TYPICAL TROUBLESHOOTING OF TV "PANASONIC"

1). PANASONIC TX21K1T.

When you turn on the TV and switch programs, the color disappears for 5-10 minutes, red flashes are visible at the top of the screen. We managed to get rid of the defect after installing the C-120pf, from the 15 feet of TDA8395P, to the ground. This defect was eliminated in several televisions with this chip.

2). PANASONIC TC25V50R, TC29V50R.

Does not turn on. Break R833 22 Om in the BP. Already more than three cases.

3). PANASO

NIC TC-21L3 RTE.

Does not come out of the j. Mode. When on In working and off. In J. Modes voltage at 29 ou. The microcontroller MN152810TTC3 varies from 0 to 5 Volts. Found a crack on the case of the transistor Q803 - 2SC1473. After replacing the transistor TV. Switched on, but now no longer turned off in "standby". The voltage is 29 vyv. The microcontroller changed from 0 to 0.5 V. when switching from a slave. In J. Modes. During the check, I established that the Zener diode D820 (in the base circuit of Q803) has a slight leakage. After replacing the zener diode. Earned.

4). PANASONI TX-21F1T.

Very quiet sound from the air, from the AV input - normal. After replacing the multifunctional IMS AN5192K-B, the normal operation of the TV set was restored.

5). Fault.

The "AN5192K-B" chip is the cause of many problems of Panasonic devices in which it is installed. Example: - There is no color when viewing PAL-video programs, SECAM-in color. In three cases out of three, it's native! Do not forget to choose the right color system on TV.

6). TV Panasonic, model TX-28WG25C.

When you turn on the TV works steadily, at different intervals of time there are bands and twitches, the image disappears. It may not work at all, black screen. Tip - throw the switch on the mixer (in the box where the antenna is stuck) and put the jumper in the lower position. Next, take out both cards of the radio channel (stand next to the tuners) to evaporate the screen and replace the capacitor 470mf-6.3v, preferably at a higher voltage. The capacitor gives leakage - as a result of this, two interlayer joints rot underneath. Punch holes, insert wires tinned and dissolve on both sides.

7). PANASONIC TC-21S1RCP.

After turning on the minutes after 10-30, the screen starts to twitch horizontally and the TV turns off for a second, and everything repeats. The cause is a failure of STR51424 (poor cooling). Replace this STR'ku, increase the area of ​​the radiator and replace the clamp bracket on the STR with M3 screw and nut, drill a hole in the radiator. On this TV changed 4 STR, 1-I worked a month, the 2nd week, the 3rd three months, the 4th two years. No pattern. Or defective STRs or it is necessary to take the above measures, which have not yet been verified by me.

8) Panasonic TC-21S10R2, the chassis of the MX-3.

Does not turn on. Visual inspection of the power source showed: the bursted - 2SA1512 (Q805), 2SC3940 (Q802). In addition, of course, the key transistor is C5253, and in its emitter circuit, the R is inflated by 0.47 Ohm. Further verification showed: the break of the zener diode XA4068L (according to D806) by 6.8 volts and breaks R834-220 Ohm, R826-22 Ohm, R823-1.2k. Instead of the key C5253 (1500v.i and 18A!) Was successfully applied More cheap BU508AF.

9). Panasonic TC-14S15R.

A defect is a big "cut". Small size horizontally, depends on the brightness and plot of the image. The background of the network - 100 Hz on the image is not marked !!! Remedy - replace the network filter of the power supply unit with 270 μF for 400 V (loss of capacity).

10). Panasonic TC-21S1RCP.

Defect: does not go into operating mode. Cycles in the duty and working mode. It looks like overload in the load. If you add a 60 W light bulb to the + 123 V power rail, the TV turns on and works fine, but in standby mode it still cycles. The line voltage of the line scan +123 V was not reset to +1 V, and there was +123 V. Remedy: replace R812 - 33 Ω 1 W - broken.

eleven). Panasonic TC 21 - S10R.

Defect: The TV does not turn on, it's dead at night, being in the duty room. Elimination: Replace the bus bar + 50V D835-MA2580 - probit (this is a consequence). The real reason is the dry C805 (47 μf 35V) in the power supply.

Vlanat [email protected]

12). Panasonic TC-25F1.

The network got 380V (to "zero" the second phase wire fell). The mains fuse is 4A. Reason: two holes in the side wall of the 330μF / 400V capacitor. I replaced the tank and everything went off.

Alexey, Nizhny Sergi [email protected]

13). Panasonic TX 33 P100X.

A smeared image. Faulty stabilizer 2.5v (TL431) on the kinescope board.

Igor [email protected]

14). Panasonic TC-2150.

In the standby mode it works. When switching to the operating mode, a loud whistle is heard from the power unit indicating an overload. The voltage of the "+90 V" circuit is underestimated to +45 V. The horizontal output transistor is OK. Resistance of secondary circuits of TDX is normal. The cause of the failure is the breakdown of the TDX. Mark TDX TLF15644F1.