Famicom AV Modification / Mod

[FM-77]

I just want to say that you do not normally need a transcoder or anything like that to use a Famicom (or any other NTSC system) on a modern PAL TV. Most  PAL TVs from 2000 or later support NTSC signals through composite, and will work just fine. The few exceptions are really small and/or cheap no-brand TVs. If your TV does not support NTSC through composite, it's time to buy a new one.

[133MHz]

Yeah. It is common for PAL TVs to support NTSC, but not common to see NTSC TVs with PAL support.

[JC]

I've never seen a NTSC that supports PAL, which would be cool because I would love to play Elite and the other European games that don't work right on NTSC.

[Arnold101]

low audio volume problem for this famicom mobo: fixed 

instead of use the green cable point, use two jack for audio, one on pin1 and one on pin2 of famicom cpu, now it sounds fantastic     (and it's stereo, in that mod is mono)

infact if you connect on a single jack pin1 and pin2 together it sounds again low

[133MHz]

Yeah, you shouldn't connect pin 1 & 2 on the CPU together directly without some kind of resistor in between, thats bad mmkay .

[Dr.Wily]

Little question about the Famicom AV modification in Workshop section.

In this article some capacitors are needed to build audio and video amp. But if you give the capacitors capacity, you forget the voltage. Which is the voltage needed for these capacitors ?

[133MHz]

You can probably get away with the lowest voltage ones since the Famicom is a low voltage device and they're not very critical.

Also, welcome to the forums! . There's an intro thread on the Off Topic Chat board so we get to know more about yourself and you get to know more about us .

[Dr.Wily]

Oh thank 

The lowest voltage that I found is 35v for 1µF and 10v for 47µF. Good or not good ? 

[133MHz]

Perfect.

[Dr.Wily]

OK, if I want add stereo sound with the FDS (FDS sound, taken from cartridge port). The stereo sound is compose of 2 channels. But, the Famicom carries the FDS sound through cartridge port, what it give 3 channels (pin 01 and 02 + FDS sound).

The FDS is in mono, and 2A03 is in pseudo stereo (2 pin for 2 channels).

How I can mix 1 mono source with 1 strereo source ?

[Scorp.ius]

hi!

there is written that the mod is for HVC-001

i have a HVC-002 console... thats no problem, is it?

[2A03]

hi!

there is written that the mod is for HVC-001

i have a HVC-002 console... thats no problem, is it?

HVC-002 is the Famicom power supply, not the console. Are you sure it's not HVC-001?

[Scorp.ius]

hmmm.. there is a sticker on the underside of the console...
but yes - in the plastic there is a HVC-001

so propably the sticker says: "use the power supply HVC-002 only" or somethin 

[2A03]

so propably the sticker says: "use the power supply HVC-002 only" or somethin 

Yes.

[Scorp.ius]

hi!

i have done the AV Mod now on my famicom...
unfortunately my TV shows black/white prictures. it cant display NTSC as it seems