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Auto Stereos

Philips CE130 / 55 without audio

simpe22

918

hace 6 años

Hi, this stereo came with the inconvenience that it did not light, I checked it without a fuse, I put one on it, I kept checking and I found the input diode in poor condition (D1) I did not find anything else in bad condition in the first revision I fed it and the stereo turns on, I go on to mount it in the housing and it did not turn on the arranaba source and sd it turned off, I measure between the positive and negative cables and I took the disassembly short and the short one went off and on again (surely something touched the shell maybe diode legs a bit long) mount everything and turn on a speaker but does not emit sound. If you can help me I would appreciate it since I do not want to go one to change the ampli.

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Carlos Quiroga

1.400

hace 6 años

Hello, first check if the audio circuit receives power, if so, it proves if the audio signal arrives at the inputs, if it arrives and the IC does not come out it is damaged.

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simpe22

918

hace 6 años

Hello! See the result of my measurements? To test if audio enters the ampli, should I test in IN 11 and IN 12? Also 14 and 15 is not it?

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Carlos Quiroga

1.400

hace 6 años

Yes it is.

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simpe22

918

hace 6 años

Solved Bad insulation and played the amplifier in the housing.

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jomi

38.143

hace 6 años

Check voltages of audio output IC LV47002 and pre Go diagram

CE-130-130-X Diagrama.pdf [1.76MB]

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simpe22

918

hace 6 años



hace 6 años

Pin 4 - 4.34v. Pin 10 - 5.62v. Pin 6 - 11.97v. Pin 20 - 11.97v. Pin 11 - 5v. Pin 12 - 5v. Pin 14 - 5v. Pin 5 - 10.28v. Pin 3 - 10.28v Pin 7 - 10.28v Pin 9 - 10.28v Pin 17 - 10.28v. Pin 19 - 10.28v. Pin 21 - 11.74v. Pin 23 - 11.58v Those are the voltages of the LV47002 (stereo on and in FM) I leave the datasheet of the datasheet for the references of each pin. Tensions were taken directly from the legs of the IC.

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simpe22

918

hace 6 años

I clarify that I am feeding it with 11.96v

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jomi

38.143

hace 6 años

And pin 4? You should have 5V

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simpe22

918

hace 6 años

For me it is in range, or not? I will try to feed it with fixed 12v since this source does not reach 12 to see if it delivers the 5v

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Carlos Quiroga

1.400

hace 6 años

If pin 4 must have 5V, the minimum is 2.5V.

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simpe22

918

hace 6 años

When you increase the volume above 19 you start to hear loud but very distorted and with cuts I raise it more and it does not cut but it sounds horrible. When I lower ppr below 19, I listen very softly but well. I already disassembled the front panel and maintained the potentiometer since it had a lot of dirt

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simpe22

918

hace 6 años

Fixed a bug, the ampli was replaced and the sound and power were recovered.

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Carlos Quiroga

1.400

hace 6 años

That is to say, it was the first thing I commented, always before distortion or low audio performance 90% is amplif. output Congratulations and greetings.

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