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Repair Sinclair DM235 DMM

  • Thread starter Reinhard Zwirner
  • Start date
R

Reinhard Zwirner

Hi,

Can somebody please give me a hint where to find a circuit diagram or a
service manual for an old Sinclair DM 235 DMM (for free)? When switched
on only one digit is active displaying a random number. Additionally I'm
searching for a datasheet of AY-5-3507 display driver (?).

Any help is really appreciated.

Best regards

Reinhard
 
N

N_Cook

Reinhard Zwirner said:
Hi,

Can somebody please give me a hint where to find a circuit diagram or a
service manual for an old Sinclair DM 235 DMM (for free)? When switched
on only one digit is active displaying a random number. Additionally I'm
searching for a datasheet of AY-5-3507 display driver (?).

Any help is really appreciated.

Best regards

Reinhard


somewhere in wwwland is a sinclair products forum
 
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