Sharp MX-6240N / MX-7040N (serv.man32) Service Manual ▷ View online
MX-7040N OPERATIONAL DESCRIPTIONS 13 – 33
10. Transfer section
A. Electrical and mechanical relation diagram
(1)
Transfer section
PTC
BTM
WTM
PTCCM
2TC
PTCCHPD
1TURC
1TURRC
1TUD_K
1TUD_CL
1TC_Y
1TC_M
1TC_C
1TC_K
8
1
3
4
2
4
5
6
7
3
3
3
14
9
15
13
11
16
10
12
B-1
B-2
B-3
B-4
B-5
B-6
B-7
B-8
B-9
B-10
B-11
B-12
B-2
B-3
B-4
B-5
B-6
B-7
B-8
B-9
B-10
B-11
B-12
1TURC
24V4
1TURRC
24V4
1TURRC
24V4
24V4
P-GND
BTM_CK
P-GND
BTM_CK
CW/CCW
BTM_D
BTM_LD
PCU PWB
5VNPD+R
1TUD_K
GND
A-1
A-2
A-3
A-2
A-3
CN-13
B24B-CZWHK-B-1
B24B-CZWHK-B-1
CZHR-12V-S
PTCCM_A
PTCCM_B
PTCCM_B
21
23
25
23
25
PNDP-40V-Z
2
4
6
8
4
6
8
10
12
14
16
12
14
16
/TC1_CLK
PNDP-40V-Z
INT24V2
GND
/TC1_DATA
GND
/TC1_DATA
/TC1_LD
HV_REM_MC
HV_REM_MC
1TC-K
1TC-C
1TC-M
1TC-Y
2
1
3
4
5
6
4
5
6
/TC1_CLK
CN-1
GND
/TC1_DATA
/TC1_DATA
/TC1_LD
INT24V2
HV_REM_MC
SRA-21T-3
SRA-21T-3
SRA-21T-3
SRA-21T-3
B08B-PASK-1
PAP-08V-S
CN-1
1
2
3
4
5
6
7
8
2
3
4
5
6
7
8
/TC2_CLK
HV_REM_TC2
24
26
28
30
32
34
36
38
/TC2_CLK
HV_REM_TC2
PNDP-38V-Z
CN-23(2/3)
B40B-PNDZS
B40B-PNDZS
B40B-PNDZS
CN-23(1/3)
B38B-PNDZS
(2/2)CN-12
GND
5VNPD+R
1TUD_CL
1TCS-ERR
1TCO-ERR
1TCO-ERR
7
1TCS-ERR
INT24V2
GND
/TC2_DATA
GND
/TC2_DATA
/TC2_LD
2TC_ERR
PTC_ERR
PTC_ERR
PS-250
PS-250
PS-250
PS-250
8
PAP-08V-S
B08B-PASK-1
1TCO-ERR
PS-250
SRA-21T-3
PTC
SRA-21T-3
2TC
PS-250
2TC PWB
1TC PWB
INT24V2
GND
/TC2_DATA
GND
/TC2_DATA
/TC2_LD
PTC_ERR
2TC_ERR
4
3
2
1
3
2
1
GND
5VNPD+R
5VNPD+R
PTCCHPD
(NC)
(NC)
21CSR-8PK
B21B-CSRK
GND
5VN
WTM_D
WTM_CK
GND(WTM_CW)
WTM_LD
5VN
DSW_CS
GND
5VN
DSW_RL
GND
5VN
WTM_D
WTM_CK
GND(WTM_CW)
WTM_LD
5VN
DSW_CS
GND
5VN
DSW_RL
GND
17
16
16
18
19
20
21
22
23
29
26
28
27
27
25
24
24
B29B-CSRK
24V4
(NC)
29CSR-8PK
CN-6
CN-16
Reserve_OUT1
2
3
1
5VNPD+R
GND
1TUD_K
GND
1TUD_K
03XR-6H-P
1
2
3
2
3
3
2
1
2
1
5VNPD+R
1TUD_K
GND
03CZ-6H
BU03P-TZ-S
03CZ-6Y
(NC)
1
24V
2
3
4
5
6
7
3
4
5
6
7
BTM_LD
B07B-PASK-1
P-GND
BTM_CK
BTM_D
CW/CCW
BTM_D
CW/CCW
BRAKE
PAP-07V-S
1
2
3
4
5
6
7
2
3
4
5
6
7
GND
5VN
WTM_D
WTM_CK
GND(WTM_CW)
WTM_LD
5VN
WTM_D
WTM_CK
GND(WTM_CW)
WTM_LD
24V4
13
12
11
10
12
11
10
9
8
7
8
7
13XR-6H-P
1-173977-3
7-292254-3
4
7
6
5
6
5
1
2
3
4
5VN
WTM_D
WTM_CK
WTM_D
WTM_CK
WTM_LD
GND
GND(WTM_CW)
24V4
1
2
3
2
3
5
6
7
6
7
179228-7
173977-7
6-292254-7
(NC)
ZHR-8
8
7
6
5
4
3
2
1
7
6
5
4
3
2
1
GND
5VN
WTM_D
WTM_CK
GND(WTM_CW)
WTM_LD
5VN
WTM_D
WTM_CK
GND(WTM_CW)
WTM_LD
B8B-ZR
(NC)
24V4
1
2
3
2
3
3
2
1
2
1
5VNPD+R
GND
GND
BU03P-TZ-S
CZHR-03V-S
03CZ-6Y
1TUD_CL
2
3
1 1TUD_CL
GND
5VNPD+R
03XR-6H-P
GND
PTCCHPD
18
19
19
5VNPD+R
20
BU21P-TCS-LE
21CSR-8PK
21 (NC)
(NC)
(NC) 1
2
4
3
3
21CSR-8PK
1
2
3
GND
PTCCHPD
5VNPD+R
03XR-6H-P
1
2
3
4
5
6
2
3
4
5
6
1
2
3
4
5
6
2
3
4
5
6
1TURC
24V4
1TURRC
24V4
1TURRC
24V4
PTCCM_B
PTCCM_A
SMP-06V-NC
SMR-06V-N
SMR-02V-NSMP-02V-NC
1
1
24V4
2
2
1TURC
SMP-02V-BC
SMR-02V-B
1
1
24V4
2
2
1TURRC
CN-1
S3B-PH-K-S
PHR-3
1
3
PTCCM_A
PACCM_B
PACCM_B
MX-7040N OPERATIONAL DESCRIPTIONS 13 – 34
Signal name
Name
Function/Operation
1TC-CMY
Primary transfer output (CMY)
Color transfer high voltage
1TC-K
Primary transfer output (K)
B/W transfer high voltage
1TUD_CL
Transfer mode detector (CL)
Color transfer roller position detection
1TUD_K
Transfer mode detector (BK)
B/W transfer roller position detection
1TURC
Primary transfer separation clutch
Controls the primary transfer separation mode.
1TURRC
Primary transfer separation reverse clutch
Controls the primary transfer separation mode.
2CL
Secondary transfer brush roller output
Cleans the secondary transfer section.
2DR
Secondary transfer drive roller output
Reduces toner splash in separation.
2TC
Secondary belt transfer output
Secondary transfer high voltage
BTM
Transfer belt motor
Drives the transfer belt.
PTC
PTC output
PTC high voltage
PTCCHPD
PTC cleaner home position sensor
Detects the PTC cleaner home position.
PTCCM
PTC cleaning motor
Drives the PTC cleaner.
WTM
Waste toner drive motor
Transports waste toner.
No.
Name
Function/Operation
1
Primary transfer cleaner blade
Clean and remove residual toner from the primary transfer belt.
2
Primary transfer belt
Toner on the drum is transferred to form toner images on the belt.
3
Primary transfer roller
Transfers toner images on the OPC drum to the primary transfer belt.
4
Primary transfer idle roller
Transfer belt follower.
5
Primary transfer belt drive roller
Drives the transfer belt.
6
Primary transfer belt follower roller
Transfer belt follower.
7
Primary transfer belt tension roller
Apply a tension to the transfer belt.
8
Belt CL brush
Transfer belt back surface cleaning.
9
PTC opposing roller
Roller to flow a PTC current.
10
Secondary transfer belt
Transfers toner images on the primary transfer belt to paper.
11
Secondary transfer roller
Transfers toner images on the primary transfer belt to paper.
12
Secondary transfer belt drive roller
Drives the transfer belt.
13
Secondary transfer belt follower roller
Transfer belt follower.
14
PTC unit
Reduces the positive charges on the primary transfer belt.
15
Registration backup roller
Holds the belt position in the registration section in the process control.
16
Secondary transfer blade
Cleans remaining toner on the secondary transfer belt.
MX-7040N OPERATIONAL DESCRIPTIONS 13 – 35
(2)
Process registration sensor section
Signal name
Name
Function/Operation
PCSS
Color image density sensor PWB reflection plate shutter solenoid
Opens/closes the shutter of the process control and the registration
sensor.
sensor.
PTCCHPD
PTC cleaner home position detection
Detects the PTC cleaner home position.
REGS_C/PCS_C
Color image density sensor/Image registration sensor C
Detection of registration shift on the machine front (C) side, and
detection of the M/BK toner patch density.
detection of the M/BK toner patch density.
REGS_F/PCS_F
Color image density sensor/Image registration sensor F
Detection of registration shift on the machine front (F) side, and detection
of the C toner patch density.
of the C toner patch density.
REGS_R/PCS_R
Color image density sensor/Image registration sensor R
Detection of registration shift on the machine front (R) side, and
detection of the Y toner patch density.
detection of the Y toner patch density.
PTCCHPD
REGS_R /PCS R
REGS_C /PCS_C
REGS_F /PCS_F
PCSS
SMP-02V-NC
SMR-02V-N
2
1
2
1
1
24V3
PCSS
PCSS
179228-2
6-292254-2
02XR-6H-P
1
2
2
2
1
PCSS
24V3
21CSR-8PK
(NC)
PCU PWB
GND
5VN
GND
5VN
PCSS
REGS_R_LED
REGS_R
PCS_R
PCS_R
REGS_C_LED
GND
5VN
REGS_C
PCS_C
PCS_C
REGS_F_LED
REGS_F
PCS_F
PCS_F
15
13
14
12
11
10
11
10
9
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
17
16
16
18
19
20
21
GND
5
VNPD+R
PTCCHPD
(NC)
(NC)
21CSR-8PK
B21B-CSRK
24V3
CN-16
BU21P-TCS-LE
1
12
11
10
9
8
7
2
3
4
5
6
3
4
5
6
13
14
15
16
17
18
19
20
21
14
15
16
17
18
19
20
21
(NC)
PCSS
GND
5VN
REGS_R_LED
REGS_R
PCS_R
PCS_R
GND
5VN
REGS_C_LED
REGS_C
PCS_C
PCS_C
GND
5VN
REGS_F_LED
REGS_F
PCS_F
PCS_F
GND
PTCCHPD
5VNPD+R
24V3
(NC)
12
1
2
5
6
8
9
11
10
10
4
3
3
7
15
14
13
14
13
16
17
18
19
20
21
21CSR-8PK
1
2
2
4
5
5
3
1
2
2
4
5
5
3
D-GND
REGS_C
PCS_C
PCS_C
5VN
REGS_R_LED#
D-GND
REGS_R
PCS_R
PCS_R
5VN
REGS_C_LED#
05XR-6H-P
05XR-6H-P
1
2
2
4
5
5
3
5VNPD
D-GND
D-GND
REGS_F
PCS_F
PCS_F
1
2
3
2
3
GND
PTCCHPD
5VNPD+R
REGS_F_LED#
03XR-6H-P
05XR-6H-P
MX-7040N OPERATIONAL DESCRIPTIONS 13 – 36
B. Operational descriptions
(1)
Transfer
a. Transfer operation
a-1. Transfer operation
Toner images on the OPC drum are transferred to the primary
transfer belt by applying the positive high voltage to the primary
transfer roller.
transfer belt by applying the positive high voltage to the primary
transfer roller.
Negative charge is generated by the PTC unit, and this strengthens
negative charges on the transfer belt, improving the secondary
transfer efficiency.
negative charges on the transfer belt, improving the secondary
transfer efficiency.
By this operation, the transfer efficiency in the secondary transfer is
improved.
improved.
Then a high negative voltage is applied to the primary transfer belt
to transfer the toner images from the primary transfer belt to paper.
to transfer the toner images from the primary transfer belt to paper.
In the monochrome mode and the color mode, the black (K) trans-
fer voltage is selected.
fer voltage is selected.
a-2. Cleaning operation
Toner is cleaned by the secondary transfer cleaning blade, and
transported to the waste toner section.
transported to the waste toner section.
Unnecessary toner remained on the secondary transfer belt is
transferred to the primary transfer belt by making the polarity of the
applying voltage to the primary transfer belt. Then it is cleaned by
the primary transfer belt cleaning blade to be transported to the
waste toner section.
transferred to the primary transfer belt by making the polarity of the
applying voltage to the primary transfer belt. Then it is cleaned by
the primary transfer belt cleaning blade to be transported to the
waste toner section.
b. Primary (intermediate) transfer roller separation
mechanism and contents
The primary transfer roller operates pressing all the rollers, sepa-
rates all the rollers, or presses only black depending on the opera-
tion mode.
rates all the rollers, or presses only black depending on the opera-
tion mode.
When the roller separation clutch (1TURC) turns ON, the transfer
cam rotates to shift the primary transfer link and the primary trans-
fer arm linked with the cam in the arrow direction, performing sepa-
rating operation of the roller.
cam rotates to shift the primary transfer link and the primary trans-
fer arm linked with the cam in the arrow direction, performing sepa-
rating operation of the roller.
It also performs all pressing, all separating, or pressing only black
with the roller separation sensors (1TUD_CL, 1TUD_K) and the
separation detection arm.
with the roller separation sensors (1TUD_CL, 1TUD_K) and the
separation detection arm.
(2)
Image density detection and registration detection
The image density and the image registration are detected by the
sensors provided at the front, the center, and the rear of the frame.
sensors provided at the front, the center, and the rear of the frame.
a. Function and operation of the color image density sensor/
image registration sensor
a-1. Image registration sensor
The shift of the image registration (F, C, R) is detected.
a-2. Process control sensor/Image registration sensor
PTC
1TUD_CL
1TUD_BK
All pressing
ON
OFF
All separating
OFF
ON
Pressing only black
OFF
OFF
Process control sensor
Image registration sensor
Rear
Y
R
Center
M/BK
C
Front
C
F
All separating
Pressing only black
All pressing
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