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Yes, they're all linked at the start of the thread, around page 3. I would be interested to know the build dates on yours, since they might not be the same. Most of mine are from '89 by the looks.

It just so happened that 500-series EPROMs were in a box and had the revision code written on them. If they were still in the machine, or didn't have the code written on them by whoever burned them before me, I'd have had no idea. Fortunately I have the MX80 EPROMs in the same box at the...

The V500 ROM is V500-26E.

Definitely clean that lot off. It takes surprisingly little gunk for the recording level to drop off. Hopefully that'll sort it!

The 'not recording but does play' thing can be due to the relays sticking on the channel card. Swapping cards and having the fault move would tend to indicate that. Audio routing issues can sometimes be caused by a hex inverter chip failing (U104?), this seems to be a common fault on the 388...

Most of the songs are composed in a sequencer and dumped to tape using a Phil Rees TS-1 synchronizer. That stuff goes directly to the 24-track. Things which require lots of punch-ins and retakes like bass, vocals and more complex tape effects such as reverse reverb, reverse drums, tape loops...

CODE TYPE and REF SRC go backwards and forwards through the manufacturers. The up and down buttons beneath the display allow you to select the model. As for the firmware images, I've got L410 on both units. Originally one of them had the 500 firmware, but it kept trying to start in video sync...

Just checking, are you positive it doesn't have TASC-60 support? IIRC you select TASC-40 and there's a modifier button to flick between the TASCAM models, (but I can't remember what). Mine are mostly acting as timecode displays and regenerators at this point so I don't configure them much anymore.

For now, they are still where I left them: http://it-he.org/temp/LYNX500.BIN http://it-he.org/temp/LYNXL410.BIN Both images include TASC-60 support.

Ah, good! I did wonder if it might be a cold solder joint, but that would definitely do it too. Glad you're back in business!

I think the 388 uses relays to switch what the head is doing, and these sometimes get stuck. Most of the TEAC decks from that era do this, I'd be surprised if the 388 was any different.

Good luck!

Yeah, if the starter board is fine, but one of the phases had lost a drive transistor, it would likely be operating at half-power - enough to keep it running, but not enough to start. In that scenario there would be a one-in-three chance of it trying to start on the weakened phase...

I think if the drive IC fails, the motor will stop spinning at all, since it's controlling the phases of the motor. I'd be inclined to suspect one of the drive transistors. Especially if this wasn't happening with the other capstan board. Interestingly, the manual shows an additional circuit...

Good luck!

Well, anything involving FM demodulation is beyond my level of electronics, but at a guess (which may be wrong) it's using the 5.5MHz combined with the tach pulse from the capstan motor to get a beat frequency which is the 300-2400Hz clock on TP2 (or in this case, 7.2KHz which should not be...

Minor clarification: you'll need to check for the tach pulse on TP2 while the machine is playing.

Look for TP2 on the capstan motor controller board. Hook it up to a 'scope and make sure you're getting a periodic waveform. Then hook it up to a frequency counter (good multimeters can do this). You should get a specific frequency, depending on the tape speed: 300Hz for 3.75, 600Hz for 7.5...

Hard to say. The motor controllers are pretty sophisticated on these machines, each one has a PROM chip containing a lookup table of field strengths for the field windings. That said, I've seen one of the reel motors go very slow when a capacitor has failed. The spooling motor board has a...

Last I heard, the heads were practically unobtainable (and they are specific to this machine) so the head condition is the major factor. We've also seen a few people here having the mixer outputs fail to switch properly, caused by one of the logic chips failing. That's less of a problem because...