Panasonic TV Repair: Common Faults and Solutions.
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Results: 2880
Results: 2880
Panasonic Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| PANASONIC | ALPHA 2W | No sound or vision - heaters & eht present | Choke l853 tlt030l119c attached to 12v reg o/c | ||
| PANASONIC | ALPHA 2W | No signals - r/c function slow and erratic | Tuner faulty even tho connecting ext dc supply to bt pin produced signals (prescaler fault) - repaired at mces - rc slow operation normal with lack of sigs | ||
| PANASONIC | ALPHA 2W | No picture, only blank raster | L303 10uf o/c in 12v supply. i found leaky zener d171, after replacing it the ic1204 was still running hot, but with 4 volts on the output at this time. when i disconnected pin28 of microprocessor, the supply was at 5 volts and the regulator wasn't hot. pin28 measured 1kΩ to ground. when a new chip arrived, it measured 1kΩ as well, the only difference is when you freeze the faulty ic, resistance goes up to 3kΩ, when you freeze the new ic, resistance goes down to 0.4kΩ. after replacing the micro controller, ic1204 5v regulator was running cold. the micro controller was 15 uk pounds +vat from hrs. | ||
| PANASONIC | ALPHA 2W | Lines on pic & whistle | Str50401 - use genuine replacement | ||
| PANASONIC | ALPHA 2W | Line output transistor sc | Check for dry joints on line drive tx ( often invisible ) | ||
| PANASONIC | ALPHA 2W | Goes bright red then trips off | Q353 red o/p tr coll drops to 3.5v - l353 180µh coil o/c | ||
| PANASONIC | ALPHA 2W | Field collapse | Ic501 tda2579a & check c403 0µ01 pin 2 ic for leak | ||
| PANASONIC | ALPHA 2W | Faint line shading down right hand side. | C858 ( 1 , 000uf , 25v ) leg not through pcb. | ||
| PANASONIC | ALPHA 2W | Excess width & no e?w | Crack in print by pin 1 loptx | ||
| PANASONIC | ALPHA 2W | E-w dist | L752 s/c or c754 180pf leaky in base to q751 | ||
| PANASONIC | ALPHA 2W | Dead check for 0.4v pin 2 ic801 if missing | Check r803 and r827 ( 220k ) if ok replace r815 ( 5r6 ) q801 & q802 & str54041 | ||
| PANASONIC | ALPHA 2W | Dead - loptr 2sd1441 s/c, r567 1a link o/c | New parts went way of originals - ht high due to str54041; also damaged citac chip sab3035 causing blank raster/no sound via aerial or av | ||
| PANASONIC | ALPHA 2W | Dead - ic1204 (st/by 5v reg) overheats with only 1v on o/p | Zener d171 ma4082 is leaky, microprocessor ic1203 mab8461pw134 is faulty. | ||
| PANASONIC | ALPHA 2W | Dead | No volts pin 2 ic801 chopper; check r803 & r827 220k | ||
| PANASONIC | ALPHA 2W | Blowing line transistors. | Spray on line driver transformer. | ||
| PANASONIC | ALPHA 2W | At switch on runs for 2 sec and goes dead | Ht too high at 180v, ok if running on a dummy load- str54041 is faulty. | ||
| PANASONIC | ALPHA 2M TX21MD3 | Dead, relay clicking for three or four minutes, then works o/k | C807 & c806 ( 100uf 50 volt ) in power supply primary | ||
| PANASONIC | ALPHA 2A | Smeary video | Check c684 on v module 22mfd bi-polar - use 2 in series. | ||
| PANASONIC | ALPHA 2A | Noise on nicam | C2572 - c2573 220pf | ||
| PANASONIC | ALPHA 2 TX28W2 | Tries to start 3 times then dead | Loptx - focus volts too high - replace |