Hi, while restoring radio amply Yamaha R1000, I have found a problem in to DC DC Voltage converter Processor named "Yamaha stk7100". This device has 16pins and coverts from +/- 73VDC and 42,5VDC to +/- 42VDC and 24 VDC and 25 VDC in each specific pin. But it does not provide the valid voltage to the main amply stage, it should convert form +/-73VDC to +/-42 VDC but it works only for one branch/side respect to the zero, the other is left to 73VDC (-42VDC ; 0VDC ; +73VDC). Somewhere I have found that maybe Darlington STK 3106 (Maybe Sanyo) may be the corresponding/equivalent one for commercial brand.
Has anyone faced the same problem? Does it be possible to find a conversion table from this probably proprietary label from Yamaha to a commercial one, e.g. Sanyo or others? Thank you very much for each useful comment or reply and sorry for my terrible English and not being so experienced in electronics restoring.
Has anyone faced the same problem? Does it be possible to find a conversion table from this probably proprietary label from Yamaha to a commercial one, e.g. Sanyo or others? Thank you very much for each useful comment or reply and sorry for my terrible English and not being so experienced in electronics restoring.
