Interlock Circuit Diagram; The +24 Vdc Interlock Circuit; Figure 3-1 Circuit Diagram - Xerox Phaser 7700 Service Manual

Interlock Circuit Diagram

PRINT CARTRIDGE CRUM CONNECTORS
GRY
C
GRY
K
GRY
M
GRY
Y
GRY
WASTE CARTRIDGE
INTLK SW
GRY
GRY
GRY
ORN
ORN
FRONT COVER INTLK SW R/H COVER INTLK SW

Figure 3-1 Circuit Diagram

The +24 VDC Interlock Circuit

The 24 VDC Interlock Circuit runs from the 24 VDC LVPS to the L/H Door
Interlock Switch, the R/H Door Interlock Switch, and the Front Door Interlock
Switch back to the Engine Control Interface Board, then into the Engine Control
Board. Opening this circuit prevents the Laser Unit and the High-voltage Power
Supplies from operating.
1.
With all doors closed and printer power on, check for +24VDC between P535-2
of the Engine Control Interface Board and frame ground.
2.
If +24VDC is not present, see Troubleshooting the 24 VDC LVPS on page 3-89
to verify the 24 VDC LVPS is working.
3.
If working, then check the LH Cover Interlock Switch, the RH Cover Interlock
Switch and the Front Cover Interlock Switch.
3-90 Phaser 7700 Color Laser Printer
J631
GRY
1
P536
2
3
INTERFACE
4
BOARD
5
P537
6
LD
POWER
RELAY
1
3
7 6
5
GRY
GRY
ORN
ORN
LH COVER INTLK SW
GRY
5V
LVPS
VIO
24V
LVPS
VIO
S7700-432