High Voltage Pwb - Kyocera KM-1820 Service Manual

2GM

2-3-5 High voltage PWB

The high voltage PWB contains the high voltage output circuit, interlock switch circuit as well as providing a liaison
connection with the power supply PWB, bias PWB, and the engine PWB.
Engine PWB
Bias PWB
+24V3
FET
+24V2
2-3-20
Control
and
MHVDR1,2
driver
circuit
THVDR,
RTHVDR
Control
and
PSEL1
driver
circuit
HVISEL
+24V2
+5V
Figure 2-3-13 High voltage PWB circuit block diagram
SW1
T201
Figure 2-3-14 High voltage PWB silk-screen diagram
High voltage PWB
High voltage output circuit
Transfer bias
output
positive voltage
circuit
Interlock switch
YC3
YC1
T101
Main
charger
Transfer
roller
Power supply PWB
+24V2
+24V1
FAN,
HEATN, SLEEPN
ZCROSS,
THERM, EXITN
+5V