Technical and Repair Assistance

[ericj]

Try varying the 75Ω resistor's value. If the picutre is too white try increasing it a bit.

Just tried a 100ohm resistor and the picture is perfect.  Thanks for your help! 

I'll be sending this back to Ruthenium on Monday. Make that Tuesday, since Monday is a federal holiday and the post office is closed.

[MS-DOS4]

Just one more quick question, I think my original famicom AC adaptor is broken, so I bought this one off ebay.


This one takes in American 120 Volts and converts to the needed 10 V DC.




This is okay, right?

[133MHz]

It is, as long as you mate the "tip" side with the "-" side on the end that goes into the Famicom.

[ericj]

I have that exact same AC adaptor for my Famicom. Works beautifully! 

[ericj]

Hello,
I've recently got the old Famicom off of Ebay, and apparently, there wasn't an AC adapter in the box. The seller told me it was FedEx's fault, but I'm not sure. Anyways, the AC adapter I've been using for my NES outputs the following:
9VDC
1200mA
Center polarity Negative
Will it work for the famicom too?

I think this may have caused the problem with your Famicom. The NES AC adaptor outputs AC, not DC. I had to replace the 7805 voltage regulator to get your Famicom to power up. Surprisingly, the capacitor was undamaged.

You may want to pick up a new AC adapter. Here's the universal one I use on mine, and it's only $10 with shipping:

http://cgi.ebay.com/Radio-Shack-Cat-No-273-1614-AC-Adapter-10V-850mA_W0QQitemZ370260362359QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item56353cc477

[Ruthenium]

The AC adapter I was using was not the Official NES adapter, it was some other generic one that outputs a DC voltage. Here's a picture of the label:

Sorry about the quality, my camera didn't want to cooperate.

[MS-DOS4]

That should work. At least there's no risk of frying.

[ericj]

Maybe the voltage regulator was bad when you got it. Did you ever get it to work at all?

[b1aCkDeA7h]

Just got a cheap untested HK Famicom ( HVC-001HKG ) with no AC adapter.  Now, I know the specs from the database say the adapter runs off of this:

MODEL HVC-002 HKG
AC200V 50Hz 17W
DC10V 850mA
+ ------ C------- -

So, what adapter would I need to be able to power on and test the system (in the US)?

[Ruthenium]

I haven't gotten it to work at all since I got it.
I'm not sure what might have caused the problem though.

[MS-DOS4]

Just got a cheap untested HK Famicom ( HVC-001HKG ) with no AC adapter.  Now, I know the specs from the database say the adapter runs off of this:

MODEL HVC-002 HKG
AC200V 50Hz 17W
DC10V 850mA
+ ------ C------- -

So, what adapter would I need to be able to power on and test the system (in the US)?

Was that thing a pirate? I'm not aware of Nintendo making a "Hong Kong" version of the famicom.

[ericj]

Was that the one on ebay for $49 BIN or Best Offer?

This one:
http://cgi.ebay.com/Nintendo-Red-Famicom-Hong-Kong-Game-Console_W0QQitemZ310172908230QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item4837befac6

[MS-DOS4]

That's the one I was thinking about.

[b1aCkDeA7h]

Dunno, but yeah, that's the one I just snagged.

I figured it was legit based on the database page that says:

" Note that Nintendo officially released Famicom products in Hong Kong. The codes on those products were the same but with "HKG" added to the end of each code (such as HVC-001HKG). Also note that not all of Nintendo's codes began with "HVC." For anything related to the Disk System, almost all of the codes began with "FMC." "

The model number matches up, if nothing else. It was cheap, so why not? I just don't want to fry it when I test it.

[DDCecil]

I hope posting this here is okay, as I see lots of info on systems, but nothing on cart games.

Here's my problem (random freezing):

http://www.youtube.com/watch?v=Vp-zxV_lgmc

The game used to work great, but now it seems to only freeze when you shoot a projectile or an enemy is about to enter the screen. I've tried the game on both my U.S. NES front and top loader via Gyromite adapter and it has the same problem. I've used rubbing alcohol to clean it, and all my other fami games work just fine. Any ideas?