Patches and discussion for Ensoniq VFX family

Thanks Jamie!,

I will check this out and see what I can find.
I appreciate your help!

Gary


From: Ensoniq-VFX-SD@yahoogroups.com [mailto:Ensoniq-VFX-SD@yahoogroups.com] On Behalf Of jammie
Sent: Wednesday, September 23, 2009 5:14 AM
To: Ensoniq-VFX-SD@yahoogroups.com
Subject: Re: [Ensoniq-VFX-SD] Re: newbie


thers no +50

the biggest voltage is a 38vac which goeos into a bridge rectifier circuit which is tied at c.t to give 19v 0v -19v ac

then the 38vac goes to a rectifier that makes it vdc38 then it goes through an inverter circuit comprising of 2 transistors the c.t of the filament supply 5.5 vac being 0v also goes to this inverter circuit  the output leg has -35 volts coming from it pin 3 on the psu connector for the keypad and disply header it will have this written on the psu

the other header comes from the mainboard and has display written on it
----- Original Message -----
From: Jon Carroll<mailto:joncarroll@...>
To: Ensoniq-VFX-SD@yahoogroups.com<mailto:Ensoniq-VFX-SD@yahoogroups.com>
Sent: Tuesday, September 22, 2009 10:19 PM
Subject: Re: [Ensoniq-VFX-SD] Re: newbie



Looking at the power supply schematics, i dont see a +35... i see a +50...

----- Original Message -----
From: "Gary Brumm" <gabru@...<mailto:gabru@comsec.net>>
To: <Ensoniq-VFX-SD@yahoogroups.com<mailto:Ensoniq-VFX-SD@yahoogroups.com>>
Sent: Tuesday, September 22, 2009 1:44 PM
Subject: RE: [Ensoniq-VFX-SD] Re: newbie

Hi Jamie,

I do not remember a -35 from the PS....I will check. Sometime the display
lights up all segments and sometimes it is blank....the buttons
are non-responsive for the most part...seems different every time I start it
up. It also came with a Cesium Sound ROM Cart.

Thanks,

Gary

From: Ensoniq-VFX-SD@yahoogroups.com<mailto:Ensoniq-VFX-SD%40yahoogroups.com> [mailto:Ensoniq-VFX-SD@yahoogroups.com<mailto:Ensoniq-VFX-SD%40yahoogroups.com>]
On Behalf Of jammie
Sent: Tuesday, September 22, 2009 10:12 AM
To: Ensoniq-VFX-SD@yahoogroups.com<mailto:Ensoniq-VFX-SD%40yahoogroups.com>
Subject: Re: [Ensoniq-VFX-SD] Re: newbie

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: tomlinson6050<mailto:tomlinson6050@...<mailto:tomlinson6050%40roadrunner.com>>
To: Ensoniq-VFX-SD@yahoogroups.com<mailto:Ensoniq-VFX-SD%40yahoogroups.com><mailto:Ensoniq-VFX-SD@yahoogroups.com<mailto:Ensoniq-VFX-SD%40yahoogroups.com>>
Sent: Tuesday, September 22, 2009 5:46 PM
Subject: [Ensoniq-VFX-SD] Re: newbie

i'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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05:51:00

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No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.409 / Virus Database: 270.13.112/2389 - Release Date: 09/22/09 17:54:00