FAKE A/V !!!

[krzy]

To eliminate those vertical bars, try adding 100uF cap between +5V and GND (pin 1 & 31 of cartridge connector).
BTW. Could you send good quality photo of tom & bottom layer of the PCB with cartridge connector?

[FAMICOM_87]

Here are the pictures of the PCB , When I added 100mF cap between 30 an 31 pin here the hilarious resolute I triyed with 10uF and 100uF 1000uF same black lines with all of them  

EDIT:
my bad  I was touching the cap between 30 and 60 pin , not 1 and 31 !
the funny thing is that only pin 30 give my 5 volts , but pin 31 nothing, it even is not connected to the pin 30!
otherwise when  I connected cap between pin 30 and a ground picture was no changed mach , slightly reduced vertical lines 

http://romlaboratory.dbwbp.com/romlab/famconn.gif

[krzy]

Unfortunatelly i don't see anything because all neccesary tracks are hidden under blu capacitor in bottom layer. But there is place to solder PNP transistor (Q1) + one missing resitor that could help
Pin 31 is used to detect if external cartridge is present (when shorted to +5V) and thus deactivate internal game.

[FAMICOM_87]

Unfortunatelly i don't see anything because all neccesary tracks are hidden under blu capacitor in bottom layer. But there is place to solder PNP transistor (Q1) + one missing resitor that could help
Pin 31 is used to detect if external cartridge is present (when shorted to +5V) and thus deactivate internal game.

thanks here is another picture to see those traces
Strange thing is that pins 1 and 31 are together in clone before this, that I fixed color and modded to 60Hz have integrated games too.
Where to solder and what kind of  PNP I have to add and what resistor ?
EDIT: Oh I so the bridged 2 of 3 pins Q1 right? I see other missing R 7 and C 7,
What do you thing about J1 and J 2 I tried any combination between them for 60Hz mode but nothing
Oh again EDIT I so the missing R5 , so C7 and R7 are not impotent they are for the integrated games.


Post Merge: November 25, 2018, 03:32:40 am
I made some measurements and tracing the tracks 
how to solder the PNP transistor and R5 how many ohms ?
On the power A/V PCB video blue wire is going directly to the base of Transistor 945  think , the collector is 5V

[krzy]

Strange thing is that pins 1 and 31 are together in clone before this, that I fixed color and modded to 60Hz have integrated games too.

There at least four of ways that console can detect if external cartridge is present (and each clone can potentialy use diferent one). All of them consist of checking if those 2 pins are shorted  by the cartridge:
*1 or 16
* 30 or 31
* 45 or 46
* 48 or 49


--

1. Remove C6
2. Remove jumper at Q1
3. Install PNP transistor (like A733, BC557, BC327 - just check the proper sequence of legs):as shown below:


4. Those jumpers are for 50/60Hz VIDEO and 21/26MHz crystal switch. If they don't work, the console might don't have this feature.

[FAMICOM_87]

 
WoW massive improvement! thanks very mach!!!! 
See now and before!

So this is that kind of your 2 stage amplifier   
I am using 2N3906 p-n-p
Here is that peace of ""ART 

thanks man now I can play with this console


BTW the beach menu VER 1.2 here is the exactly that from my chilhood!
But my first clone from about 1994 back in a day was with  very good picture quality even from the RF (it was shielded) and no vertical lines at all, If I remember the PCB was even the same but with no missing elements 

[krzy]

What is the voltage between GND and each of those small solder-pads?

[FAMICOM_87]

What is the voltage between GND and each of those small solder-pads?

Nothing -  0V between J1 and GND J2 and GND and between J1 and J2

I found the next big problem - glitched sound!  
take a listen:

https://youtu.be/hWEiAm7Ehzo

P.S
I am so glad that my clone back in a day was with perfect sound and picture!!! 
If I had this peace of junk then, my childhood would be so miserable