21FL91 SERVICE MANUAL SX2U321FL91// COLOR TELEVISION Chassis No. GA-2 MODEL 21FL91 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 .....................................
1FL91 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.
21FL91 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.
21FL91 LOCATION OF USER'S CONTROL 4
21FL91 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.
21FL91 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.
21FL91 Adjustment Mode Items No.
21FL91 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.
21FL91 Setting Mode Items No.
21FL91 Option Mode Items No O01 O02 O03 O04 O05 O06 O07 O08 O09 O10 O11 O12 O13 O14 O15 O16 O17 O18 O19 ITEM DEM0 DOWNLOAD V-CHIP SPEAKER FAO P.PREF UNIV+ VIEW TIMER EZ-SETUP PON-CH FAV-COL COMPONENT AV AV2 MTS TONE-CTRL AUTO-OFF INIT-LANG SETUP-FLAG O20 FR.AV (Front, Rear AV) 0 1 Without DEMO With DEMO Without V-CHIP OP With V-CHIP OP Without V-CHIP With V-CHIP Without SPEAKER With SPEAKER Without FAO With FAO Without P.PREF With P.
21FL91 ADJUSTMENT METHOD Caution: to get into the service mode, one of the ways is press direct key for service items.
21FL91 Second Stage Data F01 F02 F03 F04 F05 F06 F07 F08 F09 F10 F11 F12 F13 F14 F15 F16 F17 F18 F19 F20 F21 F22 F23 F24 F25 F26 F27 F28 F29 F30 F31 F32 F33 F34 F35 F36 F37 F38 F39 F40 F41 F42 F43 F44 F45 F46 F47 F48 F49 F50 F51 F52 F53 F54 Service Mode VIDEO TONE -GAIN (TV) VIDEO TONE -GAIN (AV VIDEO TONE -GAIN(YUV) ABCL BS ABCL-G SHP-AV SHP-YUV SHP-CLIP E-SAVE FAO-VOL PIF-G Y-DELAY(TV) Y-DELAY(AV) Y-DELAY(YUV) TINT-AV COL-AV R-DRI(R2) R-DRI( R) R-DRI(B) B-DRI(R2) B-DRI( R) B-DRI(B) V-FREE GAMMA TRAP(TV)
21FL91 Third Stage Data 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 Service Mode DEMO DOWNLOAD V-CHIP SPEAKER FAO P.PREF UNIV+ VIEW TIMER EZ-SETUP *PON-CH FAV-COL COMPONENT AV AV2 MTS TONE-CTRL AUTO-OFF INIT-LANG SETUP-FLAG AV-FR DATA="0" DEMO DISABLE V-CHIP OP DISABLE V-CHIP DISABLE SPEAKER DISABLE FAO DISABLE P.
ADJUSTMENT PROCEDURE 14 001 002 0 0 1 1 FAO 1 DEF 21FL91 FUNCTION 1 1 AV 1 MTS 1 14-1 019 → “0”=NO SET UP “1”=AUTO SETUP 1 1 TONE AUTO LAN 016 017 018 “1”=COL-TEMP “1”=SPANISH 1 AV2 013 014 015 011 → ”0”=FAV-COL 018 → “0”=ENGLISH 1 COMP FAV-COL 1 012 011 1 P.
US 4 CH LION HEAD (MONOSCOPE) AC 220V, MEXICO MAGNETIC FIELD CONFIRMATION BY CRT SCREEN CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE OPTION SET UP, BUS SET UP, CRT-PURITY PRE-ADJUST REQUIREMENT 0-31 15 15-1 [CHECKING SPEC] LEFT AND RIGHT SYMMETRICAL A B 1. ADJUST THE V07 BUS DATA TO HAVE A BALANCE POSITION TO SPEC OF A=B. 2.
US 4 CH LION HEAD (MONOSCOPE PATTERN) 220V, RF INPUT, ZERO MAGNETIC FIELD CONFIRMATION ON CRT SCREEN CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE OPTION SET UP, BUS SET UP, CRT-PURITY PRE-ADJUST REQUIREMENT 0-7 16 16-1 [CHECKING CONFIRMATION] ADJUST V06 BUS DATA TO HAVE MOST ACCEPTABLE VERTICAL POSITION.
NO SIGNAL (RASTER) CONDITION AC 220V IC 801 PIN 11 CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE OPTION SET UP, BUS SET UP PRE-ADJUST REQUIREMENT 0-7 17 [CHECKING SPEC] FREQ = 15.735 ± 0.
TUNER AGC TERMINAL (TP 201) OR CRT DISPLAY CONFIRMATION OUTPUT ADJUSTMENT PROCEDURE INPUT CONDITION RF INPUT FIELD STRENGTH 53dBµV (FIX) INPUT CONDITION 18 [CHECKING SPEC] MAX - 0.1V dc 18-1 (AT MANUAL ADJUSTMENT MODE) 1. ADJUST THE V08 BUS DATA UNTIL AGC TERMINAL VOLTAGE BECOME MAXIMUM, THEN DROP 0.1V BELOW MAXIMUM VOLTAGE. 2. CHANGE THE ANTENNA INPUT SIGNAL TO 63-67 dBµV, AND MAKE SURE THERE IS NO NOISE 3.
23CH 501RE WINDOW PATTERN 220V CRT SCREEN DISPLAY. CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE OPTION SET UP, BUS SET UP, SCREEN PRE-ADJUST REQUIREMENT 0-127, 0~255 19 19-1 [CHECKING CONFIRMATION] X=0.273, Y=0.
WINDOW PATTERN 220V CRT SCREEN DISPLAY. CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE OPTION SET UP, BUS SET UP, SCREEN, WHITE BALANCE, SUB-BRIGHTNESS PRE-ADJUST REQUIREMENT 20 20-1 [VOLTAGER CONFIRMATION] BRIGHTNESS Y=150 cd/m2 WHITE US14 1) LET THE GUN POINT AT WHITE POSITION (AS ATTACH DRAWING), ADJUST V01 BUS DATA UNTIL BRIGHTNESS Y=150 cd/m2.
R-AMP TR BASE (TP851) CONFIRRM WITH OSCILLOSCOPE OUTPUT ADJUSTMENT PROCEDURE OUTPUT 220V INPUT CONDITION 21 Y 21-1 [CHECKING CONFIRMATION] W G 100% WHITE Cy Mg R B *PLEASE TAKE NOTE THAT SERVICE DATA F52 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 ADJUSTMENT PROCEDURE CONTENT PRE-ADJUST REQUIREMENT OPTION SET UP, B
AC 220V, RF INPUT CRT ANODE VOLTAGE INPUT CONDITION OUTPUTΩ ADJUSTMENT PROCEDURE US 4 CH LION HEAD (MONOSCOPE PATTERN) CONTENT – 22 22-1 [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. AFTER ALL ADJUSTMENT FINISHED.
SIGNAL WITHOUT NOISE (SIGNAL WITHOUT SOUND MODULATION) AC 200V IC 3001 39 PIN CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE OPTION SET UP, BUS SET UP, VCO ADJ, RF-AGC PRE-ADJUST REQUIREMENT 23 23-1 [CHECKING SPEC] 62.94 ± 0.75kHz (CHECKING SPEC : 62.94 ± 1.20kHz) 1) CONNECT 100 µ F ELECTROLLYTIC CAPACITOR BETWEEN C3005 (-ve)-GND 2) ADJUST THE BUS DATA M02 UNTIL THE OUTPUT FREQUENCY OF 39 PIN BECOME AS SPECIFIED BELOW. NOTE: TO MINIMIZE THE PRODUCTION TIME, ITEM 1) CAN IGNORE.
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 ADJUSTMENT PROCEDURE OPTION SET UP, BUS SET UP, VCO ADJ, RF-AGC, MS-LEVEL, MTS-VCO, FILTER PRE-ADJUST REQUIREMENT 24 24-1 [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 SPEC AS SPECIFIED BELOW.
21FL91 -MEMO- 25
21FL91 CHASSIS LAYOUT H G F E D C B A 1 2 3 4 26 5 6
21FL91 CRT BLOCK DIAGRAM H G F E D C B A 1 2 3 4 27 5 6
21FL91 21FL91 MAIN BLOCK DIAGRAM J I H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 28~29 12 13 14 15 16 17 18 19 20
21FL91 21FL91 MTS BLOCK DIAGRAM J I H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 30~31 12 13 14 15 16 17 18 19 20
21FL91 DESCRIPTION OF SCHEMATIC DIAGRAM WAVEFORM MEASUREMENT CONDITIONS: 1. Photographs taken on a standard gated color bar 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. signal, the tint setting adjusted for proper color.
21FL91 SCHEMATIC DIAGRAM: CRT Unit H G F E D C B A 1 2 3 4 33 5 6
21FL91 21FL91 SCHEMATIC DIAGRAM: MAIN Unit J I H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 34~35 12 13 14 15 16 17 18 19 20
21FL91 21FL91 SCHEMATIC DIAGRAM: MTS MODULE Unit J I H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 36~37 12 13 14 15 16 17 18 19 20
21FL91 PRINTED WIRING BOARD ASSEMBLIES H G F E D C B PWB-A: MAIN Unit (Wiring Side) A 1 2 3 4 38 5 6
21FL91 H RJ 4 0 R1 0 2 6 RJ 4 1 RJ 4 5 RJ 4 3 R3 8 4 R3 8 3 RJ 1 6 R3 8 2 R1 0 0 2 R1 0 0 9 R4 3 1 R1 0 0 7 R4 3 2 RJ 4 6 R1 0 0 6 R1 0 0 8 RJ 4 8 R1 0 2 7 R1 0 0 3 R3 8 1 RJ 6 0 B2 Z1 A1 R3 2 1 G RJ 3 0 F DC2 RJ 7 1 R3 1 5 C3 1 9 C3 1 3 R3 1 3 R3 1 4 RJ 1 1 R3 1 2 RJ 5 9 RJ 7 6 C3 2 0 RJ 9 RJ 0 R3 11 0 RJ 8 RJ 1 3 R3 0 6 R3 0 5 RJ 1 5 F R3 1 6 RJ 2 1 Q3 0 1 Q3 0 2 C3 0 8 R3 0 7 R3 1 7 RJ 1 4 R3 1 0 R3 1 8 R3 0 8 RJ 7 7 R3 0 3 RJ 7 0 RJ 7 4 C7 5 9 R1 0 8 1
21FL91 H G F E D C PWB-B: CRT Unit (Wiring Side) B A 1 2 3 4 40 5 6
21FL91 H G F PWB-E: MTS MODULE Unit (Wiring Side) E R3 0 2 4 RJ 1 0 R3 0 8 0 R3 0 2 5 D RJ 4 R3 0 8 1 Q3 0 0 7 R3 0 1 6 R3 0 0 4 R3 0 0 3 C3 0 0 2 I C3 0 0 2 R3 0 0 5 C3 0 0 8 R3 0 8 5 RJ 1 3 R3 0 8 4 C3 0 8 2 R3 03 RJ 76 RJ 2 Q3 0 0 6 RJ 6 I C3 0 0 1 R3 0 0 7 R3 0 1 9 R3 0 0 8 R3 0 8 2 RJ 1 4 R3 0 0 1 R3 0 0 2 RJ 3 R3 0 1 0 C3 0 1 3 R3 0 1 8 R3 0 8 3 R3 0 2 6 C3 0 3 1 R3 0 2 9 C3 0 3 2 C3 0 2 6 Q3 0 0 4 C3 0 2 8 C3 0 4 3 R3 0 1 1 C3 0 3 3 C3 0 2 3 R3 0 1 3 Q3
21FL91 Ref. No. Part No. ★ Description Code REPLACEMENT PARTS LIST 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. The use of a substitute replacement part which does not have the same safety characteristics as the factory recommended replacement parts shown in this service manual may create shock, fire or other hazards. Ref. No.
21FL91 Part No. ★ L204 L602 L603 å L703 L751 L801 L802 L803 L804 L806 L807 L1861 L1862 VP-XF1R2K0000~ RCiLP0223CEZZ RCiLZA006WJZZ RCiLF0078PEZZ RCiLP0225CEZZ VP-DF100K0000~ VP-DF100K0000~ VP-DF100K0000~ VP-XF150K0000~ VP-DF100K0000~ VP-XF1R2K0000~ VP-XF8R2K0000~ VP-XF8R2K0000~ X X X X X X X X X X X X X å T601 å T602 å T701 RTRNZ0026PEZZ X Transformer RTRNFA012WJZZ X H-Volt Transformer RTRNWA076WJZZ X Transformer Ref. No. Description Peaking, 1.
21FL91 Ref. No. ★ Part No.
21FL91 Ref. No. R754 R755 R756 R759 R766 R767 R768 R802 R803 R804 R805 R806 R807 R808 R810 R812 R814 R815 R816 R817 R818 R823 R824 R826 R827 R828 R829 R830 R831 R832 R833 R835 R836 R838 R839 R840 R841 R842 R843 R844 R845 R1002 R1003 R1006 R1007 R1008 R1009 R1021 R1022 R1023 R1024 R1026 R1027 R1031 R1032 R1034 R1035 R1036 R1037 R1038 R1039 R1040 R1041 R1042 R1043 R1045 R1046 R1047 R1048 R1049 R1051 R1052 R1053 R1054 R1059 R1061 R1062 Part No.
21FL91 Ref. No. ★ Part No. Description DUNTKA599WEA0 PWB-B CRT UNIT TRANSISTORS Q853 Q854 Q855 Q894 VS2SC3789//2E VS2SC3789//2E VS2SC3789//2E VS2SA1015Y/1E+ X X X X 2SC3789 2SC3789 2SC3789 2SA1015Y D859 D898 VHD1SS119//-1~ VHD1SS119//-1~ AB AB AB AB L851 VP-MK820K0000+ X Peaking, 82µH 10% C851 C852 C853 C880 C893 VCKYPA1HB221K+ X VCKYPA1HB221K+ X VCKYPA1HB221K+ X RC-KZ0153CEZZ X VCEA0A1CW336M+ X DIODES X 1SS119 X 1SS119 AA AA COIL AB CAPACITORS 220p 220p 220p 0.
21FL91 Ref. No. Part No. ★ Description Code Ref. No. Part No.
21FL91 Ref. No. Part No. ★ Description PACKING OF THE SET Ref. No. Code 48 Part No.
21FL91 Ref. No. Part No. ★ Description Code Ref. No. -MEMO- 49 Part No.
21FL91 Ref. No. Part No. ★ Description Ref. No. Code Part No. ★ Description Code COPYRIGHT © 2002 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. TQ1456-S Dec.
