Hi guys, my Shadow has worked well up until yesterday, on switch on I am getting random lights on the dot matrix, a humming from the speakers and no playfield illumination or anything else. Where do I start please I am stumped.
Pinball info
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Dead Shadow
- Thread starter Busterbulldog
- Start date
Reseat the short ribbon connector first.
Check the fuses, reseat the ribbon cables and check the batteries ain't leaking
OP
OP
No blown fuses and reseated all ribbon connectors but still the same.
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- Jul 21, 2011
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- Ive
Any sign of life at CPU? Diagnostic Leds on?
Sent from my C1905 using Tapatalk
Sent from my C1905 using Tapatalk
Push the CPU back in a bit? Big square chip in left rectangular board.
New batteries (it's not them but do it anyway).
New batteries (it's not them but do it anyway).
With the power off
Seriously?
Yes! I had a dodgy moment on TZ, fixed by turning it off - pushing the CPU in a bit (1mm), then powering on. Solved.
@RudeDogg1 , I think the guy died following my suggestion to test the voltages. @Monkeyboypaul is in the clear
Maybe he's not dead, just resting
the Shadow knows.
OP
OP
There are leds lighting up on the large board. I have checked the test voltages I have a 5v showing zero volts and a 50v showing 108v. The others are roughly as they should read. No blown fuses and have reseated all connections tried tapping bits etc.
The sun is shining
OP
OP
Cpu chip appears fully home....and its overcast and drizzly here. Oh and batteries replaced.
OP
OP
Does anyone have a link to some in depth testing I could study ? Which component provides the needed voltages ? Thanks for the input so far.
The missing 5v is the main reason the game doesn't work as that powers the CPU. The 50v should actually be somewhere around 75v, 108v is way high but I wouldn't worry too much about that until you have a stable 5v and get the game to boot. Theres loads of information available online about how to go about reparing this stuff:
http://pinwiki.com/wiki/index.php?title=Williams_WPC
http://techniek.flipperwinkel.nl/wpc/index2.htm#reset
Full schematics for the board set are available here: http://mirror2.ipdb.org/files/1000/...ed_II_WPC_Schematics_Revised_May_17_1993_.pdf
It could be something simple like poor ground (is the board securely screwed to the backplate?) or a dry joint. It sounds like the one of the bridge rectifiers or regulators has failed though. To be honest if you're not particularly confident about being able to make a decent repair yourself, you would be best advised to send it off to somebody who can like @lukewells rather than risk doing more damage than good!
http://pinwiki.com/wiki/index.php?title=Williams_WPC
http://techniek.flipperwinkel.nl/wpc/index2.htm#reset
Full schematics for the board set are available here: http://mirror2.ipdb.org/files/1000/...ed_II_WPC_Schematics_Revised_May_17_1993_.pdf
It could be something simple like poor ground (is the board securely screwed to the backplate?) or a dry joint. It sounds like the one of the bridge rectifiers or regulators has failed though. To be honest if you're not particularly confident about being able to make a decent repair yourself, you would be best advised to send it off to somebody who can like @lukewells rather than risk doing more damage than good!
@PinballDaze is not too far from you Stuart, I'm sure he would take a look at the board if you dropped it off to him.
OP
OP
I think your right guys .
OP
OP
Sorted found a loose overheated pin which knocked out the entire 5v circuit. Right hand side red and blue wires marked secondary. All working.....downside..well the wifes highest score is lost.....
Well done, sounds like a nice easy fix in the end then.
That connector marked secondary is where the various AC voltages from the secondary windings on the transformer come onto power driver board, hence the marking.
That connector marked secondary is where the various AC voltages from the secondary windings on the transformer come onto power driver board, hence the marking.
