Ricoh FT7770 Service Manual page 104

30
April, '89
Corona Current Shift -
-
SC PP
OFF
S1 = CN208-B7, S2 = CN202-A16
Separation on Duplex Overlay 2nd Cycle:
The decreased water content increases
paper. For this reason, the corona is more effective and less negative bias
is needed. The CPU supplies LOW at CN202-A16 (S2) to shift the separa-
tion corona current.
Paper Application Switch ON:
When the paper application switch is turned on, the separation corona current
is shifted as discussed above.
paper and tracing paper.
Leak Detection:
If either the TC or SC develops a leak, the leak signal
receiving of this signal, the
CPU then turns
power pack is lit.
output S1 S2
H H
CPU indicates SC 14
off the transfer and separation power pack and the LED on the
Paper Application SW on, or
duplex/image overlay cycle.
Leading Edge
electrical resistivity of the
the
This switch should be used for translucent
2-48
goes LOW.
(High Voltage Leak). The
Upon