Author Topic: need PC engine GT Q500 transistor replacement part??  (Read 498 times)

bdoi

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Re: need PC engine GT Q500 transistor replacement part??
« Reply #30 on: March 24, 2020, 06:56:52 AM »
Yep I also tried to switch controller board + speaker and it Worked fine on other GT , and another controller board +speaker on this one and same issue.

Keith Courage

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Re: need PC engine GT Q500 transistor replacement part??
« Reply #31 on: March 24, 2020, 09:50:14 PM »
Just fixed an express with this exact issue. The problem was a bad trace for one of the 33UF caps. Via hole connection was also bad. So I soldered an extra cap lead through the via hole, then used a wire to run the trace to the positive end of the 33uf cap.
« Last Edit: March 25, 2020, 03:39:53 AM by Keith Courage »

bdoi

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Re: need PC engine GT Q500 transistor replacement part??
« Reply #32 on: March 25, 2020, 03:14:38 AM »
Great ! Thanks Keith!
I will check more precisely 33uf caps tonight ;) and let you know

bdoi

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Re: need PC engine GT Q500 transistor replacement part??
« Reply #33 on: March 26, 2020, 03:10:42 AM »
Just fixed an express with this exact issue. The problem was a bad trace for one of the 33UF caps. Via hole connection was also bad. So I soldered an extra cap lead through the via hole, then used a wire to run the trace to the positive end of the 33uf cap.

I checked and indeed it was a bad trace through the pcb. I fixed it, the sound is now loud!
Many thanks Keith! 2 GT fixes in one thread!! :clap:

Necromancer

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Re: need PC engine GT Q500 transistor replacement part??
« Reply #34 on: March 26, 2020, 10:06:48 AM »
Nicely done, you guys.  That's some good teamwork!
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