Hi
I am looking to fix the output board from a micromega 3 with the drive 3 digital output board .
the cd player works fine just nothing on the output
I have removed the board and removed the large diode which is a 1N5349B which is a 12v 5w zenner this tests as shorted out
the 2 diodes are good the resistor between them is burnt but still measuring 25R
could it be just the zenner needs replacing or because it has gone short will that have damaged anything else .
I have tried to test the 5 voltage regs on the board by testing between pins with a diode test on my meter which bleeps so no shorts or it would be a continuous tone .
cant seem to find a schematic any where !
any help much appreciated
Glenn
20181124_143950 by glenn jarrett, on Flickr
20181124_144033 by glenn jarrett, on Flickr
20181124_144016 by glenn jarrett, on Flickr
I am looking to fix the output board from a micromega 3 with the drive 3 digital output board .
the cd player works fine just nothing on the output
I have removed the board and removed the large diode which is a 1N5349B which is a 12v 5w zenner this tests as shorted out
the 2 diodes are good the resistor between them is burnt but still measuring 25R
could it be just the zenner needs replacing or because it has gone short will that have damaged anything else .
I have tried to test the 5 voltage regs on the board by testing between pins with a diode test on my meter which bleeps so no shorts or it would be a continuous tone .
cant seem to find a schematic any where !
any help much appreciated
Glenn
20181124_143950 by glenn jarrett, on Flickr20181124_144033 by glenn jarrett, on Flickr20181124_144016 by glenn jarrett, on Flickr
All you can do it try replacing the Zener (and I would also replace the rectifiers as a matter of course). CPC seem to have a large stock.
You can even cobble a test rig up making a 'power zener' from a smaller wattage part and an NPN power transistor like a TIP41 or BD131. Just connect the Zener between collector and base.
The board appearance suggests this has possibly been a design issue as it looks like that whole area has run hot for a very considerable time.
You can even cobble a test rig up making a 'power zener' from a smaller wattage part and an NPN power transistor like a TIP41 or BD131. Just connect the Zener between collector and base.
The board appearance suggests this has possibly been a design issue as it looks like that whole area has run hot for a very considerable time.
Attachments
I haven't heard from the model "3" until now.
Maybe "DIVE 3" + T-DAC, or "STAGE 3" or TRIO CD3 ?
Freie Ton- und Bildwerkstatt: Micromega Stage 3
Micromega Stage3 Photo #912050 - US Audio Mart
√ Micromega Drive 3 Occasione Usato - Codice 159040
But no of the mentioned models uses Micromega's master clock unit (Ф/µΩ) from the images, which I will save here, because
Find your inspiration. | Flickr
will the images delete after a certain time.
If your exact model naming is known, maybe one of the members can upload the schematic
Maybe "DIVE 3" + T-DAC, or "STAGE 3" or TRIO CD3 ?
Freie Ton- und Bildwerkstatt: Micromega Stage 3
Micromega Stage3 Photo #912050 - US Audio Mart
√ Micromega Drive 3 Occasione Usato - Codice 159040
But no of the mentioned models uses Micromega's master clock unit (Ф/µΩ) from the images, which I will save here, because
Find your inspiration. | Flickr
will the images delete after a certain time.
If your exact model naming is known, maybe one of the members can upload the schematic
Attachments
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