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Panasonic Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
PANASONICTC14C4/20C4
Burning f801 and f802Ic802, replace c812
PANASONICTC14D1/20D1
Folding the image at the topC412
PANASONICTC14C1/20C1
Loud sound and won't change channelsR881, r882
PANASONICTC-14C2/20C2
Unstable verticalC410
PANASONICTC-14C2/20C2
Dead and beepingFlyback
PANASONICTC-14C2/20C2
Image shakes when adding volume16v power supply low and r863
PANASONICTC-14C2/20C2
Image very bright and does not darken19
PANASONICTC20C6
Inoperative, relay knockingOpen r802 or r803 (470k)
PANASONICTC-29V50B
Burning of ic802(str), d184, c812, q804In the first production batches the resistor r841 was assembled very close to the heatsink, which will cause cold solder heat dissipation and oxidation at its terminals. as this resistor is located between the drive and the base of the power transistor, this bad contact will cause IC802(str), d814, c812, q804Solution: 1) after the burned components are replaced, the resistor r841 must be removed, checking that its value has not been replaced, if it has been, it must be replaced. if its value is ok, its terminals should be sanded and resoldered into its position on the board. 2) please take this countermeasure for all devices that pass through an authorized workshop for maintenance, whether the device is presenting or not problems at the power supply.
PANASONICNI
PANASONICTC-29V50B
Device without soundYsa02 (Sixa1279s)
PANASONICTC-20/29G11 /
Does not turn on, without 9v power.D602
PANASONICTC-29V50B
Burning of ic802(str), d184, c812, q804Cold solder not resistor r 841
PANASONICTC-14/20C7
Weak image, tune with drizzleC112= 10nf
PANASONICTC-14/20C7
TV arms and disarms, (relay knocking)La-7837 and c456= 100uf
PANASONICTC-14/20C7
Vertical closedC116=10nf
PANASONICTC-29AV1
DeadQ501= 2sd1175
PANASONICTC-29A9
Turns off after a few minutesD555 = 1n4148
PANASONICTC-21V50
DeadIc801 e r808=o,47
PANASONICTC-14C1-U
Out of tuneR61= 8k2