Sharp MX-6500N / MX-7500N (serv.man27) Service Manual ▷ View online
MX-7500N OPERATIONAL DESCRIPTIONS 13 – 17
b. Paper feed operation
- When copy/print operation is started, the motor and the clutch are
turned ON to rotate the pickup roller in the paper pickup timing,
feeding paper.
feeding paper.
- At the same time, the paper feed roller rotates to transport paper
to the transport section. At that time, the separation roller rotates
to prevent against double feed of paper.
to prevent against double feed of paper.
c. Paper remaining detection
- The notifying levels of paper remaining quantity are 4 steps in
total; 3 steps of paper remaining quantity and 1 step of paper
empty. The result is displayed.
empty. The result is displayed.
d. Paper remaining quantity detection method
- The paper remaining quantity is judged from the number of rota-
tions of the remaining quantity sensor from starting the lift-up
operation of the paper feed tray to turning ON the upper limit
sensor.
operation of the paper feed tray to turning ON the upper limit
sensor.
The no-paper detection sensor detects
the state of no remaining paper.
the state of no remaining paper.
During no-paper detection
1/3 Field
Sensor logic: Low
Sensor logic: Low
Remaining paper 1/3 position
Remaining paper 2/3 position
Remaining paper 3/3 position
2/3 Field
Sensor logic: Hi
Sensor logic: Hi
3/3 Field
Sensor logic: Low
Sensor logic: Low
CPED
(paper sensor)
(paper sensor)
Remaining Paper
Detection Actuator
Detection Actuator
Turn plate
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)
changes in status according to the number of remaining sheets)
MX-7500N OPERATIONAL DESCRIPTIONS 13 – 18
5. Paper transport section
A. Electrical and mechanical relation diagram
(1)
Interface pass unit
Signal name
Name
Function/Operation
CPFM
Paper feed motor
Drives the paper feed section.
T1PPD1
Tandem tray 1 transport sensor 1
Detects paper entry from tandem tray 1.
T1PPD2
Tandem tray 1 transport sensor 2
Detects paper pass from tandem tray 1.
TTRC
Tandem tray transport clutch
Controls ON/OFF of transport rollers 6/7.
No.
Name
Function/Operation
1
Transport roller 6 (Drive)
Transports paper from the tandem tray 1 to the transport roller 7.
2
Transport roller 7 (Drive)
Transports paper from the transport roller 6 to the transport roller 13.
#0&-
400$
442#
400$
0#5
#
5
7
"
6(2
.
0!0
6
3
0.$0
6
:
.#
.#
.#
.#
""
6(
0
'.$
).46,
""
0
!3+
#0&-?'!).
#0&-?#7#
#7
$
'.$
#0&-?$
6.
#0&-?#+
#0&-?,$
).46,
0
'.$
#.
#0&-?,$
#0&-?$
#0&-?#+
#0&-?'!).
6.
#0&-?#7#
#7
%&-?#.4
%&
-?6
'.$
%&-?,$
'.$
""
0.$:3
"50
42
0
(
0(.2
(
0(.2
(
44
2
#
6
44
2
#
6
#.
""
0.$:3
0.$0
6
:
#.
'.$
'.$
6.0$
6.0$
400$
400$
""
0.$:3
6.0$
400$
'.$
6.0$
400$
'.$
3-2
6
.#3-0
6
.
'.$
'.$
6.0$
6.0$
400$
400$
MX-7500N OPERATIONAL DESCRIPTIONS 13 – 19
(2)
Vertical transport unit
Signal name
Name
Function/Operation
CPFM
Paper feed/Transport motor
Drives the paper feed section and the transport section.
DSW_CS
Transport cover open/close sensor
Detects open/close of the vertical transport cover.
DSW_RL
Right lower door open/close sensor
Detects open/close of the right lower door.
PTRC2
Paper feed vertical transport clutch upper
Controls ON/OFF of the paper transport roller in the paper feed tray section.
T2PPD1
Tandem tray 2 transport sensor
Detects the tandem tray 2 paper pass.
No.
Name
Function/Operation
1
Transport roller 11 (Drive)
Transports paper to the transport roller 12.
2
Transport roller 12 (Drive)
Transports paper to the transport roller 13.
0#5
6(2
.
0!0
6
3
0.$0
6
:
""
6(
0
'.$
).46,
""
0!3+
#0&-?'!).
#0&-?#7##7
$
'.$
#0&-?$
6.
#0&-?#+
#0&-?,$
#0&-?,$
).46,
0 '.$
0 '.$
#.
#0&-?,$
#0&-?$
#0&-?#+
#0&-?#+
#0&-?'!).
6.
#0&-?#7##7
'.$
""
0.$:3
042#
6
6
#.
""
0.$:3
"50
42
0
(
0(.2
(
0(.2
(
042#
6
6
""
#32+
#.
82
(
0
6.0$
400$
'.$
'.$
82
(
0
6.0$
400$
'.$
400$
'.$
6.0$
400$
'.$
400$
'.$
""
#32+
#.
$37?2,
6.
'.$
$37?#3
6.
'.$
82
(
0
$37?2,
'.$
'.$
6.
6.
$37?#3
'.$
$37?#3
'.$
6.
$37?#3
'.$
6.
$37?2,
'.$
$37?#3
'.$
6.
$37?2,
'.$
#0&-
042#
400$
$37?2,
$37?#3
MX-7500N OPERATIONAL DESCRIPTIONS 13 – 20
(3)
LCC transport unit
Signal name
Name
Function/Operation
LCCM
LCC transport motor
Drives the LCC transport section.
LCHM1
LCC horizontal transport motor1
Drives the LCC transport section.
LCHM2
LCC horizontal transport motor2
Drives the LCC transport section.
LPPD
LCC paper entry detector
Detects paper transported from the LCC.
No.
Name
Function/Operation
1
Transport roller 14 (Drive)
Transports paper fed from the LCC to the transport roller 15.
2
Transport roller 15 (Drive)
Transports paper to the transport roller 16.
3
Transport roller 16 (Drive)
Transports paper to the transport roller 17.
$2)6%2
$2)6%2
0#5
0#5
8(0
0.$0
6
:
82
(
0
82
(
0
""
#32+
82
(
0
#32
0+
#.
6.0$
'.$
,00$
6.0$
'.$
,00$
6.0$
'.$
,00$
""
0
!3+
0!0
6
3
#.
6
6
,#
#-?!
,#
#-?"
,#
#-?"
,#
#-?!
6
6
""
8(
!
,#
#-?!
,#
#-?!
,#
#-?"
,#
#-?"
9
7
1
,
/
/
8
)
B
0
+
&
/
'
1
*
)
(
5
9
B
0
+
&
/
1
(
B
0
+
&
/
.
/
&
B
0
+
&
/
1
9
9
7
1
,
'
1
*
1
9
&
1
%
:
=
&
1
&
%
.
+
:
=
&
%
%
6
9
5
+
=
&
9
7
1
,
'
1
*
9
7
1
,
'
1
*
9
3
$
3
6
9
3
$
3
.
6
$
3
%
.
6
$
3
%
%
9
7
1
,
.
6
$
3
%
%
9
7
1
,
%
%
$
$
+
3
%
%
9
7
1
,
9
7
1
,
%
%
$
$
9
7
1
,
.
6
$
3
%
%
9
7
1
,
%
%
%
$
$
+
3
%
%
9
7
1
,
9
7
1
,
%
%
$
$
6
9
3
$
3
6
9
3
$
3
5
+
3
5
+
3
1
9
1
9
/
/
8
)
B
0
+
&
/
)
(
5
9
B
0
+
&
/
1
(
B
0
+
&
/
.
/
&
B
0
+
&
/
%
:
3
(
9
,
5
'
0
+
&
/
%
:
3
(
9
,
5
'
0
+
&
/
0
+
&
/
0
+
&
/
/
/
8
)
B
0
+
&
/
D
+
X
)
B
0
+
&
/
)
(
5
9
B
0
+
&
/
1
(
B
0
+
&
/
.
/
&
B
0
+
&
/
.
/
&
B
0
+
&
/
1
(
B
0
+
&
/
)
(
5
9
B
0
+
&
/
D
+
X
)
B
0
+
&
/
/
/
8
)
B
0
+
&
/
6
,00$
,##-
,#(-
,#(-
Click on the first or last page to see other MX-6500N / MX-7500N (serv.man27) service manuals if exist.