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B+K Precision 1230 Digital Color Generator Schematics?

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    B+K Precision 1230 Digital Color Generator Schematics?

    I have this old B+K Precision 1230 Digital IC color generator. It should be an NTSC pattern generator. Unfortunately it seems dead, though +5 seems to be OK (+4.7, maybe this is too low but it's within 10%). Anyone happen to have the schematics to this thing before the gruesome effort of trying to manually extract from the PCB?

    TIA.
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