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Error code 20 on a sony evo9850

What can you tell me about the procedure to attack this problem. I have access to meters and scopes. Can you email me a schematic of the section I will be working on. Thanks Joe Wagner

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Re: error code 20 on a sony evo9850

Possibly a tape transport error from what I understand.

Posted on Jun 11, 2008

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Have a Sony SLV-N71 VCR with error code ASC or AC5...not sure. Can you explain?

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Sony evo 9850 error code 20

From what i've read an Error-20 on a Sony BSP deck is a tape transport problem. Someone with the same error code (on a BSP model) said the actual tape loading mechanism was bad and they had to replace the hardware inside the machine that loads and ejects the cassette.

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Tape stuck in sony uvw-1800

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SLV-660HV Will not load

If you removed the tape carriage assembly, gear timing is probably off, assuming it is gear driven. Being one tooth off will prevent things from working properly. Gears will often have a mark (like an arrow or dot) which must be lined up with each other, in a mode specified in manufacturer service literature. Another possibility is sensors. There are sensors (usually optical) which tell the logic when the tape is properly loaded. If one of these is broken, or otherwise non-functional, logic circuitry will go into error mode, and, in this case, eject tape & display an error code. Lastly, check your mode switch. This tells the logic what position the mechanicals are in (gears/levers/slides). Again, if this is awry, you will have an error condition.

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