Gestetner A294 Service Manual page 90

DRUM UNIT
V Adjustment
G
The potential on unexposed areas of the drum (V
life. To keep V constant, the grid voltage (V
D
initial setting.
The BCU checks V
range (–900 V ± 20 V), the BCU adjusts V
charge/bias/grid power pack to get the correct target voltage.
The most recently detected values can be displayed with SP3-902-2 (V
902-4 (V ).
G
If the CPU cannot get V
value stored in SP2-001-01 and LD power is set to the value stored in SP2-103.
Then SC312, SC313, or SC315 is logged.
A294/A295
CÓPIA NÃO CONTROLADA
using the drum potential sensor [A]. If it is not within the target
D
within the target range by changing V
D
2-40
CÓPIA NÃO CONTROLADA
Charge/Bias/Grid
P.P
B C U
[A]
A294D642.WMF
) gradually changes during drum
D
) is adjusted during process control
G
(Grid Voltage) through the
G
) and 3-
D
, V is set to the
G G
SM