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MX-DE21 OPERATIONAL DESCRIPTIONS 4 – 1
MX-DE21
Service Manual
[4] OPERATIONAL DESCRIPTIONS
1. Electrical and mechanical relation diagram
A. Paper feed tray 3,4
Signal
name
Name
Function/Operation
DCDT
Tandem tray installation detector
Detects installation of tandem tray.
D2PQD
Tray 4 remaining quantity detector
Detects the remaining paper quantity in tray 4.
D1PQD
Tray 3 remaining quantity detector
Detects the remaining paper quantity in tray 3.
D2LUD
Tray 4 upper edge detector 1
Either of upper edge 1 - 4 of tray 4 is detected to detect tray insertion.
The paper size of tray 4 is detected.
The paper size of tray 4 is detected.
D1LUD
Tray 3 upper edge detector 1
Either of upper edge 1 - 4 of tray 3 is detected to detect tray insertion.
The paper size of tray 3 is detected.
The paper size of tray 3 is detected.
D2LM
Paper tray lift motor (Tray 4)
Drives the lift of the paper tray.
D1LM
Paper tray lift motor (Tray 3)
Drives the lift of the paper tray.
D2PED
Tray 4 paper empty detector
Detects paper presence in tray 4.
D1PED
Tray 3 paper empty detector
Detects paper presence in tray 3.
DPFM
Desk feed motor
Drives the paper feed section.
D2PFC
Tray 4 paper feed clutch
Controls ON/OFF of the paper feed roller in the tray 4 paper feed section.
D1PFC
Tray 3 paper feed clutch
Controls ON/OFF of the paper feed roller in the tray 3 paper feed section.
DSW-TD
Right door open/close detector
Detects whether the right door is opened or not. .
No.
Name
Function/Operation
1
Paper pickup roller (Paper feed tray 3)
Picks up paper to send to the paper feed roller.
2
Paper feed roller (Paper feed tray 3)
Feeds paper to the paper transport section.
3
Separation roller (Paper feed tray 3)
Separates paper to prevent double-feeding.
4
Paper pickup roller (Paper feed tray 4)
Picks up paper to send to the paper feed roller.
5
Paper feed roller (Paper feed tray 4)
Feeds paper to the paper transport section.
6
Separation roller (Paper feed tray 4)
Separates paper to prevent double-feeding.
7
Torque limiter
Applies a certain level of resistance power to rotation of the separation roller in order to prevent
against double feed.
against double feed.
D1LM
D2LM
D1PFC
D2PFC
D1LUD
1
2
3
SPD3
D1PQD
D2PQD
DCDT
D1PED
D2LUD
DPE
D2PED
DPFM
4
5
6
7
7
D2PED
+5V
GND
D2LUD
P
AP-04V
-S
1
2
3
4
179228-3
D2PQD
3
GND
2
+5V
1
GND
2
+5V
179228-3
3
1
DCDT
D1LM
PHR-2
1
2
GND
D2LM
2
PHR-2
1
GND
DPFM-T
/DPFM-CLK
+24V
/DPFM-EN
B9B-PH-K-S
CN-D
+5V
GND
D1PQD
D1LUD
GND
+5V
D1PED
3
2
6
5
4
B13B-PH-K-S
CN-I
1
7
3
D1PQD
1
2
179228-3
+5V
GND
D1LUD
GND
+5V
4
D1PED
3
2
1
P
AP-04V
-S
+24V
8
6
B9B-PH-K-S
B10B-PH-K-S
CN-G
CN-D
CN-F
CN-E
D2PFC
D1PFC
2
8
7
3
+24V
D2LM
GND
D1LM
9
B12B-PH-K-S
5
GND
1
4
2
3
/DPFM-CLK
DPFM-T
/DPFM-EN
PHR-5
1
2
3
4
5
GND
+24V
10
11
12
+5V
DCDT
GND
GND
GND
B7B-PH-K-S
+5V
+5V
D2PED
D2PQD
1
2
6
4
5
D2LUD
3
7
7
GND
B9B-PH-K-S
CN-D
2
1
1
2
1
2
1
2
SMP-02V
-NC
SMR-02V
-N
TAN MAIN PWB
TAN MAIN PWB
SMP-02V
-NC
SMR-02V
-N
+5V
2
GND
179228-3
3
3
DSW
-TD
CN-H
@@@@@@
3
2
1
GND
DSW
-TD
+5V
DSW-TD
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