HP 3562A Service Manual page 403

MODEL
3562A
Perform steps
E.
Press the line switch off.
1 .
2 . Replace the AB Global RAM in its card nest. Place the
on the
03562-66540
Press the line switch on.
3 .
4 .
After the power-up sequence is completed, use a logic probe to veri f y the signals
in table
S. lf any of the lines are not toggling, start troubleshooting with the
Controller (go to
Replace the
6.
7-1 1 ISOLATING TRIGGER FAILURES
This procedure assumes the instrument operates correctly in the free run mode, but does
not operate correctly in the trigger mode. Follow this procedure starting with part A to
isolate the defective assembly.
A. Start
Press the HP
2.
SPCl
. . . . . . SERVIC
FCTN
If any self-tests fail, go to paragraph
3 .
7-38
1
through as follows:
5
extender board.
are toggling between TTL level high and TTL level low.
7-1 2
Table Control Lines Set #3
7-1 2
Test
Location Signal
A6 U 3 04-6 B L D S L
A6 U 304-7 BWRI T E L
A6 U 304-9 B U D S L
8-9).
Digital Filter Controller in its card nest.
A6
keys as follows:
3562A
TEST . . . . . . TEST
ALL
A6 Digital Filter Controller
I n/Out
A 6 Out
A 6 Out
A 6 O u t
7-7 .
FAULT ISOLATION
Digital Filter
A6