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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: 917
SonyBE3B KV24WSIULED flashes 6 times at sw on - no actioncould be memory problem (IC701) or dry joints tuner/multiway block connecting tuner pcb14-09-04
SonyBE3B KV25T1UNo pic, sound & EHT OKR824 1k8 burnt & C815 dry joints14-09-04
SonyBE3B KV28FS0UE/W dist & int widthDry joints connector CN800 for int width - R835 27R 3w o/c for no E/W14-09-04
SonyBE3B KV28FX20UDeadTNY253P IC5605 P/N 875958419 osc/chopper IC, TLP721 IC5606 P/N 874901321 4 pin opto, 10uf 450V C5658, 0.47ohm fusible R560214-09-04
SonyBE3B KVX2182Tries to start with burst of EHT then reverts to st/by with LED perm litInsul washer on FOP chip (shorting -15v line to chassis)14-09-04
SonyBE3B KVX2582Reverts to st/by at sw onC604/605/607 in psu14-09-04
SonyBE3B KVX2982UDead with components exploded in psuIC600 STRS6708, IC601 TLP721, R601 1k burnt, Q601 2SC3852A s/c, D603 6.8V zener o/c, R644 100R o/c, IC602 SE135N s/c pins 2-3.14-09-04
SonyBE3B KVX2982UNo sound or pic - if A1 advanced OSD shows with e-w errorsThe +12V supply down to +2V. IC605 12V regulator u/s.14-09-04
SonyBE3B KVX2982USt/by only aft initial burst of EHT - disabling trip makes no differenceEEPROM IC002 & FOP chip TDA8179 (To disable prot dis D505)14-09-04
SonyBE3DBrief rustle of EHT at sw on, psu ok but no line dr or error codeSet in over current mode - check volts at coll Q606, normally 0v - if volts present set is in overcurrent mode indicating fault in LOP14-09-04

SonyBE3DBuzzing only on sound - incorrect sound system selectedaudio system can be changed by altering "destination" of set. PAL I can be selected by putting set into service mode as described in the service manual. At "TT" prompt enter "24". After re-tuning set, sound should return to normal.14-09-04
SonyBE3DDead , burst of EHT at sw on, no st/byLOPTx HR733714-09-04
SonyBE3DE-W bowingQ532 fet replaced - was dry joints & check for other dry joints14-09-04
SonyBE3DE-W bowing & excess widthR870 1R 1W14-09-04
SonyBE3DFailure of EEPROMusually caused by flashover in unreliable CRT14-09-04
SonyBE3DNo OSD or TxtReplace D 817 (5.1 v z diode) on main pcb. H .Flyback line to board "A".14-09-04
SonyBE3DNo pic, sound, LEDsHT at D609 only 24v (135v), IC604 L4941BV 5v st/by reg u/s14-09-04
SonyBE3DPic cycles on/off every 10 secsD618 1SS133T in prot line cct (checked ok out of cct)14-09-04
SonyBE3DPoor contrast, dim display & dark picCheck R826, R827, R828 and R829 in ABL cct14-09-04
SonyBE3DRelay clicks on/off in st/by - ok when onIf 5V supply to micro (IC001) is lost when st/by selected then micro will reset & set will switch on again. Check Q601, D603, Q604, Q603, Q602, & confirm HT is 135v when set on. If HT is too high, replace IC602 & IC601.14-09-04
SonyBE3DReverts to st/by at sw on with 2 flashes from LEDIndicates over current or field fault. To eliminate field, dis D505 on main board. If set now sw on check IC500, R510, R509 etc If the problem is not in FOP, check volts on coll Q606. During normal operation this should be 0V. An over-current condition will cause this tr to turn on making its coll high. If so check comps in LOP. If neither of the above conditions is occurring, replace memory chip IC2 on A board.14-09-04
SonyBE3D KV24WX1UWhine from lh chan over normal sound, same on phone & scart skt - RH chan okSus MSP chip IC202 on "A" board with tuner. As this is a 60 pin sm chip & expensive the good chan was linked to both o/ps14-09-04
SonyBE3D KV25X1UE/W faultyQ800 in pin cush out cct leaky14-09-04
SonyBE3D KV25X1ULED flahes 19 times at sw onMultiple devices not acknowledging - Fuse PS603 o/c14-09-04
SonyBE3D KV28WS2VOLUME VARIES, CHANNELS WIPE FROM MEMORY, UNUSUAL CHARACTERS DOWN SIDE OF SCREENREPLACE IC3 WITH PREPROGRAMMED NEW TYPE14-09-04
SonyBE3D KV28WS2UAt sw on reverts to st/by with LED flashing twiceMeasure volts at collector Q606 (located in the middle of the PCB towards the right edge), if it stays at 0V, then you need to replace or re-set the EEPROM, if it goes high - then overcurrent protection is activated, suspect faulty LOPT. After replacing the LOPT, collector Q606 should stay at 0V and the set should come on, however with some software versions, the error code 2 will remain in the memory and you need to clear it manually.To clear the error code from the EEPROM you can replace it with a blank one, but it is much easier just to re-set it. While your error code 2 is still flashing, press on the remote control: [5], [-/--], [5], [9], [Standby], [i], [5], [vol+], [TV]. The set will come on in the service mode with TT-- on the screen, press [MENU] and write down all the settings for picture, geometry and sound. Then press [MENU] again to return to TT-- screen. Enter 49 to clear the EEPROM, and switch the mains off. Now go back to the service mode (TT-- on the screen), enter 24 to set destination "UK", then press [MENU] and enter all the settings what you have written down. The sequence [5], [-/--],[5],[9] sets the TV on program 59; the sequence [Standby], [i], [5], [vol+], [TV] is used to enter the service mode. In order to execute the command TT49 (re-set EEPROM), the TV must be on program 59.14-09-04
SonyBE3D KV28WS2UBUZZING NOISE THROUGH SPEAKERSCHECK EARTH CONNECTION ON CN303 PLUG FOR O/C OR DRY JOINT14-09-04
SonyBE3D KV28WS2UDead at sw on - will produce a click from relay after a period of time. When G2 advanced, line collapse noticedCheck for dry joints around scan coils plug, check R870M for o/c 1R, 1w14-09-04
SonyBE3D KV28WS2UEEPROM corruptionCaused by flashover of red gun in crt - crt replaced under warranty (if lucky)14-09-04
SonyBE3D KV28WS2ULED flashes twice aft LOPTx replacement to cure dead setCheck EEPROM 24C32 in IF sound module by replacement. Enter service mode & at TT promt enter country code 24 (UK system) - prevents need for setting each chan band when tuning14-09-04
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