Circuit Board Check - Processor Technology CUTS Assembly And Test Instructions

PROCESSOR TECHNOLOGY CORPORATION
CUTS, COMPUTER USERS TAPE SYSTEM
SEC'l'ION II
2.6.1 Circuit Board Check
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Visually check CUTS PC board for solder bridges (shorts)
between traces, broken traces and similar defects.
Check board to insure that the +S-volt line, +16-volt
line, +5-volt bus, +12-volt bus and -12-volt bus are not
shorted to one another or to ground. Using an ohmmeter,
make the following measurements (refer to CUTS assembly
drawing in Section VI.):
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+S-volt Line Test. Measure between edge connector
pin 1 or 51 (left end of connector) and pin 50 or
100 (right end of connector). There should be no
continuity.
+16-volt Line Test. Measure between edge connector
pin 2 or 52 and pin 50 or 100. There should be no
continuity.
S/16 Volt Line Test. Measure between edge connector
pin 1 or 51 and pin 2 or 52. There should be no
continuity.
+5-volt Bus Test. Measure between the upper mounting
pad for D2 (to the left of location K2) and pin 50 or
100 of the edge connector. There should be no
continuity.
+12-volt Bus Test. Measure between upper mounting
pad for C9 (in upper right corner below CS) and pin
50 or 100 of edge connector. There should be no
continuity.
-12-volt Bus Test. Measure between upper mounting
pad for CIS (between U16 and U17) and pin 50 or 100
of edge connector. There should be 'no continuity.
5/12/(-12) Volt Bus Test. Measure between upper
mounting pad for C2l (lower left corner) and upper
pad for C9, between upper pad for C21 and upper
mounting pad for CIS, and between upper pad for C9
and upper pad for CIS. You should measure no conti-
nuity in any of the three measurements.
If visual inspection reveals any defects, or you measure
continuity in any of the preceding tests, return the
board to Processor Technology for replacement.
If the board is not defective, go on to next paragraph.
II-S