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The master controller daughter card mounts onto the master motherboard. The master
controller daughter card contains a service port, a direct drive user interface connection,
and a port for a service modem.
MODEM
2
LED1LED2LED3
SERVICE PORT DISPLAY
CPU CARD
BD ASSY
566-149
BAT ON BAT OFF
Figure 2-2. Master Controller Daughter Card (566-149)
Continued on next page
Introduction to FACPs (4100U), Continued
Master Controller
Daughter Card
SERVICE MODEM
CONNECTOR (P4)
BATTERY BACKUP
ON/ OFF JUMPER (P3)
SERVICE PORT (P5)
DIRECT-DRIVE
DISPLAY PORT (P6)
CONNECTOR TO CPU
MOTHERBOARD (P9)
SERVICE PORT
COMM JUMPER (P1)
CPU BOOTLOADER LEDs
(LED1 – LED4)
TROUBLE LED (LD5)
TROUBLE LED (LED5):
OFF: No trouble.
FLASHING: CPU has power but the software is
failing to hit the watchdog
ON: The 5 V is outside the acceptable range
WARM START
SWITCH (SW1)