Anyone know the correct voltage for the fan fitted to these? Just had one in with a new (??) fan hanging loose in it. Job ticket claims that the owners replaced the fan, and then it smoked ... I'm not sure what they had done, but they had twatted a set of o/p tr's on each board, and the smoke had come from one of the 0R22 emitter resistors, due to the 15A fuses that had been fitted ... :-(
Anyways, amps all repaired now, but their new fan, which is 24v, seems reluctant to start. Measuring quickly across it, shows just about exactly
12v. Haven't got full schematics that show the fan connection, so without pulling the board that the fan is connected to all back out to follow print around, I don't know if it is a 'controlled' fan, and there is something wrong with the controlling circuit, or whether it's right, and the fan doesn't actually start until the thing hots up a bit, or whether it should be a fixed 12v fan, and they've just got the wrong one.Funny isn't it. I repair loads of HK PA amps - Actors and Lucas's and these, and I've never noticed what voltage the fan is. But I'm pretty sure from memory, that they usually run at full chat all the time, as I'm also pretty sure that they normally start up at quite a low input voltage, when you are bringing a repaired one up on the variac.
So, anyone know for sure ?
Cheers
Arfa