Re: Messed up my Black Widow

When you say no +5 are you saying there is no +5 voltage measured at the
board test points or that the power led is not lit?

#1 I would recommend taking a few minutes and giving the board a good
visual inspection.
- Is there a cap or potentiometer that has been mashed down and shorting
on another component?
- Is the crystal and leads intact?
- Do you see any cracked components or other damage?

#2 Measure resistance across the +5 and GND test points next to the
power LED with the board disconnected
- I measured 1.575 K Ohms and 1.578 K Ohms on a second board so they
seem to be fairly consistent

#3 If you have an eprom programmer verify both sets of roms/eproms

#4 If you have an oscilloscope, logic probe or frequency counter you can
place on pin #40 of the 6502 CPU to watch for an active low reset

On 7/1/2012 3:08 PM, John Huie wrote:
> Well the boards are both out of the game right now but when they were
> in I checked all fuses and made sure the interlock was on. I could
> swap out the other board and get life.
>
> --- On *Sun, 7/1/12, vectorlist-steve
> /<vectorlist@arcadehacking.com>/* wrote:
>
>
> From: vectorlist-steve <vectorlist@arcadehacking.com>
> Subject: Re: VECTOR: Messed up my Black Widow
> To: vectorlist@vectorlist.org
> Date: Sunday, July 1, 2012, 2:55 PM
>
> Interlock safety switches on the back door and front coin door in
> the service mode position? ( Pulled all the way out )
>
> If not that, how about a blow fuse? Nine out of ten times it's
> the simple things that folks stumble on.
>
>
>
> On 7/1/2012 2:50 PM, John Huie wrote:
>> Thanks for all the tips guys. I think I tried everything you
>> have suggested so far. Here's the breakdown:
>>
>> 1) Inspected all chips. There are no bent or broken legs. All
>> came out nice and straight.
>>
>> 2) No obviously damaged sockets. I examined every pin of every
>> socket visually with a magnifier top and bottom. They all appear
>> clean and have clean solder on the bottom.
>>
>> 3) Can't see any damage to traces under the chips that could be
>> leading to a short. Examined each with a magnifier also.
>>
>> 4) All roms were put in the correct way around.
>>
>> 5) When I checked the resistance between Ground and +5, I was
>> just using the "Diode" setting on my meter. With chips in or
>> out. On the board in question I'm getting an immediate beep and
>> the reading is 0.000. On the other board I get no beep and it
>> reads 0.291 resistance. Whatever that means.
>>
>> 6) Neither board is plugged into the harness when I'm checking this.
>>
>> 7) Thanks for the chart Jordan. Now I see where I screwed up.
>> Step one!
>>
>> Any other ideas? Oh and David, if you can hit me up privately
>> and let me know what you charge to repair these that would be
>> great. I've got two that could use repair.
>>
>> John
>>
>
>

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Received on Sun Jul 1 18:27:57 2012