HP HP-97 - Page 52

Assembly-Level Maintenance
HP-97
Table 3-8. Assembly Level Troubleshooting Procedure (Continued)
STEP ACTION
10.
Set the switches as follows:
OFF IHIM ON
TRACE
MAN IM NORM
PRGM EHI RUN
Key in -8.888888888-88.
The display should read
-8.888888888-88.
Possible problems include:
o digit over bright on dis-
play.
o digit turns on next digit,
causing a ghost image to
appear.
0 one digit missing segments.
o all digits missing same
segments.
0 single digits missing from
display.
o segments of digits shorted.
Press [PRINT x].
The printer should print
-8.888888888-88. Check for
acceptable print intensity.
Press all the keys.
If the display is satisfac-
tory, go to step 9.
If the display is blank, go to
step 14.
If the printer operates satis-
factorily, go to step 10.
If the printer does not oper-
ate satisfactorily, go to step
16.
If the keys "feel positive",
go to step 11.
If the keys do not feel posit-
ive, go to step 20.
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