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K200 Repair PC203 Board Issue [message #28138]

Wed, 24 March 2021 23:39

g2s
Messages: 4
Registered: March 2021

Junior Member

Hey all,

I have a K200-B1 that I'm on the home stretch of repairing.

It has low output when plugged into the 'Boost' channel that runs through the PC203 board.

Everything is working up until Q203. I have replaced Q203 with a 2N4401.

Plenty of signal at the base, low signal at collector. Voltages are B: 2.4VDC C: -0.55VDC E:GND.

The schematic shows the Base voltage should be +6V. Is that right? Possible mis-print? I can only see how it is connected indirectly to the negative rail, so how can it have a positive voltage?

Not sure what else to check here. Here is the schematic: shorturl.at/xLUV8

Any suggestions are appreciated! A lot of great info on this forum I am continuing to read through it now.

Thanks in advance.

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[Message index]

		K200 Repair PC203 Board Issue By: g2s on Wed, 24 March 2021 23:39
		Re: K200 Repair PC203 Board Issue By: stevem on Thu, 25 March 2021 05:54
		Re: K200 Repair PC203 Board Issue By: g2s on Thu, 25 March 2021 10:12
		Re: K200 Repair PC203 Board Issue By: stevem on Thu, 25 March 2021 11:44
		Re: K200 Repair PC203 Board Issue By: g2s on Thu, 25 March 2021 12:28
		Re: K200 Repair PC203 Board Issue By: chicagobill on Thu, 25 March 2021 13:32
		Re: K200 Repair PC203 Board Issue By: g2s on Thu, 25 March 2021 15:16
		Re: K200 Repair PC203 Board Issue By: stevem on Fri, 26 March 2021 16:22

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