Dell 2355DN Service Manual - Page 30

■ SMPS Switching Mode Power Supply, ■ FUSER AC POWER CONTROL

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Product spec and feature ■ SMPS (Switching Mode Power Supply) It is the power source of entire system. It is consisted of the SMPS part, which supplies the DC power for driving the system, and the AC heater control part, which supplies the power to fuser. SMPS has two output channels. Which are 5V and +24V. • AC Input - Input Rated Voltage: AC 110V ~ 127V / AC 220V ~ 240V - Rated Frequency : 50/60 Hz • Rated Output Power NO ITEM CH1 1 CHANNEL NAME +5V 2 CONNECTOR PIN CON 3 5V PIN: 11,13 GND PIN: 12,14,16 3 Rated Output +5V ± 5% (4.75 ~ 5.25V) 4 Max. Output Current 3A 5 Peak Loading Current 3.6A 6 RIPPLE NOISE Voltage 100mVp-p 7 Maximum output 15W 8 Protection for loading Shut down or Fuse shortage and overflowing Protection current CH2 +24.0V CON 3 24V PIN:3,5,7,9 GND PIN:4,6,8,10 +24V ± 10% (21.6 ~ 26.4V) 4.0A 10.0A Under 500mVp-p 96W Shut down or Output Voltage Drop Remark 1ms ■ FUSER AC POWER CONTROL Fuser(HEAT LAMP) gets heat from AC power. The AV power controls the switch with the Triac, a semiconductor switch. The 'ON/OFF control' is operated when the gate of the Triac is turned on/off by Phototriac (insulting part). In other words, the AC control part is passive circuit, so it turns the heater on/off with taking signal from engine control part. • Triac feature : 16A-LV model / 12A-HV model, 600V SWITCHING • Phototriac Coupler (PC501) - Turn On If Current : 15mA ~ 50mA(Design: 16mA) - High Repetive Peak Off State Voltage : Min 600V 2-21 Service Manual

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Product spec and feature
2-21
Service Manual
■ SMPS (Switching Mode Power Supply)
It is the power source of entire system.
It is consisted of the SMPS part, which supplies the DC power for driving the system, and the AC heater
control part, which supplies the power to fuser. SMPS has two output channels. Which are 5V and +24V.
• AC Input
- Input Rated Voltage: AC 110V ~
127V / AC 220V ~ 240V
- Rated Frequency : 50/60 Hz
• Rated Output Power
NO
ITEM
CH1
CH2
Remark
1
CHANNEL NAME
+5V
+24.0V
2
CONNECTOR PIN
CON 3
5V PIN: 11,13
GND PIN: 12,14,16
CON 3
24V PIN:3,5,7,9
GND PIN:4,6,8,10
3
Rated Output
+5V ± 5%
(4.75 ~ 5.25V)
+24V ± 10%
(21.6 ~ 26.4V)
4
Max. Output Current
3A
4.0A
5
Peak Loading Current
3.6A
10.0A
1ms
6
RIPPLE NOISE Voltage
100mVp-p
Under 500mVp-p
7
Maximum output
15W
96W
8
Protection for loading
shortage and overflowing
current
Shut down or Fuse
Protection
Shut down or Output
Voltage Drop
■ FUSER AC POWER CONTROL
Fuser(HEAT LAMP) gets heat from AC power. The AV power controls the switch with the Triac, a
semiconductor switch. The ‘ON/OFF control’ is operated when the gate of the Triac is turned on/off by
Phototriac (insulting part).
In other words, the AC control part is passive circuit, so it turns the heater on/off with taking signal from
engine control part.
• Triac
feature :
16A-LV model / 12A-HV model, 600V SWITCHING
• Phototriac Coupler (PC501)
- Turn On If Current
: 15mA ~ 50mA(Design: 16mA)
- High Repetive Peak Off State Voltage : Min 600V