197
Fuser Lamp Drive Circuit
The Fuser Lamp is powered by 100 VAC (200 VAC). It is driven by the LVPS and controlled by the nSSR
signal from the SC PC Board. When the CN103, Pin11 (nSSR) on the LVPS goes LOW, the Fuser Lamp
turns ON. This lights up the PC102 LED and activates the TRC100 photo-triac, and VAC 115 VAC is sent
to the Fuser Lamp. The time at which TRC100 is actually activated depends on the 100 VAC (200 VAC)
sine wave. When the cross-voltage for Pin 6 and Pin 4 of PC102 is other than 0 Volts (sine wave
exceeds 0 volts), PC102 inhibits the activation of the triac and turns ON the Fuser Lamp.
Fuser Temperature Control Circuit
The fuser temperature is controlled by IC1 on the SC PC Board, which contains A/D (Analog/Digital)
converters ANI0 to ANI7. The Fuser Temperature Control Circuit uses A/D converter, ANI1. When the
PC001 drive current is transmitted from the SC PC Board to the PSU (LVPS), the Fuser Lamp turns ON.
IC32 is a comparator with open output at pins 1 and 7 and is used as an abnormal temperature detection
circuit. IC32, pin 7, has a high impedance when Q44 is activated, turning ON the Fuser Lamp.
An abnormal temperature is detected when the VTH voltage level becomes higher than V+, forcing IC32,
pin 7 Low and deactivating Q44.
Abnormally low and high temperatures, as well as Thermistor release status, are detected by IC1 (CPU)
programming.
Pulse
Motor
Laser Printer Motor Drive Circuit Block Diagram
SHINE
IC3
+24 VM
3
1
6
4
MMnA
MMpA
MMnB
CN54
MMpB
Motor
Driver
IC38
11
11
CN103
+24V
R127
4
2
1
PC102
nSSR
TRC100
2
1
2
1
C109
C108
R112
R111
R111
2
1
CN102
H
CN102
Fuser Lamp
Fuse
Thermostat
Thermal Fuse
3
SC PCB
6
LVPS
Fuser Lamp Drive Circuit Diagram
L301
L101
Содержание Panafax UF-5300
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Страница 246: ...DZSD001829 15 Panasonic Software Operating Instructions Network Firmware Update Tool for Service Technicians Version 3 ...
Страница 259: ...Network Firmware Update Tool LAN Page 14 13 Confirm the message in the text box and click OK to close the tool or ...
Страница 260: ...DZSD000965 18 Panasonic Software Operating Instructions Local Firmware Update Tool for Service Technicians Version 3 ...
Страница 274: ...Published in Japan ...