bernatvm

Lexcion PCM 70 Output Problems
« on: January 14, 2020, 07:41:36 AM »
Recently bought a second hand PCM 70 and I have some problems with the output. I only get the left side to output sound and only when cables are plugged both to L and R outputs. This happens whenever the unit is in bypass or not.

The manual says that when only one of the two outputs is connected signals are summed, but in my case I need both cables to get sound out of it. Sounds like bad connector, but I don't know. Anyone had this problem before?

I checked different cables, bal and unbal, and always same behaviour. Service manual attached.


mrclunk

Re: Lexcion PCM 70 Output Problems
« Reply #1 on: January 14, 2020, 08:42:19 AM »
If you have a scope, or even just a small speaker u could probe around the outputs to see where the signal dies? Do you have the circuit?

bernatvm

Re: Lexcion PCM 70 Output Problems
« Reply #2 on: January 14, 2020, 08:52:39 AM »

bernatvm

Re: Lexcion PCM 70 Output Problems
« Reply #3 on: January 14, 2020, 10:43:23 AM »
After digging a bit into the schematic I think it might be Q1 that's shorting signal to ground, ethier because it's blown or because its recieving voltage when it shouldn't. I'll test later.

bernatvm

Re: Lexcion PCM 70 Output Problems
« Reply #4 on: January 14, 2020, 03:31:46 PM »
Removed it and it's working perfectly now. I will buy the part and install it again later.


 

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