Good day folks,
Anyone got schematics or similar for these old school amplifiers?
The chassis is written Zeus, on the pcb it’s silk screened Zeus/mars.
I got this in, I haven’t torn into it as yet, but looking at the unit, it has alot of NTE parts. And a lot of “additional parts,” I’m not sure if these were factory add ons or it was modded at some point in its life.
One power transformer is burnt, seems like it took out the pre amp and power supply FETs with it. The secondaries on the transformers appear to be connected in series.
Anyone got schematics or similar for these old school amplifiers?
The chassis is written Zeus, on the pcb it’s silk screened Zeus/mars.
I got this in, I haven’t torn into it as yet, but looking at the unit, it has alot of NTE parts. And a lot of “additional parts,” I’m not sure if these were factory add ons or it was modded at some point in its life.
One power transformer is burnt, seems like it took out the pre amp and power supply FETs with it. The secondaries on the transformers appear to be connected in series.
Attachments
I don't know if these had the problem but I'd start with pulling the primary filter caps to see if there is any sign of electrolyte leakage.
Are the extra parts on the PS driver IC connected on both ends or are they only connected on one end?
Are the extra parts on the PS driver IC connected on both ends or are they only connected on one end?
There are a couple other “additions” throughout the amplifier.
The cap and resistor connected on the PS driver chip; the cap is connected to pin 11, the resistor to pin 16, the other ends of the cap and resistor are soldered together and to the resistor below (in the pic above).
I’ll verify where these are connected to when I get it out the heat sink.
I’ve attached a few more pics.
The cap and resistor connected on the PS driver chip; the cap is connected to pin 11, the resistor to pin 16, the other ends of the cap and resistor are soldered together and to the resistor below (in the pic above).
I’ll verify where these are connected to when I get it out the heat sink.
I’ve attached a few more pics.
