North Star DIMENSION Service Manual page 128

DIAGNOSTICS
Service Diskette #1 (cont.)
Communica - Two test modules are not part of the normal test sequence.
tion Port These modules verify the integrity of the shared parallel
Testing port and serial port #1. (Testing of serial port #2 will be
implemented in a future release of the diagnostic program.)
These two tests are not run in the normal sequence because
they require the installation of special test connectors. In
order to install the test connectors, peripheral devices must
be disconnected to run any test.
To use these two tests , you must construct two test
connectors using the pinout charts illustrated below. The
connectors are readily available from electronics parts
supply houses (such as Radio Shack). Radio Shack part
numbers are shown.
Serial Port # 1
(Radio Shack #276-1547)
(Sub-D male connector)
Pin#--->Pin#
Parallel Port
(Radio Shack #276-1548)
(Sub-D female connector)
Pin#--->Pin#
#2 ---> #3 #7 ---> #16
#4 ---> #5 ---> #22
#19 ---> #21
#6 ---> #8 ---> #20
#15 ---> #17 ---> #24
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