Panasonic TV Repair: Common Faults and Solutions.


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Panasonic Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
PANASONICALPHA 3
Dead - blows r822 4r7 5w & r555 lop fusibleLine drive wfm dist - c501 0µ1cap in line osc stage leaky
PANASONICALPHA 3
Dark pic getting worse with timeQ355 2sc3311 on crt base leaky (black level ref)
PANASONICALPHA 3
Dark blank raster with no sound or displayNo micro activity - dis serial & clock lines to txt panel to elliminate this cct; set works when this was done - ic3507 was faulty (mab8461pw13s)
PANASONICALPHA 3
Dark blank raster - no sound.C1251 ( 10nf ) leaky , main microcontroller & memory chips.
PANASONICALPHA 3
Colour varies - blue content reduces - intC352 330pf ceramic cap decoupling q366 emitter
PANASONICALPHA 3
Bright flyback lines across top of screen - very intFit kit tzsen001 consisting of replacement scan coil and fop chip
PANASONICALPHA 3
Black diagonal lines across pic - very intD329 zener diode was leaky ma4068 - stabilises supply to tda4670 ic302
PANASONICALPHA 3
After 5mins pic + sound disappearStuck in reset c1251 10nf
PANASONICALPHA 2W TX25T2
Field - height excessive with top foldoverR469 150r o/c (under white ceramic res by loptx)
PANASONICALPHA 2W TX25T2
Shuts down shortly aft sw on b4 raster appears - chan ind remainsBeing told to sw off by micro - lift link r1245 to disable - d1315 ma700 leaky
PANASONICALPHA 2W TX24W1
Bright red pic (or blue/green)Check relevant peaking coil on crt base (l351, 352, 353)
PANASONICALPHA 2W TX24T1
No picR390 120k 1/2w on crt base
PANASONICALPHA 2W TX24T1
Bright raster with fb linesD551 cooked - mounted just to the left of loptx under r557 [6.8Ω 1w] - also replace c554 10µ 250v
PANASONICALPHA 2W
Squealing.2sd1441 may check ok , drys on line driver transformer.
PANASONICALPHA 2W
Squeal at sw on then dead except chan indQ551 lop tr s/c; d854 over volts s/c; r564 fusible o/c - check c808 10µ 63v & ic801 str54041m & dry joints
PANASONICALPHA 2W
Screaming psu onlyHt 175v (158v) - r567 o/c, c808 10µ 50v leaky
PANASONICALPHA 2W
Powers up but shuts down , prog no remains , shortL303 oc
PANASONICALPHA 2W
Poor washed out pic , normal sound . may be just blC626 10nf - decoupling pin 19 tda3505
PANASONICALPHA 2W
Pic pulling to rightDry joints line dr tfmr
PANASONICALPHA 2W
Non lin top of field scan or portion missingR469 underneath r551 10r 7w - could be either 150r, 270r or 470r 1w