Read Sharp MX-DEX2 (serv.man7) Service Manual online
MX-DEX1/DEX2 OPERATIONAL DESCRIPTIONS 5 – 2
3. "Turbo" Paper Feed Operation
A. When paper is fed from the upper tray:
B. When paper is fed from the lower tray:
When paper is fed from the lower tray, the paper feeder performs basically the same procedure as described above: it speeds up the transport
motor when the trailing edge of the first sheet passes the desk roller; and slows down the transport motor based on the timing in which DPFD1
turns ON detecting the next sheet.
motor when the trailing edge of the first sheet passes the desk roller; and slows down the transport motor based on the timing in which DPFD1
turns ON detecting the next sheet.
4. Paper Presence Detection
The paper presence sensor (DPED) checks whether there is paper in the tray when the tray is lifted and stopped at a position where it can feed
paper, as well as during paper feed operation.
paper, as well as during paper feed operation.
5. Paper Size Detection in Each Paper
Feed Tray
The size of paper contained in each tray is detected based on the
status of each of desk rear edge detectors (switches) 1 to 4 as well
as on the destination-specific settings.
status of each of desk rear edge detectors (switches) 1 to 4 as well
as on the destination-specific settings.
<A/B sizes>
{
: ON ✕: OFF
<Inch-based sizes>
{
: ON ✕: OFF
Trailing edge of sheet
passes the desk roller.
Transport speed
(High)
Fetched into the main unit
(Process speed)
DPFD1 on
Transport speed
(High)
Deceleration to the Process
speed completes before the
sheet reaches the preliminary
paper feed stop position.
speed completes before the
sheet reaches the preliminary
paper feed stop position.
Transport speed
(Process speed)
Sheet-to-sheet
distance
distance
Transport speed
(High)
Deceleration to the Process
speed completes before the
sheet reaches the preliminary
paper feed stop position.
speed completes before the
sheet reaches the preliminary
paper feed stop position.
Transport speed
(Process speed)
The paper feeder starts feeding the first
sheet, transporting it at the High speed.
sheet, transporting it at the High speed.
When the trailing edge of the sheet has passed
the desk roller, the paper feeder speeds up the
transport motor to thereby transport the next
sheet at the High speed.
the desk roller, the paper feeder speeds up the
transport motor to thereby transport the next
sheet at the High speed.
The paper feeder detects the distance
between the first and second sheets based on
the timings in which the transport sensor
DPFD1 turns ON.
between the first and second sheets based on
the timings in which the transport sensor
DPFD1 turns ON.
The paper feeder adjusts the sheet-to-sheet
distance by altering the deceleration timing
according to the current distance between the first
and second sheets, provided that deceleration be
completed before the sheet reaches preliminary
paper feed stop position.
distance by altering the deceleration timing
according to the current distance between the first
and second sheets, provided that deceleration be
completed before the sheet reaches preliminary
paper feed stop position.
Transport speed
(Process speed)
The paper feeder starts feeding the second sheet,
transporting it at the Process speed since the first
sheet is currently in transit from the desk to the
main unit.
transporting it at the Process speed since the first
sheet is currently in transit from the desk to the
main unit.
The transport slows down to the Process speed
before the sheet reaches the preliminary paper
feed stop position.
before the sheet reaches the preliminary paper
feed stop position.
1
4
5
2
3
6
DCSS12
DCSS22
DCSS22
DCSS11
DCSS21
DCSS21
DCSS13
DCSS23
DCSS23
DCSS14
DCSS24
DCSS24
Rear edge detection switches
1
2
3
4
A3
✕
{
✕
{
A4
{
{
✕
{
A4R
{
{
{
✕
B4
✕
{
{
{
B5
{
{
✕
✕
B5R
{
✕
✕
{
{
✕
{
{
8.5 x 13
✕
{
{
✕
Rear edge detection switches
1
2
3
4
11 x 17
✕
{
✕
{
8.5 x 11
{
{
✕
{
8.5 x 14
✕
{
{
{
7.25 x 10.5R
{
✕
✕
{
{
✕
{
{
8.5 x 11R
{
✕
{
✕
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