THOMSON 32HA3103: Voice Fades After 15-20 Mins, Sound Issues & No Remote Control - Solutions?

Question

Hello
Patient as in the subject. Turns on normally and displays image properly. After about 15-20 minutes, the sound stops playing - there is complete silence. Turning up the volume changes nothing. A momentary shutdown restores the sound for a minute or two.

I don't have a remote control and I can't upload the latest firmware.

Do you have any suggestions apart from a possible CD replacement?

Plate markings: 40-mt31epa-mab2hg

Adewag · Accepted Answer

The pad should be soldered with the entire surface. The heat sink probably won't hurt.

Adewag · Accepted Answer

You misunderstood me. I am not suggesting that the factory soldered badly. The rest in # 6 . happy

Józef Kłeczek · Accepted Answer

Hello
Please carefully check Q101, Q102 and D101 and their surroundings. Most often, touching the tip of the meter to any of these elements restores the voice for a moment. The measurement with the meter does not show any damage to the element, while the replacement restores the voice permanently. Heating the audio amplifier circuit actually accelerates its decay, but the elements Q102 Q102 and D101 are so close that it increases their temperature causes the sound to drop out.
best regards

Adewag · Answer

TPA3110 for replacement. For checking, heat up with a hotem, the fault will be right away.

11111olo · Answer

If this power amplifier heats up so much, maybe it would help to stick the heat sink?

11111olo · Answer

It's probably soldered - that's how it came out of the factory.

Adewag · Answer

You solder the pad wrong, and the heat sink may not help. I have had several such cases. Someone replaced the amplifier and soon the fault returned. Especially when, for example, the volume of the TV volume is at maximum, and the decoder is at least. It does not matter what the volume level satisfies the user.

The so-called stereo audio power amplifier module power amplifier working in digital class D. Amplifier circuit based on the TPA3110 integrated circuit. The maximum output power is 15W for each left and right channel. The supply voltage to the system with a voltage ranging from 8V to 26Vdc.

11111olo · Answer

I understand it all.
It is rather unlikely that the power amplifier will bend badly on the conveyor belt as it passes through the furnace.

I'll take care of it after Christmas and let you know the result.

badael · Answer

Replace SMD cond. with 4 and 11 pin TPA3110 (1uF 16V).

karelkarel · Answer

I have this tv model in the workshop. In my case, the SMD C138 (1uF) capacitor was faulty.

11111olo · Answer

I shorted one leg of the transistor to ground near the TPA and that resolved the matter.

[Solved] THOMSON 32HA3103: Voice Fades After 15-20 Mins, Sound Issues & No Remote Control - Solutions?

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