Lexmark W812 - Engine Board <-> Printhead and Toner Cartridge (3;3)

5-24 Service Manual
4022-XXX
Engine Board <−> Printhead and Toner Cartridge (3/3)
• Safety switch functions of toner cartridge LD +5V
The toner cartridge contains the power circuit for LD +5V. The LD +5V circuit is
established by inserting the toner cartridge. If the toner cartridge is not attached to the
printer, the LD +5V circuit is opened, and the radiation of laser beams stops.
CAUTION: The LD +5V power circuit of the toner cartridge is a safety switch function for
laser beams. To prevent you from being exposed to laser beams, do not short this circuit.
If laser beams enter the eyes directly, the eyes may be injured or you may lose your sight.
Engine Board <−> HVPS <−> Toner Cartridge (BCR and
Mag. Roll), Transfer Roller and Detack Saw (1/3)
ENGINE
BOARD
P/J13
DBAC
DBDC CON
CRAC CLK
CRAC
DTS MON
N.C.
DTS CON
TR CON
N.C.
TR MON
N.C.
/TR(-)
1
3
5
7
8
10
11
12
13
14
15
16
17
18
19
20
24V RTN
24V
LG
3.3V
/CRDC
P/J29
1
2
3
4
5
6
SG
5V
CRUM CLK
CRUM DATA
P/J131
20
18
16
14
13
12
11
10
HVPS
DB
DB
CR
CR
DTS
JP004
JP003
JP002
DB
CR
FG
JP001
P/J135
P/J1351
TR
P/J136
TR
9
8
7
6
5
4
3
2
1
J292
6
5
4
3
2
1
SG
5V
CRUM CLK
CRUM DATA
P293
BTR
P/J1361
Drum
BCR
Mag.
Roll
Detack Saw
TONER
CARTRIDGE
9
6
5
4
3
2
1
6
5
4
3
2
1