Sony TC-U5 VU issue

[GerhardGilje]

Hi,
New to this forum and a novise on reparing audio equipment, but I like to learn. I had a problem with VU meter jumping around. This was fixed with some detox spray on the record mechanisem. However, now when the left VU is on 0db the right VU is between -3 and -2db with a 400Hz signal input. I cannot find any pot adjustents for this. In the service manual under Level Meter Calibration there is only information about Pattern connection for 0VU (Open, A, B, A-B) Don't know if this means that there is some jumper wires to change between A and B. Make no sense for me.


Or is it just a matter of only adjusting the screw in the front of the VU meter to 0db?

The next I need to do is Record Level adjustment. Tried a little bit, but there is no reaction when turning the pot RV202 or RV102.

Hope that anyone can help me with this.
Thanks.

 

[Bradbrews]

Sure seems like you jumper or solder bridge the connections you want. Fixed adjustment rather than a pot. You could tweak the valve of the resistor if you really wanted to.

 

[GerhardGilje]

Update. When recording some music the VU meter went to max 0db. But on playback they only went to between -10 - 7db. I have use a old Sony tape.
When I took a new TDK tape and did the same recording everything was okay. 0db on both record and playback. So, no more use of old tapes