Quantcast Panasonic AG-7750 problem, no power up? - digitalFAQ Forum
  #1  
01-12-2018, 04:35 PM
josje22 josje22 is offline
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Hi there,

I'm in the middle of a conservation job and this thing happened with my 7750:
I finished digitizing the tape and rewinded it and ejected it. Took the tape out but there was some tape hanging out of the cassette (not broken). Then the machine was powered of. When I switch it ON the drum starts rotating, the front display light up for a second, and then nothing. dead!

First I thought about a bad cap in the power supply unit, but then I read about this (solved) topic:

"JVC HR-S7600AM keeps shutting down after 3 seconds ?"

At this topic you talked about a mechanic failure, or faulty shutdown/power off. Then at power up the machine, the selftest fails and refuses the vcr to start up.

This could be exactly the same problem I have with the 7750.

Is there any knowledge at this great forum to solve my problem?

thanks in advance,

Oskar van den Belt
Amsterdam
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  #2  
01-15-2018, 08:03 AM
josje22 josje22 is offline
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Hi there again,

Is there really no experience or eureka memory about how to possibly solve this problem?

thanks in advance,

Oskar
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  #3  
01-15-2018, 09:47 AM
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jwillis84 jwillis84 is online now
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I'm no VCR repair specialist

However [shutdowns] are usually the result of some kind of belt or mode switch problem.

The belts are made of rubber and naturally wear out. When they are too old they can't provide enough torque to finish their job, and the microprocessor eventually shuts things off to fail safe.

The mode switch senses loading mechanism position and reports that to the microprocessor. If the mode switch becomes dirty unpredictable things can happen. Usually the microprocessor trys to fail safe when the mode switch isn't reporting properly and can prematurely shut everything off to fail safe.

If the microprocessor didn't shut things off, the tape could unspool in the machine, or it could end up eating the tape. And sometimes they still do unspool or eat tape.

I'm sorry that none of that tells you how to fix your machine.

Unless its an overly tightly wound cassette, the problem is likely to continue or get worse.. until you get the machine serviced.

ps.

I am merely a visitor to this forum and have no special knowledge.

Life is an education, in the art of Listening.

Last edited by jwillis84; 01-15-2018 at 10:35 AM.
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