Sharp 20F540 XFlat Page 23 Service Manual Download | Manualshive

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SCHEMATIC DIAGRAM: CRT Unit

20F540

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Summary of Contents for 20F540 XFlat

Page 1: ...DIAGRAM 17 WAVEFORMS 18 SCHEMATIC DIAGRAMS 19 PRINTED WIRING BOARD ASSEMBLIES 24 REPLACEMENT PARTS LIST 27 PACKING OF THE SET 34 CONTENTS SPEAKER SIZE 5 x 12 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 120 V 60 Hz POWER RATI...

Page 2: ...to be certain that the high voltage does 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 re...

Page 3: ...ks mechanical insulators etc 3 To be sure that no shock hazard exists check for leakage current in the following manner Plug the AC cord directly into a 120 volt AC outlet Do not use an isolation transformer for this test Using two clip leads connect a 1 5k ohm 10 watt resistor paralleled by a 0 15µF capacitor in series with all exposed metal cabinet parts and a known earth ground such as electric...

Page 4: ...turns to previous channel PERSONAL PREFERENCE With the Personal Preference buttons you can prog ram your favorite programs by using the 4 categories A B C and D The channels can be accessed quic kly by using these buttons VOLUME UP DOWN Increases sound Decreases sound In menu mode changes or selects the TV adjustments MENU Press Accesses MAIN MENU Press again Exits MAIN MENU CATV DVD TV VCR MODE S...

Page 5: ... 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 anode o...

Page 6: ... as follows 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...

Page 7: ...27 64 V18 CC POS Micron 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 V21 H VCO 1 Chip H VCO 0 7 4 M01 MTS ATT MTS ATT 0 15 10 M02 MTS VCO MTS VCO 0 63 32 M03 MTS FILTER MTS FILTER 0 63 28 M04 MTS WIDEBAND MTS WIDEBAND 0 63 27 M05 MTS SPECTRAL MTS SPECTRAL 0 63 32 M06 SUB VOL MTS VOL 0 63 63 ADJUSTMENT METHOD Caution to get into the service mode one of...

Page 8: ...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 set to ...

Page 9: ...RI 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 SLICE DOWN 0...

Page 10: ...V 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 1 O19 SETUP FLAG NO SETUP AUTO SETUP 1 O20 FR AV Front 3 Rear AV 3 Display FRONT A V INPUTS and REAR A V INPUTS in DEMO mode 2...

Page 11: ...11 MODEL 20F540 CHASSIS LAYOUT 20F540 ...

Page 12: ...12 MODEL 20F540 BLOCK DIAGRAM CRT Unit 20F540 ...

Page 13: ...13 MODEL 20F540 BLOCK DIAGRAM MAIN Unit 20F540 ...

Page 14: ...20F540 14 ...

Page 15: ...15 MODEL 20F540 BLOCK DIAGRAM MTS MODULE Unit 20F540 ...

Page 16: ...20F540 16 ...

Page 17: ...tages 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 chassis...

Page 18: ...Vp p Vert Rate 7 6 56 Vp p Horiz Rate 8 6 40 Vp p Horiz Rate 9 4 88 Vp p Horiz Rate 0 158 Vp p Horiz Rate q 1140 Vp p Horiz Rate w 48 Vp p Vert Rate e 3 8 Vp p Vert Rate r 118 Vp p Horiz Rate t 440 Vp p Horiz Rate y 5 04 Vp p Horiz Rate u 5 12 Vp p Vert Rate i 112 8 Vp p Horiz Rate o 94 4 Vp p Horiz Rate p 109 6 Vp p Horiz Rate 20F540 ...

Page 19: ...19 8 7 10 9 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM MAIN 1 Unit 20F540 ...

Page 20: ...17 17 19 18 15 14 13 12 11 10 16 20F540 ...

Page 21: ...21 8 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM MTS MODULE 10 9 7 6 20F540 ...

Page 22: ...22 19 18 17 16 15 14 13 12 11 10 20F540 ...

Page 23: ...23 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM CRT Unit 20F540 ...

Page 24: ...24 6 5 4 3 2 1 A B C D E F G H PRINTED WIRING BOARD ASSEMBLIES PWB A MAIN Unit Wiring Side 20F540 ...

Page 25: ...1 0 1 1 C1 0 0 8 RJ 1 7 R1 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 R...

Page 26: ...1 7 R3 0 1 4 I C3 0 0 1 R3 0 2 5 R3 0 1 3 RJ 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...

Page 27: ...IC703 VHISE130N F X SE130N AD IC801 VHIM61251AF1EQ X M61251AFP AN IC1001 RH IXA155WJN4 X IXA155WJ AP IC1003 VHIBR24L16F 1Y X BR24L16F AC Q201 VS2SC2735 1EY X 2SC2735 AB Q302 VS2SD601AR 1Y X 2SD601AR AB Q601 VS2SC2482 1 X 2SC2482 AB Q602 VS2SD2539 1E X 2SD2539 AG Q603 VS2SC3198 G 1 X 2SC3198 G AB Q604 VS2SD601AR 1Y X 2SD601AR AB U Q701 VSSTP6NC80Z1E X STP6NC80Z AF Q703 VS2SC3198 Y 1 X 2SC3198 Y AB ...

Page 28: ... EL AB C4XX VCKYPA1HF103Z X 0 01 50V Ceramic AA C505 VCEA0A1HW107M X 100 50V EL AB C508 VCFYAA2AA224J X 0 22 100V M Poly AB C509 VCKYD41CY103NY X 0 01 16V Ceramic AB C511 VCEA0A1VW477M X 470 35V EL AB C512 VCKYPA2HB102K X 1000p 500V Ceramic AB C513 RC EZA332WJZZ X 1000 35V EL AB C514 VCFYSA1JB273J X 0 027 63V M Poly AB C515 VCEACA1HC335J X 3 3 50V EL AB C518 VCKYCY1HF103ZY X 0 01 50V Ceramic AA C5...

Page 29: ...Y1JF000JY X 00 1 16W M Ox AA RJ47 VRS CY1JF000JY X 00 1 16W M Ox AA RJ50 VRS CY1JF000JY X 00 1 16W M Ox AA RJ51 VRS CY1JF000JY X 00 1 16W M Ox AA RJ52 VRS CY1JF000JY X 00 1 16W M Ox AA RJ53 VRS CY1JF000JY X 00 1 16W M Ox AA RJ60 VRS CY1JF000JY X 00 1 16W M Ox AA RJ62 VRS CY1JF000JY X 00 1 16W M Ox AA RJ63 VRS CY1JF000JY X 00 1 16W M Ox AA RJ65 VRS CY1JF000JY X 00 1 16W M Ox AA RJ69 VRS CY1JF000JY ...

Page 30: ...7 VRS CY1JF473JY X 47k 1 16W M Ox AA R818 VRS RG3AB151J X 150 1W M Ox AB R823 VRD RA2BE101JY X 100 1 8W Carbon AA R824 VRD RA2BE101JY X 100 1 8W Carbon AA R826 VRD RA2BE101JY X 100 1 8W Carbon AA R827 VRS CY1JF102JY X 1k 1 16W M Ox AA R828 VRS CY1JF471JY X 470 1 16W M Ox AA R829 VRS CY1JF472JY X 4 7k 1 16W M Ox AA R830 VRS CY1JF393JY X 39k 1 16W M Ox AA R831 VRS CY1JF271JY X 270 1 16W M Ox AA R832...

Page 31: ...e M Film Metal Film SWITCHES FERRITE BEAD MISCELLANEOUS PARTS Ref No Part No Description Code Q854 VS2SC3789 2E X 2SC3789 AB Q855 VS2SC3789 2E X 2SC3789 AB Q894 VS2SA1015Y 1E X 2SA1015Y AB L851 VP MK820K0000 X Peaking 82mH AB C851 VCKYPA1HB221K X 220p 50V Ceramic AA C852 VCKYPA1HB221K X 220p 50V Ceramic AA C853 VCKYPA1HB221K X 220p 50V Ceramic AA C880 RC KZ0153CEZZ X 1000p 3kV Ceramic AB C893 VCEA...

Page 32: ...16W M Ox AA R3013 VRS CY1JF102JY X 1k 1 16W M Ox AA R3014 VRS CY1JF102JY X 1k 1 16W M Ox AA R3016 VRS CY1JF102JY X 1k 1 16W M Ox AA R3018 VRS CY1JF102JY X 1k 1 16W M Ox AA R3019 VRS CY1JF102JY X 1k 1 16W M Ox AA R3021 VRS CY1JF102JY X 1k 1 16W M Ox AA R3024 VRS CY1JF000JY X 00 1 16W M Ox AA R3025 VRS CY1JF272JY X 2 7k 1 16W M Ox AA R3026 VRS CY1JF331JY X 330 1 16W M Ox AA R3027 VRS CY1JF392JY X 3 ...

Page 33: ...FOAM AK SSAKA0101GJZZ X PLASTIC BAG AB PACKING PARTS NOT REPLACEMENT ITEM Ref No Part No Description Code 1 CCABAA323WEH9 X Front Cabinet Ass y 1 1 Front Cabinet 1 2 HBDGB3155CESA X SHARP Badge AD 1 3 HDECQA119WJSA X LED RC Cover AC 1 4 JBTN A070WJKC X Power Button 1 5 MSPRC0005PEFW X Power Button Spring AA 1 6 GDORFA015WJKC X door 1 7 MSPRPA012WJFW X Door Spring AB 1 8 HINDPA194WJSA X Indication ...

Page 34: ...34 PACKING OF THE SET 20F540 ...

Page 35: ...20F540 35 ...

Page 36: ...ans electronic mechanical photocopying recording or otherwise without prior written permission of the publisher QRC0014 U March 2004 Modify SEMEX J B Design and Production Information Design SEM Production SEMEX 20F540 SHARP ELECTRONICA MEXICO S A DE C V Quality Reliability Control Center Blvd SHARP No 3510 Parque Industrial Rosarito Playas de Rosarito México B C 22710 ...

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