Zero 88 micro 4

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   Just bought one of these off the bay. Tried it out, seemed to be working ok, ran for about 5 minutes then smoke arose!

Anyone have any experience of working on these units?

looking inside revealed a burnt resistor on one channel and a possible dodgey poly capacitor. If I replace these parts will all be well again or is it likely to have done more damage? Cheers

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GAZ. Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 16 January 2007 Location: Hertfordshire Status: Offline Points: 2428	Post Options Post Reply Quote GAZ. Report Post Thanks(0) Quote Reply Topic: Zero 88 micro 4 Posted: 10 February 2010 at 7:21pm
	Just bought one of these off the bay. Tried it out, seemed to be working ok, ran for about 5 minutes then smoke arose! Anyone have any experience of working on these units? looking inside revealed a burnt resistor on one channel and a possible dodgey poly capacitor. If I replace these parts will all be well again or is it likely to have done more damage? Cheers
	100% Earth Moving Bass

djeddie Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 26 April 2004 Location: Bristol Status: Offline Points: 4125	Post Options Post Reply Quote djeddie Report Post Thanks(0) Quote Reply Posted: 10 February 2010 at 10:55pm
	Last time I repaired one of those was 1990! Anyway IIRC, one of the triacs had blown, taking a few other components and bits of the pcb tracks with it... Can't be more help than that sorry.
	Chas n Dave : it's like Drum and Bass but with beards. E=mc² ±3dB

GAZ. Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 16 January 2007 Location: Hertfordshire Status: Offline Points: 2428	Post Options Post Reply Quote GAZ. Report Post Thanks(0) Quote Reply Posted: 11 February 2010 at 12:58am
	Yeah its old! Theres a date on one of the test stickers inside from 1985 I think it was! The resistor which has burnt up is on the power board by the chokes. Next to it is the poly capacitor which seems to have cracked. I had an old mode electronics dimmer do a similar thing a while back. Possibly because the capacitors are old? I think the triacs are ok, I only had 2 channels connected to lights to test and it was still working when the smoke came out. I switched it off quick so hopefully I have limited the damage.
	100% Earth Moving Bass