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Repair tips

Electronic appliance repair tips database - TV (LCD,TFT,Plasma,Digital), Monitor, VCR, DVD recorder and player, Digital camera, Audio equipment, Microwave ovens, Phone systems, Computer repair

MakeModelProblemSolutionDate
Found: 64
Sharp37AM23H 5BSAService mode adjustmentsHold vol up, vol down & chan up buttons whilst switching on14-09-04
Sharp37AM23H 5BSASnowy & buzzing - wont tune or prog properlyEEPROM IC1002 replacement reqd14-09-04

Sharp5BS-AField scan reduced with cramping top/bottomCheck- C712 220µ, C713 1000µ, Q502 BD825, Q504 BD828, Q509 BC635, Q510 BC338, D501 1N414814-09-04
Sharp5BS-Aint snowy - when tappedSF201 SAWF 14-09-04
Sharp5BSABlank raster with fb lines (sound ok)D1002 near r/c rx - 1N4148 ok14-09-04
Sharp5BSADead - LED pulses red5VB o/p low - Q708 BC338-40 & D715 5v1zener14-09-04
Sharp5BSADead - s/c across lop trLOPTx faulty - orig replacement also faulty14-09-04
Sharp5BSAField scan reducedC713 1000µ 16v faulty14-09-04
Sharp5BSAIncorrect line freqcheck supply to IC801 MC44007 - if low check caps in psu - C713 1000µ 16v, C712 220µ 16v, C714 470µ 10v, C716 100µ 16v, C719 470µ 35v & C604 / C622 220µ 10v in line dr14-09-04
Sharp5BSAInt dead then perm deaddry joints, R611 3k3 ?w was 2k5, no line drive - no 5v to IC801pin 35. Q708 BC338-40 reg o/c14-09-04
Sharp5BSANo sigs - searches but won't storeAFT switched off in service mode14-09-04
Sharp5BSANo sound/pic & all o/p volts a third downQ509/510 in fop s/c14-09-04
Sharp5BSANo TxtQ806 sm 2SC2412 - feeds CVBS sig to pin 30 micro IC100114-09-04
Sharp5BSAslightly off tunereprog afc - loc OD - set data to 9F - how to access prog mode??14-09-04
Sharp5BSATo enter service modePress chan up & down buttons together whilst sw on tv14-09-04
Sharp5BSAtuner drift - exasapated by pcb flexC1013 100n sm cap cracked & leaky14-09-04
Sharp5BSAVarious inc field cramp, r/c non funct & int lop tr failureC713 1000µ 16v in -10v line14-09-04
Sharp5BSA 37AM23No line drive - some soundQ 605 (s.m. pnp transistor) was O/C14-09-04
Sharp5BSA 51AT15Dead symptoms with psu runningNo line drive base Q603, no 5v supply pin 8 EEPROM IC1002 as 5v reg tr Q704 BC338-40 o/c emitter14-09-04
Sharp5BSA 51AT15Happears dead, LED is greenQ704 BC338 o/s14-09-04
Sharp5BSA 51AT15HCorrupted service mode settings after replacement of Q601/2No stopping when tuning, height and vert posn out - set AFC optione byte to '9F'14-09-04
Sharp5BSA 51AT15HDeadLOPTr, Q509, Q510 & C71314-09-04

Sharp5BSA 51AT15HDeadC713 1000µ 25v hi esr caused failure of Q509 BC635 & Q510 BC338 in field cct14-09-04
Sharp5BSA 51AT15HDeadC716 100µ hi esr14-09-04
Sharp5BSA 51AT15HdeadQ601 BU508DFI s/c (use correct type)14-09-04
Sharp5BSA 51AT15HdeadLOPTr reads s/c in situ, check R622 - one of its ends shorting to earth print14-09-04
Sharp5BSA 51AT15HDead - LOPTr BU508DF1 blownWhen Tr replaced , overheats due to leaky line dr Tr Q602 BC635 - fitted BC639 in lieu (checks ok out of cct)14-09-04
Sharp5BSA 51AT15HDead - no LEDcaps in psu sec plus BU508DF1 & 2SC335-19 dr tr - NOTE MUST use correct replacements or will not work properly IE brushing if dr tr incorrect14-09-04
Sharp5BSA 51AT15HDead - no start upC713 1000µ 25v hi esr & Q601 BU508DF1 LOP tr s/c14-09-04
Sharp5BSA 51AT15HDead BU508DF1 LOPTr s/cReplaced with BU2508DF - given as equiv but DOES NOT work! Use correct Tr & replace C713 1000µ hi esr14-09-04
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