VU meter problem SC-5330 cassette deck

[jd-audio]

I cleaned a new-to-me Sansui SC-5330 cassette deck. Therefore I also removed the face plate.
All worked well after cleaning and testing (without the face plate on).
Including both analog VU meters and their build-in meter lights.

Problem:
After putting back the face plate (it took some doing to get both the VU meters back in place on the face plate), the LEFT VU meter is "dead" and BOTH VU meter LIGHTS are "dead" too.
Music is playing on both channels and the LED VU peak meter is working as well. Therefore I suspect the VU meters wiring or its circuit.
As all was working well before putting back the face plate, I'm thinking (hoping?) for a minor problem. After visual inspection nothing is broken or damaged (I allways try to be very gentle with my Sansui's).

Who can help me solve this?

 

[jd-audio]

UPDATE:
Good: Lights are working again, seemed to be a bad contact in the meter assembly.
Bad: VU meter is still dead. I read no signal over the two leads on the circuit board where the two wires to the meter origin from.

 

[Zeacon69]

touch up solder the board with some solder and a iron

 

[Zeacon69]

also dont start turning vr pots inside on the boards, it will be a pain to calibrate

 

[avionic]

Check for pinched or broken wires...

 

[jd-audio]

touch up solder the board with some solder and a iron
also dont start turning vr pots inside on the boards, it will be a pain to calibrate

This sounds like good advice, thank you.

 

[Zeacon69]

Did you get it working???

 

[jd-audio]

Did you get it working???

Unfortunately not, after touch up soldering the problem was still there.
I have renewed both meter lights (one of them had a broken glow wire that sometimes "connected" and sometimes not) and decided (for cosmetic reasons) to connect both meters to just one meter circuit. After this I recalibrated meter output using a calibration tone (and a second cassette deck for double check). This way I can enjoy the deck "fully working" and still can have it correctly repaired in future times.

It is a very nice cassette deck (I love the looks), all other functions work perfectly and the sound is very good. I have a (more recent) Sansui D-550M 3 head, 2 motor deck that I like a lot and I hear no difference between the two.

-John-