IBM System/36 Maintenance Information Manual page 78

505 Control Panel Symptom Table
Symptom Information Action
The Console, Program, and
The control panel Perform the following:
Processor lights are all on. interface card failed the
1. Certain power supply faults can
self-test.
or cause this problem. Measure the
The Output display contains less
voltage on the following board
than four characters or a character
power pins: AI-PI pin 3, AI-P2
that is not hexadecimal.
pin 4, AI-P2 pin 5, and AI-P2 pin
6. Measure the voltage on BI-P4
pin 3 and Bl-P5 pin 5. See "435
DC Voltage Distribution" on
page 4-11. The voltage measured
on all of the above pins should be
between 4.5 and 5.5 volts. If the
above measured voltages do not
meet criteria, go to "420 Power
Supply FRU Isolation Procedure"
on page 4-6, or continue with step
2.
2. Exchange the following FRUs, one
at a time, in this sequence:
a. AIF2 work station
adapter/control panel interface
card
b. A1G2 CSP card
c. Al Board
3. Load the system from disk ("330
Loading the DCP from Disk" on
page 3-13) or diskette 61 ("332
Loading the DCP from Diskette"
on page 3-13) to verify the repair.
The control panel does not operate The control panel and Go to "507 Control Panel Service
correctly. the control panel Check" on page 5-4.
interface card are not
communicating.
The system will not function.
Go to "507 Control Panel Service
Check" on page 5-4.
A system power problem is present. Go to "507 Control Panel Service
Check" on page 5-4.
5-2
5363 Maintenance Information