2-1540-8 Installation and Service Guide
Step 7(from Steps 1 and 4)
1. Set the power switch on the system unit to Off.
2. Record the slot numbers of the Micro Channel adapters, label and record the location of
any cables attached to the adapters. Remove all the adapters from the I/O planar.
3. Disconnect and remove the disk drive frame and disk drives.
4. For Models 320, 32E, and 32H, remove the external diskette drive riser card (if installed).
For all other Models, remove the serial port extender cable connector P16 and the
Ethernet riser card from the system planar.
5. Disconnect any cables that are plugged into connectors S1, S2, P, K, T, and M on the
rear of the system unit.
6. Insert the first diagnostic diskette into the diskette drive.
7. Set the power switch on the system unit to On.
8. Wait for one of the following conditions to occur:
•The 3.5-inch diskette drive in-use light is on and c05 or c07 is displayed in the
three-digit display.
•The system stops for at least three minutes and a constant number, character, or
symbol is displayed in the three-digit display and the power light is on.
•The system stops and two or more numbers with values between 221 and 296 are
displayed alternately in the three-digit display.
•The system stops and a flashing 888 is displayed in the three-digit display
•The power light does not come on, or the power light comes on but does not stay on.
Is the 3.5-inch diskette drive in-use light on and c07 displayed in the three-digit
display.
NO One of the FRUs remaining in the system unit is defective.
In the following order, exchange the FRUs that have not been exchanged:
1. Diskette drive
2. Diskette drive signal cable
3. Key mode/reset switch assembly
4. System planar
5. CPU card
6. Voltage regulator card (Model 39H)
7. Power supply.
Repeat this step until the defective FRU is identified or all the FRUs have
been exchanged.
If the symptom did not change and all the FRUs have been exchanged, call
your service support person for assistance.
If the symptom has changed check for loose cards, cables, and obvious
problems. If you do not find a problem, return to Step 1 in this MAP and
follow the instructions for the new symptom.
YES Go to Step 8.