1K Club - QQ Shooting Star
- Dec 6, 2010
- New Zealand . Waitakere
Thanks for pointing that out that this is not the full schematic, I`m not a techy person it was given to me so if anybody has the full schematic I would be interested in one my self.Unless I'm overlooking something (always a chance of that) all I see is parts placement diagram, not a schematic. Also there are 2 main PC boards in the D1000. Looking at from the back this is a diagram of the left side board. It's the other board that containing the power supply and of course other variomatrix stuff.
At the risk of stating the obvious & being foolish, you are using a 100V step down transformer for this, right? And did this work before or did you buy recently & just tried it? Does the power on light come or anything happen? Or is it completely dread?
There are no visible power fuses internally to check or replace. I say visible because there's a small PCB mounted on the side wall that handles input power & routing to/from power switch. It might be hidden on bottom side of that between the PCB and the plastic wall of the enclosure.
Older units like D-2 had just 1 power supply that was adjustable to 25V. In the D1000 there are multiple power supplies. By the big transformer you can see VR1, VR2 associated with Q2 & Q5 respectively. This supplies the +- bipolar 15V for the input, output and basically everything but the QS chips. There is another voltage regulator M IC1 that probably derives the 25V for the Sansui chips, no adjustment control. Proper volts for the Sansui chips are:
HA1327 Phase Discriminator 25V pin 11
HD3103 FET IC 22.5V pin 9
HA1328 Matrix IC 25V pin 8
Sorry I can't be of more help at this time.