IBM System/36 Maintenance Information Manual page 67

Data storage adapter AlD2
Disk adapter AlC2
Main storage card
Note: The cards and connectors to this point will isolate the base power supply.
15. To test for a defective power on light, do the following:
a. Power on the system. If the base power supply fan turns and the power on light is off, the light is
defective or the distribution to the light is bad.
b. If the light is defective, exchange the control panel ("510 Control Panel Removal" on page 5-9).
c. For bad distribution to the light, check connectors and leads.
If all of the above cards and connectors have been removed and the problem is still present, power off
the 5363 and continue with the next step.
16. Exchange the Al board ("342 Al Board Removal and Replacement Procedures" on page 3-18).
17. To isolate the feature power supply or parts attached, plug in the feature power supply and continue.
18. Power off the 5363 and disconnect the power cord at the customer power outlet and the 5363.
19. Unplug the feature power supply.
20. With the power on/off switch set to the on position (I), verify continuity from J1 line to J2 line, and J1
neutral to 12 neutral on base power supply ("430 AC Point-to-Point" on page 4-10).
If you have continuity, continue with the next step.
If you do not have continuity, exchange the base power supply ("430 AC Point-to-Point" on page 4-10).
21. Set the power on/off switch to the off position (0) and reconnect the power cord and the feature power
supply.
22. Unplug P4, P5, and Pll, and power on the 5363.
23. Observe the feature fan.
If the feature fan is turning, continue with the next step.
If the feature fan is not turning, exchange the feature power supply ("406 Feature Power Supply
Removal" on page 4-3).
24. Power off the 5364, reinstall all the connectors you removed, and continue with the next step.
25. For each of the cards and connectors in the following list, perform steps a through d:
a. Remove the card or connector.
b. Power on the 5363.
c. If the feature fan is turning, the FRU that is disconnected or the card that is removed is the failing
FRU. Power off the 5363 and install a new card or FRU.
d. If the feature fan is not turning, power off the 5363, reinstall the connector or card, and repeat steps
a through d for the next item on the list.
Pll Tape
Main storage card B l-G
Note: The following cards must be installed in the indicated Bl board positions: The Feature lOP
(Bl-A) and Main Storage Card (BI-G).
It
is recommended that the Tape feature card be
located in position (Bl-F) for cable retention purposes. The other cards can be plugged in any
remaining positions.
Feature lOP
(1
each)
Local Area Network (LAN) (2 each possible)
Communications (2 each possible)
Tape (1 each possible)
Section 4. Power Procedures
4-7