TAPESOURCE
New member
Hi everyone, It's been a few years since I own a Tascam 388, I bought it for a low price at the time cause it was a big project to make it work again. With lots of patience and reading through the internet, I’m almost at the point when everything works correctly. By the way, I first want to thank a lot all the Home Recording, tape machine community and sweetbeats for your amazing work and knowledge.
Not far from last week, I wanted to use my 388, turning it on, no sound in the L/R bus. I searched on forums to see if anyone already had this problem, and I came across the thread "New 388 problem". Turns out that the culprit was the MC14069 chip. I shotgun the chip, and the problem was solved. Amazing.
So now that this issue is fixed, last night I have planned to record a bit but I experienced a new issue:
The issue is : monitor 5 and monitor 8 are only fed by tape out 5 and tape out 8 respectively, even if nothing is assign to them.
1 - When MON pgm/cue is depressed (up) and no assign button is pressed: everything works correctly, I have sound via the Monitor section if I turn the mon gains up.
2 - When I press the assign LR button: Works fine, no sound as long as the faders are down. Channels 1 - 8 = works properly
3 - When MON pgm/cue is pressed (down): if nothing is routed to any MON bus, with faders all the way down: no sound through channel 1 to 4 and 6 and 7, but channel 5 and 8 are fed by tape out 5 and tape out 8. Beside this, everything works fine for the other channels.
I listened to the PGM OUTs at the back of the deck, when I assign something through PGM 5 and 8, everything works as it should.
When I try to send sound through PGM IN : I got nothing on PGM 5 and 8 as when I do it via the mixer.
I tried swiping the REC/PLAY PCB cards but the issue is fixed to channel 5 and 8.
Same with the DBX cards.
Maybe someone already experienced this, I really don’t know where the problem is, maybe it comes from the MC14069 chip again or somewhere there?
I don't know if i have good explanations skills so tell me if something is not clear...
For information : I have good soldering skills, I got an Oscilloscope and barely know how to use it, I’m learning how to troubleshoot etc…
Thanks a lot for your concern,
Pardon my english writing,
Greetings from France,
R.001
Not far from last week, I wanted to use my 388, turning it on, no sound in the L/R bus. I searched on forums to see if anyone already had this problem, and I came across the thread "New 388 problem". Turns out that the culprit was the MC14069 chip. I shotgun the chip, and the problem was solved. Amazing.
So now that this issue is fixed, last night I have planned to record a bit but I experienced a new issue:
The issue is : monitor 5 and monitor 8 are only fed by tape out 5 and tape out 8 respectively, even if nothing is assign to them.
1 - When MON pgm/cue is depressed (up) and no assign button is pressed: everything works correctly, I have sound via the Monitor section if I turn the mon gains up.
2 - When I press the assign LR button: Works fine, no sound as long as the faders are down. Channels 1 - 8 = works properly
3 - When MON pgm/cue is pressed (down): if nothing is routed to any MON bus, with faders all the way down: no sound through channel 1 to 4 and 6 and 7, but channel 5 and 8 are fed by tape out 5 and tape out 8. Beside this, everything works fine for the other channels.
I listened to the PGM OUTs at the back of the deck, when I assign something through PGM 5 and 8, everything works as it should.
When I try to send sound through PGM IN : I got nothing on PGM 5 and 8 as when I do it via the mixer.
I tried swiping the REC/PLAY PCB cards but the issue is fixed to channel 5 and 8.
Same with the DBX cards.
Maybe someone already experienced this, I really don’t know where the problem is, maybe it comes from the MC14069 chip again or somewhere there?
I don't know if i have good explanations skills so tell me if something is not clear...
For information : I have good soldering skills, I got an Oscilloscope and barely know how to use it, I’m learning how to troubleshoot etc…
Thanks a lot for your concern,
Pardon my english writing,
Greetings from France,
R.001