User manual

95.08.23.11.29
Color LaserWriter 12/600 PS Basics & Theory 1–24
+24V
POFF
PCONT
DOPN
FXSTS
SFSNS
/FXUON
/FXLON
THI
/FXSNS
H1
H2
/FXROF
/FXENB
Relay
+5V
+5V
Power Supply
J101-6
-5
-7
J112-31
-30
-28
-29
-27
-26
J112-22
J112-24
Mechanical
Controller
Board
The voltage decreases
as the fuser roller
temperature increases.
"L" when the fixing unit
is installed.
"L" when the fuser assembly
is properly installed;
"H" when improperly
installed; pulse signal when
fuser heater is ON.
"H" when the safety circuit
turns OFF the relay.
"L" to turn OFF the relay.
The fuser heater can be
turned ON when pulses
are output.
"L" to turn ON the upper
fuser heater.
"L" to turn ON the lower
fuser heater.
Fuser Roller
Temperature
Detection
Thermistor
TH
Upper
Fuser Heater
Lower
Fuser Heater
Thermoswitch
TP1
Thermoswitch
TP2
Fuser Assembly
Fuser Abnormality
Detection Circuit
Safety
Circuit
Power
Switch
SW1
Door
Switch
SW2
DC Controller Board
"H" when the front door,
pickup door, or fuser access
door is open.
"L" when the power
switch is ON.
"L" to turn ON the printer.
Power Supply Control IC