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Phaser 7700 Color Laser Printer Service Manual
3-91
Interlock 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 +24 VDC between
P535-2 of the Engine Control Interface Board and frame ground.
2.
If +24 VDC is not present, see Troubleshooting the +24 VDC LVPS on
page 3-90 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.
Figure 3-1 Circuit Diagram
PRINT CARTRIDGE CRUM CONNECTORS
WASTE CARTRIDGE
INTLK SW
FRONT COVER INTLK SW
R/H COVER INTLK SW
LH COVER INTLK SW
LVPS
LVPS
INTERFACE
BOARD
C
K
M
Y
GRY
GRY
GRY
GRY
GRY
GRY
GRY
GRY
ORN
ORN
ORN
ORN
GRY
GRY
GRY
VIO
VIO
GRY
LD
POWER
RELAY
24V
5V
P536
P537
J631
1
1
2
3
3
4
5
5
6
6
7
S7700-432
Содержание 7700DX - Phaser Color Laser Printer
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