Sharp 21FL91, Service Manual

Page 1: ...S 33 PRINTED WIRING BOARD ASSEMBLIES 38 REPLACEMENT PARTS LIST 42 PACKING OF THE SET 48 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 95W PICTURE SIZE 1 239 cm2 192s...

Page 2: ...es not exceed the specified value and that it is regulating correctly 5 Do not use a picture tube other than that specified or make unrecommended circuit modifications to the high voltage circuitry 6 When trouble shooting and taking test measurements on a receiver with excessive high voltage avoid being unnecessarily close to the receiver Do not operate the receiver longer than is necessary to loc...

Page 3: ...led by a 0 15µF capacitor in series with all exposed metal cabinet parts and a known earth ground such as electrical conduit or electrical ground connected to earth ground Use an AC voltmeter having with 5000 ohm per volt or higher sensitivity to measure the AC voltage drop across the resistor BEFORE RETURNING THE RECEIVER Fire Shock Hazard Before returning the receiver to the user perform the fol...

Page 4: ...4 21FL91 LOCATION OF USER S CONTROL ...

Page 5: ... If the operation of the horizontal oscillator does not stop in step 5 the circuit must be repaired before the set is returned to the customer HIGH VOLTAGE CHECK High voltage is not adjustable but must be checked to verify that the receiver is operating within safe and efficient design limitations as specified checks should be as follows 1 Connect an accurate high voltage meter between ground and ...

Page 6: ... by key input MENU SERVICE MODE 6 AFT processing is disabled during service mode PLL setting data is set to fo data 7 All user data are set to default during service mode FAO and SPEAKER user settings are off and on respectively in service mode Energy Save is off 8 Sleep timer View timer and Off timer are inactivated in Service mode 9 Sound is muting in service mode except at Adjustment Items V20 ...

Page 7: ...F VCO 0 63 32 V11 R CUTOFF 1 Chip R CUTOFF 0 255 127 V12 G CUTOFF 1 Chip G CUTOFF 0 255 127 V13 B CUTOFF 1 Chip B CUTOFF 0 255 127 V14 R DRIVE 1 Chip R DRIVE 0 127 64 V15 B DRIVE 1 Chip B DRIVE 0 127 64 V16 SUB COLOR YUV 1 Chip COLOR 0 127 64 V17 SUB TINT YUV 1 Chip BASEBAND TINT 0 127 64 V18 CC POS MICON 0 255 32 V19 Vertical mode 1 Chip V MUTE SERVICE 0 1 2 0 V20 SUB VOL 1 Chip A ATT 0 127 127 V...

Page 8: ... value 5 Increase RF AGC 1chip data when AFT input voltage is at max 0 3V point adjustment is completed 6 When adjustment completed OSD display and RF AGC self adjustment status data of EEPROM are updated 7 Intelligent monitor output and IM input mode are recovered PIF VCO 1 When there is PIF VCO self adjustment key input for adjustment item PIF VCO self adjustment is performed 2 VIF DEF 1chip is ...

Page 9: ...OFFSET B DRI OFFSET 32 32 0 F23 B DRI B OFFSET B DRI OFFSET 32 32 0 F24 V FREE 1chip V FREE 0 1 0 F25 GAMMA 1chip GAMMA 0 3 0 F26 TRAP TV 1chip TRAP FINE 0 3 2 F27 TRAP AV 1chip TRAP FINE 0 3 2 F28 H FREE 1chip H FREE 0 1 0 F29 1W TV 1chip V Window 0 1 0 F30 1W AV 1chip V Window 0 1 0 F31 YLPF 1chip YSW LPF 0 1 1 F32 BS D 1chip BS DISCHARGE 0 3 0 F33 BS C 1chip BS CHARGE 0 3 0 F34 SL TV 1chip S SL...

Page 10: ...t VIEW TIMER With VIEW TIMER 1 O09 EZ SETUP EZ SETUP AUTO PRESET 1 O10 PON CH Without POWER ON With POWER ON 1 O11 FAV COL FAV COL COL TEMP 1 O12 COMPONENT Without COMPONENT With COMPONENT 1 O13 AV Without AV With AV 1 O14 AV2 AV1 system AV2 system 1 O15 MTS Without MTS With MTS 1 O16 TONE CTRL Without S ADJ With S ADJ 1 O17 AUTO OFF Without AUTO OFF With AUTO OFF 1 O18 INIT LANG ENGLISH SPANISH 0...

Page 11: ...SUB PICTURE CONTRAST 0 127 127 V02 SUB TINT TINT 0 127 64 V03 SUB COLOR COLOR 0 127 64 V04 SUB BRIGHT BRIGHT 0 255 128 V05 SUB SHARP VIDEO TONE 0 63 32 V06 V SHIFT V SHIFT 0 7 4 V07 H SHIFT H PHASE 0 31 16 V08 RF AGC RF DELAY 0 127 127 V09 V SIZE V SIZE 0 63 32 V10 PIF VCO VIF VCO 0 63 32 V11 R CUTOFF R CUTOFF 0 255 127 V12 G CUTOFF G CUTOFF 0 255 127 V13 B CUTOFF B CUTOFF 0 255 127 V14 R DRIVE R ...

Page 12: ...ET 32 32 0 F22 B DRI R B DRI OFFSET 32 32 0 F23 B DRI B B DRI OFFSET 32 32 0 F24 V FREE V FREE 0 1 0 F25 GAMMA GAMMA 0 3 0 F26 TRAP TV TRAP FINE 0 3 2 F27 TRAP AV TRAP FINE 0 3 2 F28 H FREE H FREE 0 1 0 F29 1W TV V WINDOW 0 1 0 F30 1W AV V WINDOW 0 1 0 F31 YLPF YSW LPF 0 1 1 F32 BS D BS DISCHARGE 0 3 0 F33 BS C BS CHARGE 0 3 0 F34 SL TV S SLICE DOWN 0 3 0 F35 SL AV S SLICE DOWN 0 3 0 F36 SL YUV S ...

Page 13: ...BLE ON 1 007 UNIV UNIV DISABLE ON 1 008 VIEW TIMER VIEW TIMER DISABLE ON 1 009 EZ SETUP EZ SETUP AUTO PRESET 1 010 PON CH POWER ON DISABLE ON 1 011 FAV COL FAV COL COL TEMP 1 012 COMPONENT COMPONENT DISABLE ON 1 013 AV AV DISABLE ON 1 014 AV2 AV2 DISABLE ON 1 015 MTS MTS DISABLE ON 1 016 TONE CTRL S ADJ DISABLE ON 1 017 AUTO OFF AUTO OFF DISABLE ON 1 018 INIT LANG ENGLISH SPANISH 0 019 SETUP FLAG ...

Page 14: ... COL TEMP 018 0 ENGLISH 1 SPANISH 019 0 NO SET UP 1 AUTO SETUP OPTION SET UP REFER AS BELOW STEP RANGE REFER AS BELOW 21FL91 OSD CHECKING DATA SETUP FOR FIRST AND SECOND STAGE SERVICE DATA DATA SETUP FOR FIRST AND SECOND STAGE SERVICE DATA BUS SET UP REFER AS BELOW STEP RANGE REFER AS BELOW 21FL91 OSD CHECKING ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE ADJUST REQUIREMENT CONTENT INPUT CONDITI...

Page 15: ...PEC OF A B 2 IF CANNOT MAKE IT TO A B ADJ FROM THE BEST POINT SO THAT B SLIDELY SMALLER THAN A CHECKING SPEC LEFT AND RIGHT SYMMETRICAL A B ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE ADJUST THE V09 BUS DATA UNTILL THE OVERSCAN BECOME AS SPECIFIED BELOW CAUTION PLEASE AGING TV MORE THAN 10 MINUTES BEFORE ADJUSTMENT V SIZE V...

Page 16: ... THE MONOSCOPE PATTERN SHOULD BE BALANCE IN VERTICAL POSITION NOTE THE DATA FOR V06 LIMIT AT 04 EVEN POSITION GOOD ENOUGH CHECKING CONFIRMATION ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE 1 BY SELECTING THE V18 BOX BLK TEXT WILL BE APPEARED 2 ADJUST THE V18 BUS DATA TO HAVE A BALANCE POSITION TO SPEC OF A B CLOSED CAPTION S...

Page 17: ...N OUTPUT ADJUSTMENT PROCEDURE ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE AT SELF ADJUSTMENT MODE 1 GO INTO SERVICE MODE BY SELECTING THE SERVICE DATA V10 2 PRESS THE R C FOR AUTO PIF VCO KEY OSD APPEAR OK AT SCREEN 3 IF APPEAR NG PLS REPEAT STEP2 AT MANUAL ADJUSTMENT MODE 1 GO INTO SERVICE MODE BY SELECTING THE SERVICE DAT...

Page 18: ...RE THAT THERE IS NO CROSS MODULATION BEAT CHECKING SPEC MAX 0 1V dc ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE 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 WH...

Page 19: ...THE GUN POINT AT BLACK POSITION IF THE VALUE SHIFTED AWAY FROM THE DATA ADJUSTED IN STEP 1 ADJUST AGAIN THE TWO SERVICE DATA WHICH HAVE CHOSEN AT SCREEN ADJUST SO THAT TO OBTAIN THE SIMILAR AXIS AS ABOVE WARNING DO NOT DISTURB THE MINI STEP GUN DATA DURING THIS ADJUSTMENT REPEAT STEP 1 2 TO GET A REGULATED POSITION CHECKING CONFIRMATION X 0 273 Y 0 280 11 600 K 1 MPCD BLACK US14 WHITE ADJUSTMENT I...

Page 20: ...LE DATA FOR V01 IS 90 EVEN Y CAN T MATCH THE SPEC VOLTAGER CONFIRMATION BRIGHTNESS Y 150 cd m2 US14 WHITE ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE 1 GET IN Y MUTE FUNCTION BY R C 2 ADJUST THE V02 BUS DATA TO GET A WAVEFORM AS BELOW 3 DISABLE THE Y MUTE PLS TAKE NOTE THAT SERVICE MODE DATA F53 NEED TO SET 8 SUB TINT V02 S...

Page 21: ...PMENT POSITION VOLTAGE CONFIRMATION CHECK THE VOLTAGE OF P603 PIN 3 AS SPECIFIED BELOW OPERATION CONFIRMATION SUPPLY THE DC VOLTAGE TO P603 PIN 3 AND MAKE SURE THE PRO TECTOR IS FUNCTIONED HORIZONTAL OSCILATION STOP AND PICTURE DISAPPEAR RECOVER INFORMATION PULL OUT THE AC CORD CAUTION FROM THE RECOVER CONFIRMATION MENTIONED ABOVE THE AC CODE MUST BE PULLED OUT AT LEAST 4 SECOND BEFORE PLUG GING I...

Page 22: ...D CONTROL ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUTΩ ADJUSTMENT PROCEDURE HIGH VOLTAGE BELOW 30kV ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE 1 SET THE SOUND VOLUME CONTROL MORE THAN 1 2 ADJUST BUS DATA OF M01 UNTIL THE VOLTAGE OF 39 PIN BE COME AS SPECIFIED BELOW MS L...

Page 23: ... BUS CONTROL OPTION SET UP BUS SET UP VCO ADJ RF AGC SIGNAL WITHOUT NOISE SIGNAL WITHOUT SOUND MODULATION AC 200V IC 3001 39 PIN CHECKING SPEC 62 94 0 75kHz CHECKING SPEC 62 94 1 20kHz ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE 1 ADJUST M03 DATA UNITILL OK DISPLAY ON SCREEN ADJUST THE BUS DATA IN CENTRE OF THE RANGE FILTER...

Page 24: ...ROM THE SPEAKER TERMINAL MUST BE OVER THE SPEC AS SPECIFIED BELOW SEPARTION ADJUSTMENT M04 M05 STEP RANGE 0 63 I 2 C BUS CONTROL OPTION SET UP BUS SET UP VCO ADJ RF AGC MS LEVEL MTS VCO FILTER 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 CHECKING SPEC OVER 25 dB CHECKING SPEC OVER 20 dB ADJUSTMENT ITEM ADJUSTMENT POS...

Page 25: ...21FL91 25 M E M O ...

Page 26: ...26 21FL91 6 5 4 3 2 1 A B C D E F G H CHASSIS LAYOUT ...

Page 27: ...27 21FL91 6 5 4 3 2 1 A B C D E F G H CRT BLOCK DIAGRAM ...

Page 28: ...21FL91 21FL91 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J MAIN BLOCK DIAGRAM 28 29 ...

Page 29: ...21FL91 21FL91 30 31 MTS BLOCK DIAGRAM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J ...

Page 30: ...oltages measured with 1000µ V B W or Color signal WAVEFORM MEASUREMENT CONDITIONS 1 Photographs taken on a standard gated color bar signal the tint setting adjusted for proper color The wave shapes at the red green and blue cathodes of the picture tube depend on the tint color level and picture control 2 indicates waveform check points See chart waveforms are measured from point indicated to chass...

Page 31: ...33 21FL91 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM CRT Unit ...

Page 32: ...21FL91 21FL91 34 35 SCHEMATIC DIAGRAM MAIN Unit 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J ...

Page 33: ...21FL91 21FL91 SCHEMATIC DIAGRAM MTS MODULE Unit 36 37 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J ...

Page 34: ...38 21FL91 6 5 4 3 2 1 A B C D E F G H PRINTED WIRING BOARD ASSEMBLIES PWB A MAIN Unit Wiring Side ...

Page 35: ...1 0 5 1 D1 0 8 5 D1 0 8 6 C1 0 1 0 C1 0 0 9 R8 1 4 R1 0 6 1 R1 0 4 6 R1 0 4 8 R1 0 4 9 R1 0 6 0 Q8 0 3 R1 0 6 2 R1 0 4 7 F DC3 C1 8 5 5 R1 0 6 3 C8 1 5 I C1 0 0 1 R8 4 2 R8 1 1 R8 1 3 C8 1 6 C8 1 4 R8 1 0 R1 0 3 3 R1 0 6 6 C8 1 3 R1 0 6 7 C8 1 2 C8 1 1 R1 0 6 9 R8 0 7 R8 3 8 R1 0 6 4 R1 0 6 5 R1 0 7 1 RJ 3 3 D8 1 2 R1 0 6 8 D8 1 1 R1 8 5 3 RJ 6 9 R1 0 3 7 D1 0 9 0 R8 0 6 R1 0 7 0 R1 0 3 6 D1 0 8 8...

Page 36: ...40 21FL91 6 5 4 3 2 1 A B C D E F G H PWB B CRT Unit Wiring Side ...

Page 37: ... 1 6 C3 0 0 2 R3 0 0 3 C3 0 2 3 C3 0 2 4 R3 0 0 4 C3 0 2 6 C3 0 3 1 C3 0 2 5 C3 0 2 8 C3 0 3 2 C3 0 3 3 C3 0 2 7 RJ 9 R3 0 0 2 R3 0 3 6 RJ 2 RJ 7 R3 0 0 1 RJ 1 4 RJ 1 5 RJ 1 3 R3 0 3 3 RJ 8 R3 0 8 4 Q3 0 0 7 R3 0 8 5 Q3 0 0 6 R3 0 8 3 R3 0 8 2 Q3 0 0 4 R3 0 3 4 R3 0 1 6 R3 0 2 9 R3 0 2 6 R3 0 1 8 R3 0 1 9 C3 0 4 3 R3 0 3 5 RJ 6 Q3 0 0 1 R3 0 3 2 R3 0 2 8 R3 0 3 0 Q3 0 0 5 R3 0 2 7 Q3 0 0 2 R3 0 3 ...

Page 38: ...S2SD601AR 1 X 2SD601AR AA Q804 VS2SB709AR 1 X 2SB709AR AA Q805 VS2SD601AR 1 X 2SD601AR AA Q1001 VS2SD601AR 1 X 2SD601AR AA DIODES AND LED D201 RH EX0676GEZZ X Zener EX0676GE AB D203 RH DX0048GEZZ X DX0048GE AA D393 RH DX0247CEZZ X DX0247CE AB D501 RH EX1393CEZZ X Zener EX1393CE AB D502 RH EX0652GEZZ X Zener EX0652GE AB D503 RH EX0612GEZZ X Zener EX0612GE AB D504 RH EX0654CEZZ X Zener EX0654CE AC D...

Page 39: ...42 VCEA0A1EW476M X 47 25V Electrolytic AA C643 VCEA0A1CW477M X 470 16V Electrolytic AB C650 VCKYPA2HB101K X 100p 500V Ceramic AB å C701 RC FZ029SCEZZ X 0 22 275V AB Metallized Polypro Film C702 RC KZ0029CEZZ X 0 01 250V Ceramic AB C703 RC KZ0029CEZZ X 0 01 250V Ceramic AB C704 RC KZ0029CEZZ X 0 01 250V Ceramic AB å C705 RC EZ0804CEZZ X 220 400V Electrolytic AH C706 VCQYTA1HM103J X 0 01 50V Mylar A...

Page 40: ... VRD RA2BE272J X 2 7k 1 8W Carbon AA R314 VRS CY1JF332J X 3 3k 1 16W Metal Oxide AA R315 VRS CY1JF222J X 2 2k 1 16W Metal Oxide AA R362 VRS CY1JF332J X 3 3k 1 16W Metal Oxide AA R363 VRS CY1JF564J X 560k 1 16W Metal Oxide AA R364 VRS CY1JF332J X 3 3k 1 16W Metal Oxide AA R365 VRS CY1JF564J X 560k 1 16W Metal Oxide AA R381 VRS CY1JF564J X 560k 1 16W Metal Oxide AA R382 VRS CY1JF332J X 3 3k 1 16W Me...

Page 41: ...1 16W Metal Oxide AA R1047 VRS CY1JF183J X 18k 1 16W Metal Oxide AA R1048 VRS CY1JF101J X 100 1 16W Metal Oxide AA R1049 VRS CY1JF183J X 18k 1 16W Metal Oxide AA R1051 VRS CY1JF101J X 100 1 16W Metal Oxide AA R1052 VRS CY1JF104J X 100k 1 16W Metal Oxide AA R1053 VRS CY1JF101J X 100 1 16W Metal Oxide AA R1054 VRS CY1JF101J X 100 1 16W Metal Oxide AA R1059 VRS CY1JF103J X 10k 1 16W Metal Oxide AA R1...

Page 42: ...CC106K X 10 16V Electrolytic AB C3018 VCEA0A1HW105M X 1 50V Electrolytic AA C3019 VCEA0A1CW106M X 10 16V Electrolytic AA C3020 VCEA0A1CW106M X 10 16V Electrolytic AA C3021 VCEA0A1CW106M X 10 16V Electrolytic AA C3022 VCEA0A1CW106M X 10 16V Electrolytic AA C3023 VCKYCY1HF103Z X 0 01 50V Ceramic AA C3024 VCKYCY1HF103Z X 0 01 50V Ceramic AA C3025 VCKYCY1HF473Z X 0 047 50V Ceramic AA C3026 VCKYCY1HF47...

Page 43: ...rew x3 AA XTASD40P16000 X Screw x8 AA XTASD40P20000 X Screw x4 AA QCNW A871WJZZ X Connecting Cord AB QCNW A872WJZZ X Connecting Cord AC QCNW A873WJZZ X Connecting Cord AC QPLGA0017CEZZ X Plug AC SUPPLIED ACCESSORIES ACCESSORIES RRMCGA108WJSA X Infrared R C AT TiNS A372WJZZ X Operation Manual AE PACKING PARTS NOT REPLACEMENT ITEM SPAKCA318WJZZ Packing Case AS SPAKPA055WJZZ Wrapping Paper AE SPAKXA1...

Page 44: ...Ref No Part No Description Code Ref No Part No Description Code 48 21FL91 PACKING OF THE SET ...

Page 45: ...Ref No Part No Description Code Ref No Part No Description Code 49 21FL91 M E M O ...

Page 46: ... retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without prior written permission of the publisher SHARP CORPORATION AV Systems Group Quality Reliability Control Center Yaita Tochigi 329 2193 Japan TQ1456 S Dec 2002 Printed in Japan In Japan gedruckt MY DS Design and Production Information Design SEM Production SEMEX ...