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Diopter_Doctor
Joined: 24 Sep 2019
Posts: 36
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| Posted: Wed Nov 11, 2020 4:27 pm Post subject: |
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| gjaky wrote: | | The STK392-220 chips are traditionally running re hot, hence they often fail. Isn't a blown fuse or power resistor there on the DC board? |
I'll look and see. I just replaced the STK's with new old stock official Sanyo.
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Diopter_Doctor
Joined: 24 Sep 2019
Posts: 36
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| Posted: Tue Nov 17, 2020 2:24 pm Post subject: |
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So I don't see a fuse, and all the resistors check out to spec.
I notice that the test points are all at the bottom of the board, which is unreachable when plugged into the projector. How am I suppose to get to them with my o.scope?
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Tue Nov 17, 2020 3:53 pm Post subject: |
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| Diopter_Doctor wrote: | So I don't see a fuse, and all the resistors check out to spec.
I notice that the test points are all at the bottom of the board, which is unreachable when plugged into the projector. How am I suppose to get to them with my o.scope? |
Try to extend the test points with a piece of wire, but be careful to not make any sorts with the free wire ends...
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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