Was wondering if anyone has any ideas on points to clean or parts to replace. I've had a broken down dusty dead cockroach ridden VZ-2000 rotting away in the basement. Found one in awesome condition locally but determined the amp board was bad on it. Maybe one of the amp chips was bad or it had some bad caps I dunno. After a bunch of effort and soldering I swapped out the amp board from my old broken one and it sounds great.
Everything is now working on this but the tape function. Initially I got almost no sound from tapes. I took apart the REC/PB switch and gave it a thorough clean and when I put it back on I got the left channel back! The right channel is still quiet but seems to be getting slightly louder but it doesn't even register on the VU meter.
I measured the voltage at the test points and read 380 mV on both channels which is lower than what the service manual says they should be at (580mV) but means that I should be getting sound. I know the voltage is off because of the board swap but I can fix that at least.
I'm wondering if there's any other part I should clean on this? I gave the function switches a really good spray and I don't hear any popping or anything when I push them so I don't think it's those. I sprayed fader deoxit into all the sliders and they all work fine so I don't think it's those. I sprayed deoxit in the dolby switch but it didn't improve either. I'm tempted to just shotgun the tape/amp board with new caps and try to swap parts with the spare board at this point but it's a lot of work. Hoping for a lead here.
Here's a vid of the tape function in action where you can see the right channel doesn't register on the VU and the REC function recording radio perfectly on both channels:
https://goo.gl/photos/hp5Z6b1WwDfjR9Gr6
I also recorded a tape and played it back on another box and it sounds great so I think the alignment is good enough.
Everything is now working on this but the tape function. Initially I got almost no sound from tapes. I took apart the REC/PB switch and gave it a thorough clean and when I put it back on I got the left channel back! The right channel is still quiet but seems to be getting slightly louder but it doesn't even register on the VU meter.
I measured the voltage at the test points and read 380 mV on both channels which is lower than what the service manual says they should be at (580mV) but means that I should be getting sound. I know the voltage is off because of the board swap but I can fix that at least.
I'm wondering if there's any other part I should clean on this? I gave the function switches a really good spray and I don't hear any popping or anything when I push them so I don't think it's those. I sprayed fader deoxit into all the sliders and they all work fine so I don't think it's those. I sprayed deoxit in the dolby switch but it didn't improve either. I'm tempted to just shotgun the tape/amp board with new caps and try to swap parts with the spare board at this point but it's a lot of work. Hoping for a lead here.
Here's a vid of the tape function in action where you can see the right channel doesn't register on the VU and the REC function recording radio perfectly on both channels:
https://goo.gl/photos/hp5Z6b1WwDfjR9Gr6
I also recorded a tape and played it back on another box and it sounds great so I think the alignment is good enough.