Service manual

3-8 AlphaServer 4000/4100 Service Manual
3.2.1 Power Control Module LEDs
The PCM has 11 LEDs visible through the system card cage. The LED display
shows the relative placement of the LEDs.
Figure 3-3 PCM LEDs
PK-0714-96
DCOK_SENSE
PS0_OK
PS1_OK
PS2_OK
TEMP_OK
CPUFAN_OK
SYSFAN_OK
CS_FAN0
CS_FAN1
CS_FAN2
C_FAN3
Normally On
Tested at one-second intervals
Off if power supply not present
or broken