HP HP-97 - Functional Test

Component-Level Maintenance HP-97
4-16. FUNCTIONAL TEST
4-17. To run the functional test, follow the step-by-step procedures
shown in table 4-4,.
4-18. When the indicated display is not obtained, replace IC's (CRC,
PIK, or ROM's designated by number) one at a time. After each
replacement, return to step 1 of the functional test and reiterate,
replacing the indicated IC's until the proper display is obtained.
4-19. Before using data card 1 in step 12, erase it using the
following procedures (to save time, a number of cards can be erased
at the same time and all labeled data card 1 for use in later repairs):
a. Switch a working calculator ON.
b. Switch to PRGM mode.
c. Feed both sides of data card 1 through the card reader.
4-20. Steps 16A, 16B, and 16C are checkpoints to identify the point
at which the functional test program halts or begins to loop endlessly.
This 1location is needed to isolate the probable ROM failure, as given
in table 4-5. The numbers are displayed only to indicate these checkpoints
and need not be checked for accuracy; this is done internally by the
functional test program.
Table 4-4., Functional Test
STEP PROCEDURE DISPLAY PRINTOUT REPL AICCEMENT
1 Set switches:
orr [ on
TRACE
mAN [T NorRm
prGM [ run
2 Press 0.00
3 Read side 1 of functional test card. Crd
4 Read side 2 of functional test card. 0.000000000 00 CRC, 0
5 Switch to PRGM mode. 0.00 CRC, 1,0
6 Press 224 24 0,5,1, CRC
7 Press 001 00 0, 5,1, CRC
8 Press 000 0, 2
9 Press 0 001 21 11 0,2,1,6,5
10 Switch to RUN mode. 0.000000000 00 2,1,0
11 Press Y -7.777777777-77 See Fig. 4-3
(pause)
Crd See Fig. 4-3