Author Topic: PC Engine GT - Controller Board (updated with external controller mod)  (Read 3811 times)

pipi

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Re: PC Engine GT - Controller Board (updated with external controller mod)
« Reply #45 on: November 21, 2022, 12:23:00 PM »
This is lovely work!

Allow me to ask a quesiton that can help me in troubleshooting my dead speaker...
Which are the speakers connections here?

I guess it is a mixdown of left and right because we have a mono speaker...
Which pin is + and which ping is -?

I think 12 should be - because I see continuity with ground
11 should be + but what is its route?

Thanks!

tawy

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Re: PC Engine GT - Controller Board (updated with external controller mod)
« Reply #46 on: November 22, 2022, 03:15:26 AM »
speakers on every handheld are not ground connected and there is no polarity, you can connected it to either side
it's pin 11 and 12 (the leftmost ones).
good luck.

pipi

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Re: PC Engine GT - Controller Board (updated with external controller mod)
« Reply #47 on: November 22, 2022, 09:27:07 AM »
Ok my mind is now blown :O

Do you happen to know which is the pinout for the 3.5mm speaker on the PCE GT?
I tried both an aliexpress 3.5mm female plug and a game gear one (with different pin numbers, strange) but both give me great earbud audio and zero speaker sound :/

tawy

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Re: PC Engine GT - Controller Board (updated with external controller mod)
« Reply #48 on: November 25, 2022, 05:08:17 AM »
the game gear jack connector is the good one. you have to check the 3 pins on the end of the connector and follow the traces :

when jack not connected, the middle pin is shorted to a pin and sound goes to the speaker
when jack IS connected, the middle pin is shorted to the other pin and sound goes to the jack earphone.

it works as a switch.