Schematic needed for Nintendo 101. This is the top load version of the
original NES. The schematic may be the same for both, so would like to
obtain either.
Unit does not work, the 5 volt regulator gets very hot so seems to be a
short or low resistance somewhere.
It has a double sided board, and hard to trace the path from the regulator.

"oldfogie" wrote in message
...
Schematic needed for Nintendo 101. This is the top load version of the
original NES. The schematic may be the same for both, so would like to
obtain either.
Unit does not work, the 5 volt regulator gets very hot so seems to be a
short or low resistance somewhere.
It has a double sided board, and hard to trace the path from the
regulator.



Schematics are probably not available to anyone but an authorized service
center. 5v will go to the power pin of each IC, that's normally the
upper-left corner. Check for shorted capacitors, particularly if any
tantalum units are used, a schematic will not be very helpful, there's no
getting around having to remove parts and test them.

oldfogie wrote:
Schematic needed for Nintendo 101. This is the top load version of the
original NES. The schematic may be the same for both, so would like to
obtain either.
Unit does not work, the 5 volt regulator gets very hot so seems to be a
short or low resistance somewhere.
It has a double sided board, and hard to trace the path from the regulator.


Hey the

I don't know if this helps you or not, since this is for the original
NES, but a schematic can be purchased he

http://www.electronix.com/catalog/pr...roducts_id/701

I am assuming that these schematics are simply reverse-engineered, and I
cannot vouch for their quality. I have purchased other things (mostly
VCR and microwave parts) from this company, however, and I've not had
any trouble.

Just curious: what kind of symptoms are you having with the system?
Are you seeing a power indicator at all?

Hope it helps,
-Darrick

Quite a few people have made hardware and software emulators of the NES
line. I'm sure that there are schematics floating around somewhere. Try
the emulator community if you haven't found anything yet.

In the meantime, have you checked the cartridge socket for bent pins?

Thanks for replies, sorry I'm late getting back, been tied up on other
things.
Guess I'm going to have to forget about repairing this, with the double
sided board would just about HAVE to have one of the expensive soldering
stations such as Pace, that sucks the solder out after it's melted.
I'll probably just put it back on ebay and sell as is, maybe get some of the
money back I paid for it. I was taking a chance that it would be something
simple to fix, such as problems with the AC adapter, or the TV connection
adapter (forget proper name for it), but luck wasn't with me! I replaced the
5 volt reg. but no help.
"Darrick Burch" wrote in message
. ..
oldfogie wrote:
Schematic needed for Nintendo 101. This is the top load version of the
original NES. The schematic may be the same for both, so would like to
obtain either.
Unit does not work, the 5 volt regulator gets very hot so seems to be a
short or low resistance somewhere.
It has a double sided board, and hard to trace the path from the
regulator.


Hey the

I don't know if this helps you or not, since this is for the original
NES, but a schematic can be purchased he

http://www.electronix.com/catalog/pr...roducts_id/701

I am assuming that these schematics are simply reverse-engineered, and I
cannot vouch for their quality. I have purchased other things (mostly
VCR and microwave parts) from this company, however, and I've not had
any trouble.

Just curious: what kind of symptoms are you having with the system?
Are you seeing a power indicator at all?

Hope it helps,
-Darrick

oldfogie wrote:
Thanks for replies, sorry I'm late getting back, been tied up on other
things.
Guess I'm going to have to forget about repairing this, with the double
sided board would just about HAVE to have one of the expensive soldering
stations such as Pace, that sucks the solder out after it's melted.
I'll probably just put it back on ebay and sell as is, maybe get some of the
money back I paid for it. I was taking a chance that it would be something
simple to fix, such as problems with the AC adapter, or the TV connection
adapter (forget proper name for it), but luck wasn't with me! I replaced the
5 volt reg. but no help.

SMT soldering/desoldering doesn't necessarily have to be an expensive
proposition. If you have nothing to lose, consider CHIP-QUIK; I was
able to repair a surface-mounted CF socket on my digital camera with it.

Sorry to hear about your troubles, though. I understand that the
top-loading model NES is rather hard to come by, with a commensurately
higher resale value. I'm also told that the cartridge connector is by
far much more reliable than that of the original, front-loading model.

Good luck,
-Darrick

If you don't have an expensive desolderer, and you are removing a dead
ic, an easy and cheap way to remove old chips is to simply cut all of
the leads off. Then you can remove the package and take the leads out
one at a time. Then you can use a braid to remove the solder from all
of the through holes.