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2DC
2-3-5 High voltage board
The high voltage board contains the high voltage output circuit, interlock switch circuit as well as providing a liaison
connection with the power supply board, bias board, and the engine board.
Engine board
Bias board
+24V3
FET
+24V2
2-3-10
Control
and
MHVDR
driver
circuit
THVDR,
RTHVDR
Control
PSEL1,
and
PSEL2
driver
circuit
HVISEL
+24V2
+5V
Figure 2-3-9 High voltage board circuit block diagram
High voltage board
High voltage output circuit
Transfer bias
output
positive voltage
circuit
Interlock switch
Main
charger
Transfer
roller
Power supply board
+24V2
+24V1
FAN,
HEATN, SLEEPN
ZCROSS,
THERM, EXITN
+5V
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