONTENTS
Page
WARNING
SHARP CORPORATION
1
COLOUR TELEVISION
Chassis No. GE-3A
SX76NF200
MODEL
Ë ELECTRICAL PARTS
MAIN UNIT ................................................... 52
POWER UNIT .............................................. 57
CRT UNIT ..................................................... 60
IP UNIT ......................................................... 61
CONTROL UNIT .......................................... 63
LED UNIT ..................................................... 63
KEY UNIT ..................................................... 63
Ë MISCELLANEOUS PARTS .......................... 64
Ë SUPPLIED ACCESSORIES ......................... 64
Ë PACKING PARTS ......................................... 64
Ë CABINET PARTS ......................................... 64
Ë CABINET PARTS LOCATION ...................... 64
» PACKING OF THE SET ................................... 65
SX76NF200
S34Q9SX76NF20
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Summary of Contents for Sharp SX76NF200

  • Page 1: Table Of Contents

    SX76NF200 SERVICE MANUAL S34Q9SX76NF20 COLOUR TELEVISION Chassis No. GE-3A SX76NF200 MODEL In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.

  • Page 2: Specifications

    SPECIFICATIONS IMPORTANT SERVICE NOTES Convergence ..............Self Convergence System Focus ............Electrostatic Focus High Bi-Potential Maintenance and repairing of this receiver should be done by quali- Sweep Deflection ..................Magnetic Intermediate Frequencies fied service personnel only. Picture IF Carrier .................. 38.9MHz Sound IF Carrier Frequency 5.5MHz ....................

  • Page 3: Adjustment Precautions

    ADJUSTMENT PRECAUTIONS Entering service mode (Method 1) 1. Send the service R/C code to enter the service mode. 2. Send it again to exit the service mode. (Method 2) 1. Short the jumper to enter the service mode. Connect "J 311" with "J 403". 2.
  • Page 4 PIF ADJUSTMENT ADJUSTMENT POINT ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS RF-AGC (1) Receive "PAL COLOUR BAR" signal. Note: For the 50 ohm signal strength ADJUSTMENT E-10cH gauge, when not using 50/75 impedance (I2C BUS CONTROL) adapter, signal strength is 54±1dBµV(50 Signal strength: 54 ±...
  • Page 5 CUT OFF, BKGD ADJUSTMENT CONTINUED PAL CHROMA ADJUSTMENT ADJUSTMENT POINT ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS ADJUSTMENT POINT ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS Max Beam Check (1) Receive 50Hz Monoscope Pattern Signal. SUB COLOUR (1) Receive the "PAL Colour Bar" signal. (E-10CH) I2C Bus adjustment (2) Press R/C to set Picture NORMAL condition.
  • Page 6 HORIZONTAL, VERTICAL, DEFLECTION LOOP ADJUSTMENT CONTINUED FOCUS ADJUSTMENT ADJUSTMENT POINT ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS ADJUSTMENT CONDITION / PROCEDURE ADJUSTMENT POINT WAVEFORM OR OTHERS TRAPEZE (1) Call the "TRAPEZE" mode. FOCUS (1) Receive the "Monoscope Pattern" signal. (Adjusted point) (I2C BUS CONTROL) (2) Increase or decrease "TRAPEZE"...
  • Page 7 CHECKING FUNCTION OPERATION (2) (VIDEO & AUDIO) CONTINUED FUNCTION OPERATION CHECKING (1) (VIDEO & AUDIO) ADJUSTMENT CONDITION / PROCEDURE ADJUSTMENT POINT WAVEFORM OR OTHERS ADJUSTMENT CONDITION / PROCEDURE ADJUSTMENT POINT WAVEFORM OR OTHERS COLOUR SYSTEM (1) Receive the "PAL COLOUR BAR" signal, press the CONTRAST (1) Receive "Monoscope Pattern"...
  • Page 8 CHECKING FUNCTION OPERATION (2) (VIDEO & AUDIO) CONTINUED CHECKING FUNCTION OPERATION (Twin Screen,PinP) ADJUSTMENT CONDITION / PROCEDURE ADJUSTMENT POINT WAVEFORM OR OTHERS ADJUSTMENT CONDITION / PROCEDURE ADJUSTMENT POINT WAVEFORM OR OTHERS TREBLE (1) Receive "E-5ch Monoscope Pattern" signal. Twin Screen (1) Press "Twin Screen"...

  • Page 9: Trouble Shooting Flowchart

    TROUBLE SHOOTING FLOWCHART NO PICTURE Snow noise increase No Snow noise Does the snow noise appear on the CRT at max contrast and brightness control? Does approx.30V appear Check L202, D759 and Check pin(1) and (2) of at pin (9) of TU201(tuner) R761 IC201 Check TU201(tuner),...
  • Page 10 TROUBLE SHOOTING FLOWCHART NO SOUND Check sound setting by R/C. Siganl should be received. Check C1302(C1309) Voltage Check L1302, L1303 Approx. 13V(-13V) D746 and D748 Check IC1301, IC1302 and Speaker...
  • Page 11 TROUBLE SHOOTING FLOWCHART NO FUNCTION (NO SOUND AND NO PICTURE) GREEN Is D2201(LED) on a light? Check IC1001 62pin No Light No Input Pulse Check 3pin of (SD) RY701 connector Check Vertical Circuit Completely 0V Check C2751 Voltage Refer to "No Picture", trouble shooting Check C2705 Voltage...
  • Page 12 TROUBLE SHOOTING FLOWCHART NO VERTICAL SCAN Check the Voltage at pin(15)(1) of IC502 Check D613, D615, R647 and R646 Normal approx. 14V Check vertical trigger pulse at pin(12)(13) of IC502 Check IC4003 and peripheral parts Check IC502 and related circuits...

  • Page 13: Waveforms

    SX76NF200 WAVEFORMS...
  • Page 14 SX76NF200...
  • Page 15 SX76NF200...

  • Page 16: Chassis Layout

    SX76NF200 CHASSIS LAYOUT...
  • Page 17 SX76NF200...

  • Page 18: Block Diagram

    SX76NF200 BLOCK DIAGRAM PWB-A MAIN UNIT...
  • Page 19 SX76NF200...
  • Page 20 SX76NF200 PWB-B POWER UNIT...
  • Page 21 SX76NF200...
  • Page 22 SX76NF200 PWB-D IP UNIT...
  • Page 23 SX76NF200...
  • Page 24 SX76NF200 PWB-C CRT UNIT PWB-E CONTROL UNIT...
  • Page 25 SX76NF200 PWB-F LED UNIT PWB-H KEY UNIT...

  • Page 26: Description Of Schematic Diagram

    SX76NF200 DESCRIPTION OF SCHEMATIC DIAGRAM NOTES: SAFETY NOTES: 1. DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE 1. The unit of resistance “ohm” is omitted. REPLACING PARTS. (K = 1000 ohms, M = Meg ohm). 2. SEMICONDUCTOR HEAT SINKS SHOULD BE REGARDED AS 2.

  • Page 27: Schematic Diagram

    SX76NF200 SCHEMATIC DIAGRAM CRT UNIT...

  • Page 28: Ë Main Unit

    SX76NF200 MAIN UNIT-1/4...
  • Page 29 SX76NF200...
  • Page 30 SX76NF200 MAIN UNIT-2/4...
  • Page 31 SX76NF200...
  • Page 32 SX76NF200 MAIN UNIT-3/4...
  • Page 33 SX76NF200...
  • Page 34 SX76NF200 MAIN UNIT-4/4...

  • Page 35: Ë Led Unit

    SX76NF200 LED UNIT KEY UNIT...

  • Page 36: Ë Power Unit

    SX76NF200 POWER UNIT...
  • Page 37 SX76NF200...

  • Page 38: Ë Ip Unit

    SX76NF200 IP UNIT...
  • Page 39 SX76NF200...

  • Page 40: Ë Control Unit

    SX76NF200 CONTROL UNIT...
  • Page 41 SX76NF200...

  • Page 42: Printed Wiring Board Assemblies

    SX76NF200 PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN UNIT (Wiring side)
  • Page 43 SX76NF200...
  • Page 44 SX76NF200 PWB-A: MAIN UNIT (Chip Parts Side)
  • Page 45 SX76NF200...
  • Page 46 SX76NF200 PWB-B: POWER UNIT (Wiring side)
  • Page 47 SX76NF200...
  • Page 48 SX76NF200 PWB-C: CRT UNIT (Wiring side)
  • Page 49 SX76NF200 PWB-D: IP UNIT (A side) PWB-D: IP UNIT (B Side)
  • Page 50 SX76NF200 PWB-E: CONTROL UNIT (Wiring side)
  • Page 51 SX76NF200 PWB-F: LED UNIT (Wiring side) PWB-H: KEY UNIT (Wiring side)

  • Page 52: Replacement Parts List

    SX76NF200 REPLACEMENT PARTS LIST Ref. No. Part No. Description Code Ref. No. Part No. Description Code PARTS REPLACEMENT DUNTKB946WEV4 PWB-A MAIN UNIT Replacement parts which have these special safety characteristics are identified in this manual; electrical components having such features...
  • Page 53 SX76NF200 Ref. No. Part No. Description Code Ref. No. Part No. Description Code DIODES L1301 RCiLP0195CEZZ+ R Coil L1302 VP-CF3R3K0000Y R Peaking, 3.3µH D202 VHD1SS390++-1Y R 1SS390++ L1303 VP-CF3R3K0000Y R Peaking, 3.3µH D203 VHD1SS390++-1Y R 1SS390++ L1304 VP-CF3R3K0000Y R Peaking, 3.3µH...
  • Page 54 SX76NF200 Ref. No. Part No. Description Code Ref. No. Part No. Description Code C282 VCKYCY1HF103ZY R 0.01 50V Ceramic C1037 VCEA0A1HW105M+R 1 50V Electrolytic C283 VCFYFA1HA474J+ R 0.47 50V Mylar C1039 VCKYCY1HF103ZY R 0.01 50V Ceramic C294 VCEA0A1CW476M+R 47 16V Electrolytic C1040 VCKYCY1EF104ZY R 0.1...
  • Page 55 SX76NF200 Ref. No. Part No. Description Code Ref. No. Part No. Description Code C1351 VCEA0A1HW105M+R 1 50V Electrolytic R251 VRS-CY1JF000JY R 0 1/16W Metal Oxide C1352 VCEA0A1HW105M+R 1 50V Electrolytic R252 VRS-CY1JF473JY R 47k 1/16W Metal Oxide C1353 VCKYCY1HB102KY R 1000p 50V Ceramic...
  • Page 56 SX76NF200 Ref. No. Part No. Description Code Ref. No. Part No. Description Code R356 VRD-RM2HD181JY R 180 1/2W Carbon R1085 VRS-CY1JF000JY R 0 1/16W Metal Oxide R357 VRD-RM2HD181JY R 180 1/2W Carbon R1091 VRS-CY1JF103JY R 10k 1/16W Metal Oxide R358...

  • Page 57: Power Unit

    SX76NF200 Ref. No. Part No. Description Code Ref. No. Part No. Description Code R1347 VRS-CY1JF101JY R 100 1/16W Metal Oxide SC1201 QSOCZ3201CEZZ R Socket R1348 VRS-CY1JF104JY R 100k 1/16W Metal Oxide SLD201 PSLDMA212WJFW R Shield R1350 VRD-RA2BE103JY R 10k 1/8W Carbon...
  • Page 58 SX76NF200 Ref. No. Part No. Description Code Ref. No. Part No. Description Code D743 VHD1SS119//1EY R 1SS119 C607 VCFPVC3CA552H R 5500p 1600V D744 RH-EX0642GEZZY R Zener Diode, 13V MetalIzed Polypro Film D746 RH-DX0411CEZZ R DX0411CE C609 VCFPGU2EC304J R 0.3 250V...
  • Page 59 SX76NF200 Ref. No. Part No. Description Code Ref. No. Part No. Description Code RESISTORS R715 VRN-VV3DBR12J R 0.12 2W Metal Film R716 VRD-RM2HD122JY R 1.2k 1/2W Carbon R515 VRN-RA2BK103FY R 10k 1/8W Metal Film R717 VRN-VV3DBR12J R 0.12 2W Metal Film...

  • Page 60: Crt Unit

    SX76NF200 Ref. No. Part No. Description Code Ref. No. Part No. Description Code P704 QPLGN0460CEZZ R Plug, 4Pin(AA) C1809 VCQYTA1HM102J+ R 1000p 50V Mylar P706 QPLGNA107WJZZ R Plug, 2Pin(XI) C1810 RC-KZ0153CEZZ R 1000p 3kV Ceramic P705 QTiPM0083CEZZ R Tip C1811...

  • Page 61: Ip Unit

    SX76NF200 Ref. No. Part No. Description Code Ref. No. Part No. Description Code R1857 VRD-RA2BE470JY R 47 1/8W Carbon D4005 VHDDAN202K/-1Y R DAN202K R1858 VRD-RA2BE122JY R 1.2k 1/8W Carbon D4007 RH-EX1222CEZZY R Zener Diode, 6.2V R1859 VRD-RA2BE683JY R 68k 1/8W Carbon...
  • Page 62 SX76NF200 Ref. No. Part No. Description Code Ref. No. Part No. Description Code C4065 VCKYCY1EF104ZY R 0.1 25V Ceramic R4096 VRS-CY1JF000JY R 0 1/16W Metal Oxide C4066 VCKYCY1EF104ZY R 0.1 25V Ceramic R4113 VRS-TV1JD000JY R 0 1/16W Metal Oxide C4067...

  • Page 63: Control Unit

    SX76NF200 Ref. No. Part No. Description Code Ref. No. Part No. Description Code FB2750 RBLN-0091GEZZY R Balun P4003 QPLGN0942CEZZ R Plug, 9Pin(KY) SLD4001PSLDMA214WJFW R Shield MISCELLANEOUS PARTS SLD4002PSLDMA215WJFW R Shield J2001 QJAKZ0015CEZZ R Jack J2002 QJAKJ0101SEZZ R Headphones Jack P2001...

  • Page 64: Ë Miscellaneous Parts

    MSPRC0005PEFW R Spring for Power Button QCNW-B421WJZZ R Connecting Cord HDECQA068WJSA R R/C Decoration QCNW-B423WJZZ R Connecting Cord HDECQA066WJSA R LED Decoration QCNW-B424WJZZ R Connecting Cord HBDGB3141CESA R Badge SHARP QCNW-B425WJZZ R Connecting Cord CDORFA016WJSB R Door Ass'y QCNW-B426WJZZ R Connecting Cord 1-10 HiNDPA206WJSA...

  • Page 65: Packing Of The Set

    SX76NF200 PACKING OF THE SET Polystyrene Bag ater al erat on an al Batter es Polyet ylene n rare e ote ontrol n t ater al ng ase er al er ar er ar t e a sta les ot e la e ent te...
  • Page 66 SX76NF200 COPYRIGHT © 2004 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.

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