Controlling The External/Internal Static Eliminating Current; Operation - Canon CLC 1120 Service Manual

E. Controlling the External/Internal Static Eliminating Current

1. Operation

The external/internal static eliminating control mechanism has the following items of control:
1. Controlling the static eliminating current to a specific level.
2. Turning on/off the high-voltage output.
Each of the signals is used for the following:
[1] HVIOC (external/internal static eliminating current AC component ON/OFF control
signal)
When '1', the static eliminating current AC component output is ready.
[2] HVIDCC (internal static eliminating current DC component ON/OF control signal)
When '1', the static eliminating current DC component output is ready.
[3] HVIDCI (internal static eliminating current DC component level control signal)
Controlled to +3 to +11 V; at +11 V, the high-voltage output is generated.
For related error codes, see D. "Controlling the Separation Charging Current."
DC driver PCB
J1012
-B5
-B7
-B6
COPYRIGHT © 1999 CANON INC.
[1]
HVIOC
[3]
HVIDCC
[2]
HVIDCI
Figure 6-305
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 6 IMAGE FORMATION SYSTEM
HVT-AC PCB
T102
J421
-9
-7
-8
External static
eliminating charge
T102
Internal static
eliminating charge
6-23