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Sharp 21KF-80S Service Manual
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Sharp 21KF-80S Service Manual

Pal b/g system colour television
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ELECTRICAL SPECIFICATIONS ..................... 3
IMPORTANT SERVICING NOTES .................. 4
CONTROLS & TERMINALS ............................. 5
ADJUSTMENT PROCEDURES ...................... 6
HOTEL MODE FUNCTIONS .......................... 12
LED FLASHING CODE ...................................13
CHASSIS LAYOUTS .......................................14
SHARP CORPORATION
SERVICE MANUAL
PAL
SYSTEM COLOUR TELEVISION
B/G
MODEL
In the interests of user safety (required by safety
regulations in some countries) the set should restored
to its original condition and only parts identical to
those specified should be used.
CONTENTS
PRINTED WIRING BOARDS ........................... 15
ICs ADDITIONAL INFORMATION ..................20
SCHEMATIC DIAGRAMS .............................. 27
BLOCK DIAGRAMS ....................................... 33
TROUBLESHOOTING TABLES ...................... 36
PARTS LISTING ............................................. 39
SOURCE OF DOCUMENTATION ................. 43
1
SE0021KF80S00
Issued: 18
GA-1E CHASSIS
21KF-80S
This document has been published to
be used for after sales service only.
21KF-80S
Feb. 2003
th

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  • Page 1: Table Of Contents

    21KF-80S SERVICE MANUAL SE0021KF80S00 Issued: 18 Feb. 2003 GA-1E CHASSIS SYSTEM COLOUR TELEVISION 21KF-80S MODEL In the interests of user safety (required by safety regulations in some countries) the set should restored to its original condition and only parts identical to those specified should be used.
  • Page 2 21KF-80S Service Manual update log sheet Technical Report No. Application Cause / Solution Part No. Page No. Data /Serial No. Technical Bulletin No. Use this page to keep any special servicing information as Technical Report (Bulletin), Technical Information, etc. If only part number changes are required, just change part number directly the part number in the Parts Listing Section.

  • Page 3: Electrical Specifications

    21KF-80S ELECTRICAL SPECIFICATIONS Power Input ....220V-240 Volts AC 50Hz • Sound Carrier Trap ......33.4MHz • Power Consumption • Normal Operation ..49W • Adjacent Sound Carrier Trap ....40.4MHz (Method IEC60107) Stand-by Operation ........3W Adjacent Picture Carrier Trap ....31.9MHz Audio Power Output Rating ....

  • Page 4: Important Servicing Notes

    21KF-80S IMPORTANT SERVICING NOTES Only qualified service personnel are allowed to carry out maintenance and repair of this receiver. Servicing of high voltage system and CRT It is important that the static charge is removed from the high voltage system when carrying out work on the receiver.

  • Page 5: Remote Control

    21KF-80S CONTROLS & TERMINALS Remote Control Infrared Transmitter Window Aim this window at the infrared sensor on your TV set CALL ( )/CHILD LOCK ( ) button TV/VIDEO Select button TV/VIDEO Single/Double Entry button ( POWER/STANDBY ( ) button COLOUR buttons...

  • Page 6: Adjustment Procedures

    21KF-80S ADJUSTMENT PROCEDURES Service Mode function All required adjustments for servicing this TV set, may be done in “service mode”, excepting G2 and FOCUS. How to access the Service Mode Turn the receiver on and ensure that it is tuned into a test pattern.
  • Page 7 21KF-80S Service adjustment and data list The table below shows the various service mode positions, range of values and default value. The columns are headed as below. Heading: Descriptions: This is what will appear on the screen at this position.
  • Page 8 21KF-80S No. OSD Function Range Initial Default FIX/ADJ 26 HTL-PRG Hotel Program number 0...99 or > 99 for none OSD RGB Reference 0...15 28 SEARCH-SYS Sound system for auto tuning 0(L-BG),1(BG),2(I),3(DK) 29 CUT-R Black Level off-set R [BLR] 0...63 30 CUT-G Black Level off-set G [BLG] 0...63...

  • Page 9: Screen Adjustment

    21KF-80S Screen adjustment 1. G2 Adjustment Enter the service mode (see page 6). Use the channel up or channel down buttons to enter the << BLUE-BACK >> function. 5 “  9GF Set this to << BLUE-BACK: 0 >>, i.e. blue background is turned off.
  • Page 10 21KF-80S Geometry adjustment procedure To adjust the geometry, follow the procedure outlined below: 1. Tune the set into a Philips test pattern. 2. Enter the service mode as described on page 6. 3. Use the channel up or channel down buttons to enter the desired mode 4.
  • Page 11 21KF-80S Colour adjustment procedure The following adjustments should only be carried out when the CRT or IC801 are replaced. Notes: 1. This adjustment must be done after warming up the unit for 30 minutes or longer with a beam current over 700 µA.

  • Page 12: Hotel Mode Functions

    21KF-80S HOTEL MODE FUNCTIONS The following procedure details how to set up the Hotel Mode Functions. 1. Short Description 1.1. Hotel Mode “HTL”: Main Hotel Mode. It deactivates “Channel Setting” functions. It reduces the Maximum Volume. 1.2. Hotel Mode “HTL-VOL”: Maximum Volume Level Regulation.

  • Page 13: Led Flashing Code

    21KF-80S 3.3.1. Initial value: 255. Range: 0 to 255. Service Mode indication: HTL-PRG. 3.3.2. To activate this Hotel Mode it is necessary activate previously Hotel Mode “HTL”. 3.3.4. Select “HTL-PRG” by using channel up/down buttons. 3.3.3. The initial value to 255, ensures that the TV Set starts up in the same program number that it was been displayed before turn it off.

  • Page 14: Chassis Layouts

    21KF-80S CHASSIS LAYOUTS PWB A - Mother unit, F7340N8 21HS50C 21HS50F 21HS50C PWB B - CRT unit, F7341N0 PWB C - Jack unit, FB758ZZ...

  • Page 15: Printed Wiring Boards

    21KF-80S PRINTED WIRING BOARDS F 7341N0 CRT Unit PWB. Components side. FB758ZZ Jack Unit PWB. Component side.
  • Page 16 21KF-80S F 7340N8 Mother Unit PWB. Component side...
  • Page 17 21KF-80S F 7340N8 Mother Unit PWB. Component side...
  • Page 18 21KF-80S F 7340N8 Mother Unit PWB. Copper side...
  • Page 19 21KF-80S F 7340N8 Mother Unit PWB. Copper side...

  • Page 20: Ics Additional Information

    21KF-80S ICs ADDITIONAL INFORMATION TDA9350 (IC801 Quick Reference Data SYMBOL PARAMETER MIN. TYP. MAX. UNIT Supply − − supply voltages 8.0/3.3 − − supply current 135/60 Input voltages − − µV video IF amplifier sensitivity (RMS value) iVIFrms) − −...
  • Page 21 21KF-80S TDA9350 (IC801) Block Diagram...
  • Page 22 21KF-80S TDA9350 (IC801) Pinning SYMBOL DESCRIPTION P1.3/T1 port 1.3 or Counter/Timer 1 input P1.6/SCL port 1.6 or I C-bus clock line P1.7/SDA port 1.7 or I C-bus data line P2.0/TPWM port 2.0 or Tuning PWM output P3.0/ADC0/PWM0 port 3.0 or ADC0 input or PWM0 output P3.1/ADC1/PWM1...
  • Page 23 21KF-80S TDA9350 (IC801) SYMBOL DESCRIPTION INSSW2 RGB / YUV insertion input R2/VIN R input / V (R-Y) input G2/YIN G input / Y input B2/UIN B input / U (B-Y) input BCLIN beam current limiter input / (V-guard input, note 2)

  • Page 24: Block Diagram

    21KF-80S TEA1507 (IC701) Block Diagram SUPPLY START-UP V CC DRAIN MANAGEMENT CURRENT SOURCE clamp internal UVLO start n.c. VALLEY supply M-level VOLTAGE CONTROLLED LOGIC OSCILLATOR 100 mV OVER- FREQUENCY VOLTAGE CONTROL PROTECTION OVER- LOGIC DRIVER DRIVER TEMPERATURE PROTECTION I ss −1...
  • Page 25 21KF-80S AN7523 (IC303) Block Diagram Pin Descriptions Pin No. Description Ch Output (+) Ch Output (-) Standby Ch Input Volume Note: Do not apply voltage or current to NC pin from outside AN5522 (IC501) Block Diagram Pin Descriptions Pin No.
  • Page 26 21KF-80S MSP34x5G (IC3001) Pinning VREF1 DACM_L SC1_OUT_R DACM_R SC1_OUT_L VREF2 AHVSUP 33 32 31 30 29 28 27 26 25 24 23 CAPL_M RESETQ AHVSS I2S_DA_IN2 AGNDC DVSS SC2_IN_L DVSUP SC2_IN_R ADR_CL MSP 34x5G I2S_DA_IN1 SC1_IN_L I2S_DA_OUT SC1_IN_R I2S_WS VREFTOP...

  • Page 27: Schematic Diagrams

    21KF-80S SCHEMATIC DIAGRAMS Description Note: Safety note: 1. The unit of resistance «ohm»is omitted (K=1000 ohms. 1. Disconnect the AC plug from the AC outlet be- M= Megaohm). fore replacing parts. 2. All resistors are 1/16 watt. unless otherwise noted.
  • Page 28 21KF-80S  ...
  • Page 29 21KF-80S Schematic Diagram of CRT Unit (F7341N0) Schematic Diagram of Jack Unit (FB758ZZ)
  • Page 30 21KF-80S Schematic Diagram of Mother Unit (F7340N8)
  • Page 31 21KF-80S Schematic Diagram of Mother Unit (F7340N8)
  • Page 32 21KF-80S Schematic Diagram of Mother Unit (F7340N8)

  • Page 33: Block Diagrams

    21KF-80S BLOCK DIAGRAMS CRT Unit (F7341N0)
  • Page 34 21KF-80S Mother unit, F7340N8...
  • Page 35 21KF-80S Mother unit, F7340N8...

  • Page 36: Troubleshooting Tables

    21KF-80S TROUBLESHOOTING TABLES NO RASTER Check F701. Blown out. Replace the fuse. The fuse is again blown Check T701 pin16 voltage. (Approx. 290V at 220V AC) Check IC701,D701,D702, D703,D704 and C705. Check R701,Q701 and IC701. Check Secondary Main+B. (Approx. 118V ) Check D758,IC702 and D751.
  • Page 37 21KF-80S NO VERTICAL SCAN Check IC501 bias. Check IC501, the connectors Check D501,D505,C502 and C514 and F5, and adjacent NO SPECIFIC COLOUR Is some colour produced in B/W broadcast Check IC801, R801,R802, Is the white balance D804, D805 and D806.
  • Page 38 21KF-80S NO PICTURE, NO SOUND Does the noise level increase at max. Contrast, Brightness and Sound Noise increase but . No snow noise. No signal is received. Check the tuner supply voltage Does noise or signal appear LB must be approx 5V.

  • Page 39: Parts Listing

    21KF-80S 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( PARTS LISTING '  5+';&(== ',2'( ,1* *(1(5$/ ,167580(17 6 $$ '  5+(;*(== =(1(5 ',2'( 07=-%7 52+0 6 $$ REPLACEMENT PARTS '  5+(;*(== =(1(5 ',2'( 07=-%7 52+0 6 $$...
  • Page 40 21KF-80S 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( &  9&($$(:0 (/(& & 8)  6 $$ &  9&.<3$+%. &&$3$&,725 3)9 6 $$ &  9&($$&:0 (/(& & 8)  9 6 $$ &...
  • Page 41 21KF-80S 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 5  956&<-)- 6&+,3 5(6 7$3( . 2+0 6 $$ 5  95199$%5- 0(7 ),/0 5  2+0  : 6 $% 5  956&<-)-...
  • Page 42 21KF-80S 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 5() 1R 3$576 '(6&5,37,21 61 &2'( (; &2'( 3  43/*1&(== 3/8* 6 $$ 5  95'5$+'- 5(6 .2+0  : 6 $$ 3  43/*1&(== &211(&725 %%(+$ -67 6 $$...

  • Page 43: Source Of Documentation

    21KF-80S ACCESSORIES R/C Battery Cover Operation Batteries R6(x2) GCOVHA009WJSA Manual Set UBATU0013TAZZ TINS-A554WJKA, Operation Manual Remote Control RRMCGA006WJSA SOURCE OF DOCUMENTATION TDA9350, Philips Data Sheet: µ TDA935X/6X/8X PS/N2 series, TV signal processor-Teletext decoder with embedded -Controller. Final Device Specification, 2002 May 15, Version: 2.11.
  • Page 44 SHARP ELECTRONICA ESPAÑA S.A. PRINTED BY: TV Division Think Ecology, please use Engineering Dept.

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