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I've pulled the board out. Are there any tests I can do with a basic multimeter?

Well, there's no discernible sound coming through the headphones until the volume control is past 12 o'clock, so that's different to the other seven channels. What else might you be thinking of?

Update 2. I'm getting sound from the monitor submix for channel 2 with the monitor gain between 12 and 5, but it's considerably lower than when I switch channel 2 to the L-R buss (I can hear the TV through the mic in stereo mode but not in direct mode).

Am I going to need to send the board away to have the U109 chip replaced or is it a simple pull out/drop in job? U104 is fine. Just checking Yes, I/O channel 2 is passing signal to the L-R buss.

Input channel 2

Which chip controls routing signal from mixer channel 2 to the stereo buss? That's fine, so I guess it's not the same chip

If it is the IC how easy is it to get a replacement?

Update. After much wiggling there's sound coming from monitor submix 2, but it's still relatively weak compared to the other 7 monitor submixes and only with the volume pot all the way to the right

I've identified the connectors that connect the mixer channels to the monitor buss. I've given them a wiggle and even sprayed some contact cleaner on them, but no joy so far.

Oh yeah, I see what he, and you, mean now. I was having a brain fart

I don't think I'm following you. Can you go into more detail; like step by step? Thanks

Okay, I've got the base off. What's the next step?

Yeah, that's the conclusion I came to as well. I'll do it tomorrow. Note. My new avatar reflects the way I feel most of the time :D

Nope, I was wrong. Track 2 records. I just can't monitor it via the monitor submix. In either record or playback.

? Any ideas?

Mike has a 388, the Otari and the TEAC. The 388 runs at 7.5 IPS will no speed fluctuation issues. The Otari runs at 7.5 IPS (dual speed machine) with no issues. But the Otari at 15 IPS and the TEAC (15 IPS only) both have this weird slowing down by about one whole tone. With tapes recorded...

My friend Mike has an Otari 5050-8 and a TEAC 80-8 which are both experiencing this issue. Surely they can't both have developed exactly the same fault. Could it be a power issue?

Cheers

Link to Athan website? There's more than one meaning

Long time, no see. :D