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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: 25
SonyFE-1 KV21X5Uburst of EHT then shuts down with LED flashing error 2regulator IC603 SE135N (874992061)14-09-04
SonyFE-1 KV21X5Upic closing in from sides and going off (poor HT regulation)error amp IC603 SE135N (874992061)14-09-04

SonyFE-1 KV25K5UInt reverts to st/by with LED flashing 5 timesCRT internal s/c - replaced under guarantee - very prone to this fault apparently14-09-04
SonyFE-1 KV25K5Ulines across screen, frame IC running hotC506 0.01 uF14-09-04
SonyFE-1 KV25K5Unot starting up, LED flashes 4 timesT511 breaking down at switch on, replace T511 (145326411 for 25", 145326511 for 29")14-09-04
SonyFE-1 KV25X5Ucomes on then goes off, red LED is onstby IC609 TOP209P u/c14-09-04
SonyFE-1 KV25X5Uyellow line down screen about 2 inches from RHSIC301 CXA2060BS (875208838)14-09-04
SonyFE-1 KV29K5Udead, in stbyC515 220uF 25V s/c14-09-04
SonyFE-1 KV29K5Uno remote operationD907 BZX79C9V1 leaky on SIRCS line14-09-04
SonyFE-1 KV29K5Upink band on LHS, only obvious on dark bachgroundvideo lead from CN504 on A PCB to CN704 on CRT wrapped around L537 (LINE LIN), tie bottom edge of loom to the hole provided in top right corner of S PCB14-09-04
SonyFE-1 KV29X5Uno remote, front buttons are OkD908 9.1V zener leaky on H board14-09-04
SonyFE1Buzzing only on sound from tuner - ok on AVIncorrect sound system selected, the cause being memory corruption. To correct the problem, enter test mode to obtain "TT - -" on screen, & type in "24". This will reset sound system back to PAL I. Turn set off & re-tune, & sound should then return to normal.14-09-04
SonyFE1Dark picThe ABL circuit is operating incorrectly. Replace R516 (56K) & R517 (10K or 27K depending on CRT)14-09-04
SonyFE1Reverts to st/by at sw on with 2 or 4 flashes from LED2 flashes indicates an over-current error in line stage, & 4 indicates a frame fault. However, quite often, when 4 flashes occur it can still in fact be an over-current error as well as a frame fault. To prove which is the correct fault, measure pin 52 of the micro (IC001) at switch-on, and if this voltage goes high (anything above 0.6v) then it is in fact over-current. If it stays at 0v then the fault is more than likely within frame stage.14-09-04
SonyFE1Snowy pic & tone on soundIC001 micro faulty14-09-04
SonyFE1 KV21X5UDead with 2 flashes from ledWhen D512 was unsoldered, LOP stage operated - Q703 (BF420), Q704 (BF421) and Q713 (BF420) all in the red output. Plus D701 (MTZ J 5.6B, a 5.6V zener) leaky and D705, 1SS133T (1N4148) O/C. all on crt base14-09-04
SonyFE1 KV25K5UDead with LED flashing 4 timesCheck for 9v at pins 33 & 34 IC301. If present, check R546 47R 1/2w for o/c (135v Line dr supply)14-09-04
SonyFE1 KV25K5UNo R/C op - hset okD011 5v6 zener on o/p of Rx leaky14-09-04
SonyFE1 KV25K5UTrips off with a crack - LED flashes 5xCRT faulty14-09-04
SonyFE1 KV25KSUFRAME IC HOT LINES ON SCREENREPLACE C506 0.01MFD14-09-04
SonyFE1 KV25X5U etcEnters search mode as soon as its switched onreplace SS902 preset search switch and clean PCB that it is mounted in14-09-04
SonyFE1 KV29X5LStuck in standby with two blinks from front LED every few seconds.Replace L.O.P transistor 2SD2539. S/C due to poor soldering of scan caps on collector.14-09-04

SonyFE1 KV29X5UVol OSD perm displayed & front controls give wrong functsLeaky front control switches - can be cleaned with luck/care14-09-04
SonyFE1A KV25FX20DSt/by only - flashes twice (prot mode)IC606 STRF6654 low res of 140R between pins 4 & 5 (should be 3M)14-09-04
SonyKV21X5U FE1Dead - LED flashes twice - LOPTr s/cS2055N LOPTr replaced & solder up vatious dry joints - make sure you don't get a bad batch of S2055Ns!14-09-04
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