Lexmark W812 - Engine Board <-> LVPS <-> Interlock SW and Fan (1;3)

Connector Locations 5-19
4022-XXX
Engine Board <−> LVPS <−> Interlock SW and Fan (1/3)
Signal names for Engine Board <−> LVPS route
Pin numbers and voltage levels for Engine Board ↔ LVPS route
Signal names for LVPS ↔ Fan route
Pin numbers and voltage levels for LVPS ↔ Fan route
Signal Name Explanation
FMLOCK A signal that transmits the fan alarm signal to the engine board.
/FAN FAST A signal that changes the fan rotation speed, and instructs to set the
fan rotation speed to high.
/FAN SLOW A signal that changes the fan rotation speed, and instructs to set the
fan rotation speed to low.
24V INT OPEN A signal that opens the interlock SW.
/HEAT ON A signal that instructs to heat the heater rod of the fuser. This signal is
set high at heating.
P10/
P27
P101/
P27
Signal Name
Signal Direction
M: Engine Board,
L: LVPS
Trigger
High
Level
Low
Level
10-2 101-15 FMLOCK M ← L Level TTL TTL
10-3 101-14 /FAN FAST M → L Level 24V 0V
10-44 101-13 /FAN SLOW M → L Level 24V 0V
10-10 101-7 24V INT OPEN M ← L Level 24V 0V
27-4 271-1 /HEAT ON M → L Level TTL TTL
Signal Name Explanation
FAN 24V This is fan driving power that drives the fan using two types of
voltages: 24V at high-speed rotation and about 12V at low-speed
rotation.
FAN ALARM A fan monitor signal. This signal is set high when an error is
detected during rotation of the fan.
Signal Name
Signal Direction
M: Engine
Board,
L: LVPS
Trigger High level
Low
level
P108-1 FAN 24V L → F Level 24V 12V
P108-2 FAN ALARM L ← F Level TTL TTL
P108-3 FAN 24V RTN L → F Level 0V 0V