[sdiy] restoring an sh1000

[Fredrik Carlqvist]

>The other thing i noticed is the transformer seems to be wired into the
copper coils....is this normal? or has it maybe been modified? 

I don't understand this, could you please clarify? Is something wired into
the transformer windings? Where does it's leads go? The transformer should
have seven wires coming out of it.

There is a neon lamp connected parallel to the primary side via two 100k
resistors, but no signs of PTC's or NTC's mounted inside the windings.

The transformer has connections for 100V(blue) and 120V(green) or
230V(brown) and 250V(red) on the primary side. The other primary connector
is white. The primary side fuse should be 0.5Amps. The secondary windings
(red, black, gray, and yellow) go directly to the power regulator located on
the "PL-1" card (the large PCB with two TO-3 power transistors) to pins 56,
55, 54, and 53 respectively. 

All PCBs has names (PL-1, FL-4, VCF-1, VCO-1, AR-1), and all pins are
numbered. If you have unpopulated contacts, I can check for you where they
should go.

Hope this helps,

Fredrik C



-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of Brett Maddaford
Sent: den 12 april 2005 03:09
To: DIY
Subject: [sdiy] restoring an sh1000

Hi All
 
I picked up a damaged sh1000 a while ago for really good price and by luck
the other day got a new timber case for it so cosmetically its looking good.
Unfortunately when it was damaged the transformer ripped loose inside and i
cant see where to mount it is the first thing also it damaged wires
connected to the fuse at the rear (round plastic thingy with solder tabs) so
there are some free wires floating around. Apart form that the two 4 pin
connectors that run from the pcb under the front panel to the right side of
the pcb in the bottom of the case have come off and im not sure which one
connects where. if anyone has any idea of which one goes where and where the
transformer should be mounted and what wires connect where to the fuse id be
really appreciative if you could let me know or if you have a wiring diagram
forward it on or let me know where i can look at it.
 
The other thing i noticed is the transformer seems to be wired into the
copper coils....is this normal? or has it maybe been modified?
 
Thanks
Brett