Re: VECTOR: Cinematronics Monitor Troubleshooting

I've seen that problem happen when you put the ribbon cable on backwards.
:)  So it's always good to start with that.

Replace IC 7, which is the 7406 chip on the right hand side.  It's part of
the intensity circuit.  When it goes out you'll generally get a blank
display.  You can check for pulses on  pins 1 and 3 with a logic probe, but
a 7406 is so cheap and easy to find you might as well replace it to prevent
future problems.

You might want to go to page 44 in this PDF file and read more
http://www.arcadehelp.com/spies/schematics/cineEx/exorcisor.pdf

Matt


----- Original Message ----- 
From: "Jim Crismale" <[email protected]>
To: <[email protected]>
Sent: Monday, March 07, 2005 6:03 AM
Subject: VECTOR: Cinematronics Monitor Troubleshooting


>
> Just picked up a pretty decent Star Castle. Game plays blind.
>
> Deflection chatter heard, hv fine. Screen is dark until I turn up
brightness
> and the entire screen gets lighter, no vectors being drawn.
>
> When the power is turned on, the heater glows brightly, then dims. Sound
> like a bad tube? My first reaction was start on the intensity circuit, but
> seeing the heater glow brightly and then dim seemed strange.
>
> Thanks,
>
> Jim
> http://www.arcaderehab.com
>
> --------------------------------------------------------------------------
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