JVC RC 838 VU meter not working

[Kirill1012]

Hello everyone,

Working on my JVC RC 838. Right side VU meter not working. Meter itself is good.
Checked signal on the connection joint - no signal.
Cleaned meter VR104 but it looks a little corroded from outside.
Are there any known issues with meter amp ?

Please let me know what should I check.

Thank you so much !

 

[Reli]

Have you cleaned the function selector and the recording bar circuit?

 

[Kirill1012]

Have you cleaned the function selector and the recording bar circuit?

I did clean all the switches including function, biphonic and rebuild all the sliders. One of the channel recording sliders (VR301 Left) is bad and I am waiting for conductive paint to rebuild it. But the right slider VR 401 is good and clean 50 K Ohm. Checked VR104 and it is good also. What else should I check ?

Thank you

 

[Reli]

When I said recording bar, I meant the long silver bar on the circuit board, behind the cassette mechanism. Actually there might be 2 bars in parallel, one for each channel. The bars have a plastic lever connecting them to the Record key.

 

[Kirill1012]

When I said recording bar, I meant the long silver bar on the circuit board, behind the cassette mechanism. Actually there might be 2 bars in parallel, one for each channel. The bars have a plastic lever connecting them to the Record key.

Hi. I did rebuild both of them. They are fine. I actually solved the issue last night. There was a broken trace in the 704 connection. Just soldered wire to bypass it. Works fine now. The old equipment so prone to trace brakes on PCB.

Thank you for your help.