Looking for this custom 40-pin chip to fix a neighbor's toy basketball
game.
The number printed on the chip is HK828B.

The small circuit board is enclosed in a 6'' round plastic box with a
2-digit 7-segment
display on the top left for score, and another 2-digit 7-segment
display on the top right
for the count-down timer.

Please email me directly, along with asking price, if you have such
exact chip,
or if you have the complete unit.

Thanks,
- Sylvain
email: pinball_sylvain a t r o g e r s d o t c o m

sg wrote:
Looking for this custom 40-pin chip to fix a neighbor's toy basketball
game.
The number printed on the chip is HK828B.

The small circuit board is enclosed in a 6'' round plastic box with a
2-digit 7-segment
display on the top left for score, and another 2-digit 7-segment
display on the top right
for the count-down timer.

Please email me directly, along with asking price, if you have such
exact chip,
or if you have the complete unit.

Thanks,
- Sylvain
email: pinball_sylvain a t r o g e r s d o t c o m



The fact that it's a custom chip likely means nobody will have one,
other than you might luck out and find a cosmetically damaged game you
can salvage one from. It's probably a custom programmed microcontroller,
if you know someone who's into electronics it's probably possible to
program a modern chip to emulate the one in the game but it would depend
on knowing exactly what the original is supposed to do.

How do you know the chip is bad anyway?

Still looking for that chip.

I am aware the chances of finding such a custom microcontroller chip
are remote.
However, posting here, we never know.

How do I know this chip is bad ? Very simple:
proper troubleshooting on my bench proved that other discrete
components around
the chip (+5V regulator, caps, resistors, diodes and transistors) are
all good.
Xtal/Clock runs properly on the chip (checked on scope). Supply is
fine.
I also checked that there is no AC ripple on the +5V. There are no cold
solder joints
nor broken traces. The only thing left really is this chip.
Before anyone asks, I do have proper instruments (DVM, ESR & cap
testers, scope, etc.).

Now, while it would be possible to reverse engineer that thing and
build something
to replace it using a microcontroller or processor/EPROM, it is
definitely not worth my time nor money to do this. It would be easier
to build something from scratch, using the
same rules as the current game. However, not worth my time since it is
only for a cheap
toy I am trying to revive for a neighbor, and I have many other
projects and limited time...

Cheers,
- Sylvain


The fact that it's a custom chip likely means nobody will have one,
other than you might luck out and find a cosmetically damaged game you
can salvage one from. It's probably a custom programmed microcontroller,
if you know someone who's into electronics it's probably possible to
program a modern chip to emulate the one in the game but it would depend
on knowing exactly what the original is supposed to do.

How do you know the chip is bad anyway?