HP 54501A - Trouble Isolation Flowchart for HP 54501 A

FROM
CHART 0
PERFORM
KEYBOARD
SELFTEST
YES
YES, RANDOM KEYS
RPG NOT WORKING ` OR
YES
DETERMINE RPG,
KEYPAD, OR KEYBOARD
FAULTY(PARA 6-16)
REPLACE SYSTEM
BOARD ASSEMBLY
A1
CHART 4
REPLACE CABLE

END
54501 /T=
Figure 6-8 . Trouble Isolation
Flowchart for HP 54501A Keyboard
NOTE
Keydown power-up
must
be
performed on HP 54501A before selftests are
invoked . This ensures critical parameters to the
selftests are set and er-
roneous conditions
will
not result .
HP 54501A SERVICE