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 Post subject: Sony MDP-455
PostPosted: 13 Nov 2022, 08:30 
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hi,

this player uses a stupid cable that hooks to a 12 pin jack to do calibrations. apparently it has switches that let you turn the tracking, and thread servo off..to adjust some pots.

anyways.

I'm trying figure out how those switches would have worked.
it has 5 signal pins, plus ground..for the readings

the control pins are labeled F, E, 4d, sled 0, sled -, and Rf

F, and E are inputs to the focus amp.
4d goes the servo chip.

sled 0......

well anyways. any electronics experts can look at the schematic and tell me how to turn off the servos to do the adjustments.

I hate these sony machines!!!


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 Post subject: Re: Sony MDP-455
PostPosted: 13 Nov 2022, 15:43 
Jedi Master
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I can't read schematics but, you have dip switches that need to me turned on or off????
If you could post the board also so others may be able to help you.
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 Post subject: Re: Sony MDP-455
PostPosted: 19 Nov 2022, 08:46 
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thanks, Ihad to build a breakout cable that had switches on it. it was a special device sony made it has caps, and resistors. anyways i found the schematics for that device and built one, set it all up, and blew 2 microfuses because its impossible to service with it at any other angle except horizontal, with a board dangling.

waiting for fuses,

started working on a mdp 600. hich im about to make a thread on.
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 Post subject: Re: Sony MDP-455
PostPosted: 19 Nov 2022, 09:43 
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YA, the breakout cable works with sony mdp 600 too, I'm so lucky that one guy on this forum found the scehmatics for it. i kinda cobbled it together with a radio shack lab electronics lab kit I had.

Haven;t gotten to use it yet.

also repairing my oscillascope from the 60's that has a blown power supply, waiting for parts,


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