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Sharp 21YF30 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 PAL B/G
Ë NTSC (AV THRU)
Ë Full Auto Channel Preset and Auto Channel Skip
Ë 100-CH Program Memory
Ë CATV(Hyper Band) Ready <Used Frequency Synthesizer
Tuner>
Ë Black Stretch Circuit
Ë On Timer/Sleep Timer/Reminder Timer
Ë Blue Back Noise Mute
Ë Front AV IN & Rear AV IN/OUT Terminals
Ë Favourite Channel
» SPECIFICATIONS ............................................. 2
» IMPORTANT SERVICE NOTES ........................ 2
» ADJUSTMENT PRECAUTIONS ........................ 3
» MEMORY MAP ................................................ 14
» TROUBLE SHOOTING TABLE ....................... 30
» WAVEFORMS .................................................. 34
» CHASSIS LAYOUT .......................................... 35
» BLOCK DIAGRAM ........................................... 36
Ë CRT UNIT ..................................................... 41
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

MODEL
FEATURE
Ë Front Headphone Jack
Ë Colour Comb Filter (AV IN)
Ë High Contrast Picture
Ë Hotel Mode
Ë English/Thai Language OSD
Ë Mono Bilingual
Ë White Temperature Adjustment
Ë Component In
Ë Surround Sound Effect(With Bass/Treble/Balance)
Ë AV Stereo
CONTENTS
Page
WARNING

SHARP CORPORATION

COLOUR TELEVISION

Chassis No. GA-2
21YF30
Ë HEADPHONE UNIT ..................................... 41
Ë MAIN UNIT ................................................... 42
Ë S-CONTROL UNIT ....................................... 44
Ë ELECTRICAL PARTS .................................. 51
Ë MISCELLANECOUS PARTS ....................... 56
Ë SUPPLIED ACCESSORIES ......................... 56
Ë PACKING PARTS ......................................... 56
Ë CABINET PARTS ......................................... 57
» PACKING OF THE SET ................................... 58
1
21YF30
S43A221YF30//
Page

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Summary of Contents for Sharp 21YF30

  • Page 1: Table Of Contents

    21YF30 SERVICE MANUAL S43A221YF30// COLOUR TELEVISION Chassis No. GA-2 21YF30 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 Sweep Deflection ..................Magnetic Maintenance and repair of this receiver should be done by qualified Intermediate Frequencies service personnel only. Picture IF Carrier .................. 38.9MHz Sound IF Carrier Frequency SERVICE OF HIGH VOLTAGE SYSTEM AND PIC- 5.74MHz ..................

  • Page 3: Adjustment Precautions

    ADJUSTMENT PRECAUTIONS ADJUSTMENT ITEM ***Below is the adjustment items that we should done, PLS FOLLOW THE PROCEDURE. Otherwise some adjustment items will not be accurate. This model’s setting are adjusted in two different ways: through the I C bus control and in the conventional analog manner.
  • Page 4 After short JA304 & JA307, and turn on the MAIN POWER switch, read data from EEPROM address USER DATA IN SERVICE MODE 00H ~ 03H. Then compare to the list below. If different, initialize the EEPROM. * While SERVICE mode ON, EEPROM DATA will switch to the service data. Also, once SERVICE mode OFF, EEPROM will switch back to previous USER DATA.
  • Page 5 SETTING MODE (SECOND STAGE) SETTING MODE (SECOND STAGE) EEPROM ITEMS DATA LENGTH INITIAL DATA FIX/ADJ/AUTO REMARK EEPROM ITEMS DATA LENGTH INITIAL DATA FIX/ADJ REMARK STRAPQ-BG 1W-TV STRAPQ-I 1W-AV V-FREE (NO SYNC) STRAPQ-DK AFC2 (NO SYNC) STRAPQ-M GAMMA STRAPQ-574 BS-D/C 0~15 C.CLIP-LVL BS-GAIN RGB-CLIP...
  • Page 6 1.) Please set the MCL to MCL4 as follows. OPTION MODE (FOURTH STAGE) 2.) After set the MCL , please set the INITIAL SETTING to INITIAL9. EEPROM ITEMS DATA LENGTH INITIAL DATA REMARK INITIAL9: For Thai (All Channel Sound System are set to B/G) ***HOTEL MODE 0 (0FF) / 1 (0N) OPTION SET UP...
  • Page 7 (1)The following default data has been factory-set for the E2PROM follow by INITIAL DATA selected. CONDITION" before switch to Service Mode for Adjustment. ITEMS DATA SETTING PIF ADJUSTMENT 21YF30 LAST POWER LAST TV/AV MODE TV MODE No. Adjustment point Adjustment procedure/conditions...

  • Page 8: Purity Adjustment

    PURITY ADJUSTMENT CONVERGENCE ADJUSTMENT No. Adjustment point Adjustment procedure/conditions Waveform and others No. Adjustment point Adjustment procedure/conditions Waveform and others PURITY ADJ. 1. Receive the GREEN-ONLY signal. Adjust the 1. Receive the "Crosshatch Pattern" signal. CONVERGENCE beam current to ~700 µ 2.
  • Page 9 H-VCO, VIF-VCO & S-TRAP fo ADJUSTMENT HORIZONTAL, VERTICAL, DEFLECTION LOOP and FOCUS ADJUSTMENT No. Adjustment point Adjustment procedure/conditions Waveform and others No. Adjustment point Adjustment procedure/conditions Waveform and others H-VCO ADJ (MANUAL ADJ) 1) Receive Monoscope Pattern Signal (PAL 50 Hz) H-SHIFT C BUS 1) In No signal (RASTER) condition.
  • Page 10 SCREEN, WHITE BALANCE, SUB-BRIGHTNESS & SUB-CONTRAST (1 ) ADJUSTMENT SCREEN, WHITE BALANCE, SUB-BRIGHTNESS & SUB-CONTRAST (2 ) ADJUSTMENT No. Adjustment point Adjustment procedure/conditions Waveform and others No. Adjustment point Adjustment procedure/conditions Waveform and others SCREEN 1) In window pattern signal condition. NOTE 1: 1) In window pattern signal condition.
  • Page 11 PROTECTOR OPERATION CHECKING PAL CHROMA ADJUSTMENT No. Adjustment point Adjustment procedure/conditions Waveform and others No. Adjustment point Adjustment procedure/conditions Waveform and others BEAM PRO- 1) Receive "Monoscope Pattern" signal. * Select one of Q853/4/5 to do SUB COLOUR 1) Receive the “PAL Color Bar” signal. TECTOR 2) Set CONTRAST MAX.
  • Page 12 FUNCTION OPERATION CHECKING (VIDEO AND AUDIO) FUNCTION OPERATION CHECKING (VIDEO AND AUDIO) CONTINUED No. Adjustment point Adjustment procedure/conditions Waveform and others No. Adjustment point Adjustment procedure/conditions Waveform and others 1) Receive the “PAL COLOUR BAR” signal, press COLOUR CONTRAST 1) Receive "Monoscope Pattern" signal. MENU, choose CH-SETTING to select COLOUR SYSTEM 2) Set MENU, then go into PICTURE mode to se-...
  • Page 13 HEADPHONE JACK CHECKING No. Adjustment point Adjustment procedure/conditions Waveform and others HEADPHONE 1) Receive PAL COLOUR BAR with SOUND 400Hz, OUTPUT 100% MODULATION (±50kHz Dev). CHECKING 2) Maximum volume, and check the headphone output with 400Hz sound and no sound out from speaker.

  • Page 14: Memory Map

    21YF30 MEMORY MAP DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA REMARK EEPROM INITIALIZATION JUDGEMENT BYTE-0 00-FF EEPROM INITIALIZATION JUDGEMENT BYTE-1 00-FF EEPROM INITIALIZATION JUDGEMENT BYTE-2...

  • Page 15: Model 21Yf30

    21YF30 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE REMARK SETTING DATA TUNING FREQUENCY (LOW BYTE) 00-FF POS 28 TUNING FREQUENCY (HIGH BYTE)
  • Page 16 21YF30 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA REMARK TUNING FREQUENCY (LOW BYTE) 00-FF POS 60 TUNING FREQUENCY (HIGH BYTE)

  • Page 17: Model 21Yf30

    21YF30 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA TUNING FREQUENCY (LOW BYTE) 00-FF POS 92 TUNING FREQUENCY (HIGH BYTE)
  • Page 18 21YF30 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA S-SYSTEM (POS0) C-SYSTEM (POS0) 00-34 S-SYSTEM (POS1) C-SYSTEM (POS1) 00-34 S-SYSTEM...
  • Page 19 21YF30 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE REMARK SETTING DATA S-SYSTEM (POS64) C-SYSTEM (POS64) 00-34 S-SYSTEM (POS65) C-SYSTEM (POS65) 00-34 00-34...
  • Page 20 21YF30 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA ROM CORRECTION-1 CODE 00-FF 00-FF ROM CORRECTION-1 CODE 00-FF ROM CORRECTION-1 CODE...
  • Page 21 21YF30 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE REMARK SETTING DATA MODEL MODEL LETTER NO. LETTER NO.
  • Page 22 21YF30 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA REMARK 00-7F R-DRIVE (V00) B-DRIVE (V00) 00-7F R-CUTOFF (V00) 00-FF G-CUTOFF (V00)
  • Page 23 21YF30 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE REMARK SETTING DATA COLOUR-N443 (F32) 00-3E COLOUR-N358 (F33) 00-3E COLUR-ADJ (F34) 00-3E SHARPNESS-AV (F35)
  • Page 24 21YF30 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE REMARK SETTING DATA BS OFF C.CLIP- STrapQ- STrapQ-M STrapQ- STrapQ-I STrapQ- 00-FF CLIP (F08)
  • Page 25 21YF30 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA MODEL MODEL LETTER NO. LETTER NO. *1 0 : individually selectable rating system 1 : threshold selectable rating system...
  • Page 26 21YF30 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA REMARK 00-FF A2 FM A2 ST A2 BIL1 NCM FM NCM ST NCM BIL2 NCM BIL1...
  • Page 27 21YF30 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA A2 FM A2 ST A2 BIL1 NCM FM NCM ST NCM BIL2 NCM BIL1...
  • Page 28 21YF30 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA MODEL MODEL LETTER NO. LETTER NO.
  • Page 29 21YF30 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA REMARK MODEL MODEL LETTER NO. LETTER NO.

  • Page 30: Trouble Shooting Table

    TROUBLE SHOOTING TABLE TROUBLE SHOOTING TABLE (Continued) NO RASTER CIRCUITS TO BE CHECKED: NO PICTURE, NO SOUND » Tuner. » PIF. » Automatic Gain Control. Check F701. Blown out. » (5V), (32V) Power Source. Does the noise level increase at max. Contrast, Brightness and Sound controls ? Replace the fuse.
  • Page 31 TROUBLE SHOOTING TABLE TROUBLE SHOOTING TABLE (Continued) (Continued) NO SPECIFIC COLOUR NEITHER VERTICAL NOR HORIZONTAL SYNCHRONIZATION Is some colour produced in B/W broadcast reception ? CIRCUIT TO BE CHECKED: » Sync. Separator Circuit. Check pins(5), (6), (10) and (11) of IC801. Is the white balance properly Check IC801.

  • Page 32: Solid State Device Base Diagram

    21YF30 SOLID STATE DEVICE BASE DIAGRAM TOP VIEW SIDE VIEW...
  • Page 33 21YF30 - M E M O -...

  • Page 34: Waveforms

    21YF30 WAVEFORMS...

  • Page 35: Chassis Layout

    21YF30 CHASSIS LAYOUT...

  • Page 36: Block Diagram

    21YF30 BLOCK DIAGRAM PWB-A MAIN BLOCK...
  • Page 37 21YF30...
  • Page 38 21YF30 BLOCK DIAGRAM PWB-B CRT BLOCK PWB-C HEADPHONE BLOCK...
  • Page 39 21YF30 PWB-E S-CONTROL BLOCK...

  • Page 40: Description Of Schematic Diagram

    21YF30 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 = Mega ohm). 2. SEMICONDUCTOR HEAT SINKS SHOULD BE REGARDED AS 2.

  • Page 41: Schematic Diagramë Crt Unit

    21YF30 SCHEMATIC DIAGRAM: CRT Unit SCHEMATIC DIAGRAM: HEADPHONE Unit...

  • Page 42: Ë Main Unit

    21YF30 SCHEMATIC DIAGRAM: MAIN Unit...
  • Page 43 21YF30...

  • Page 44: Ë S-Control Unit

    21YF30 SCHEMATIC DIAGRAM: S-CONTROL Unit...

  • Page 45: Printed Wiring Board Assemblies

    21YF30 PRINTED WIRING BOARD ASSEMBLIES PWB-B: CRT Unit (Component Side) PWB-C: HEADPHONE Unit (Component Side) PWB-C: HEADPHONE Unit (Wiring Side)
  • Page 46 21YF30 PWB-A: MAIN Unit (Component Side)
  • Page 47 21YF30...
  • Page 48 21YF30 PWB-A: MAIN Unit (Wiring Side) R1 0 2 7 RJ 4 0 RJ 4 6 RJ 4 3 RJ 1 0 1 RJ 4 5 Q1 0 7 0 R7 6 8 Q1 0 7 1 C7 5 9...
  • Page 49 21YF30 R1 0 0 8 R1 0 0 3 R1 0 0 7 R1 0 0 2 RJ 1 6 R3 8 1 R3 8 2 F DC2 R1 0 0 9 R3 8 3 RJ 1 7 4 R7 6 0...
  • Page 50 21YF30 PWB-E: S-CONTROL Unit (Component Side) PWB-E: S-CONTROL Unit (Wiring Side)

  • Page 51: Replacement Parts Listë Electrical Parts

    21YF30 Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB421WEC3 PARTS LIST PWB-A MAIN UNIT PARTS REPLACEMENT TUNER NOTE: THE PARTS HERE SHOWN ARE SUPPLIED AS AN ReplaCement parts which have these special safety characteristics ASSEMBLY BUT INDEPENDENTLY.
  • Page 52 21YF30 Ref. No. Part No. Description Code Ref. No. Part No. Description Code ∗ D752 RH-DX0302CEZZ R DX0302CE C391 VCKYPA1HB102K+ R 1000p 50V Ceramic D801 RH-EX0613GEZZY R Zener Diode, 5.1V C392 VCQYTA1HM103J+ R 0.01 Mylar ∗ D806 VHD1SS119//-1 R 1SS119...
  • Page 53 21YF30 Ref. No. Part No. Description Code Ref. No. Part No. Description Code ∗ MetalIzed Polypro Film RJ133 VRS-CY1JF000J 1/16W Metal Oxide ∗ C812 VCFYFA1HA224J+ R 0.22 RJ134 VRS-CY1JF000J 1/16W Metal Oxide ∗ MetalIzed Polypro Film RJ135 VRS-CY1JF000J 1/16W Metal Oxide ∗...
  • Page 54 21YF30 Ref. No. Part No. Description Code Ref. No. Part No. Description Code ∗ R502 VRS-VU3AE102J R 1k Metal Oxide R806 VRS-CY1JF222J R 2.2k 1/16W Metal Oxide ∗ R503 VRN-VV3DB1R2J R 1.2 Metal Film R807 VRS-CY1JF222J R 2.2k 1/16W Metal Oxide ∗...

  • Page 55: Ë Miscellanecous Parts

    21YF30 Ref. No. Part No. Description Code Ref. No. Part No. Description Code ∗ R1850 VRS-CY1JF681J R 680 1/16W Metal Oxide CAPACITORS ∗ R1851 VRS-CY1JF101J R 100 1/16W Metal Oxide C851 VCKYPA1HB561K+ R 560p 50V Ceramic ∗ R1852 VRS-CY1JF101J R 100...

  • Page 56: Ë Supplied Accessories

    21YF30 Ref. No. Part No. Description Code Ref. No. Part No. Description Code ∗ C3503 VCKYCY1CF224Z R 0.22 Ceramic ∗ MISCELLANEOUS PARTS C3504 VCKYCY1CF224Z R 0.22 Ceramic ∗ C3505 VCKYCY1CF224Z R 0.22 Ceramic ∗ C3506 VCKYCY1CF224Z R 0.22 Ceramic å...

  • Page 57: Cabinet Parts

    CCABAA261WEA0 Front Cabinet Ass’y Not Available - Front Cabinet — JBTN-A140WJSA Power Button MSPRC0005PEFW R Power Button Spring GCOVAA361WJSA R/C Cover HBDGB0001KJSC R SHARP Badge GDORFA039WJSA Door MSPRPA025WJFW Door Spring HiNDPA343WJZZ Indication Plate CCABBA160WEA0 Rear Cabinet Ass’y Not Available - Rear Cabinet...

  • Page 58: Packing Of The Set

    21YF30 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PACKING OF THE SET...
  • Page 59 21YF30 Ref. No. Part No. Description Code Ref. No. Part No. Description Code...
  • Page 60 Code Ref. No. Part No. Description Code COPYRIGHT © 2003 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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