HP HP-97 - Page 61

HP-97
Component-Level Maintenance
(D
y
SET SWITCHES:
orr [l o~
TRACE
MANC:- NORM
praM I ruN
y
PRESS KEYS INDICATED
FOR DESIRED OPERATION.
(SEE TABLE 4-1)
IS
DISPLAY/PRINTOUT
CORRECT
?
YES SWITCH
CALCULATOR
OFF.
SWITCH TO PRGM MODE.
1. IF KEYCODE CONSISTS OF 2
DIGITS, PRESS OPERATION
KEY.
2. IF KEYCODE CONSISTS OF 4
DIGITS, PRESS g3 FOLLOWED
BY OPERATION KEY
3. IF KEYCODE CONSISTS OF 6
DIGITS, PRESS 2 OPERATION
KEYS FOLLOWED BY (..
REPLACE (ONE AT
A TIME, RETURNING
TO START AFTER
EACH REPLACE-
MENT) ROM 6,
ROM 2, ROM 0, AND
ROM 1, UNTIL
CORRECT DISPLAY/
PRINTOUT OR
KEYCODE IS
OBTAINED.
IS
KEYCODE
CORRECT
?
REPLACE (ONE AT
A TIME, RETURNING
TO START AFTER
EACH REPLACE-
MENT) THE ROMS
INDICATED UNDER
ROM FAILURE,
UNTIL CORRECT
DISPLAY/PRINTOUT
IS OBTAINED.
Figure 4-1. Faulty Function Verification and Repair
4-3