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Panasonic VP-5720A oscilloscope freezed

Hi, I have a old Panasonic VP-5720A DSO that power up but keys is locked and CRT display nothing. I have try to disconnect deflections (plus removed "SCOPE" board) and CRT display one big center dot, therefore HV supply is working. I suspect that digital control section is defective, considering inactivity of front panel switches (some lights indicators lights up, always the same, but pressing switches make no changes). Someone has experience in repairing this DSO? Otherwise I can find schematics diagram?

Thanks.

Paolo.

Reply to
Telespalla Bob
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Hi Paolo,

I'm not familiar with your scope, but have you tried looking for a battery and checking it's voltage? Many DSO scopes with backup batteries cease to function and go completely dead when their battery runs down.

Reply to
JW

JW ha scritto:

Thanks, but nothing... the battery is innocent. Any other ideas? You know where I could find the diagram? Also paying...

Thanks.

Reply to
Telespalla Bob

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