Sharp CX68KF5 Service Manual
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Sharp CX68KF5 Service Manual

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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 100 CH Program Memory
Ë AV Mode (Standard/ Dynamic/ Soft)
Ë CATV Hyper Band Ready
Ë PAL/NTSC 3line Comb Filter
Ë ON/OFF Velocity Modulation
Ë Black Stretch Circuit
Ë Picture Noise Reduction
Ë White Temp. Select
Ë Aperture Control
» SPECIFICATIONS ............................................. 2
» IMPORTANT SERVICE NOTES ........................ 2
» ADJUSTMENT PRECAUTIONS ........................ 3
» TROUBLE SHOOTING TABLE ....................... 16
» CHASSIS LAYOUT .......................................... 21
» BLOCK DIAGRAM ........................................... 22
» WAVEFORMS .................................................. 35
Ë CRT UNIT ..................................................... 37
Ë MAIN UNIT (CX68KF5) ................................ 38
Ë MAIN UNIT (SX68KF7) ................................ 42
Ë POWER UNIT .............................................. 46
Ë OPERATION UNIT ....................................... 48
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
MODELS
FEATURES
Ë IGR-B/G (Only SX68KF7)
Ë Bass+
Ë Multi Language (English/Chinese/Russian/French/
Ë ON/OFF Reminder Timer
Ë Power Save Mode
Ë Rear AV-In 1 & 2, S-Video In, AV Output
CONTENTS
Page
WARNING
SHARP CORPORATION
1
COLOUR TELEVISION
Chassis No. NFC
CX68KF5
SX68KF7
Malay/Arabic)
(Monitor Out), Headphone and Front AV-In 3
Ë IGR UNIT ...................................................... 49
» REPLACEMENT PARTS LIST
Ë ELECTRICAL PARTS
MAIN UNIT ................................................... 59
POWER UNIT .............................................. 64
CRT UNIT ..................................................... 67
IGR UNIT (SX68KF7) ................................... 67
OPERATION UNIT ....................................... 68
Ë SUPPLIED ACCESSORIES ......................... 69
Ë PACKING PARTS ......................................... 69
Ë CABINET PARTS ......................................... 69
CX68KF5
SX68KF7
SY0M8CX68KF5/
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Summary of Contents for Sharp CX68KF5

  • Page 1: Table Of Contents

    » SCHEMATIC DIAGRAM IGR UNIT (SX68KF7) ........67 Ë CRT UNIT ............. 37 OPERATION UNIT ........68 Ë MAIN UNIT (CX68KF5) ........ 38 Ë SUPPLIED ACCESSORIES ......69 Ë MAIN UNIT (SX68KF7) ........ 42 Ë PACKING PARTS ......... 69 Ë POWER UNIT ..........46 Ë...

  • Page 2: Specifications

    SPECIFICATIONS Power Input ..................AC 220 - 240V, 50 Hz IMPORTANT SERVICE NOTES Power Consumption ................158 W (CX68KF5) 163 W (SX68KF7) Convergence ................Self Convergence System Maintenance and repair of this receiver should be done by Focus ..............Bi-Potential, Uni-Potential Electrostatic qualified service personnel only.

  • Page 3: Adjustment Precautions

    ADJUSTMENT PRECAUTIONS SERVICE MODE This model’s setting are adjusted in two different ways: through the I C bus control and in the 1.) In the Service Mode, Key is used to select the mode in the following order. conventional analog manner. The adjustments via the I C bus control include preset-only items and variable data.
  • Page 4 SERVICE MODE 50 Hz ADJ. MODE User Data in Service Mode Option V-SIZE 50 Hz (V-SIZE 50) TRAPEZIUM 50 Hz (TRAPE 50) • While SERVICE MODE 1 on, EEPROM DATA will switch to the service data. V-LINEARITY 50 Hz (V-LINE 50) E/W CORNER 50 Hz (E/W COR 50) Also, once press the menu button at the remote controller, EEPROM will switch to SERVICE MODE OPTION.
  • Page 5 N-PD 1 CHIP NTSC PHASE EEPROM SETTING DATA LENGTH DATA SETTING INITIAL SUB SHARPNESS (TV) 0 ~ 63 S SHARP T 1 CHIP SHARPNESS DATA SUB SHARPNESS (AV) 0 ~ 63 S SHARP A 1 CHIP SHARPNESS MICOM INFO. DISPLAY...
  • Page 6 0 ~ 15 SBASS1 SHARP AVM3 SHARP 3 BASS MAX SYAKIT 2 0 ~ 15 SBASS2 SHARP AVM1 FL SHARP 1 FL BASS MAX SYAKIT 3 0 ~ 15 SBASS3 SHARP AVM2 FL SHARP 2 FL TREBLE MAX SYAKIT 1...
  • Page 7 INITIAL SETTING SREC/SRAC/SYI/STTM SREC-SCA (SKD) R/C CODE MCL 1 (R/C CODE 117h) MCL 2 (R/C CODE 169h) (1) Execute MCL 1/2 key to set the following data in EEPROM. TV-CH. CH-No. Fv (MHz) S-SYSTEM CH-No. Fv (MHz) S-SYSTEM SKIP OFF FREE E-37 599.25 SREC/SRAC/SYI/STTM...
  • Page 8 SHIPPING SETTING AND CHECKING SERVICE ADJUSTMENT PIF ADJUSTMENT CHECKING (1) The following default data has been factory-set for the E PROM. No. Adjustment point Adjustment Condition / Procedure Waveform or others ITEMS DATA SETTING FACTORYSET 1 FACTORYSET 2 FACTORYSET 3 FACTORYSET 4 Tuner IFT 1.
  • Page 9 ADJUSTMENT) 2. Connect the oscilloscope to the Audio Out (L 2. Connect the digital voltmeter to TP2300 or pin (CX68KF5) or R) terminal. (Terminate with 10K ohm (1) of SC200 (in the main unit). impedance). 3. Verify that it is turned counterclockwise to 0V 3.
  • Page 10 PURITY ADJUSTMENT UNIFORMITY ADJUSTMENT No. Adjustment point Adjustment Condition / Procedure Waveform or others No. Adjustment point Adjustment Condition / Procedure Waveform or others PURITY 1. Receive the GREEN -ONLY signal and set the Uniformity Before adjustment begin, Horizontal magnetic ADJUSTMENT beam current to 1.6mA with the contrast adjustment (To...
  • Page 11 CONVERGENCE ADJUSTMENT FOCUS ADJUSTMENT No. Adjustment point Adjustment Condition / Procedure Waveform or others No. Adjustment point Adjustment Condition / Procedure Waveform or others CONVERGENCE (1)Receive the Crosshatch pattern signal. Dynamic 1. Receive the Monoscope pattern signal. ADJ (To be (2)Using the remote controller, call NORMAL focus 2.
  • Page 12 CUT OFF, BKGD, SUB-CONT ADJUSTMENT CUT OFF, BKGD, SUB-CONT ADJUSTMENT No. Adjustment point Adjustment Condition / Procedure Waveform or others No. Adjustment point Adjustment Condition / Procedure Waveform or others CRT CUTOFF 1. Receive the Monoscope pattern signal. MAX BEAM 1.
  • Page 13 CUT OFF, BKGD, SUB-CONT ADJUSTMENT HORIZONTAL, VERTICAL, DEFLECTION LOOP AND ADJUSTMENT No. Adjustment point Adjustment Condition / Procedure Waveform or others No. Adjustment point Adjustment Condition / Procedure Waveform or others SUB- 1. Receive the window pattern signal with AV * Receive the Crosshatch pattern V-AMP 50 Adjust the overscan to 8.5%...
  • Page 14 PAL CHROMA ADJUSTMENT NTSC CHROMA ADJUSTMENT No. Adjustment point Adjustment Condition / Procedure Waveform or others No. Adjustment point Adjustment Condition / Procedure Waveform or others SUB COLOUR 1. Receive the the PAL Colour Bar signal. SUB-TINT 1. Select the sub-tint adjustment mode (automatic Y 100%W 75%W C BUS...
  • Page 15 FUNCTION OPERATION CHECKING (1) (VIDEO & AUDIO) FUNCTION OPERATION CHECKING (2) (VIDEO & AUDIO) No. Adjustment point Adjustment Condition / Procedure Waveform or others No. Adjustment point Adjustment Condition / Procedure Waveform or others CONTRAST 1. Receive the Monoscope Pattern signal. HEADPHONE 1.

  • Page 16: Trouble Shooting Table

    TROUBLE SHOOTING TABLE TROUBLE SHOOTING TABLE (Continued) NO VERTICAL SCAN NO RASTER Normal Check the voltage at pin (6) of IC1501. Abnormal Check CRT connector (KY), (H) bias. Is pin (10) of IC700 in "L" level ? Normal Abnormal Does D1200 (Power LED) turn on? Check vertical trigger pulse at pin (26) of IC800.
  • Page 17 TROUBLE SHOOTING TABLE TROUBLE SHOOTING TABLE (Continued) (Continued) NO LED LIGHT PROM (IC1001) Bus-Err 2000 (ms) V/C/D (IC800) Bus-Err Check F3700. Check F3700. 2000 (ms) Tuner (TU200) Normal Blown out Bus-Err 2000 (ms) S-CONTROL (IC1300) Bus-Err Replace the Fuse. 2000 (ms) Bus-Err AV-SWITCH...
  • Page 18 TROUBLE SHOOTING TABLE TROUBLE SHOOTING TABLE (Continued) (Continued) NO PICTURE No snow noise. Does the snow noise appear on the picture tube at max Snow noise increase. contrast and brightness control? Check pins (6) and (7) of IC800. Does 5V appear at pins (6) and (7) Check IC600, L200, TU200 of TU200 (TUNER)? and etc.
  • Page 19 TROUBLE SHOOTING TABLE TROUBLE SHOOTING TABLE (Continued) (Continued) NO NORMAL SOUND NO SPECIFIC COLOUR Is audio output terminal J400 normal ? Is only RF signal's colour abnormal? Is there audio signal at pins (3) and (22) Check TV sound. Check TU200, of IC300? NO COLOUR Q455, IC400 and...
  • Page 20 TROUBLE SHOOTING TABLE (Continued) COLOUR PRODUCED Colour control circuit detective. Colour in B/W mode. Colour saturation control does not Fix control to coloured system. work. Turn up and down colour control. Turn colour control to minimum. Turn on colour system forced Does colour gain go up and Does colour disappear? switch.

  • Page 21: Chassis Layout

    CX68KF5 SX68KF7 CHASSIS LAYOUT...
  • Page 22 CX68KF5 SX68KF7 MODEL CX68KF5 BLOCK DIAGRAM-1...
  • Page 23 CX68KF5 SX68KF7 MODEL CX68KF5 BLOCK DIAGRAM-2...
  • Page 24 CX68KF5 SX68KF7 MODEL SX68KF7 BLOCK DIAGRAM-1...
  • Page 25 CX68KF5 SX68KF7 MODEL SX68KF7 BLOCK DIAGRAM-2...
  • Page 26 CX68KF5 SX68KF7 BLOCK DIAGRAM-3...

  • Page 27: Block Diagram

    CX68KF5 SX68KF7 BLOCK DIAGRAM-4...
  • Page 28 CX68KF5 SX68KF7 BLOCK DIAGRAM-5...
  • Page 29 CX68KF5 SX68KF7 MODEL SX68KF7 BLOCK DIAGRAM-6...

  • Page 30: Waveforms

    CX68KF5 SX68KF7 WAVEFORMS Pin 2 Vp-p=1.8v Pin 3 Vp-p=1.7v Pin 1 Vp-p=2.46v Pin 4 Vp-p=2.04v Pin 5 Vp-p=58.4v Pin 6 Vp-p=288v Pin 7 Vp-p=1090v Pin 8 Vp-p=10v Pin 9 Vp-p=4.64v Pin 10 Vp-p=1.0v Pin 12 Vp-p=4.6v Pin 11 Vp-p=1.0v Pin 13 Vp-p=3.96v Pin 14 Vp-p=3.88v...

  • Page 31: Description Of Schematic Diagram

    CX68KF5 SX68KF7 DESCRIPTION OF SCHEMATIC DIAGRAM SAFETY NOTES: 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 32: Schematic Diagramë Crt Unit

    CX68KF5 SX68KF7 SCHEMATIC DIAGRAM: CRT Unit...
  • Page 33 CX68KF5 SX68KF7 MODEL CX68KF5 SCHEMATIC DIAGRAM: MAIN-1 Unit...
  • Page 34 CX68KF5 SX68KF7 MODEL CX68KF5 SCHEMATIC DIAGRAM: MAIN-2 Unit...
  • Page 35 CX68KF5 SX68KF7 MODEL SX68KF7 SCHEMATIC DIARGAM: MAIN-1 Unit...
  • Page 36 CX68KF5 SX68KF7 MODEL SX68KF7 SCHEMATIC DIARGAM: MAIN-2 Unit...
  • Page 37 CX68KF5 SX68KF7 SCHEMATIC DIARGAM: POWER Unit...
  • Page 38 CX68KF5 SX68KF7 SCHEMATIC DIARGAM: OPERATION Unit...
  • Page 39 CX68KF5 SX68KF7 MODEL SX68KF7 SCHEMATIC DIARGAM: IGR Unit...

  • Page 40: Printed Wiring Board Assemblies

    CX68KF5 SX68KF7 PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN Unit (Wiring Side)
  • Page 41 CX68KF5 SX68KF7 PWB-A: MAIN Unit (Chip Parts Side)
  • Page 42 CX68KF5 SX68KF7 PWB-B: POWER Unit (Wiring Side)
  • Page 43 CX68KF5 SX68KF7 PWB-C: CRT Unit (Wiring Side) (Wiring Side) (Chip Parts Side) PWB-D: IGR Unit...
  • Page 44 CX68KF5 SX68KF7 PWB-E: OPERATION Unit (Wiring Side)

  • Page 45: Solid State Device Base Diagram

    CX68KF5 SX68KF7 SOLID STATE DEVICE BASE DIAGRAM TOP VIEW COLLECTOR COLLECTOR BASE EMITTER BASE EMITTER D601A M24C08W FX0008GE B709A iX3394CEN2 TDA16846 iX3395CEN2 COLLECTOR 6 5 4 1 2 3 BASE EMITTER M1437BF M62334FP VSiMZ1A iR9358 iX2283CEN2 2SC2735 CXA2089Q BH3543F iiR9358//-1...

  • Page 46: Main Unit

    R 2SB709A Q5406 VS2SD601A//-1 R 2SD601A PRINTED WIRING BOARD ASSEMBLIES (NOT REPLACEMENT ITEM) DIODES D201 VHD1SS390++-1 R Diode (CX68KF5) PWB-A DUNTKA122FMW5 – MAIN Unit (CX68KF5) — D202 RH-EX0619GEZZ R Zener Diode PWB-A DUNTKA122WEV6 – MAIN Unit (SX68KF7) — D203 RH-EX0619GEZZ...
  • Page 47 R Peaking 12µH C340 VCEA0A1CW106M R 10 Electrolytic L203 VP-XF1R2K0000 R Peaking 1.2µH C341 VCEA0A1CW106M R 10 Electrolytic L205 VP-XF1R2K0000 R Peaking 1.2µH (CX68KF5) AB C342 VCKYCY1CF104Z R 0.1 Ceramic L401 VP-XF120K0000 R Peaking 12µH C343 VCEA0A1CW107M R 100 Electrolytic L600 VP-DF120K0000 R Peaking 12µH...
  • Page 48 CX68KF5 SX68KF7 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A DUNTKA122FMW5 (CX68KF5) C1013 VCCCCY1HH220J R 22p Ceramic PWB-A DUNTKA122WEV6 (SX68KF7) C1014 VCCCCY1HH220J R 22p Ceramic C1015 VCEA0A1HW105M R 1.0 Electrolytic MAIN UNIT (Continued) C1019 VCKYCY1HF103Z R 0.01...
  • Page 49 CX68KF5 SX68KF7 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A DUNTKA122FMW5 (CX68KF5) R221 VRS-CY1JF221J R 220 1/16W Metal Oxide PWB-A DUNTKA122WEV6 (SX68KF7) R222 VRD-RA2BE333J R 33k 1/8W Carbon R223 VRD-RA2BE101J R 100 1/8W Carbon MAIN UNIT (Continued)
  • Page 50 SX68KF7 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A DUNTKA122FMW5 (CX68KF5) R1008 VRD-RA2BE101J R 100 1/8W Carbon PWB-A DUNTKA122WEV6 (SX68KF7) R1009 VRS-CY1JF562J R 5.6k 1/16W Metal Oxide R1010 VRS-CY1JF101J R 100 1/16W Metal Oxide MAIN UNIT (Continued)

  • Page 51: Power Unit

    CX68KF5 SX68KF7 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A DUNTKA122FMW5 (CX68KF5) PWB-B DUNTKA123FMV5 PWB-A DUNTKA122WEV6 (SX68KF7) POWER UNIT MAIN UNIT (Continued) INTEGRATED CIRCUITS R1333 VRD-RA2BE101J R 100 1/8W Carbon R1334 VRD-RA2BE561J R 560 1/8W...
  • Page 52 CX68KF5 SX68KF7 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-B DUNTKA123FMV5 C1535 VCFYAA2AA224J R 0.22 100V Mylar C1536 VCEA0A1HW474M R 0.47 Electrolytic POWER UNIT (Continued) C1537 VCEA0A1VW108M R 1000 Electrolytic C1538 VCEA0A1HW105M R 1.0 Electrolytic...
  • Page 53 CX68KF5 SX68KF7 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-B DUNTKA123FMV5 R1700 VRW-KP3HC330J R 33 Cement R1752 VRD-RA2BE102J R 1.0k 1/8W Carbon POWER UNIT (Continued) R1753 VRS-VV3DB153J R 15k 2W Metal Oxide R1754 VRD-RA2EE185J R 1.8M 1/4W...

  • Page 54: Crt Unit

    CX68KF5 SX68KF7 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-C DUNTKA075FMW3 R1515 VRD-RA2BE820J R 82 1/8W Carbon R1516 VRD-RA2BE820J R 82 1/8W Carbon CRT UNIT R1517 VRD-RA2BE122J R 1.2k 1/8W Carbon R1518 VRD-RA2BE683J R 68k 1/8W...

  • Page 55: Operation Unit

    CX68KF5 SX68KF7 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-D DUNTK9668FMV8 (SX68KF7) PWB-E DUNTKA124WEV0 IGR UNIT (Continued) OPERATION UNIT TRANSISTORS C2343 VCE9GA1HW105M R 1.0 Elect. (N.P) C2344 VCKYCY1HF103Z R 0.01 Ceramic Q1200 VS2SC3198-Y-1 R 2SC3198-Y...
  • Page 56 R Guarantee Card TiNS-7065PEZZ R Operation Manual (SX68KF7) AF TiNS-7173PEZZ R Operation Manual (CX68KF5) AG RRMCG1570PESA R Infrared R/C Unit (SX68KF7) RRMCG1571PESA R Infrared R/C Unit (CX68KF5) 1-4 1-5 1-6 1-7 1-8 1-9 PACKING PARTS (NOT REPLACEMENT ITEM) SPAKC6698PEZZ – Packing Case (CX68KF5) —...
  • Page 57 Code Ref. No. Part No. Description Code COPYRIGHT © 2000 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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