Xerox DocuPrint N2125 Service Manual page 309

Block Diagram Tray 2 and Tray 3
Figure 6 Block Diagram Tray 2 and Tray 3
Initial Issue
DocuPrint N2125
Print Engine Controller PWB <=> LVPS PWB and Fuser Assembly
ure 7) (Table 2)
Figure 7 Print Engine Controller <=> LVPS <=> Fuser
Print Engine Controller PWB <=> LVPS PWB and Fuser Assembly
Table 2 shows the signal names for the Print Engine Controller PWB <=> LVPS PWB path:
Signal Name Description
FAN ON Fan drive power that drives the Fan Assembly with 2 voltages, 24V for High
speed and 15V for Low speed
/HEAT (TTL) Fuser control signal to switch AC power to the Heat Rod on and off
Low: 0V (ON), High: 3.3V (OFF)
/FHIGH (24V) Fan speed switching signal that switches the speed of rotation of the Fan
Assembly between High and Low
Low: 0V (High speed), High: 24V (Low speed)
FAN ALARM Fan monitor signal. Goes Low when the rotation of the Fan Assembly is abnor-
(TTL) mal
Low: 0V (Abnormal), High: 3.3V (Normal)
02/2000
7-9
Table 2 Signal Names
Base Engine
(Fig-
Wiring Data