Bad Sync on NTSC games

[ZXPortugal]

Hi! I own a Jap RGB capable N64, whitch i have a bortis RGB amp installed. Before the Ultra Pif was installed, everything was working ok. Now with the Ultra Pif i have the following issues:

Menu boots fine with PAL settings and all is ok, PAL games works like charm. When select NTSC for the menu or NTSC game, i cant get sync.

Thanks.

[jago85]

I think your FSEL signal is somehow tied to GND. Can you check this? The problem might be in one of the connectors as this signal goes between two GND connections.

[ZXPortugal]

Hi. I have checked and have 2 readings.

I have tested the FSEL to see if gives me GND signal. With the Ultra Pif removed, i have no ground signal betwen FSEL and GND (used the pin 2 of the MX8330) but with the interface mounted i have a small reading on the multímeter continuity between FSEL and GND

Thanks in advance

Obter Outlook para Androidhttps://aka.ms/AAb9ysg

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From: Jan Goldacker @.> Sent: Wednesday, January 5, 2022 6:55:21 PM To: jago85/UltraPIF_Hardware @.> Cc: ZXPortugal @.>; Author @.> Subject: Re: [jago85/UltraPIF_Hardware] Bad Sync on NTSC games (Issue #3)

I think your FSEL signal is somehow tight to GND. Can you check this? The problem might be in one of the connectors as this signal goes between two GND connections.

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[jago85]

So, it looks as there is a short on the Interface board. You can verify this by removing the board and then measure continuity from U1 pin 6 to GND.

Maybe there is a solder bridge here:

I think you have 3 options:

1. Find and remove the short by yourself
2. Ask your seller for a replacement
3. Use the alternative (not yet documented) installation method that does not require FSEL.
   • close JP1 on the Interface
   • directly connect XTAL to VCLK
     • Lift and isolate pin 1 of the MX8330
     • Then connect XTAL to the VCLK pad on the motherboard
     • Pin 1 stays unconnected

[ZXPortugal]

Hi!

Have have checked for any bridges and found none. So i tested the alternative method.

Shorted JP1, lifted PIN 1 of the mx8330, solder the Wire from XTAL to VCLK of NUS IC, and have sucess!!

Now NTSC is working and PAL! Thanks

![Uploading IMG_20220106_155955.jpg…]()

[jago85]

Hi! Great news! I still wonder why FSEL doesn't work. If it's not a short, maybe there's a problem with the contact or a dead pin. Anyway, I'm glad it's working now.