Kyocera FS-1900 - High Voltage Unit

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FS-1900
(5) High voltage unit
High voltage unit contains main charger unit, transfer roller high voltage output circuit which
generates the developer bias. It also contains MP tray paper sensor and option feeder sensor.
PGND
Transfer bias
output
positive voltage
circuit
RTRCHON*
MCHON*
TRCHON*
TRVSEL3*
TRVSEL2*
TRVSEL1*
HVCLK
GND
+5V2
HUNIT*
HANDS*
+24V2
High voltage board
Main charger unit
Paper
Transfer roller
Developer
(Magnet roller)
High voltage output circuit
Sensor circuit
Control
and
driver
circuit
Control
and
driver
circuit
MP tray
MP tray
paper
sensor
Option
feeder
sensor
Driver
circuit
Engine board
Rectifier
circuit
Figure 4-3-16 High voltage unit circuit block diagram