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NEC TG-16/TE/TurboDuo => TG/PCE Repair/Mod Discussion => Topic started by: Ergot_Cholera on September 28, 2015, 06:43:59 AM

Title: PC Engine (original) no down direction on D-pad.
Post by: Ergot_Cholera on September 28, 2015, 06:43:59 AM

I just got a PC Engine and everything works fine apart from when the down direction is pressed on the controller it is unresponsive.
I know the problem is not the controller as it works fine with my other PC Engines.

Title: Re: PC Engine (original) no down direction on D-pad.
Post by: Keith Courage on September 28, 2015, 07:00:05 AM

Most likely it needs a good cleaning. Take a Q-tip, dip it in some rubbing alcohol, and then wipe off both the direction points on the controller board as well as the rubber pads that push onto them.

If that doesn't fix it then you have a bad connection somewhere.

Title: Re: PC Engine (original) no down direction on D-pad.
Post by: thesteve on September 28, 2015, 11:23:25 AM

if its just the direction, its in the pad, dir+button can be wiring or cpu

Title: Re: PC Engine (original) no down direction on D-pad.
Post by: SignOfZeta on September 28, 2015, 02:17:06 PM

Read his post, guys.

Title: Re: PC Engine (original) no down direction on D-pad.
Post by: Keith Courage on September 28, 2015, 02:45:32 PM

Quote from: SignOfZeta on September 28, 2015, 02:17:06 PM

Read his post, guys.

hah, oops. That's what happens when you've been working too much.

Anyways, first thing I would try is to re-solder the pins for the controller port inside your system. Usually that takes care of the problem.

Title: Re: PC Engine (original) no down direction on D-pad.
Post by: thesteve on September 28, 2015, 05:42:22 PM

are you sure it doesnt have a dead button as well (it should)
your right zeta, we skimmed

Title: Re: PC Engine (original) no down direction on D-pad.
Post by: staxx on September 28, 2015, 09:03:53 PM

Try another controller if possible, else you can use a multi meter and do a continuity test on the controller pins on the PC Engine and either trace lines or the solder points.

Title: Re: PC Engine (original) no down direction on D-pad.
Post by: Ergot_Cholera on September 30, 2015, 10:14:22 PM

The issue was a bad trace leading from those things (I won't pretend to know what they are) behind the controller port up to the vias near the RF unit. I just soldered a wire to reconnect them and I can now move down/crouch etc!

Title: Re: PC Engine (original) no down direction on D-pad.
Post by: thesteve on October 02, 2015, 07:49:35 AM

great
those things are noise filters

Title: Re: PC Engine (original) no down direction on D-pad.
Post by: Necromancer on October 02, 2015, 08:42:08 AM

Good job.  Another system back to OBEYing as Bonk intended!