Lexmark W820 Service Manual page 339

BD13 I/O PWB↔MCU PWB (2 of 7)
The following table shows the signal names for this BD:
Signal Name
MMOT$ON
DMOT$ON
DMOT$REF
FAN$LOW
TNR#EMP
FAN$FAIL
BD14 I/O PWB↔MCU PWB (3 of 7)
PWBA MCU(3/7)
4025-XXX
Description
Switches Main Motor. 5V=Off. 0V=On
Switches Developer Motor. 5V=Off. 0V=On
Control signal for the Developer Motor.
Switches Fuser Fan speed. 5V=Low speed. 0V=High speed
Signal from the Toner Sensor. 5V=Near empty. 0V=Level ok
Monitors Fuser Fan. 5V=Fan operation problem. 0V=Fan operation normal
P/J402
CRU$DATA
12
CRUM$PWR
13
STS##FSR1
15
STS##FSR1
16
SNR#FUT
17
SNR#STK
18
SOL#EGATE
19
OMOT$REV
20
OMOTSFWD
21
SNR#FEXIT
22
CL$RGATE
23
CL$FEED1
24
STS##FSR2
25
STS##FSR2
26
L/H$INTLK
28
CRU$CLK
29
DMOT#PHS
31
MMOT$PWM
32
MC#CLK
33
P/J403
SNR##SIZE1
13
SNR#LVL1
14
SNR#REGI
15
SNR#NOP1
20
PWBA I/O
P/J452
BLK
9
BLK
8
BLK
6
BLK
5
BLK
4
BLK
3
BLK
2
BLK
1
BLK
40
BLK
39
BLK
38
BLK
37
BLK
36
BLK
35
BLK
33
BLK
32
BLK
30
BLK
29
BLK
28
P/J453
BLK
5
BLK
4
BLK
3
BLK
32
Connector Locations
5-33