IBM 7012 G Series, Руководство по обслуживанию

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3-1520-2
Service Guide
Power Supply Status
In 7012 G Series models, if the system detects a power supply failure on the base unit or
MCA expansion unit, it turns the power off and displays SRN
409-Axy
, where xy is the
hexadecimal value of the power status register and gives some information on the power
fault, as described in this MAP.
If the power fault condition occurs on the disk expansion unit, while the system is running,
the system may detect the fault and log the error; however, if a reboot is launched, the
system will recognize the power fault and display
409-Axy
SRN.
Line two of the operator panel display identifies the unit that contains the error. Units are
numbered as:
0 Base System unit
1 Expansion unit
Step 1
You may be directed to this MAP for several reasons:
1. SRN
409-Axy
appears on the operator panel display: a power fault has been detected
on some unit and the entire system has been powered off.
Go to Step 9.
2. The power button has been pressed (set to on), but the power does not stay on; no
information remains displayed on the operator panel display.
Go to step 2.
Step 2
(from Step 1)
1. Set the power button on the system unit to Off.
2. Unplug the system from the electrical outlet.
3. Set the key mode switch to the Service position.
4. Plug the system into the electrical outlet.
Is anything (even a blinking cursor) displayed in the operator panel display?
NO Go to Step 3
YES Go to Step 7