its +5v and -5v for the filament of the fip then
theres a -35v from psu for the anode and cathode suplly
via 2 display drivers 1 does the row 1 does the
colume the 1 display driver also does the push button switches and drives the
leds for those swithches via led drivers and logic
its the same design used in the eps
/eps16+/asr10/vfx-sd/and the ts10/12 until they did the purple lcd screen for
the asr88 and later asr10
----- Original Message -----From: tomlinson6050Sent: Tuesday, September 22, 2009 5:46 PMSubject: [Ensoniq-VFX-SD] Re: newbiei'm in Richmond KY. about 100 mi south of Cincinatti.
my thoughts on your VFX:
i don't think there is a -5 volt line: two +5s
there should be a 50-volt output from the power supply for the vacuum display.
when you open the front panel, there will be three connectors to the panel /display board: one on the left, two on the right. check them for corrosion.
thanks for the welcome
bill
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