So, I was given a very nice Akai 202D-SS reel-to-reel deck. Mechanically it's awesome - even has the smoked plastic reel cover intact! Transport works flawlessly, heads in great condition.
Electronically, time has taken a toll. Left Front channel and both Rear channels output great audio. Right front channel does not. It exhibits the following symptoms:
Above is the Playback Amp block from the repair manual. I see three power transistors and several caps that could be culprits here. So my question is: does this sound like one or more of the caps has failed, or is it one of the transistors that can make enough current to power up initially, then craps out? The fact that the diagram shows the meter reading directly off of the playback amp channel and not off the final amp output channel leads me to believe that the problem is located on this board.
Anyone here familiar with this machine or with this symptom enough to advise me where to start? I know, I should "take it somewhere"... but times are tough and I'm a good disassembler/solderer, so if I can fix it myself, I'd prefer it.
Thanks!
Electronically, time has taken a toll. Left Front channel and both Rear channels output great audio. Right front channel does not. It exhibits the following symptoms:
- Gives a power-on "thump" like all the other channels, but then...
- Within about 10 seconds of power-on, static is heard in channel and...
- Audio fades out and disappears rapidly, and...
- Channel meter shows all of this activity.
Above is the Playback Amp block from the repair manual. I see three power transistors and several caps that could be culprits here. So my question is: does this sound like one or more of the caps has failed, or is it one of the transistors that can make enough current to power up initially, then craps out? The fact that the diagram shows the meter reading directly off of the playback amp channel and not off the final amp output channel leads me to believe that the problem is located on this board.
Anyone here familiar with this machine or with this symptom enough to advise me where to start? I know, I should "take it somewhere"... but times are tough and I'm a good disassembler/solderer, so if I can fix it myself, I'd prefer it.
Thanks!