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Electronics => Repair => Topic started by: kokopelli75 on January 11, 2025, 10:01:44 pm

Title: Victrola multi-player - No audio
Post by: kokopelli75 on January 11, 2025, 10:01:44 pm
Hello!

My mother has a Victrola Navigator multi-function player that stopped working after a storm. I checked out what I could - all player functions appear to work, but there is no audio output in either the speakers or the headphone jack. I suspect (with my limited knowledge) that the amplifier part of the device is toast. Photo of the suspected board is attached. There's separate boards for front display, record player, etc. This board has a section for power regulation and a section for amp. There's a UTC7266 7+7W dual bridge amplifier IC and a CSC2314F sound processor IC on the board. Visually, nothing is obvious. No caps look bad or bulging, no cooked resistors. Power regulators are providing voltages in range. Any thoughts on what I can check to identify the bad component(s)? Unfortunately, I'm limited to a multi-meter for test equipment. It's also a royal pain to take the board out, since there are so many multi-pin connectors on it. Lastly, I contacted the company, but they don't offer replacement parts.

Thanks!

[edit: updated image]
Title: Re: Victrola multi-player - No audio
Post by: kokopelli75 on January 12, 2025, 11:15:44 pm
Quick update, I did get datasheets for amp IC and sound processor.

Voltage on amp input is appropriate, and injecting noise on the inputs produced sound on the speakers. So... perhaps the sound processor IC is fried?
Title: Re: Victrola multi-player - No audio
Post by: Dougmc on January 13, 2025, 01:58:31 am
Post info on sound processee.
A cheap signal tracer would help u .
Title: Re: Victrola multi-player - No audio
Post by: kokopelli75 on January 13, 2025, 06:03:42 pm
Sound Processor is CSC2314F. I only found a Chinese datasheet, but had google translate it. See attached.

I jumped one of the radio inputs on the board directly to the amp IC input, and it sounded loud on the speakers. The volume control was ineffective, so the problem is definitely between the audio inputs and the amp chip.

Voltage regulators seem ok. There are two op-amp chips, but I see 0V on both Vcc pins, which seems bad.