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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: 1049
PanasonicTXW28R4St/by only LOPTr s/c (BU2508AXLB)Replaced by 2SD1577LB for greater reliability14-09-04
PanasonicTXW28R4Trips to st/by intC464 220nF had a 22nF cap fitted in error14-09-04

PanasonicTXW28R4DPSw off aft 15 secs - sound & pic okR558 120k by LOPTx fback from beam lim to prot cct14-09-04
PanasonicTXW28R4DP Euro4Blnk raster - no OSDMicroprocessor IC1101 part number SDA5450C48 (30 UKP +VAT).14-09-04
PanasonicTXW28R4DP Euro4No sigs - snow only on screenleaky SMD transistor marked "BR" inside IF section of the tuner. I used MSB1218ART114-09-04
PanasonicTXW28R4DP Euro4Sound dist from lh speakersound processor IC2102 MSP3410D part number MSP3410DPOB4 14-09-04
PanasonicU1DeadQ801 BU326 chopper tr faulty - checked ok on meter14-09-04
PanasonicU1Int field collapseDry joints Trs 454 & 45514-09-04
PanasonicU1No colour - intermittent.Intermittent customer colour control.14-09-04
PanasonicU1No raster - EHT ok.D818.14-09-04
PanasonicU1Sound - no sound or raster.R810.14-09-04
PanasonicU2Field collapseQ403 (Darlington tr) 2SD837 - BD645 works14-09-04
PanasonicU2Frame - top foldover if adj A1 control.Frame IC TDA1106.14-09-04
PanasonicU2Lines/interference on picC854 o/c14-09-04
PanasonicU2No brightness.BU208.14-09-04
PanasonicU2No picture - CRT cut off.2x zeners 6.2v in regulator base cct.14-09-04
PanasonicU2Sound - level affected by contrast control.C857 ( 47u f )14-09-04
PanasonicU2Sqealing/line tearing/corrugated vertsC809 1µ 250v14-09-04
PanasonicU2Standby - stuck in standby.PSU D852/3 , Q501 line drive transistor , LOPTX.14-09-04
PanasonicU2Standby - stuck in standby.D552 ( TVSC2715M ) o/c.14-09-04
PanasonicU2Stuck in standby.D852 or D853 ( BY298 ) leaky , BU208.14-09-04
PanasonicU2Width & Hight reduced.C371 ( 100uf 240v ) in middle of board.14-09-04

PanasonicU3Comes on in standby if on/off switch is used.Relay RY1001 carbonised contacts.14-09-04
PanasonicU3Field - 1/2 picQ402 2SD856 - used TIP41C14-09-04
PanasonicU3Field collapseReplaced field o/p trs but ran hot - D407 1N4148 o/c14-09-04
PanasonicU3Trips to st/by aft 1 secHT smoother C808 220µ 400v14-09-04
PanasonicU3Whistles/Screeches at sw on with black linesC809 1µ 350v, C853 100µ 250v14-09-04
PanasonicU3whistling & ringing vertsC853 100µ 250v14-09-04
PanasonicU3WChannels - difficulty selecting channels.IC TMS3452N2L.14-09-04
PanasonicU3WChannels - not storing channels.IC TMS3452N2L.14-09-04
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