Hello everyone is the subject says I have a new to me Motorola r-2001b.? It came with the cover and all the accessories except for the CRT sun shield.? CRT is in good shape. I was looking at the unit when I purchased it and it had a image on the CRT that followed when pressing different functions.??
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When I got it home and turned it on of course it did nothing.? ?Horizontal sweep was extremely pinched almost down to a vertical line, almost.? Sometimes the monitor will boot other times it does a partial Boot and sits there and screams with a single tone.??
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I do see some suspect capacitors that look like they have corrosion underneath the translucent shrink wrap.? From the manufacturer codes it looks like this one was made sometime in 1982.? It's a good clean shape.? I am suspecting power supply issues to start. The capacitors in question are on the power supply modules. The two large computer type capacitors show no signs of corrosion or leakage.??
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I will be getting the LCR meter out and measuring the capacitance and ESR of those large computer capacitors.? ?And I will also be replacing the suspect ones.? Other than not pushing the test probe too far down into test point 201, is there anything else to look at that is a common failure point? When the CRT did have an image it had a ripple wave in the screen in the horizontal plane moving slowly up the screen.??
Any experts out here on this old dog???
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Thanks,
Randy.
randy.ab9go@...
Randy.AB9GO