Re: black widow pcb problem no play no picture clock working

  Ok I did all that and it got the CPU and the address buffers working.
The VROM1 is stuck high but the others are pulsing. VRAM is pulsing.
The X output is stuck high and the Y ouput is stuck low. I also noticed
that C11 (MC1495L) of the X output circuit is very hot. Theres about 8
vdc running through the x output so that could be why. And I checked the
6.8 vdc and there is no reading. There was before I messed with the
reset circuit.
Z output was stuck high and the R-G-B outputs were stuck high too. Put
then the HALT started pulsing causing the Z ouput and R-G-B outputs to
pulse too. The probe shows them pulsing at a high state.

Daniel Piraino wrote:

> Thanks, Peter Im going to give that a try today.
>
> Dan Piraino
>
> peter jones wrote:
>
>>-----Original Message-----
>>From: Daniel Piraino <dpiraino@twcny.rr.com>
>>To: vectorlist@vectorlist.org
>>Date: Sat, 06 Aug 2005 22:50:04 -0400
>>Subject: Re: VECTOR: black widow pcb problem no play no picture clock working
>>
>>
>>
>>> Sounds good just one stupid question. How do I reset the system with
>>>the reset pins?. Are you talking about the pins in the dash lined box?
>>>Thanks,
>>>
>>>
>>
>>i'm not looking at the schematics now, but i think thats them.
>>one is going to ground, the other goes to pin3 of F7 and to the diode etc.
>>
>>touch them together for a second to do a reset.
>>
>>though you probably wont have to because the watchdog timer should trigger a reset for you after a second or so.
>>
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>>
>>

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Received on Sun Aug 7 21:22:59 2005