Phaser 3300MFP Service Manual 2-29
Theory of Operation
■ Input Voltage: 24 V DC ± 15%
■ Output Voltage: -200 V ~ -600 V DC +20 V
■ Output Voltage Fluctuation range: PWM Control
■ Input contrast of the output stability degree: ± 5% or less Loading
contrast: ± 5% or less
■ Output Voltage Rising Time: 50 ms Max
■ Output Voltage Falling Time: 50 ms Max
■ Output Loading range: 10 ΜΩ ~ 1000 ΜΩ
■ Output Control Signal (BIAS-PWM): the CPU output is HV output
when PWM is low.
■ Supply
■ Output Voltage: -400 V ~ -800 V DC ± 50 V (ZENER using, DEV)
■ Input contrast of the output stability degree: under + 5% Loading
contrast: ± 5% or less
■ Output Voltage Rising Time: 50 ms Max
■ Output Voltage Falling Time: 50 ms Max
■ Output Loading range: 10 ΜΩ ~ 1000 ΜΩ
■ Output Control Signal (BIAS-PWM): the CPU is HV output when
PWM is low.
2) SMPS (Switching Mode Power Supply)
It is the power source of entire system. It is assembled by an independent
module, so it is possible to use for common use. It is mounted at the side of
the set.
It consists 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 +5 V and +24 V.
■ AC Input
■ Input Rated Voltage: AC 220 V ~ 240 V AC 110 V ~ 127 V
■ Input Voltage fluctuating range: AC 198 V ~ 264 V AC 99 V ~ 135 V
OPC -130±15.4%
MHV -1350±3%
DEV -430±3%
Supply -630±3%
THV +1300±3%
-1200±3%
s3300mfp-159
CN4
CN5
CN6
CN1
Switch
Front Cover
Switch
Duplex Sensor
Regi Sensor
Paper Feed Sensor
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