Read Sharp MX-1800N (serv.man25) Service Manual online
MX-1800N TRAY PAPER FEED SECTION E – 1
MX-1800N
Service Manual
[E] TRAY PAPER FEED SECTION
1. Electrical and mechanism relation diagram
PHNR-12-H+
P
DF1B-24p
S
CN6
BU12P-TR-P-H
B24B-PHDSS-B
CN4
S4P-PH-K-S
S4P-PH-K-S
PHNR-9-H+
BU09P-TR-P-H
B30B-PHDSS-B
5VNPD
3
D-GND
1
2
C
PED2
14
CPWD22
14
CPWD22
24
4
6
10
12
CPWD21
12
10
CSPD2
4
CLUD2
20
22
24
2
19
21
23
18
7
16
17
9
11
13
15
22
CSS23
6
CPED2
24
CSS24
2
CPFD2
18
CSS21
20
CSS22
21
CSS13
23
CSS14
17
CSS11
19
CSS12
15
CSS1
16
CSS2
11
CPWD11
13
CPWD12
7
DSW_R
9
CSPD1
18
CSS24
22
CPWD21
6
CPED2
8
CSPD2
4
CLUD2
17
CSS13
13
CSS11
15
CSS12
11
CSS1
10
CSS2
7
DSW_R
9
CSPD1
2
CPFD2
19
CSS14
12
CSS21
14
CSS22
16
CSS23
21
CPWD11
23
CPWD12
5VNPD
26
11
D-GND
9
D-GND
2
18
5VN
2
1
5VNPD
5VNPD
23
19
D-GND
3
5VN
2
0
D-GND
1
D-GND
D-GND
5
5VNPD
22
D-GND
8
D-GND
6
5VN
24
D-GND
7
10
11
12
D-GND
1
2
3
D-GND
4
5VNPD
5VNPD
10
7
D-GND
6
3
4
5
D-GND
CPED2
CPFD2
CLUD2
CSPD1
5VN
2
8
9
D-GND
1
1
3
9
2
5VN
3
1
2
D-GND
1
D-GND
1
D
-GND
3
D-GND
5VNPD
1
2
C
SPD2
D-GND
DSW_R
5VN
D-GND
3
2
1
D-GND
CPFD1
5VN
D-GND
6
8
7
5
4
12
4
9
1
D-GND
3
5
6
11
CPED1
5VNPD
CLUD1
2
10
9
5VNPD
5VN
3
CPFD2
2
1
2
3
D-GND
CPED1
5VNPD
1
2
D-GND
CPFD1
7
1
CPFD1
3
CLUD1
1
3
1
CPFD1
8
5
CPED1
5
3
CLUD1
5
CPED1
6
8
7
DRIVER MAIN PWB
5VNPD
5
4
5VNPD
5VNPD
25
PCU
2
5VN
3
D-GND
1
2
DSW_R
CSS1
CSS2
5VNPD
3
D-GND
1
2C
L
U
D
2
1
2
3
D-GND
CLUD1
5VNPD
CN17
B7P-PH-K-S
PHNR-2-H
BU02P-TR-P-H
PHNR-2-H
BU02P-TR-P-H
PHNR-2-H
BU02P-TR-P-H
R
SM18P
P
B32B-PHDSS-B
CN9
B2P-PH-K-S
3
INT24V2
B3P-PH-K-S
B2P-PH-K-S
P-GND
8
/CLUM2
/CPUC1
6
/CLUM1
14
15
15
/CLUM2
16
9
24V3
12
24V3
11
/CPFC
10
2
CPFM_LD
8
24V3
8
5
7
/CPFC
7
P-GND
4
/CPFM_CK
/CPFM_D
5
3
/CPFM_CK
3
4
/CPFM_D
4
5
CPFM_LD
9
/CPUC1
9
24V3
10
10
P-GND
/CLUM1
P-GND
14
15
15
16
7
P-GND
13
14
13
11
/CPUC2
24V3
2
1
2
1
/CPUC2
11
24V3
12
1
INT24V2
1
1
2
P-GND
2
12
13
2
/CPUC1
24V3
/CPFC
1
2
24V3
1
1
2
2
/CPUC2
24V3
1
1
2
P-GND
/CLUM2
1
2
P-GND
/CLUM1
1
2
3
4
5
6
7
INT24V2
P-GND
FG-OUT
/CPFM_CK
/CPFM_D
CPFM_LD
5V
PCU PWB
AC PWB
CPED1
1
2
4
CLUD1
CLUD2
CPFD1
DSW_R
CPFM CPUC1
CPFC
CLUM1
CLUM2
CPUC2
CPFD2
CPED2
CSS2
CSPD2
CSS1
CSPD1
3
5
6
7
8
10
9
11
11
MX-1800N TRAY PAPER FEED SECTION E – 2
Signal name
Name
Function/Operation
CLUD1
Tray 1 upper limit detection (Lift HP detection)
Tray 1 upper limit detection
CLUD2
Tray 2 upper limit detection (Lift HP detection)
Tray 2 upper limit detection
CLUM1
Paper tray lift-up motor (Paper feed tray 1)
Drives the paper tray lift plate.
CLUM2
Paper tray lift-up motor (Paper feed tray 2)
Drives the paper tray lift plate.
CPED 1
Tray 1 paper empty detection
Tray 1 paper empty detection
CPED 2
Tray 2 paper empty detection
Tray 2 paper empty detection
CPFC
Tray vertical transport clutch
CPFD1
Tray 1 transport detection (Paper entry detection)
Tray 1 paper pass detection
CPFD2
Tray 2 transport detection (Paper entry detection)
Tray2 paper pass detection
CPFM
Paper feed motor
Paper feed section drive
CPUC1
Paper feed clutch (Paper feed tray 1)
Controls the paper feed tray section roller ON/OFF.
CPUC2
Paper feed clutch (Paper feed tray 2)
Controls the paper feed tray section roller ON/OFF.
CSPD1
Tray 1 paper remaining quantity detection
Tray 1 paper remaining quantity detection
CSPD2
Tray 2 paper remaining quantity detection
Tray 2 paper remaining quantity detection
CSS1
Tray 1 presence detection
Detects the presence of the tray 1
CSS2
Tray 2 presence detection
Detects the presence of the tray 2
DSW_C
Tray 1, 2 transfer cover open/close detection
Detects opening of the tray 1, 2 transport cover.
No.
Name
Function/Operation
1
Paper feed roller (No.1 paper feed tray)
Feeds paper to the paper transport section.
2
Paper pickup roller (No. 1 paper feed tray)
Feeds paper to the paper feed roller.
3
Separation roller (No. 1 paper feed tray)
Separates paper to prevent Double Feed.
4
Torque limiter
A certain level of resistance force is supplied to the rotation of the separation
roller to prevent double feed.
roller to prevent double feed.
5
Paper feed roller (No. 1 paper feed tray)
Feeds paper to the paper transport section.
6
Paper pickup roller (No. 2 paper feed tray)
Feeds paper to the paper feed roller.
7
Separation roller (No. 2 paper feed tray)
Separates paper to prevent Double Feed.
8
Transport roller 4 (Drive)
Transports the paper transported from the transport roller 1 and paper feed roller
(No. 2 paper feed tray) to the transport roller 7.
(No. 2 paper feed tray) to the transport roller 7.
9
Transport roller 5 (Drive)
Transports the paper fed from the paper tray 1 to the transport roller 7.
10
Transport roller 7 (Drive)
Transports the paper fed from the paper feed tray 1, 2 or 3, 4 to the transport
roller 8.
roller 8.
11
Rotation plate
Lifts up the paper to keep the paper feed position.
MX-1800N TRAY PAPER FEED SECTION E – 3
2. Operational descriptions
A. Preliminary operation before paper feed
• When the paper is set and the paper feed tray is inserted, the
pickup roller moves down and the paper feed tray sensor turns
ON.
ON.
• The lift-up motor operates to lift the rotating plate.
• The paper upper limit sensor turns on to stop the rotating plate at
• The paper upper limit sensor turns on to stop the rotating plate at
the specified position.
B. Paper feed operation
• When copy/print operation is started, the motor and the clutch
are turned ON and the pickup roller is rotated in the paper pickup
timing to feed paper.
timing to feed paper.
• At the same time, the paper feed roller rotates to feed paper to
the transport section. At that time, the separation roller rotates to
prevent against double feed of paper.
prevent against double feed of paper.
C. Remaining paper detection
• Remaining paper detection is performed according to four
stages, i.e. three stages with paper and one stage with no paper,
and the result is displayed.
and the result is displayed.
D. Remaining paper detection method
• The number of remaining sheets is determined according to the
number of times the remaining paper sensor changes from the
time the paper feed tray starts lifting up to the time when the
upper detection sensor comes ON.
time the paper feed tray starts lifting up to the time when the
upper detection sensor comes ON.
The no-paper detection sensor detects
the state of no remaining paper.
the state of no remaining paper.
1/3 Field
Sensor logic: Low
Sensor logic: Low
2/3 Field
Sensor logic: Hi
Sensor logic: Hi
3/3 Field
Sensor logic: Low
Sensor logic: Low
During no-paper detection
Remaining paper 1/3 position
Remaining paper 2/3 position
Remaining paper 1/3 position
Turn plate
CPED
(paper sensor)
(paper sensor)
Remaining Paper
Detection Actuator
Detection Actuator
CSPD
(remaining paper detection)
(remaining paper detection)
(Figure showing state transition of the remaining paper detection sensor during tray elevation and
changes in status according to the number of remaining sheets)
MX-1800N TRAY PAPER FEED SECTION E – 4
3. Disassembly and assembly
A. Tray paper feed section
(1) Remove the tray paper feed unit 1 and 2.
1)
Remove the right cabinet front.
2)
Remove the tray 1 and 2.
3)
Remove the right lower door unit.
4)
Remove the paper feed movable PG lower.
5)
Remove the paper feed unit 1, 2.
Unit
Parts
Maintenance
(1)
Tray paper
feed unit 1, 2
feed unit 1, 2
a
Paper pickup roller
{
b
Paper feed roller
{
c
Separation roller
{
d
Tray 1 transport cover
detection
detection
e
Transport roller 7 (Drive)
{
f
Transport roller 4 (Drive)
{
g
Torque limiter
h
Tray 1, 2 paper presence
detection
detection
i
Tray 1, 2 upper limit detection
j
Tray 1, 2 transport detection
k
Transport roller 5 (Drive)
{
(2)
Others
a
Tray 1, 2 paper remaining
quantity detection
quantity detection
b
Tray 1, 2 presence detection
(1)
(1)
(1)-a
(1)-b
(1)-c
(1)-j
(1)-g
(1)-e
(1)-d
(1)-k
(1)-a
(1)-h
(1)-i
(1)-c
(1)-b
(1)-j
(1)-g
(1)-f
(1)-h
(1)-i
(2)-b
(2)-a
1
2
