| Make | Model | Problem | Solution | Date |
| | | |
| Found: 34
|
| Hitachi | A4 | Dead - tripping with relay clicking in time | Connect dummy load to removed R751 3R3 7w connection & HT ok at 150v with sound. IC601 Field/E/W chip proved faulty & D701/D701A | 14-09-04 |
| Hitachi | C2846TN A4 | Raster still present in st/by | D4470 1N4531 leaky (RHS of the heatsink audio IC4450), working diode must have 28V at one end and 3.5V at the other end. | 14-09-04 |
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| Hitachi | C2846TN A4 | St/by only or int goes to st/by | Dry joints R957 (near Q950 heatsink) & check drys on IC951, 952 etc | 14-09-04 |
| Mitsubishi | C25A4STX Euro 4 | Dead , Line OP transistor SC. | Replace C906 47uF 63v , R901 4R7 10W Q901 , IC901 , D907 , D908 ( both RD3.OFB1 ) and C975 47uF 63V. | 14-09-04 |
| Mitsubishi | CT25A4STX | Buzzing on LH speaker only | C909 - increase to 1000µ | 14-09-04 |
| Mitsubishi | CT25A4STX | DEAD | REPLACE TEA2261, D909 AND Q552 | 14-09-04 |
| Mitsubishi | CT25A4STX | Impurity - degaussing faulty | Replaced o/c Q903 JC501R - used BC639 in lieu (same pin out) - in degaussing relay driver. | 14-09-04 |
| Mitsubishi | CT25A4STX | NO SOUND, TEXT OR NICAM | FIT IC702 KIT | 14-09-04 |
| Mitsubishi | CT25A4STX CT29A | DEAD , NO LINE DRIVE , CHECK FOR MOMENTARY VERY low | REQUIRES FEEDBACK FROM LINE STAGE OR WILL SHUT DOWN. O.C. PIN , CHECK FOR VERY LOW AMPLITUDE PULSE , ON SCOPE , REPLACE DRIVE TRAN | 14-09-04 |
| Mitsubishi | CT29A4STX | Hum from 1 speaker in st/by only | Q954 2SB1135 | 14-09-04 |
| Mitsubishi | CT29A4STX | NO SOUND | CHECK PROGRAMMING , THEN try Text if not working MAY BE MAB8461 ON TEXT BOARD. | 14-09-04 |
| Mitsubishi | CT29A4STX | No sound | 1000µ 35v cap in psu had leaked over print & damaged earth return | 14-09-04 |
| Mitsubishi | CT29A4STX | N-S adjust out | Q4009 on the
pincushion pcb | 14-09-04 |
| Mitsubishi | CT29A4STX | Red bleeding on white back grounds | Remove from PCB R606, R607, R608 and increase R609 to 56R | 14-09-04 |
| Mitsubishi | CT29A4STX Euro 12 | Buzz from spkrs in st/by | C960 1000µ 50v | 14-09-04 |
| Mitsubishi | CT29A4STX Euro 12 | Int NICAM Beacon on screen &/or buzz or hiss on sound | Dry joints IF can - L9 & pins 20-24 of IC2 | 14-09-04 |
| Mitsubishi | Euro 12 CT25A4STX | Field lin | C454 4µ7 | 14-09-04 |
| Panasonic | Alpha 4 | Blank raster - sound ok - same on scart; on Txtshows "P100" at the top left and "*** TXT ***" flashing at the
bottom centre of the screen. | Replace IC3002 (M52472P) on the "H" panel. | 14-09-04 |
| Panasonic | Alpha 4 | Blank screen - OSD OK | 9v supply to IF proc chip IC101 low at pin 41. R170 56R hi res | 14-09-04 |
| Panasonic | Alpha 4 | Crackle from lh speaker | R2081 10k sm cracked | 14-09-04 |
| Panasonic | Alpha 4 | Field - height increases when heated with twitching | C402 0µ33 mylar cap leaky in ramp gen cct | 14-09-04 |
| Panasonic | Alpha 4 | Field cramp & buzz on sound | TDA3654 fop chip | 14-09-04 |
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| Panasonic | Alpha 4 | Inside the Panasonic Alpha 4 Chassis | See TV Mag June - Sept 1995 | 14-09-04 |
| Panasonic | Alpha 4 | int lines across pic | UHF tuner faulty | 14-09-04 |
| Panasonic | Alpha 4 | No pic - sound ok | R539 10 ohms fuse resistor in supply to line driver transistor O/C. | 14-09-04 |
| Panasonic | Alpha 4 | OSD consist of black boxes only - pic & Txt ok | C3304 0µ01 leaky & R3309 820R hi res | 14-09-04 |
| Panasonic | Alpha 4 | Shuts down at sw on with a splutter - HT only 60v | LOPTx | 14-09-04 |
| Panasonic | Alpha 4 | Won't power up - works if pins 3 & 4 of opto shorted | Q890 2SC3311-R leaky | 14-09-04 |
| Panasonic | Alpha 4 TX25X1 | No pic - sound ok | TDA3654 FOP I.C. and 800mA fuse next to it | 14-09-04 |
| Panasonic | Alpha 4 TX25X1 | PSU o/ps die aft brief period at sw on with field coll noticed | VDP3108-A-29 vid/deflect proc chip - NLA. Fit replacement kit with alternative chip | 14-09-04 |