Read Sharp MX-DEX2 (serv.man2) Service Manual online
MX-DEX1/DEX2 OPERATIONAL DESCRIPTIONS 5 – 1
Service Manual
[5] OPERATIONAL DESCRIPTIONS
1. Lift Operation
After the tray has been inserted, the lift motor is turned ON, and the tray is lifted to and stopped 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:
upper 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
(transport clutch)
DPUC1
(paper feed clutch)
DPFD1
(transport sensor)
TRC
(main unit synchroni-
zation signal)
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
(main unit synchroni-
zation signal)
Paper feed clutch
OFF control
Paper feed clutch
ON control
Deceleration timing
control
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