| Make | Model | Problem | Solution | Date |
| | | |
| Found: 901
|
| Hitachi | C2546TN | St/by only | Drys 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 |
| Hitachi | C2546TN | Stuck in st/by prot cct in operation | 12v supply low - ZD952 11v zener leaky | 14-09-04 |
| Hitachi | C2546TN | Tripping | Check R950 68k, R951 12k, R952 82k 1/2w & check for dry joints | 14-09-04 |
| Hitachi | C2548TN | Jumping pic | FOP chip responsible | 14-09-04 |
| Hitachi | C2556/2586 | HT setting | 152v | 14-09-04 |
| Hitachi | C2556TN | Dead | R950 68k ?w hi res (near ht pot) | 14-09-04 |
| Hitachi | C2556TN | INT DEAD | Dry joints set HT pot | 14-09-04 |
| Hitachi | C2556TN | Int dead | check dry joints IC951 | 14-09-04 |
| Hitachi | C2556TN | Int goes dead only to reapear several secs later | Dry joints pot R950 - tight up against plastic cradle | 14-09-04 |
| Hitachi | C2556TN | Int goes to st/by or off | Happens when disturbed mainly - check wire links at front of pcb for dry joints | 14-09-04 |
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| Hitachi | C2556TN | Int loss of sound/pic | Dry joints L7805 IC951 5v reg | 14-09-04 |
| Hitachi | C2556TN | Int off when disturbed | Check HT pot VR950 by replacement- & check R950 | 14-09-04 |
| Hitachi | C2556TN | Trips 3 - 5 secs aft sw on | R950 68k hi res | 14-09-04 |
| Hitachi | C2557N | Weak sound & low contrast | C758 100nf S/C ALB line. | 14-09-04 |
| Hitachi | C2558 | repeated failure of TDA3654 field o/p chip | dry joint scan coil tag also replace flyback boost cap to pin 6 (47 or 100µ) | 14-09-04 |
| Hitachi | C2558TN | High HT | R941 100k, ZD941 10v zener - HT = 157v | 14-09-04 |
| Hitachi | C2558TN | Slow start up | 12v rail low - C933 2200µ 25v | 14-09-04 |
| Hitachi | C2558TN | st/by - wont come out of using front controls | use hset - reason u/k | 14-09-04 |
| Hitachi | C2558TN | Tripping to st/by | C931/2/3 on sec of sm trfmr - Note R/C reqd to bring set out of st/by | 14-09-04 |
| Hitachi | C2564 | No Txt | ENTER 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 |
| HITACHI | C2564N | FRAME COLLAPSE | REPLACE FRAME IC AND C604 IC**TDA8178, 100MFD63V | 14-09-04 |
| Hitachi | C2564TN | Dead - s/c lop tr &/or e/w mod diode | Check L651 e/w coil for drys also L650 & Q651/652 | 14-09-04 |
| Hitachi | C2564TN | Dead apart from LED flickering | F902 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 load | 14-09-04 |
| Hitachi | C2564TN | Field & E/W int | Check for dry joints esp on FOP chip (hidden under plastic strut) | 14-09-04 |
| HITACHI | C2564TN | INT EXCESSIVE WIDTH SEEMS LIKE A DRY JOINT | REPLACE Q752 | 14-09-04 |
| Hitachi | C2564TN | INT EXCESSIVE WIDTH SEEMS LIKE A DRY JOINT | REPLACE Q752 | 14-09-04 |
| Hitachi | C2564TN | lack of height, cramp & int field collapse | dry joints IC601 TDA8178 also pin 2 low volts (16 instead of 27v) R609 1R hi res | 14-09-04 |
| Hitachi | C2564TN | P2 locked on AV1 | 1) 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 |
| Hitachi | C2564TN | Tripping - blows 630mA fuse on E/W board | Q651, Q652, D704 all caused by L651 & R609 1R0 & FOP chip TDA8178S | 14-09-04 |
| Hitachi | C2564TN G100 | Tripping | Dis 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 L650 | 14-09-04 |