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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: 626
Bush2850NTX Schneider TV4Bent verticals and pulsating width (Scene Dependent)Replace CC808 4N7 SMD primary side of PSU you will probably find that the pcb in this area has taken some heat.14-09-04
Bush2850NTX TV4Line collapseCan be dry joints scan coil plug but C419 330nF 400v scan coupling cap burnt & o/c in this case14-09-04

Bush2850NTX TV8Dead apart from led flicker at sw onC203 47µ 250v - checked ok out of cct14-09-04
Bush2850NTX-ADead aft brief micro activityMicro reqs sync pulse at pin 26 within 1 sec from line to function. This was missing due to T301 BC547B in line stage leaky14-09-04
Bush2850NTX-ALine & field collapse (single dot)Burnt line scan coils plug & TDA8170 fop chip, D402 BA157, fus res R408 o/c14-09-04
Bush2850NTX-MSslow start up - reset problemIC101 pin 33 needs 4.8v to start up mod - add 1µ & 100k res to 5v line14-09-04
Bush2850NTX/ADead - no line scanScan pug/skt melted, after repair still faulty due to C307 330nF scan coupling cap o/c & check dry joints14-09-04
Bush2850NTX/MSno graphics, front panel buttons are inoperative, remote is inoperative,no sound, no picture - only blank full size raster with 4-5 coloured horizontal lines on the screen.no flyback supply voltage to frame IC TDA8351 pin 6 caused by R438 0.22 Ohm o/c (near LOPT).14-09-04
Bush2850NTXADead with squegging noise from speakerCry joints C307 in line stage & field coll then visible, TDA8170 & R408 0R2214-09-04
Bush2850NTXAE-W faultyT302 (BC547) S/C and T303 (BC557) leaky.14-09-04
Bush2850NTXAField collapseTDA8170 & R408 0R2214-09-04
Bush2857offC914 4n7 across HT rect leaky14-09-04
Bush2857Poor V & H syncC127 in screened can housing IC102 TDA380514-09-04
Bush2857NTXBlank rasterNo 12v supply to tuner - R327 2R2 o/c14-09-04
Bush2857NTXBlank raster - sound okR436 6R8 hi res14-09-04
Bush2857NTXBlank raster - sound ok12v to IC397 & 304 low - R435 0R68 1w o/c14-09-04
Bush2857NTXBlank screen & no controls5v supply drops to 3.4v out of st/by - IC103 faulty14-09-04
Bush2857NTXC926 blown/smoking - HT unstableC908 & C91014-09-04
Bush2857NTXDeado/c 0.68 ohm 1 Watt resistor on the secondary of the chopper transformer.14-09-04
Bush2857NTXDead - off with bang/smokeC925 1000µ 25v, C926 22µ 160v, R916 0R68 1w safety res, C910 47µ 25v & other unreliable caps as in Onwa14-09-04
Bush2857NTXDead apart from Screaming PSU145v HT safety res smoking & hi res; 16v rail safety res o/c (Both inc yellow sleeving) - main cause C926 22µ 160v s/c - usual cause of 16v rail demise = Onwa psu caps14-09-04
Bush2857NTXField bounce - esp when coldC127 3µ3 off pin 10 IC10214-09-04

Bush2857NTXFlat looking picR433 150k in beam lim14-09-04
Bush2857NTXFrame bounceAdj AGC14-09-04
Bush2857NTXHT high and uncontrollablechopper base control tr leaky14-09-04
Bush2857NTXLeft hand side darker than rightC424 10µ 160v in RGB o/p supply14-09-04
Bush2857NTXLow contrast & colR433 150k near LOPTx o/c14-09-04
Bush2857NTXNicam poppingX001 13.104Mhz Xtal faulty14-09-04
Bush2857NTXNo pic - just grey raster, sound & OSG OKR435 0R68 12v reg feed res gone hi res14-09-04
Bush2857NTXNo soundIC101 TDA3857 sound IF14-09-04
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