Troubleshooting; Troubleshooting Tree - HP 9121D/S User Manual

HP 9121/22
DIS
SECTION IV
TROUBLESHOOTING
[1] TROUBLESHOOTING TREE
The HP 9121 and HP 9122 have unique self test procedures as
described in the Diagnostic section. The HP-85 Amigo protocol
diagnostics will work with the HP 9121, but not with the HP 9122.
The Power-on 5elftest can be used to isolate the control
PCA
or
the drive mechanism as follows.
Power
on
without disc(s)
yes
Isolate problem
with
&electable test&
4-1
If wles are OK:
replace
Controller
PCA