Sharp 4M-IOM Service Manual Download Page 12 | Manualshive

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Sharp 4M-IOM Service Manual Download Page 12

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Summary of Contents for 4M-IOM

Page 1: ...to those specified should be used f CONTENTS Page l IMPORTANT SERVICE SAFETY PRECAUTION 2 l ELECTRICAL SPECIFICATIONS m 3 l LOCATION AND IDENTIFICATION OF CONTROLS 4 l DISASSEMBLY AND REASSEMBLY 5 l TROUBLE SHOOTING TABLE a 6 l ADJUSTMENT PROCEDURES 8 l CHASSIS LAYOUT 11 l SCHEMATIC DIAGRAM AND WAVEFORMS 13 l PRINTED WIRING BOARD ASSEMBLIES 19 BLOCK DIAGRAM 25 0 REPLACEMENTPARfSCI S 27 PACKING OF ...

Page 2: ...net parts and a known earth ground such as electrical conduit or electrical ground connected to an earth ground Use an AC voltmeter having with 5000 ohm per volt or higher sensitivity to measure the AC voltage drop across the resistor Connect the resistor connection to all exposed metal parts having a return path to the chassis antenna metal cabinet screw heads knobs and control shafts escutcheon ...

Page 3: ...istor active matrix system 37 440 117 x 320 VHF 48 25 294 25MHz UHF 471 25 855 25MHz 200 mW 2 8cm round type x 1 Fluorescent light tube built in cold cathord type External power supply DC 12V External antenna jack Earphone jack A V Input jack Driver output jack AC 110 240V 50 60Hz AC adaptor supplied When using AC adaptor Approx 11 W AC 15 9x11 1 x 5 5cm Approx 570g not including Set Stand AC Adap...

Page 4: ...deo input indicator Tint control Colour control Colour Sound AUTO indicator Mounting socket Channel VIA buttons Channel Number Recall button Power switch Mode switch Set Memory button System switch 12V DC power socket Volume V A buttons Brightness V A buttons System change button Rod antenna Set stand I LCD screen panel 4 ...

Page 5: ...SEMBLY AND REASSEMBLY Remove the 7 rear cover fastening screws Remove the light guide fastening screws Undo the 3 light guide hooks Remove the 4 LCD holder fastening screws Remove the 4 Tuner PWB fastening screws 5 ...

Page 6: ...dary outputs 5V 8V 13V 21V and 33V of T701 all normal I No h No Check L703 and L704 primary oscillation circuit of T701 QI Push the CH UPlDN buttons in search mode Does the BT voltage at pin 4 of tuner change Does the voltage go up as the channel 1 numbers go up I Check the AGC IC201 and their Continued to the following pages I Yes Are the voltages of Q861 Q862 and 4863 normal I I No Yes 1 Are the...

Page 7: ...TROUBLE SHOOTING TABLE Continued TROUBLE SHOOTING TABLE Continued Prior checks NO SOUND IS HEARD ...

Page 8: ...ition l AFT ADJUSTMENT L210 A i 9flmm 20 20 1 Feed IF sweep signal to TPl 01 2 Add fixed bias to TP202 3 Connect the oscilloscope to TP204 1 Adjust L210 so that the 38 9MHr marker be positioned as shown below 00 l SIGN ADJUSTMENT VR501 RF AGC ADJUSTMENT VR201 1 Set the MODE switch 5401 to SEARCH HI position 2 Connect a diode and lk ohm resistor between pins 16 and 33 of IC401 Set the unit to MANUA...

Page 9: ...cedures I SECAM KILLER ADJUSTMENT L811 1 Feed SECAM colour bar signal 1 Adjust LB1 1 so that the DC level at pin 19 be 2 Connect the oscilloscope to TP805 pin 29 of maximum ICBOl c l SECAM DEMODULATION ADJUSTMENT L812 L813 I Feed SECAM colour bar signal through the AV jack I Connect the oscilloscope to TP801 and TP803 2 Channels L Cut off the Y component of the colour bar signal 1 Turn up the colo...

Page 10: ...CH 2 cable of the oscilloscope to TP808 Oscilloscope in ADD mode 5 Invert the waveform of channel 2 and add the signal of channel l to the channel 2 B WHITE BALANCE ADJUSTMENT VR807 VR806 1 Feed monoscope pattern signal through the AV jack 2 Set the brightness control to middle position 3 Connect the oscilloscope to TP807 G out Cl t l 4 Connect the CH 2 cable of the oscilloscope to TP806 Oscillosc...

Page 11: ...813 S E W CN40 1 oi DECCOER ioi zEi R LED A V l LB07 lti EL n EELA JZO I TBOl AV INPUT JACK B E LTER u CN701 FL H SPOl CtikCOE 0 SELECT SW 0 0 0 F702 O SA 5402 LEhCRYW VR701 DC 5V ADJ F701 t 2 SW41 1 SYSTEM J202 DIVERSITY JACK SECAM KILLEQ CN 8 0 3 J30 I LCD M ODULE EARPHONE JACK ia L 1 CN703 BATTAQY 134 TUNER PWB SELECT SW 1 J701 PCmER PLY JACK 0 TU 1 0 1 T U N E R EC Pa 2773 x201 S A W F I L T E...

Page 12: ...10M AIN PWB 0 VR601 S J POSITION l Wiring Side 0 7 0 BB 0 LED PWB 0408 L E D A V O GREEN 0 4 0 7 L E D A U T O I 0 0 7 I 8 I 9 I 10 I 11 I 12 I 12 ...

Page 13: ...Waveforms were observed with colour bar signal input from servicing colour bar signal generator and adiustment controls at their best positions 0 2 7 5Vp p O Sms div 0 3 300mVp p 2OysIdiv 20mVp p 20ps div Audio Chroma 0 4 Blue 0 5 ZOmVp p 20ps div Green 9 9Vp p 20ps div R Out SVp p 20vs div COM LC12 10 SVp p 20vs div 11 SVp p 2O div H Sync LCl FRP LC2 12 SVp p 2O div CSY LC3 0 14 36Vp p 1 Ops div ...

Page 14: ...4M 1 OM SCHEMATIC DIAGRAM AC ADAPTOR A AND SHADED COMPONENTS SAFETY RELATED PARTS 1 I 2 I 3 I 4 5 I 6 I 14 ...

Page 15: ...4M 1 OM 4M IO SCHEMATIC DIAGRAM MAIN III I I I I 1 1 I 2 I 3 I 4 I 5 I 6 I 7 15 ...

Page 16: ...4M IOM 1 JI 1OM ClZl z I 1 I I I I I I I I I I I I I t I I I 6 I 7 I 8 I 9 I 10 I 11 I 12 16 ...

Page 17: ...ER 3 Cl06 All3 RI14 RI I5 Cl05 47 I20 120 I20 Ol t I6Vl ll lOWl ll lOWl ll lOWl Cl12 66P EF loo ICI6 P f LlO3 22uI m 7 lOl EC F 2773 m OIOZ A 15661 0502 DTC144EU RIO9 6 6N I1 i I 0103 2SA1566Y I lC502 TC74HCOOAF CF304 YSL6 5h4C6 I ...

Page 18: ...3 TC7SOBF AFT BAND TUNING R323 620 It324 62C 1 b I 22u I 22K I L l ic333 D 194ElJ T OOP r I47K m 47K L CKZO I 52043 2020 0307 DTA I24EU aT c319 56oop R223 Z ZK L207 15Iu 3 I f56OWX PI226 R229 IOK l6K m I 0212 25041 l6Y I 7 I 8 I 9 I 10 I 11 I 12 I 18 ...

Page 19: ...4M 1 OM 4M i PRINTED WIRING BOARD ASSEMBLIES l MAIN PWB Component Side ...

Page 20: ...l LED PWB Component Side I 8 I 9 I 10 I 11 I 12 20 ...

Page 21: ...4M 1 OM l MAIN PWB Wiring Side 1 I 2 I 3 I 4 I 5 I 6 21 ...

Page 22: ...4M 1 OM l LED PWB Wiring Side 7 I 8 I 9 I 10 I 11 I 12 I 22 ...

Page 23: ...1 4M IOM 4h PRINTED WIRING BOARD ASSEMBLIES Continued l TUNER PWB Component Side 1 I 2 I 3 I 4 I 5 I 6 I 23 ...

Page 24: ...I 0 TUNER PWB Wiring Side 7 I 8 I 9 I 10 I 11 I 12 I 24 ...

Page 25: ...L41 BLOCK DIAGRAM i l d b 1 a b i 1 umo ICSO I va ComRoL I mm 11 ICSOZ AUDIO up l E aa01 DELI 1 I J I 1 I 2 I 3 I 4 1 5 I 25 ...

Page 26: ...I KEY MATRIX 3V i IN 3 I I I i Y A 12 ii i i i 0 0 7 s 5 4 i 3 2 o lOl UAIW PWB VI I L T O ki LE I 7 I 8 I 9 I 10 I 11 I 12 1 26 ...

Page 27: ...5 4 4756 4 7 5 7 4758 4759 4760 Q761 Q763 4764 4765 QSOl Q802 Q803 Q804 4805 Q806 4807 Q861 4862 Q863 TRANSISTORS 9AP8H29802T3 J DTA144EU 9AP8H29723Tl J FMA2 T149 9AP8H29802T3 J DTA144EU 9AP8H29722Tl J DTC144EU 9AP8H29802T3 J DTA144EU 9APCK441 16ZY J 2SC4116Y 9APAK41586ZY J 2SA1586Y 9APCK44116ZY J 2SC4116Y 9APCK42712ZY J 2SC2712Y 9APCK441 16ZY J 2SC4116Y 9APDK40874AZ J 2SD874A 9APCK43518ZK J 2SC35...

Page 28: ...APKP03101 JC J 1OOpF 50V C e r a m i c AB C406 9APKP03101 JC J 1OOpF 50V C e r a m i c AB C408 9APKP0318OJC J 18pF 50V C e r a m i c AB C409 9APKP03270JC J 27pF 50V C e r a m i c AB C410 9APKQ841ROMT J 1pF 50V Electrolytic AE c411 9APEP04104ZF J 0 1 F 25V C e r a m i c AB C412 9APGP04103KB J 0 01 F 25V C e r a m i c AB C413 9APKQ84RlOMT J 0 1 F 50V E l e c t r o l y t i c AE C414 9APKP03221JC J 22...

Page 29: ...APEQ41331 M3 J 330 F 16V E l e c t r o l y t i c AF 9APEQ851 OOMT J 10 F 16V Electrolytic AG N P C823 C824 C825 C826 C827 C828 C829 C830 C831 C832 C833 C834 C835 C836 C837 C839 C840 C841 C842 C844 C845 C846 C847 C848 C849 C850 C851 C852 C853 C854 C855 C856 C857 C858 C859 C860 C861 C862 C863 C864 C865 C866 C867 C868 C869 C870 C871 C872 C873 C874 C875 C876 C879 C880 C881 C882 C883 C884 C885 C886 C88...

Page 30: ...B AB AB AB AB AB AB AB AB AB AB AB AB Jl I I I I I RESISTORS Continued R468 9APUL49473JA J 47k 1 16W C h i p AB R469 9APUL49183JA J 18k 1 16W C h i p AB R470 9APUL49223JA J 22k 1 16W C h i p AB R473 9APUL49101JA J 1 0 0 1 16W C h i p AB R474 9APUL49103JA J 10k 1 16W C h i p AB R475 9APUL49272JA J 2 7k 1 16W C h i p AB R476 9APUL49204JA J 200k 1 16W C h i p AB R477 9APUL49274JA J 270k 1 16W C h i p...

Page 31: ... A8 AB AB AB AB AB AB AB AB AB AB AB AB AB AB AB AB AB AB AB A8 AB AB AB AB AB AB AB AB AB AB AB AB AB AB AB AB AB AB AB A8 AB AB AB A8 AB AB AB AB AB AB AB R875 R876 R877 R878 R879 R881 R882 R883 R884 R885 R886 R887 R891 R892 R893 R894 R895 R896 R897 R898 R899 R911 R913 R914 R915 R916 R917 R918 F701 AF702 J401 J601 J602 J603 J604 J701 s401 S402 s403 5404 s405 S406 s407 S408 s409 s410 s411 s701 CN...

Page 32: ...9AP8H25702Al J lSS313 0 2 0 3 9AP8H25708Cl J MC2848 D204 9AP8H25708Cl J MC2848 D301 9AP8H25708Cl J MC2848 D501 9AP8H25708Cl J MC2848 D503 9AP8H25708Cl J MC2848 AC A D A D AC AC AC AC AC PACKAGED CIRCUITS x201 9AP8F36723Al J Crystal SAWFilter X301 9APOJ38595AF J C r y s t a l X302 9APON38489Al J C r y s t a l A T A D A C COILS AND TRANSFORMERS CF201 9AP8F3671 1Al J CeramicFilter CF202 9APOJ36596Al ...

Page 33: ...KB J 22OOpF 50V C e r a m i c A8 C211 9APGP04103KB J O OlpF 25V C e r a m i c AB C212 9APGP04103KB J O OlpF 25V C e r a m i c AB C213 9APAQ50470MS J 47 1F 6 3V Electrolytic AE C214 9APGP07474Ml J 0 47pF 25V T a n t a l u m A D C215 9APGP07474Ml J 0 47pF 25V T a n t a l u m A D C216 9APGP04103KB J O OlpF 25V C e r a m i c AB C217 9APKP03680JP J 68pF 50V C e r a m i c AB C218 9APKP03180JP J 18pF 50V...

Page 34: ... l l 6W Chip 1 8 0 lll6W C h i p 18k ll16W C h i p 22k ll16W C h i p 4 7 0 ll16W C h i p 1 8k ll16W C h i p lk l l 6W Chip 8 2 0 lll6W C h i p 8 2 0 ll16W C h i p 4 7 0 ll16W C h i p lk l l 6W Chip 1 0 0 ll16W C h i p 4 7k ll16W C h i p 4 7k ll16W C h i p 1 5k l l 6W Chip 4 7k ll16W C h i p lk l l 6W Chip 4 7 0 ll16W C h i p 47 l l 6W Chip 47k ll16W C h i p 47k ll16W C h i p 390k ll16W Chip 390k l...

Page 35: ...4M 1 OM H G F E D C B CABINET AND MECHANICAL PARTS 1 I 2 I 3 I 4 I 5 6 1 35 ...

Page 36: ...tenna Bracket J Insulator Sheet J Insulator Sheet J Insulator Sheet J Insulator Sheet J Charge Lug J Contact Spring J Charge Lug J Wire J Flexible Connector J Cushion J S c r e w J S c r e w J Light Guide J Shade Panel J Fluorescent Lamp J T r i g g e r J Shield Panel J Side Cabinet J Protect Panel J Cushion J LCD Unit J S p e a k e r J LCD Bracket J LCD Earth Panel J LCD Earth Panel J B r a c k e...

Page 37: ...I 4M 1 OM PACKING OF THE SET Polystyrene Cover Earphone Antenna Adantnr Adaptor Socket Pluq Buffer Material 37 ...

Page 38: ...4M 1 OM S H A R P T882 1 S Printed in Japan YO KD ...

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