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FS-1010
(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.
Figure 4-3-10 High voltage board circuit block diagram
Control
and
driver
circuit
Transfer bias
output
positive voltage
circuit
MHVDR
THVDR,
RTHVDR
PSEL1,
PSEL2
HVISEL
+24V2
+24V2
+24V1
+5V
+5V
ZCROSS,
THERM, EXITN
Interlock switch
High voltage board
Bias board
Power supply board
Engine board
Main
charger
Transfer
roller
High voltage output circuit
FAN,
HEATN, SLEEP
Control
and
driver
circuit