Digital Equipment DECstation 5000/100 Series, Maintenance Manual

Page: 308 / 392

Serial Communication Chip (SCC) Pins Test
The serial communication chip (SCC) pins test checks the
control pins on the communications connectors. To run the
SCC pins test, type
t 3/scc/pins
[ line ] [ attachment ] and press
Return.
When you type the SCC pins test command,
Replace the optional line parameter with a value that
specifies the communications connector that you want to
test.
Specify 2 to test the communications connector on the
right as you face the back of the system unit.
Specify 3 to test the communications connector on the
left as you face the back of the system unit.
Replace the optional
attachment
parameter with a value
that specifies the loopback hardware that you attach to the
communications connector being tested.
Specify 29-24795 if you attach a 29-24795 loopback
connector. 29-24795 is the default type of loopback
connector.
Specify H8571 if you attach an H8571 loopback
connector.
Specify hm if you attach an hm loopback connector.
Specify H3200 if you attach an H3200 loopback
connector.
Table D-7 lists the specific pin pairs that each loopback
tests.
D–16 Base System Test Commands and Messages