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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: 92
B & O5102 77XXIntermittent negative picture.Dry joints on i.f. board connector , in vision detect can.14-09-04
B & O5102 77XXNegative picture - intermittently.Drys on IF edge connector , & earthg lugs in vision can.14-09-04

B & O7700No colour - ok on TxtNo 11.8v - 3C1 22µ 25v s/c14-09-04
B & O7702 7XXXXDead with no standby LED - intermittent.Drys on or T2 standby transformer.14-09-04
B & O7730Int colourResolder joints to edge conn on IF panel14-09-04
B & O7730No sync & weak videoTr1 BC547C on AV/Scart pcb leaky14-09-04
B&O7430/7702int picTR2 BC338 on left of pcb int o/c b-e14-09-04
Bush2877NTXDead with chopper tr s/cReplace chopper Q802 MTP6N60E pt no 30001386 & D824 s/c pt no 3000131914-09-04
Bush2877NTXRemote cont int or not workingDry joints PL502 ribbon cable on main pcb from front control pcb14-09-04
DaewooCP775Dead - lop tr Q401 2SD1880 s/cC416 blue disc cap 680pf 2kv s/c. D503 1N4148 s/c; RC527 10R chip res; R503 10k; R409 4k7 were cause of problem14-09-04
DaewooCP775Dead with psu runningNo or low line drive at base Q402 line dr - check Trs Q405 2SA854 & Q406 2SC945 for leak14-09-04
DaewooCP775NICAM craclesreplaced SAWF for analogue type to prevent operation - bodge!14-09-04
DaewooCP775No signals - fault in tuner. replace 4-legged device ( dual gate FET SMD transistor marked MOs ) inside the tuner near aerial input. I used generic BF998 marked Mop14-09-04
DaewooCP775Pic slow to come on - sound okReplace TDA8375A jungle chip14-09-04
DaewooCP775Service remote substituteCan use universal from TopTel4 or Gumbody 4 code = 244 for serv rem R30SVC14-09-04
DaewooCP775Txt lines on bottom 1/3 pic with Sat & VCRTDA8351 FOP chip14-09-04
DaewooCP775Various faults on chan change; eg E-W, blank raster, snow or st/bydata line down to 4V (must be 5V) - D708 5.6V zener is leaky Also replace D709 5.6V zener to be on the safe side.14-09-04
DansaiCTV1477Dead - faint whistling from PSU.C617 small blue disc type.14-09-04
DansaiCTV1477Dead apart from whistling from psuC617 blue disc cap pinhole in it14-09-04
DansaiCTV1477No Sound.Speaker O/C.14-09-04
Goodmans285NS CP775Blank raster - sound okC416 680pF, R409 , R503 & D506 - also check D505 1N414814-09-04
Goodmans285NS CP775Buzz at low sound levelsPoor earth conns on FOP chip heatsink14-09-04

Goodmans285NS CP775Cabinet vibration at certain freqsSpeaker grilles loose - not obvious - refix14-09-04
Goodmans285NS CP775Col bars on screen - no chroma pllRC515 100k sm14-09-04
Goodmans285NS CP775Col fault - no B-Y - ok in Txt & monoCC516 sm to pin 14 IC503 not soldered properly14-09-04
Goodmans285NS CP775Dead - no 20v to line dr trC401 10µ 63v14-09-04
Goodmans285NS CP775Dead - STRR5707 reg chip blownReplace reg chip, F801 4A, R804 0R33 2w, R807 7k5 & R806 100R - caused by C807 1nF 2kv blue cap that had split & leaky - & check print condition14-09-04
Goodmans285NS CP775Dead with mains fuse FS8014A A/S blownD803/804 & C80314-09-04
Goodmans285NS CP775E/W dist with lack of heightQ403 2SB546K & Q404 C3198Y14-09-04
Goodmans285NS CP775E/W faultyR406 4R7, D403 BY228 & Q404 KTC3198Y14-09-04
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