No rpm
Posted: Tue Nov 22, 2011 8:50 am
Good morning,
My name is J.B.
I am in the process of building an MS-II V.3.. I am running MSII Rev 2.905, processor type MS-II daughterboard.
I passed the power supply and communications tests and have completed the input section.
I am not seeing any tach input. If I power down I can vary the other inputs.
D1 is jumpered, d2 is shorted, jumpers are placed at Tach select-opto in, XG1-XG2 and OPT OUT-T SEL.
I have tried standard stim and jimstim for testing. Jimstim tests for tach out confirmed OK.
Put an O-scope on Tach select jumper, D2, R12, and op out jumper.
I can see and vary a signal at all locations , scope is many years out of calibration, but I can see and vary the signal from in to out at IRQ1.
Processor was removed for this test.
Any ideas?
Tnx. J.B.
My name is J.B.
I am in the process of building an MS-II V.3.. I am running MSII Rev 2.905, processor type MS-II daughterboard.
I passed the power supply and communications tests and have completed the input section.
I am not seeing any tach input. If I power down I can vary the other inputs.
D1 is jumpered, d2 is shorted, jumpers are placed at Tach select-opto in, XG1-XG2 and OPT OUT-T SEL.
I have tried standard stim and jimstim for testing. Jimstim tests for tach out confirmed OK.
Put an O-scope on Tach select jumper, D2, R12, and op out jumper.
I can see and vary a signal at all locations , scope is many years out of calibration, but I can see and vary the signal from in to out at IRQ1.
Processor was removed for this test.
Any ideas?
Tnx. J.B.