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June 05, 2020, 02:46:03 AM

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Author Topic: Woodstock GX-55R SS Amp  (Read 1422 times)

argenta

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Woodstock GX-55R SS Amp
« on: April 30, 2020, 10:59:16 PM »
G'day all. I come from the South Coast of NSW. I repair all things electronically musical - guitar amps, pedals, sound desks, stereos and so on. So I have a Woodstock in the shop with no sound. Tests reveal the output MOSFET to speakers is kaput.
I haven't got any circuit diagrams or tech info to work off, so working without a net here...
What I am looking for is the specs for this 5 pin output MOSFET - yeah, no markings on the bad boy!
Really flying without instruments!
Any ideas?
Thanks  :tu:

Jazz P Bass

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Re: Woodstock GX-55R SS Amp
« Reply #1 on: May 01, 2020, 01:14:59 AM »
5 pin Mosfet???
Sanken made 5 pin darlington output transistors.
The one that comes to mind is SAP09.
There also was a 15.

dmeek

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Re: Woodstock GX-55R SS Amp
« Reply #2 on: May 01, 2020, 11:29:10 AM »
Please post photos of the circuit board, both sides.