Power Monitor Card - HP 3000 9x9KS Service Manual

Table 3-2 shows the DC voltage requirements for the individual components of the computer.
Power Display
DC
Monitor Panel
Voltage
+15V X *
(HKP)
+12V
-12V
+3.3V
+4.4V
+5V
* = +5V is provided by the Power Monitor via the ribbon cable.
** = K100 only.

Power Monitor Card

The Power Monitor card is responsible for monitoring ambient (room) temperature, internal temperature,
all DC voltages, system fan speed, and the key switch. The Power Monitor is responsible for controlling
fan speed, DC outputs (except +15V), the Display Panel, and system resets. The Power Monitor card sends
messages to the Display Panel ONLY when DC outputs are disabled.
Tables 3-3 and 3-4 detail all the messages that can be sent to the Display Panel by the Power Monitor card.
Table 3-3 is for Non-error messages, and table 3-4 is for Error messages. Use these tables to determine the
cause of the message and the action suggested to resolve the problem. Some messages may require further
explanation. These messages will have notation numbers that correspond to further details following the
table.
Display Panel Message
SWITCH OFF
SWITCH ON
PROCEEDING TO
TURN DC ON
1. This message should be present for only a few seconds. If this message stays on the Display Panel,
either PDC did not launch self test, or the communication path between the System Board (PDH) and
the Display Panel is defective.
3-6 Troubleshooting
Table 3-2. DC Voltage Requirements
Computer component
CPU System Memory HP3000
Board Core I/O
X
X
X X X
X **
X X X
Table 3-3. Non-error Messages
Cause
Key switch is in the STANDBY position
Key switch is in ON or SERVICE position
1 Power Monitor is about to enable DC outputs.
HP9000 HSC Exp.
Core I/O I/O
X X X
X X X
X X
X X X
HPPB Peripheral Fans
Bay
X X X
X
X X
Action
None
None
None