PCEngineFans.com - The PC Engine and TurboGrafx-16 Community Forum

NEC TG-16/TE/TurboDuo => TG/PCE Repair/Mod Discussion => Topic started by: pixeljunkie on October 11, 2014, 04:29:06 AM

Title: Super CDRom2 with GamedoctorHK AC adapter prob
Post by: pixeljunkie on October 11, 2014, 04:29:06 AM

I'm using the aftermarket AC adapter in an attempt to be safer on the PCE with my crazy american voltage.

Only problem is, if I am using the aftermarket version i get a pretty bad hum on the speakers that is not present when I use the original AC adapter.

What's going on?

Title: Re: Super CDRom2 with GamedoctorHK AC adapter prob
Post by: MrFulci on October 11, 2014, 04:36:09 AM

I use a voltage convertor, on my Duo-R. If you need further info, after searching for a step down voltage convertor, I can dig out my invoice.

Title: Re: Super CDRom2 with GamedoctorHK AC adapter prob
Post by: pixeljunkie on October 11, 2014, 04:45:07 AM

yeah, I am familiar with step-down converters. I used to have one years ago. It broke down for no reason after about 6 months use. So, I turned to after-market AC adapters which seem to be a much easier, less cumbersome and affordable solution to the problem.

My problem is the one I am using is EXTREMELY common in terms of what I am using it for. I'm just curious if anyone else has the "humming" prob? Or what is causing it?

Title: Re: Super CDRom2 with GamedoctorHK AC adapter prob
Post by: MrFulci on October 11, 2014, 04:55:57 AM

I use a box, for my Duo-R. I have no issue. So, no help here. My Duo-R loves my S-video switch box and receiver(s), and HDTV,

,

Title: Re: Super CDRom2 with GamedoctorHK AC adapter prob
Post by: schweaty on October 11, 2014, 10:19:31 PM

mine shit itself recently as well.  im going to try a linear replacement and a switched-mode one and i will report the results

Title: Re: Super CDRom2 with GamedoctorHK AC adapter prob
Post by: Keith Courage on October 11, 2014, 11:35:50 PM

Are you by chance using a generic AV cable? I've noticed that cheap AV cables produce hum when accompanied by a generic AC Adapter. Replace one or the other with a better one and the problem will go away.