(Topic ID: 257265)

Bally wrong display data (mpu related)

By Pk98

4 years ago


Topic Heartbeat

Topic Stats

  • 58 posts
  • 9 Pinsiders participating
  • Latest reply 3 months ago by Quench
  • Topic is favorited by 3 Pinsiders

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#2 4 years ago

If you say the displays are good, try replacing U20 (CD4502).
That is the chip which selects which display to show the data at the appropriate time.
It's only a 50 cent part....

#4 4 years ago

Check the 43V fuse.
Or the J4 connector on the MPU.
To board may just be missing the 43V to boot.

1 week later
#7 4 years ago

You said you did repinning...
Also A4J1?
Check for a short between J1-10 and J1-11.
Otherwise I'm out of ideas...
Maybe Quench can help.

3 years later
#37 4 months ago

I've found a few too....

5101_chips.jpg5101_chips.jpg
#38 4 months ago

I've found a few more that may interest you....

5101_chips_2.jpg5101_chips_2.jpg5101_chips_3.jpg5101_chips_3.jpg
#45 4 months ago
Quoted from Quench:

Cheers, where did you buy the remarked Philips 5101?

I do not remember buying them.
Mostly they are pulls because of the replacement with nvrams.
I think they came with a batch of parts buy.
I hardly need any 5101 chips.

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