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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: 901
HitachiC2546TNSt/by onlyDrys on all regulators check frame ic replace 68k feed to ht pot and check the 12k next to it replace ht pot set ht to 152 volts and dry on R791 14-09-04
HitachiC2546TNStuck in st/by prot cct in operation12v supply low - ZD952 11v zener leaky14-09-04

HitachiC2546TNTrippingCheck R950 68k, R951 12k, R952 82k 1/2w & check for dry joints14-09-04
HitachiC2548TNJumping picFOP chip responsible14-09-04
HitachiC2556/2586HT setting152v14-09-04
HitachiC2556TNDeadR950 68k ?w hi res (near ht pot)14-09-04
HitachiC2556TNINT DEADDry joints set HT pot14-09-04
HitachiC2556TNInt deadcheck dry joints IC95114-09-04
HitachiC2556TNInt goes dead only to reapear several secs laterDry joints pot R950 - tight up against plastic cradle14-09-04
HitachiC2556TNInt goes to st/by or offHappens when disturbed mainly - check wire links at front of pcb for dry joints14-09-04
HitachiC2556TNInt loss of sound/picDry joints L7805 IC951 5v reg14-09-04
HitachiC2556TNInt off when disturbedCheck HT pot VR950 by replacement- & check R95014-09-04
HitachiC2556TNTrips 3 - 5 secs aft sw onR950 68k hi res14-09-04
HitachiC2557NWeak sound & low contrastC758 100nf S/C ALB line.14-09-04
HitachiC2558repeated failure of TDA3654 field o/p chipdry joint scan coil tag also replace flyback boost cap to pin 6 (47 or 100µ)14-09-04
HitachiC2558TNHigh HTR941 100k, ZD941 10v zener - HT = 157v14-09-04
HitachiC2558TNSlow start up12v rail low - C933 2200µ 25v14-09-04
HitachiC2558TNst/by - wont come out of using front controlsuse hset - reason u/k14-09-04
HitachiC2558TNTripping to st/byC931/2/3 on sec of sm trfmr - Note R/C reqd to bring set out of st/by14-09-04
HitachiC2564No TxtENTER THE PROGRAMME MODE OF THE SET BY PRESSING AND HOLDING BOTH THE VOLUME + AND VOLUME - BUTTONS WHILE SWITCHING THE SET ON BY THE MAINS ON OFF SWITCH. AFTER A FEW SECONDS, THE CHANNEL DISPLAY WILL GO OUT AND THE SCREEN PROMPT "SERVICE 05" WILL APPEAR. PULL DOWN THE FRONT COVER OF THE REMOTE CONTROL HANDSET TO REVEAL THE VCR CONTROLS PRESS THE TWO RECORD BUTTONS TWICE. THIS WILL BRING UP THE "TUBE" MENU.PRESS THE TELETEXT BUTTON ON THE REMOTE HANDSET,AND THE WORDS "TEXT SERVICE MODE" WILL FLASH YOU CAN NOW ADJUST THE DATA CAPTURE WINDOW BY USING THE BLUE COLOURED BUTTONS ON THE REMOTE HANDSET IT IS RECOMENDED THAT YOU START BY PRESSING THE BOTTOM BLUE BUTTON.EACH TIME YOU PRESS THE BUTTON WILL MOVE THE ADJUSTMENT ONE "NOTCH". YOU MAY NEED TO PRESS THE BUTTON 7-10 TIMES WHEN THE TEXT CLOCK STARTS TO RUN NOTE THAT POSITION. THEN CONTINUE TO PRESS THE SAME BLUE BUTTON ON THE REMOTE HANDSET,NOTING THE NUMBER OF EXTRA PRESSES REQUIRED,UNTIL THE TEXT CLOCK STOPS ONCE AGAIN. NOW USING THE UPPER BLUE BUTTON,MOVE THE SETTING HALFWAY BETWEEN THE TWO POINTS YOU HAVE JUST NOTED I.E. IF THERE ARE EIGHT STEPS BETWEEN THE TWO POINTS AT WHICH THE TEXT CLOCK STOPS THEN PRESS THE UPPER BLUE BUTTON FOUR TIMES. WHEN YOU HAVE REACHED THIS POINT THE TEXT SHOULD RUN NORMALLY.PRESS THE STORE BUTTON ON THE REMOTE HANDSET AND THEN GO TO STANDBY TO EXIT THE SERVICE MODE. IF FOLLOWING THIS ADJUSTMENT THESE SETTINGS WILL NOT STORE, REPLACE I.C.2002 PART No E740007 14-09-04
HITACHIC2564NFRAME COLLAPSEREPLACE FRAME IC AND C604 IC**TDA8178, 100MFD63V14-09-04
HitachiC2564TNDead - s/c lop tr &/or e/w mod diodeCheck L651 e/w coil for drys also L650 & Q651/65214-09-04

HitachiC2564TNDead apart from LED flickeringF902 630mA o/c, LOPTr BU808DF1 & corr Tr BU801 s/c; D704 mod diode failed due to dry joints Q651, check L650. Note :- comps normally run hot - will not work with dummy load14-09-04
HitachiC2564TNField & E/W intCheck for dry joints esp on FOP chip (hidden under plastic strut)14-09-04
HITACHIC2564TNINT EXCESSIVE WIDTH SEEMS LIKE A DRY JOINTREPLACE Q75214-09-04
HitachiC2564TNINT EXCESSIVE WIDTH SEEMS LIKE A DRY JOINTREPLACE Q75214-09-04
HitachiC2564TNlack of height, cramp & int field collapsedry joints IC601 TDA8178 also pin 2 low volts (16 instead of 27v) R609 1R hi res14-09-04
HitachiC2564TNP2 locked on AV11) Select chan which has been locked in AV mode. 2) Press upper red key on double row of col buttons (AV mode). 3)menu appears showing chan posn & its AV setting/freq 4) At bottom of screen are AV options for that chan which correspond to col keys on remote. RED=AV1, GREEN=AV2, YELLOW=AV3, BLUE=AV4, VIOLET=AERIAL. 5) Press one of violet keys & off-air pic returns. 6) Press store key (diamond symbol). 7) Press "F" key to exit menu.14-09-04
HitachiC2564TNTripping - blows 630mA fuse on E/W boardQ651, Q652, D704 all caused by L651 & R609 1R0 & FOP chip TDA8178S14-09-04
HitachiC2564TN G100TrippingDis plug PL702 & connect bulb between plugs orange lead & chassis to check psu. HT should be 140v. If ok check lop stage - D704 BY228 & dry joints L65014-09-04
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