HP HP-97 - Page 102

Component-Level Maintenance
HP-97
Table 4-13. Logic PCA Troubleshooting Procedure
Use this procidure to isolate a malfunction in the logic PCA.
STEP ACTION
1.
2.
Set the switches as follows:
OFF IHIM ON
TRACE
MAN I NORM
PRGM HHIM RUN
Press [PRINT x].
Test individual functions as
considered necessary (refer to
appropriate key sequence tests
in figure 4-1 and table 4-1).
Run logic PCA operational test
(refer to paragraph 4-10).
Replace, one at a time, the
ROM 0,PIK, and ROM 3.
(Return to step 1 after each
replacement.)
It the display shows 0.00
and the printer prints 0.00,
go to step 3.
If the display shows 0.00,
but the printer does not
print 0.00, go to step 5.
If the display does not
show 0.00 and the printer
does not print 0.00, go to
step 6.
Repair individual keys as
required.
If the logic PCA operational
test is satisfactory, the
logic PCA is repaired. STOP
TESTING.
If not, return to step 1.
When the proper display and
print are obtained return to
step 3.
4-3Y