Notes about problems with MCM 141

MCM-141was tested 18-Nov-99.
Serial data does not come out on the output lines. And Readback string fails. However the voltages at the TP9 are OK.
1st block gives all overflow.
9 channels(ch# 65,  69, 76, 158, 159, 191) are dead(0 slope).
And  many bad channels( ch# 37, 47, 64, 137, 142, 143, 147, 149, 153, 155, 169, 171, 178, 183, 184, 187, 188, 190, 200, 210, 211, 212, 215, 228, 232, 233, 251) have higher pedestal and smaller slope.
3rd and 5th block AMU/ADC spy show that AMU/ADC outputs in these blocks vary very little with calibration injection.  Nontheless ADC values in these blocks look OK.
And 7th and 8th block preamp spy MUX's do not work. 


updated 23-Nov-1999
Sangsu Ryu