[volt-nuts] Datron 1281 Selcal Multiplier

Михаил timka2k at yandex.ru
Sat Apr 5 01:14:20 EDT 2014

Hello, John

The full Service Manual with circuits description for Datron 1281 is very rare.
If you have it, you may upload it to the http://ko4bb.com/

Mickle T.

Saturday, April 5, 2014, 6:11:09 AM, you wrote:
sun> These error codes 2292, 2282, 2272, 2262, 2252, 2216, and 2214 all use 
sun> the Selfcal Multiplier circuit.
sun> I have all the error codes listed above, when doing a INT SRCE CAL.
sun> Output at M609 pin-2  is not a dc level, therefore M609 pin-15 is a 
sun> sawtooth waveform.
sun> Output on M609 pin-2 is a 10% duty on time square wave with a positive 
sun> offset.
sun> All IC's are functional
sun> What is the problem with this selfcal multiplier circuit?
sun> John
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