Sharp MX-DEX6 Service Manual ▷ View online
MX-DEX6/DEX7 OUTSIDE VIEW AND INTERNAL STRUCTURE 4 – 1
MXDEX7
Service Manual
[4] OUTSIDE VIEW AND INTERNAL STRUCTURE
1. Part Names and Functions
A. Internal Structure
• MX-DEX6
• MX-DEX7
No.
Name
No.
Name
1
Take-up roller 1
5
Take-up roller 2
2
Paper feed roller 1
6
Paper feed roller 2
3
Separation roller 1
7
Separation roller 2
4
Vertical transport roller
8
Transport roller 1
9
Transport roller 2
2
1
8
3
5
4
6
9
9
7
2
1
8
3
3
MX-DEX6/DEX7 OUTSIDE VIEW AND INTERNAL STRUCTURE 4 – 2
B. Sensors and Switches
• MX-DEX6
• MX-DEX7
No.
Signal
Name
Type
Function/operation
Activation condition
1
DCSI1
Desk 1 attachment sensor
–
This sensor detects when desk 1 is attached.
The signal is Low level when the
desk is attached.
desk is attached.
2
DCSS11
Desk 1 rear edge switch 1
Tact switch
The paper feeder recognizes that the tray for desk 1
has been inserted when any of desk 1 rear edge
switches 1 to 4 turns ON.
This sensor detects the paper size of the tray in desk 1.
has been inserted when any of desk 1 rear edge
switches 1 to 4 turns ON.
This sensor detects the paper size of the tray in desk 1.
The signal becomes Low level when
any of the four switches is pressed.
any of the four switches is pressed.
3
DCSS12
Desk 1 rear edge switch 2
Tact switch
4
DCSS13
Desk 1 rear edge switch 3
Tact switch
5
DCSS14
Desk 1 rear edge switch 4
Tact switch
6
DCSI2
Desk 2 attachment sensor
–
This sensor detects when desk 2 is attached.
The signal is Low level when the
desk is attached.
desk is attached.
7
DCSS21
Desk 2 rear edge switch 1
Tact switch
The paper feeder recognizes that the tray for desk 2
has been inserted when any of desk 2 rear edge
switches 1 to 4 turns ON.
This sensor detects the paper size of the tray in desk 2.
has been inserted when any of desk 2 rear edge
switches 1 to 4 turns ON.
This sensor detects the paper size of the tray in desk 2.
The signal becomes Low level when
any of the four switches is pressed.
any of the four switches is pressed.
8
DCSS22
Desk 2 rear edge switch 2
Tact switch
9
DCSS23
Desk 2 rear edge switch 3
Tact switch
10
DCSS24
Desk 2 rear edge switch 4
Tact switch
11
DCSPD1
Desk 1 paper level sensor
Transmission
type
type
This sensor detects the amount of paper remaining in
desk 1.
desk 1.
The signal becomes Low level when
desk 1 is detected being empty.
desk 1 is detected being empty.
12
DCSPD2
Desk 2 paper level sensor
Transmission
type
type
This sensor detects the amount of paper remaining in
desk 2.
desk 2.
13
DSW_DSK
Right door open/close
sensor
sensor
Transmission
type
type
This sensor detects when the right door is opened or
closed.
closed.
The signal is Low level when the
cover is open.
cover is open.
14
DPFD1
Desk 1 transport sensor
Transmission
type
type
This sensor detects when paper is in the transport path
for desk 1.
for desk 1.
The signal is Low level when paper is
transported.
transported.
15
DPED1
Desk 1 paper presence
sensor
sensor
Transmission
type
type
This sensor detects when there is paper in desk 1.
The signal is Low level when there is
paper in desk 1.
paper in desk 1.
16
DLUD1
Desk 1 upper limit sensor
Transmission
type
type
This sensor detects when the tray in desk 1 reaches its
upper limit.
upper limit.
The signal is High level when the tray
in desk 1 is at its upper limit.
in desk 1 is at its upper limit.
17
DPFD2
Desk 2 transport sensor
Transmission
type
type
This sensor detects when paper is in the transport path
for desk 2.
for desk 2.
The signal is Low level when paper is
transported.
transported.
18
DPED2
Desk 2 paper presence
sensor
sensor
Transmission
type
type
This sensor detects when there is paper in desk 2.
The signal is Low level when there is
paper in desk 2.
paper in desk 2.
19
DLUD2
Desk 2 upper limit sensor
Transmission
type
type
This sensor detects when the tray in desk 2 reaches its
upper limit.
upper limit.
The signal is High level when the tray
in desk 2 is at its upper limit.
in desk 2 is at its upper limit.
3
2
2
1
16
11
13
14
4
5
15
3
2
1
4
5
8
7
2
1
4
5
8
7
6
9
10
16
11
13
14
12
15
17
19
18
12
15
17
19
18
MX-DEX6/DEX7 OUTSIDE VIEW AND INTERNAL STRUCTURE 4 – 3
C. Drive and Control Components
• MX-DEX6
• MX-DEX7
No.
Signal
Name
Type
Function/operation
Activation condition
1
DPFM
Desk main motor
DC brushless
motor
motor
This motor drives the paper feed and
transport sections.
transport sections.
The signal becomes High level when a Job
Start request is received; Low level when a
Job End request is received.
Start request is received; Low level when a
Job End request is received.
2
DTRC
Desk transport clutch
Electromagnetic
clutch
clutch
This clutch controls the ON/OFF status
of the vertical transport roller.
of the vertical transport roller.
The signal becomes High level when a paper
feed request is received.
feed request is received.
3
DPUC1
Desk 1 paper feed clutch
Electromagnetic
clutch
clutch
This clutch controls the ON/OFF status
of the paper feed roller 1.
of the paper feed roller 1.
The signal becomes High level when a paper
feed request is received.
feed request is received.
4
DPUC2
Desk 2 paper feed clutch
Electromagnetic
clutch
clutch
This clutch controls the ON/OFF status
of the paper feed roller 2.
of the paper feed roller 2.
The signal becomes High level when a paper
feed request is received.
feed request is received.
5
DLUM1
Desk 1 lift-up motor
DC brush motor
This motor lifts up the tray in desk 1.
The signal becomes High level when tray
insertion is detected; Low level when the
upper limit sensor (DLUD1) turns ON.
insertion is detected; Low level when the
upper limit sensor (DLUD1) turns ON.
6
DLUM2
Desk 2 lift-up motor
DC brush motor
This motor lifts up the tray in desk 2.
The signal becomes High level when tray
insertion is detected; Low level when the
upper limit sensor (DLUD2) turns ON.
insertion is detected; Low level when the
upper limit sensor (DLUD2) turns ON.
7
–
Desk control PWB
–
This PWB controls and drives the desk.
–
8
–
Desk 1 size detection PWB
–
Detects the paper size.
–
9
–
Desk 2 size detection PWB
–
Detects the paper size.
–
10
–
Desk heater (Service parts (kit):
When installing, refer to [11].)
When installing, refer to [11].)
–
This heater is used to keep warm the
Desk interior.
Desk interior.
–
10
7
8
1
3
2
5
10
7
8
9
1
3
4
2
6
5
MX-DEX6/DEX7 OPERATIONAL DESCRIPTIONS 5 – 1
MXDEX7
Service Manual
[5] OPERATIONAL DESCRIPTIONS
1. Lift Operation
After the tray has been inserted, the lift motor turns ON, and the tray is lifted to and stops at a position where it can feed paper with the upper
limit sensor (DLUD) turned ON.
The lift-up motor output is as shown below:
limit sensor (DLUD) turned ON.
The lift-up motor output is as shown below:
2. Paper Feed Operation
Paper feed operation can be performed if the tray is stationary at a position where it can feed paper (with the upper limit sensor [DLUD] being
ON) and there is paper in the tray.
When paper feed takes place, the transport motor (DPFM), the transport clutch (DTRC), and the paper feed clutch (DPUC) operate in the tim-
ings shown in the diagrams below.
In addition, there are times when the paper feeder speeds up paper feed by performing "turbo" paper feed in the desk so that it can meet the
CPM conditions required by the main unit.
ON) and there is paper in the tray.
When paper feed takes place, the transport motor (DPFM), the transport clutch (DTRC), and the paper feed clutch (DPUC) operate in the tim-
ings shown in the diagrams below.
In addition, there are times when the paper feeder speeds up paper feed by performing "turbo" paper feed in the desk so that it can meet the
CPM conditions required by the main unit.
Start lift-up
Finish lift-up
DLUM
(motor output)
DLUD
(upper limit sensor)
Job start request received
Job end request
received
Preliminary paper feed request received
DPFM
(transport motor output)
DTRC
(transportclutch)
DPUC1
(paper feed clutch)
DPFD1
(transport sensor)
TRC
(mainunitsynchroni-
zationsignal)
Resist synchronization
Paper feed clutch
ON control
Paper feed clutch
OFF control
[Without "turbo" paper feed]
Job end request
received
Preliminary paper feed request received
Acceleration
Deceleration
Deceleration
Acceleration timing control
Resist synchronization
[With "turbo" paper feed]
Job start request received
DPFM
(transport motor output)
DTRC
(transport clutch)
DPUC1
(paper feed clutch)
DPFD1
(transport sensor)
TRC
(mainunit synchroni-
zation signal)
Paper feed clutch
OFF control
Paper feed clutch
ONcontrol
Deceleration timing
control
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