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TROUBLESHOOTING AND DIAGNOSTICS
Assure that the Winchester disc is spinning up. A very distinct audible indication occurs within the first 10
seconds after power is applied if the disc is spinning up.
1. Check power supply voltages (Figure 8-1)
2. Ensure that all cables are connected properly.
3. Ensure that configuration switch on the controller board is set correctly. (Figure 8-6)
4. Ensure that configuration switch on drive (See Figure 8-6) is set correctly.
5. Replace controller if none of the above correct the problem.
6. Replace the original controller in the product and replace drive if controller replacement does
not correct problem.
1. Ensure that a disc is installed into the flexible disc drive.
2. Check power supply voltages (Figure 8-3)
3. Ensure that all cables are connected properly.
4. Ensure that configuration switch on the controller board is set correctly. (Figure 8-8)
5. Ensure that configuration switch on drive (See Figure 8-6) is set correctly.
6. Replace controller if none of the above correct the problem.
7. Replace the original controller in the product and replace drive if controller replacement does
not correct problem.
It is possible that either a controller or drive can cause this fault.
The two types of drives use some dif-
ferent circuits on the controller, and it is not always clear whether the controller or the drive is causing a
problem related to apparent failure of a drive.
1. Place the FLOPPY
section of SW3 to the ON position and repeat the power-on selftest.
If the
power-on selftest passes, replace the flexible disc drive. (Make sure the FLOPPY section of SW3
is returned to the proper position for the HP 9153A/B.)
2. If failure persists, return SW3 to the correct position and replace the controller PCA.
3. If the failure persists, replace the original controller
in the HP
9153A/B
and replace the
Winchester disc drive.
PROCEDURE P3 (FAULT and ONLINE or FAULT and flex ACCESS LED's on)
Controller
is the most probable defective
assembly.
Replace
controller and
re-test.
If failure persists,
replace the Winchester disc drive if the ONLINE
LED is on, or replace the flexible disc drive if the flexible
disc access light is on.
1. Determine whether HP double-sided media is being used in the system.
Some media, including
HP single-sided media, will not perform properly in the HP 9153A/B when the
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