DOWNLOAD Sharp MX-6500N / MX-7500N (serv.man27) Service Manual ↓ Size: 8.03 MB | Pages: 53 in PDF or view online for FREE

Model
MX-6500N MX-7500N (serv.man27)
Pages
53
Size
8.03 MB
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PDF
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Service Manual
Brand
Device
Copying Equipment / Section 13 Operational Descriptions
File
mx-6500n-mx-7500n-sm27.pdf
Date
PREV: Sharp MX-6500N / MX-7500N (serv.man26) Service Manual

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MX-7500N  OPERATIONAL DESCRIPTIONS  13 – 26
B. Operational descriptions
(1)
Outline
Image data sent from the image process circuit are converted into
laser beams which are radiated to the surface of the OPC drum.
In this model, 4-laser system is employed where 4-laser diodes for
each color are radiated. The LSU unit is composed of the optical
element from laser to the polygon mirror, the primary system
including the mirror which assures light path, and the main scan-
ning system.
(2)
Composition
Primary system
Scanning system
* Though four laser beams are actually radiated for one color, they
are illustrated as one beam.
Signal name
Name
Function/Operation
LIAM_C
LSU tilt correction motor C
Correct the skew of LSU lens. (C)
LIAM_BK
LSU tilt correction motor K
Correct the skew of LSU lens. (K)
LIAM_M
LSU tilt correction motor M
Correct the skew of LSU lens. (M)
LIAM_Y
LSU tilt correction motor Y
Correct the skew of LSU lens. (Y)
LSUFM
LSU cooling fan motor
Cools the section LSU.
LSUSS_CL
LSU shutter solenoid
Opens/closes the LSU shutter.
PGM
Polygon motor
Reflects the laser beams at constant-speed rotating.
TH1_LSU
LSU temperature sensor 1
Detects the temperature in the LSU.
TH2_LSU
LSU temperature sensor 2
Detects the temperature in the LSU.
 No.
Name
Function/Operation
 1 
LD PWB 
Controls drive and power of the laser diode.
 2 
Cylindrical lens
Converges laser beams, and focuses on the polygon mirror. (sub scanning direction)
 3 
f
 lens 1
Converges laser beams on the OPC drum, making the laser scan speeds at both ends and the center the same.
 4 
f
 lens 2
 5 
Reflection mirror
Assures the optical path for laser.
 6 
f
 lens 3
Converges laser beams on the OPC drum, making the laser scan speeds at both ends and the center the same.
 7 
Collective lens for BD
Converges laser beams to the BD PWB.
 8 
BD PWB 
Detects the timing for starting laser scanning.
 9 
LSU control PWB 
Laser beams are controlled and the polygon motor control signal is generated according to the PCU PWB control 
signal and the MFPC PWB image data.
 10
LSU thermistor 1
Measures the temperature in LSU.
 11
Collimator lens
Arranges laser beams.
 12
Skew adjustment screw
This screw is used to adjust the radiation angle of laser beams for the OPC drum. By turning this adjustment screw, 
the image skew can be adjusted.
LD1 - 4
LD1 - 4
LD1 - 4
LD1 - 4
MX-7500N  OPERATIONAL DESCRIPTIONS  13 – 27
Main scanning direction
* Though four laser beams are actually radiated for one color, they
are illustrated as one beam.
(3)
Skew adjustment
When skew of lens unit is detected during Sim50-22 or “Auto color
registration adjustment, Skew adjustment motor corrects the skew.
C
M
Y
BK
REAR
FRONT
LD1 - 4
Scanning 
direction 
AA
MX-7500N  OPERATIONAL DESCRIPTIONS  13 – 28
7. OPC drum section
A. Electrical and mechanical relation diagram
DM_Y
DHPD_Y
CCMD_Y
DL2_Y
DL_Y
DL2_M
DL2_C
DL2_K
DL_M
DL_C
DL_K
CCHPD_M
CCHPD_C
CCHPD_K
CCMD_M
CCMD_C
CCMD_K
DHPD_M
DHPD_C
DHPD_K
DM_M
DM_C
DM_K
CCM_K
CCM_C
CCM_M
CCM_Y
CCHPD_Y
GB-K
MC-K
MC-C
GB-C
MC-M
GB-M
MC-Y
GB-Y
1
4
5
5
5
5
1
1
1
2
2
2
2
3
3
3
3
12
13
14
15
16
17
20
21
23
22
(NC)
5VNPD+R
P-GND
DM_C_CK
DM_C_D
DHPD_C
24V3
GND
DM_C_CK
DM_C_D
(NC)
23CSR-8PK
5VNPD+R
P-GND
DHPD_C
24V3
GND
DM_C_CK
1
2
6
8
9
11
10
3
7
1
11
10
9
2
3
4
5
6
1-179228-1
11XR-6H-P
5
4
3
2
1
7
6
DM_C_LD
24V3
P-GND
(NC)
(NC)
DM_C_CK
DM_C_D
CW/CCW
1
11
10
9
2
3
4
5
6
24V3
P-GND
DM_M_CK
DM_M_D
5VNPD+R
GND
DHPD_M
1
11
10
9
2
3
4
5
6
24V3
P-GND
5VNPD+R
GND
DHPD_M
DM_M_D
DM_M_CK
B23B-CSRK
1
2
6
8
9
11
10
3
7
1-179228-1
11XR-6H-P
CN-19
5
4
3
2
1
7
6
24V3
DM_M_LD
P-GND
DM_M_CK
DM_M_D
CW/CCW
(NC)
(NC)
PAP-07V-S
B7B-PASK-1
1
11
10
9
8
7
2
3
4
5
6
23
22
24
25
26
27
28
29
30
31
31CSR-8PK
B31B-CSRK
CN-20
12
13
14
15
16
17
18
19
20
21
2
2
2
1
3
PHR-3
PHR-3
1
3
S
P
QR/P8-8*-C
1
2
5
6
4
3
7
8
1
2
5
6
4
3
7
8 (NC)
(NC)
(NC)
(NC)
(NC)
(NC)
PHR-3
1
3
1
10
9
8
7
2
3
4
5
6
1
2
5
6
8
9
10
4
3
7
1
11
10
9
8
7
2
3
4
5
6
1
2
5
6
8
9
11
10
4
3
7
1-179228-1
1-179228-0
10XR-6H-P
11XR-6H-P
1
10
9
8
7
2
3
4
5
6
1
2
5
6
8
9
10
4
3
7
10XR-6H-P
1-179228-0
2
PHR-3
1
3
S
P
QR/P8-8*-C
1
2
5
6
4
3
7
8
1
2
5
6
4
3
7
8
(NC)
(NC)
(NC)
(NC)
(NC)
(NC)
PROCESS UN (MAGENTA)
PROCESS UN (YELLOW)
5
4
3
2
1
7
6
(NC)
2
PHR-3
1
3
2
1
3
PHR-3
PCU PWB
2
2
2
1
3
PHR-3
PHR-3
1
3
S
P
QR/P8-8*-C
1
2
5
6
4
3
7
8
1
2
5
6
4
3
7
8
(NC)
(NC)
(NC)
(NC)
(NC)
(NC)
PHR-3
1
3
1
10
9
8
7
2
3
4
5
6
1
2
5
6
8
9
10
4
3
7
GND
5VNPD+R
GND
5VNPD+R
CCMD_C
CCM_C_A
CCM_C_B
DL_C
CCHPD_C
DL2_C
GND
CCHPD_K
GND
GND
5VNPD+R
GND
GND
DL_K
DL2_K
GND
5VNPD+R
GND
5VNPD+R
CCMD_C
CCM_C_A
CCM_C_B
DL_C
CCHPD_C
22
23
24
25
26
27
28
29
31
30
DL2_C
GND
5VNPD+R
(NC)
(NC)
(NC)
DL_K
DL2_K
CCHPD_K
1
11
10
9
2
3
4
5
6
P-GND
DM_K_CK
DM_K_D
DHPD_K
5VNPD+R
GND
1
2
6
8
9
11
10
3
7
1
11
10
9
2
3
4
5
6
P-GND
DM_K_CK
DM_K_D
DHPD_K
24V3
5VNPD+R
GND
B31B-CSRK
31CSR-8PK
1-179228-1
1-179228-0
10XR-6H-P
11XR-6H-P
1
10
9
8
7
2
3
4
5
6
1
2
5
6
8
9
10
4
3
7
CCMD_K
GND
5VNPD+R
CCM_K_A
CCM_K_B
GND
DL_K
5VNPD+R
CCHPD_K
DL2_K
1-179228-0
10XR-6H-P
CCMD_K
GND
5VNPD+R
CCM_K_A
CCM_K_B
GND
DL_K
5VNPD+R
CCHPD_K
12
13
14
15
16
17
18
19
20
21
DL
2_K
CN-18
2
PHR-3
1
3
S
P
QR/P8-8*-C
1
2
5
6
4
3
7
8
1
2
5
6
4
3
7
8
(NC)
GND
5VNPD+R
(NC)
(NC)
(NC)
DL_C
DL2_C
CCHPD_C
(NC)
(NC)
(NC)
(NC)
(NC)
GND
GND
DL_C
PROCESS UN (CYAN)
PROCESS UN (BLACK)
5
4
3
2
1
7
6
DM_K_LD
24V3
P-GND
(NC)
(NC)
DM_K_CK
DM_K_D
CW/CCW
PAP-07V-S
B7B-PASK-1
2
GND
GND
DL2_C
PHR-3
1
3
2
1
3
PHR-3
GND
5VNPD+R
CCHPD_C
24V3
P-GND
DM_Y_CK
DM_Y_D
DVC_Y
24V3
DHPD_Y
GND
5VNPD+R
CCMD_Y
GND
5VNPD+R
CCM_Y_B
CCM_Y_A
5VNPD+R
CCHPD_Y
GND
DL_Y
DL2_Y
CCMD_M
5VNPD+R
CCM_M_B
CCM_M_A
5VNPD+R
GND
DL_M
GND
DL2_M
CCHP_M
DM_Y_CK
5VNPD+R
P-GND
24V3
DM_Y_D
DVC_Y
24V3
DHPD_Y
GND
5VNPD+R
CCM_Y_B
CCM_Y_A
5VNPD+R
CCHPD_Y
CCMD_Y
GND
GND
DL_Y
DL2_Y
5VNPD+R
CCM_M_B
CCM_M_A
5VNPD+R
CCMD_M
GND
GND
DL_M
DL2_M
CCHP_M
(NC)
GND
DL_Y
DL2_Y
5VNPD+R
CCHPD_Y
(NC)
(NC)
24V3
P-GND
(NC)
DM_Y_CK
DM_Y_D
CW/CCW
DM_Y_LD
GND
GND
DL_Y
GND
GND
DL2_Y
GND
5VNPD+R
CCHPD_Y
GND
GND
DL_M
GND
GND
DL2_M
GND
5VNPD+R
CCHPD_M
(NC)
GND
DL_M
DL2_M
5VNPD+R
CCHPD_M
(NC)
(NC)
DM_K_LD
CW/CCW
DM_K_LD
CW/CCW
DM_Y_LD
CW/CCW
CW/CCW
DM_Y_LD
DM_M_LD
CW/CCW
DM_C_LD
DM_M_LD
CW/CCW
DM_C_LD
DM_C_D
CW/CCW
PAP-07V-S
B7B-PASK-1
PAP-07V-S
B7B-PASK-1
CW/CCW
24V3
7-292254-1
7-292254-0
7-292254-0
7-292254-0
7-292254-0
7-292254-1
7-292254-1
7-292254-1
1
3
5
7
9
11
13
15
17
19
GND
INT24V2
24V3
PNDP-40V-Z
B40B-PNDZS
CN-23(1/3)
/MC_LD2
/MC_DATA
/MC_CLK
/MC_LD
HV_REM_MC
MCBKERR
MCCLERR
2
179228-3
D-GND
5VNPD+R
DHPD_C
1
3
179228-3
2
1
3
DHPD_M
5VNPD+R
D-GND
2
1
3
179228-3
DHPD_Y
D-GND
5VNPD+R
2
1
3
179228-3
CCMD_Y
D-GND
5VNPD+R
1
3
CN-1
S3B-PH-K-S
PHR-3
CCM_Y_A+
CCM_Y_B-
2
1
3
179228-3
CCMD_M
5VNPD+R
D-GND
1
3
CN-1
S3B-PH-K-S
PHR-3
CCM_M_A+
CCM_M_B-
1
3
CN-1
S3B-PH-K-S
CCM_C_A+
CCM_C_B-
PHR-3
CN-1
1
3
S3B-PH-K-S
CCM_K_A+
CCM_K_B-
PHR-3
2
1
3
179228-3
D-GND
DHPD_K
5VNPD+R
2
1
3
179228-3
D-GND
CCMD_K
5VNPD+R
2
1
3
179228-3
D-GND
CCMD_C
5VNPD+R
SRA-21T-3
SRA-21T-3
SRA-21T-3
SRA-21T-3
SRA-21T-3
SRA-21T-3
SRA-21T-3
SRA-21T-3
8
2
1
3
4
5
6
7
9
GND
CN-1
10
INT24V2
/MC_DATA
/MC_CLK
/MC_LD
/MC_LD2
HV_REM_MC
MCBKERR
MCCLERR
24V3
B10B-PASK-1
PAP-10V-S
VHR-2N
PS-250
VHR-2N
PS-250
VHR-2N
PS-250
VHR-2N
PS-250
MC-K
GB-K
GB-C
MC-C
MC-M
GB-M
MC-Y
GB-Y
1
1
1
1
MC PWB
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