Ricoh Aficio BP20N, Руководство по обслуживанию

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SMPS AND HVPS
SM 6-21 G144/G145
Detailed
Des
cription
s
6.5.2 SMPS (SWITCHING MODE POWER SUPPLY)
The SMPS powers the entire system and is assembled by an independent module,
so it is possible to employ it for common use. It is mounted at the bottom of the set
and consists of the AMPS part, which supplies the DC power for driving the
system, and the AC heater control part, which supplies the power to fuser. The
SMPS has two output channels (3.3V and +24V):
1. AC Input
•
Input Rated voltage: AC 220V ~ 240V AC 120V / AC 220V (EXP version)
• Input Voltage range: AC 198V ~ 264V AC 90V ~ 135V / AC 198V ~ 264V (EXP
version)
•
Rated Frequency: 50/60 Hz
•
Frequency range: 47 ~ 63 Hz
•
Input Current: Under 4.0A/2.0A. (When the fuser lamp is off and input/output
voltages are in range)
2. Rated Output Power
No. Item CH1 CH2 CH3 Remark
1 Channel name +3.3V +5V +24V
2 Connector pin CON 3
3.3V Pin: 3,4
GND Pin: 5.6 CON 3
5V Pin: 8
GND Pin: 7 CON 3
24V Pin: 11-13
GND Pin: 9-10
3 Rated output 3.3 V ± 5%
(3.2-3.4 V) 5 V ± 5%
(4.75-5.25 V) 24 V ± 10%
(21.6-26.4 V)
4 Maximum output
current 1.0 A 0.14 A 2.0 A
5 Peak loading current 1.5 A 0.14 A 2.5 A 1 ms
6 Ripple noise voltage Less than 100
mV
100 mV Less than 500
mV
7 Maximum output 3.3 W 0.35 W 48 W
8 Peak output 4.95 W 0.7 W 60 W 1 ms
9 Overflow current
protection --- --- --- ---
3. Consumption Power
No. Item CH1-+3.3V CH2-+5V CH3-+24V Remark
1 Stand-by 1.0 A 0.07 A 0.4 A Ave: 55W
2 Printing 1.0 A 0.14 A 2.0 A Ave: 55W