Hi there
I have recently restored a TASCAM M-600. All is running pretty well but an unusual issue has just popped up.
I noticed that the lights in the VUs (all 16 PGM and the Master VUs) occasionally go dim for about 1/2 a second then come back on. The audio is not affected during this time, i.e. it does not drop out - just the VU lights go off/on very briefly. I dont know if the actual VU meters stop or its just the lights cause it is very random and only occasionally so I really only notice it out the corner of my eye then they are back again. So I think its juts the lights but it may be the actual meters stop working as well. I will try to clarify but I can, but as I said it is only occasionally and at random, so hard to actually check.
I am not sure were to start looking to troubleshoot this issue? I assume on the EXT METER PCB ASSY? I believe from the circuit diagrams that is were the power for the VUs comes in?
I though maybe the meter bridge wiring but the fact they all go off/on at the same time makes me think its something that affects them all from one source (ie the meter PCB)
Any advice would be super...
EDIT - It is only the lights that go out - the VU meters still work and audio is not disrupted - if that helps point to a place to start looking
UPDATE - I seem to have resolved the issue (for now at least). I changed the capacitors in the 8v circuit on the PSU and also notice the fan was not working - the PSU was getting VERY hot. I replaced the fan and it now runs pretty cool and I have not had the VUs dim since. Not sure if it was the caps or the fan or both but it seems to have fixed the issue for now!
Thanks
I have recently restored a TASCAM M-600. All is running pretty well but an unusual issue has just popped up.
I noticed that the lights in the VUs (all 16 PGM and the Master VUs) occasionally go dim for about 1/2 a second then come back on. The audio is not affected during this time, i.e. it does not drop out - just the VU lights go off/on very briefly. I dont know if the actual VU meters stop or its just the lights cause it is very random and only occasionally so I really only notice it out the corner of my eye then they are back again. So I think its juts the lights but it may be the actual meters stop working as well. I will try to clarify but I can, but as I said it is only occasionally and at random, so hard to actually check.
I am not sure were to start looking to troubleshoot this issue? I assume on the EXT METER PCB ASSY? I believe from the circuit diagrams that is were the power for the VUs comes in?
I though maybe the meter bridge wiring but the fact they all go off/on at the same time makes me think its something that affects them all from one source (ie the meter PCB)
Any advice would be super...
EDIT - It is only the lights that go out - the VU meters still work and audio is not disrupted - if that helps point to a place to start looking
UPDATE - I seem to have resolved the issue (for now at least). I changed the capacitors in the 8v circuit on the PSU and also notice the fan was not working - the PSU was getting VERY hot. I replaced the fan and it now runs pretty cool and I have not had the VUs dim since. Not sure if it was the caps or the fan or both but it seems to have fixed the issue for now!
Thanks
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