Service manual

ManualsBrandsSharp ManualsTV19J-M100

21FL94

SHARP CORPORATION

This document has been published to be used for after

sales service only.

The contents are subject to change without notice.

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.

COLOR TELEVISION

Chassis No. GA-4

Page

» ELECTRICAL SPECIFICATIONS .........................................................................................................1

» IMPORTANT SERVICE SAFETY PRECAUTION .................................................................................2

» LOCATION OF USER'S CONTROL .....................................................................................................4

» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................5

» SERVICE MODE ..................................................................................................................................6

» ADJUSTMENT METHOD ...................................................................................................................12

» WAVEFORMS .....................................................................................................................................25

» CHASSIS LAYOUT .............................................................................................................................26

» BLOCK DIAGRAM ..............................................................................................................................27

» DESCRIPTION OF SCHEMATIC DIAGRAM ......................................................................................31

» SCHEMATIC DIAGRAMS ...................................................................................................................32

» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................36

» REPLACEMENT PARTS LIST ............................................................................................................40

» PACKING OF THE SET ......................................................................................................................46

CONTENTS

SPEAKER

SIZE ................................................................... 12 x 5 cm, 2pcs

VOICE COIL IMPEDANCE............................. 16 ohm at 400 Hz

ANTENNA INPUT IMPEDANCE

VHF/UHF ..................................................... 75 ohm Unbalanced

TUNING RANGES

VHF-Channels ...............................................................2 thru 13

UHF-Channels ............................................................14 thru 69

CATV Channels ...........................................................1 thru 125

(EIA, Channel Plan U.S.A.)

POWER INPUT ....................................... AC 110~220 V, 50/60 Hz

POWER RATING .................................................................... 90W

PICTURE SIZE .......................................... 1,239 cm

(192sq inch)

CONVERGENCE ............................................................. Magnetic

SWEEP DEFLECTION .................................................... Magnetic

FOCUS .................................................. QFP/UNI-B1 Electrostatic

INTERMEDIATE FREQUENCIES

Picture IF Carrier Frequency ..................................... 45.75 MHz

Sound IF Carrier Frequency ...................................... 41.25 MHz

Color Sub-Carrier Frequency .................................... 42.17 MHz

(Nominal)

AUDIO POWER

OUTPUT RATING ........................................ 4.0 W(RMS) x 2pcs

Specifications are subject to change without

prior notice.

ELECTRICAL SPECIFICATIONS

MODEL

SERVICE MANUAL

21FL94

S64T921FL94//

Summary of content (48 pages)

PAGE 1
21FL94 SERVICE MANUAL S64T921FL94// COLOR TELEVISION Chassis No. GA-4 MODEL 21FL94 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. CONTENTS Page » ELECTRICAL SPECIFICATIONS ......................................................................................................... 1 » IMPORTANT SERVICE SAFETY PRECAUTION ....................................
PAGE 2
1FL94 IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow: WARNING X-RADIATION AND HIGH VOLTAGE LIMITS 1. For continued safety, no modification of any circuit should be attempted. 2. Disconnect AC power before servicing. 3. Semiconductor heat sinks are potential shock hazards when the chassis is operating. 4.
PAGE 3
21FL94 IMPORTANT SERVICE SAFETY PRECAUTION (Continued) • Connect the resistor connection to all exposed metal parts having a return to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor. AII checks must be repeated with the AC line cord plug connection reversed. (If necessary, a nonpolarized adapter plug must be used only for the purpose of completing these check.) Any current measured must not exceed 0.
PAGE 4
21FL94 LOCATION OF USER'S CONTROL 4
PAGE 5
21FL94 INSTALLATION AND SERVICE INSTRUCTIONS Note: (1) When performing any adjustments to resistor controls and transformers use non-metallic screwdrivers or TV alignment tools. (2) Before performing adjustments, the TV set must be on at least 15 minutes. CIRCUIT PROTECTION HIGH VOLTAGE CHECK The receiver is protected by a 3.15A fuse (F701), mounted on PWB-A, wired into one side of the AC line input.
PAGE 6
21FL94 SERVICE MODE Service Mode Overview 1. 2. 3. 4. 5. Service mode is entered by SERVICE key input or CH-UP +VOL-DOWN input during reset. Service mode is cleared by entering SERVICE key command during service mode. If key input port (SERVICE) input is LOW, then it is in service mode. During key input port (SERVICE) input is LOW, clearing service mode by key input SERVICE is disabled.
PAGE 7
21FL94 Adjustment Mode Items No.
PAGE 8
21FL94 Ë SELF ADJUSTMENT H-VCO 1. 2. 3. 4. 5. 6. 7. When there is H-VCO self-adjustment key input for adjustment item H-VCO, self-adjustment is performed. H-FREE(1chip) is set to 1. H-OUT is set by intelligent monitor output. IM input is set as TIM input. H-VCO(1chip) data is changed so that the number of input pulse is 125 inside 8ms interval. When adjustment completed, OSD display and H-VCO self-adjustment status data of EEPROM are updated.
PAGE 9
21FL94 Setting Mode Items No.
PAGE 10
21FL94 Setting Mode Items (Continued) No.
PAGE 11
21FL94 Option Mode Items No 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029 030 OPTION FUNCTION DEMO DOWNLOAD V-CHIP SPEAKER FAO P.
PAGE 12
21FL94 ADJUSTMENT METHOD Caution: to get into the service mode, one of the ways is press direct key for service items.
PAGE 13
21FL94 Second Stage Data Service Mode F01 VIDEO TONE -GAIN (TV) F02 VIDEO TONE -GAIN (AV) F03 VIDEO TONE -GAIN (S-AV) F04 VIDEO TONE -GAIN(YUV) F05 ABCL F06 BS F07 ABCL-G F08 SHP-AV F09 SHP-SAV F10 SHP-YUV F11 RGB-CLIP F12 E-SAVE F13 FAO-VOL F14 PIF-G F15 Y-DELAY(TV) F16 Y-DELAY(AV) F17 Y-DELAY(SAV) F18 Y-DELAY(YUV) F19 TINT-AV F20 TINT-SAV F21 COL-AV F22 COL-SAV F23 R-DRI(R2) F24 R-DRI( R) F25 R-DRI(B) F26 B-DRI(R2) F27 B-DRI( R) F28 B-DRI(B) F29 V-FREE F30 GAMMA F31 TRAP(TV) F32 TRAP(AV) F33 H-FREE F34 1
PAGE 14
21FL94 Second Stage (Continued) Data F57 F58 F59 F60 F61 F62 F63 F64 F65 F66 F67 F68 F69 F70 Service Mode CP CC LEVEL OSD POS OFFSET-ADJ-COL OFFSET-ADJ-TINT OFFSET-ADJ-TINT-YUV TIMER4-LOW SPEED TIMER4-HIGH SPEED R-CUT-YUV G-CUT-YUV B-CUT-YUV R-DRI-YUV B-DRI-YUV CLOCK-ADJ Third Stage Data OPTION FUNCTION 001 DEMO 002 DOWNLOAD 003 V-CHIP 004 SPEAKER 005 FAO 006 P.
PAGE 15
HISTORY OF REVISION ADJUSTMENT PROCEDURE 001 002 0 0 1 1 1 SYMBOL DEF 21FL94 FUNCTION 21FL94 FUNCTION 1 AV3 1 AV2 1 MTS 1 1 0 A-IN CLOCK LED 023 024 025 1 AV 013 014 015 016 017 018 1 15-1 REVISED CONTENT, 1 1 0 0 FLAT BASS DSE 026 027 028 1 TONE AUTO LAN 011 → ”0”=FAV-COL “1”=COL-TEMP 018 → “0”=ENGLISH “1”=SPANISH 019 → “0”=NO SET UP “1”=AUTO SETUP 025 → “0”=SEMEX SPEC “1”=SPC SPEC 0 022 COMB 021 0 1 1 012 COMP 011 FAV-COL 1 FAO P.
PAGE 16
US 4 CH LION HEAD (MONOSCOPE) AC 220V, US MAGNETIC FIELD CONFIRMATION BY CRT SCREEN CONTENT INPUT CONDITION OUTPUT 16 HISTORY OF REVISION ADJUSTMENT PROCEDURE OPTION SET UP, BUS SET UP, CRT-PURITY PRE-ADJUST REQUIREMENT 0-31 AC 220V CONFIRMATION BY CRT SCREEN INPUT CONDITION OUTPUT 16-1 HISTORY OF REVISION 16-2 REVISED CONTENT, SYMBOL REVISED CONTENT, SYMBOL ADJUSTMENT PROCEDURE US 4 CH LION HEAD CONTENT [CHECKING SPEC] OVERSCAN 10 ± 2.
PAGE 17
US 4 CH LION HEAD (MONOSCOPE PATTERN) 220V, RF INPUT, ZERO MAGNETIC FIELD CONFIRMATION ON CRT SCREEN CONTENT INPUT CONDITION OUTPUT 17 HISTORY OF REVISION ADJUSTMENT PROCEDURE OPTION SET UP, BUS SET UP, CRT-PURITY PRE-ADJUST REQUIREMENT 0-7 US 4 CH LION HEAD AC 220V CONFIRMATION ON CRT DISPLAY.
PAGE 18
NO SIGNAL (RASTER) CONDITION AC 220V IC 801 PIN 11 CONTENT INPUT CONDITION OUTPUT 18 HISTORY OF REVISION ADJUSTMENT PROCEDURE OPTION SET UP, BUS SET UP PRE-ADJUST REQUIREMENT 0-7 SYMBOL 18-1 REVISED CONTENT, [CHECKING SPEC] FREQ = 15.735 ± 0.
PAGE 19
TUNER AGC TERMINAL (TP 201) OR CRT DISPLAY CONFIRMATION OUTPUT 19 HISTORY OF REVISION ADJUSTMENT PROCEDURE INPUT CONDITION RF INPUT FIELD STRENGTH 53dBµV (FIX) INPUT CONDITION 19-1 19-2 REVISED CONTENT, SYMBOL HISTORY OF REVISION SYMBOL REVISED CONTENT, 0-255 1) IN SERVICE MODE, SET V04&V11&V12&V13 TO 127; V14&V15 TO 64, GET IN Y-MUTE BY R/C AND SET V19 TO “1”, PICTURE APPEAR IN CUT-OFF CONDITION 2) ADJUST THE SCREEN SO THAT CUT-OFF LINE APPEAR IN LOW BRIGHT, THEN JUDGE THAT WHETHER THE CUT-O
PAGE 20
23CH 501RE WINDOW PATTERN 220V CRT SCREEN DISPLAY. CONTENT INPUT CONDITION OUTPUT 20 HISTORY OF REVISION ADJUSTMENT PROCEDURE OPTION SET UP, BUS SET UP, SCREEN PRE-ADJUST REQUIREMENT 0-127, 0~255 SYMBOL 20-1 REVISED CONTENT, [CHECKING CONFIRMATION] X=0.273, Y=0.
PAGE 21
WINDOW PATTERN 220V CRT SCREEN DISPLAY.
PAGE 22
R-AMP TR BASE (TP851) CONFIRRM WITH OSCILLOSCOPE OUTPUT 22 HISTORY OF REVISION ADJUSTMENT PROCEDURE OUTPUT 220V INPUT CONDITION Y SYMBOL 22-1 REVISED CONTENT, [CHECKING CONFIRMATION] W G 100% WHITE Cy Mg R B *PLEASE TAKE NOTE THAT SERVICE DATA F60 MUST SET TO +10 1) SET THE V03 BUS DATA TO GET A WAVEFORM AS BELOW 2) THIS WAVEFORM SHOWS THAT THE 75% WHITE & RED PORTIONS OF COLOR BAR BEAT AT THE SAME LEVEL INPUT CONDITION US 10 CH HALF COLOR BAR PATTERN CONTENT HISTORY OF REVISION AD
PAGE 23
AC 220V, RF INPUT CRT ANODE VOLTAGE INPUT CONDITION OUTPUTΩ 23 HISTORY OF REVISION ADJUSTMENT PROCEDURE US 4 CH LION HEAD (MONOSCOPE PATTERN) CONTENT – SYMBOL 23-1 REVISED CONTENT, [CAUTION POINT] USE ELECTROSTATIC HI-VOLTAGE METER AND FOLLOW THE UL/ DHHS STANDARD TO MAKE CORRECTION AND CONTROL. BELOW 30kV HIGH VOLTAGE SET THE USER CONTROL TO SHIPMENT SETTING POSITION. PUSH ON Y-MUTE BY R/C CONFIRM THE VOLTAGE OF CRT ANODE BY HIGH VOLTAGE METER AND MAKE SURE THE READING IS AS BELOW.
PAGE 24
STEREO SIGNAL SIGNAL 1,: MODULATION 30%, L-CH ONLY, NR-ON, 300Hz SIGNAL 2,: MODULATION 30%, L-CH ONLY, NR-ON, 3kHz RF INPUT IC 3001 39 PIN CONTENT INPUT CONDITION OUTPUT 24 HISTORY OF REVISION ADJUSTMENT PROCEDURE OPTION SET UP, BUS SET UP, VCO ADJ, RF-AGC, MS-LEVEL, MTS-VCO, FILTER PRE-ADJUST REQUIREMENT SYMBOL 24-1 REVISED CONTENT, [CHECKING SPEC] OVER 25 dB (CHECKING SPEC : OVER 20 dB) SET THE SOUND VOLUME TO MAXIMUM THEN MAKE SURE THE READING FROM THE SPEAKER TERMINAL MUST BE OVER THE SPE
PAGE 25
21FL94 WAVEFORMS 25
PAGE 26
21FL94 CHASSIS LAYOUT H G F E D C B A 1 2 3 4 26 5 6
PAGE 27
21FL94 CRT BLOCK DIAGRAM H G F E D C B A 1 2 3 4 27 5 6
PAGE 28
21FL94 MAIN BLOCK DIAGRAM J I H G F E D C B A 1 2 3 4 5 6 28 7 8 9 10
PAGE 29
21FL94 10 11 12 13 14 15 29 16 17 18 19
PAGE 30
21FL94 MTS BLOCK DIAGRAM J I H G F E D C B A 1 2 3 4 5 6 30 7 8 9 10
PAGE 31
21FL94 DESCRIPTION OF SCHEMATIC DIAGRAM WAVEFORM MEASUREMENT CONDITIONS: NOTES: 1. The unit of resistance "ohm" is omitted. (K=kΩ=1000Ω, M=MΩ) 2. All resistors are 1/16 watt, unless otherwise noted. 3. All capacitors are µF, unless otherwise noted. (P=pF=µµF) 4. (G) indicates ±2% tolerance may be used. 5. indicates line isolated ground. 1. Photographs taken on a standard gated color bar signal, the tint setting adjusted for proper color.
PAGE 32
21FL94 SCHEMATIC DIAGRAM: MAIN Unit J I H G F E D C B A 1 2 3 4 5 6 32 7 8 9 10
PAGE 33
21FL94 10 11 12 13 14 15 33 16 17 18 19
PAGE 34
21FL94 SCHEMATIC DIAGRAM: CRT Unit H G F E D C B A 1 2 3 4 34 5 6
PAGE 35
21FL94 SCHEMATIC DIAGRAM: MTS Unit H G F E D C B A 1 2 3 4 35 5 6
PAGE 36
21FL94 PRINTED WIRING BOARD ASSEMBLIES H G F E D C B PWB-A: MAIN Unit (Wiring Side) A 1 2 3 4 36 5 6
PAGE 37
21FL94 H RJ 1 4 RJ 1 5 B1 R1 0 2 7 R1 0 2 4 R3 8 4 R3 8 3 R1 0 0 3 R1 0 0 2 R3 8 2 C1 0 1 6 R3 8 1 R1 0 0 9 R1 0 0 8 R1 0 0 6 RJ 1 7 RJ 1 6 R1 0 0 7 RJ 8 F DC1 R1 0 8 3 Z1 A1 Q1 0 7 2 R1 0 5 6 R1 0 7 9 Q1 0 7 0 Q1 0 0 2 R1 0 8 5 G R3 0 0 6 R1 0 7 8 R1 0 8 7 RJ 2 4 I C3 0 0 2 R3 1 4 R3 0 0 9 C3 0 8 1 C3 1 3 R3 1 5 RJ 2 3 R8 2 7 R1 8 4 9 R3 0 5 R8 2 1 Q8 0 5 C3 0 8 R3 0 7 RJ 4 R3 0 3 R3 0 8 RJ 2 6 R1 8 5 0 R8 3 1 Q1 0 7 3 R8 3 9 R1 8 9 5 R1 8 9 6 C8 4 5 R8 3
PAGE 38
21FL94 H G F E D C PWB-B: CRT Unit (Wiring Side) B A 1 2 3 4 38 5 6
PAGE 39
21FL94 H G F E PWB-C: MTS Unit (Wiring Side) D R3 0 0 4 R3 0 0 3 R3 0 2 5 C3 0 4 3 C3 0 0 2 Q3 0 0 4 R3 0 3 5 R3 0 0 5 R3 0 3 0 Q3 0 0 1 R3 0 2 9 R3 0 3 4 R3 0 2 8 Q3 0 0 2 R3 0 3 2 R3 0 2 6 R3 0 2 1 R3 0 2 7 Q3 0 0 5 R3 0 3 1 I C3 0 0 1 C3 0 4 2 R3 0 8 4 R3 0 8 5 C3 0 3 1 C3 0 2 6 R3 0 8 3 R3 0 1 6 C3 0 3 2 C3 0 2 8 C3 0 2 7 C3 0 1 3 R3 0 0 7 C3 0 3 6 R3 0 1 1 C3 0 2 4 C3 0 2 3 R3 0 1 3 C3 0 3 5 RJ 1 0 1 R3 0 1 0 R3 0 1 7 R3 0 1 5 R3 0 0 8 R3 0 1 2 R3 0 3 6 R3
PAGE 40
21FL94 Ref. No. Part No. ★ Description Code REPLACEMENT PARTS LIST Ref. No. Q604 Q751 Q752 Q753 Q754 Q801 Q804 Q805 Q1001 Q1002 Q1073 PARTS REPLACEMENT Replacement parts which have these special safety characteristics are identified in this manual; electrical components having such features are identified by "å" in the Replacement Parts Lists.
PAGE 41
21FL94 Ref. No. Part No. ★ L802 L803 L804 L806 L807 L1861 L1862 VP-DF100K0000Y VP-DF100K0000Y VP-XF150K0000Y VP-DF100K0000Y VP-XF1R2K0000Y VP-XF8R2K0000Y VP-XF8R2K0000Y X X X X X X X Description Peaking, 10µH Peaking, 10µH Peaking, 15µH Peaking, 10µH Peaking, 1.2µH Peaking, 8.2µH Peaking, 8.
PAGE 42
21FL94 Ref. No. Part No.
PAGE 43
21FL94 Part No.
PAGE 44
21FL94 Ref. No. Part No. ★ Description Ref. No.
PAGE 45
21FL94 Ref. No. Part No.
PAGE 46
21FL94 Ref. No. Part No. ★ Description PACKING OF THE SET Ref. No. Code 46 Part No.
PAGE 47
21FL94 Ref. No. Part No. ★ Description Code Ref. No. -MEMO- 47 Part No.
PAGE 48
21FL94 Ref. No. Part No. ★ Description Ref. No. Code Part No. ★ Description Code 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.