Zonn said:
The slight modification is a jumper(s) on the monitor that routes the +/-
15v to some unsed pins on the 8 pin socket.
-- There is a PC layout drawing of the monitor board in the Star Castle board (should have thought of looking at the board layout and not just the schematic, duh..) There is a spot for an 8 pin OP Amp just to the left of the X DAC and it's wired up as a unity gain non-inverting amplifier. The one thing other than installing the part you have to do is install a jumper (or a resistor.. someone with a monitor with these parts populated would have to tell, it's coming off of pin 2 of the 8 pin DIP). I would guess the wire mod brought +/- 15 over to pins 7 and 4 of the OP Amp, respectively.Received on Mon Aug 11 10:28:33 1997
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