MX-5500N, MX-6200N, MX-7000N (serv.man60). LSU Section-Detailed section — Sharp Copying Equipment Service Manual (repair manual)

Model
MX-5500N MX-6200N MX-7000N (serv.man60)
Pages
10
Size
1.69 MB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / LSU Section-Detailed section
File
mx-5500n-mx-6200n-mx-7000n-sm60.pdf
Date

View Sharp MX-5500N / MX-6200N / MX-7000N (serv.man60) Service Manual online

MX-7000N  LSU SECTION  i – 1
MX-7000N
Service Manual
 
[i] LSU SECTION
1. Electrical and mechanism relation diagram
LSUFM
TH1
TH2
PGM
LSS_CL
LSS_BK
1
2
9
9
12
13
13
9
10
11
4
5
6
7
3
8
CN1
B20B-PNDZS-1
CN6
B07B-PASK-1
S4B-PH-K-S
CN6
B07B-PASK-1
B4P-PH-K-R
SM15B-GHB-TB
CN4
B34B-PNDZS-1
S10B-PH-K-S
CN4
B34B-PNDZS-1
S10B-PH-K-S
CN4
B34B-PNDZS-1
S10B-PH-K-S
3
4
1
nB
D
1
2
2
3
5
5V3
TH1
D-GND
+5V_LD
83
VREF_K
nB
D
+5V_LD
D-GND
1
2
2
1
Vref_K1
D-GND
5V3
D-GND
TH1
6
D-GND
4
3
4D
-G
N
D
D-GND
7
4
D-GND
D-GND
DT_K-
6
18
14
DT_K2+
DATA+_K1
/LDOFF
4
nENB_K
D-GND
5
6
DT_K+
D-GND
3
7
9
10
DATA-_K1
D-GND
8
DATA+_K2
DATA-_K2
DT_C-
DT_C+
D-GND
INT5V
/SH_C
/ENB_C
D-GND
Vref_C
LDCHK_C
n
L
DERR_C
D-GND
INT5V
/SH_M
/ENB_M
DT_M-
DT_M+
D-GND
Vref_M
D-GND
INT5V
10
9
8
7
6
5
4
3
LDCHK_M
n
L
DERR_M
2
1
/SH_Y
/ENB_Y
DT_Y-
DT_Y+
D-GND
Vref_Y
LDCHK_Y
n
L
DERR_Y
2
4
1
8
7
6
5
3
15
13
4
3
2
1
17
19
10
9
18
16
14
20
22
21
34
33
29
31
30
28
32
26
27
25
DT_M+
D-GND
Vref_M
LDCHK_M
n
L
DERR_M
D-GND
INT5V
n
L
DERR_Y
D-GND
Vref_Y
DT_M-
DT_Y+
LDCHK_Y
/SH_Y
/ENB_Y
DT_Y-
D-GND
INT5V
/SH_M
/ENB_M
/SH_K1
11
LDERR
14
/SH_K2
12
LDCHK
5
20
10
6
58
7
9
1
6
INT5V
/ENB_C
/SH_C
DT_C-
2
8
10
9
LDCHK_C
n
L
DERR_C
Vref_C
D-GND
Vref_K2
LDCHK_K
15
10
13
3
12
D-GND
+5V
DT_C+
11
4
17
nSHB_K
19
nSHB_K2
D-GND
7
13
TH2_1
nSH_K
DT_K2-
VREF_K2
nLDERR_K
nSH_K2
16
5
15
9
CN8
B08B-PASK-1
S4B-PH-K-S
CN8
B08B-PASK-1
B6B-PH-SM3-TB
CN2
B03B-PASK-1
nPOLY_START
P-GND
nPOLY_CK
nPOLY_LOCK
TH2_2
8
24V
6
GND
5
D-GND
4
CLOCK
1
TH2
3
7
BRAKE
3
4
1
6
5
LOCK
D-GND
3
24V1
n FANRDY
P-GND
1
2
24V
2
3
nBREAK
4
2
START/STOP
CN8
/LSS_CL
/LSS_CL
P
SM2P-N
R
CN9
S6B-XA
CN5
P
PC
CU
U P
PW
WB
B
B40B-PNDZS-1
CN6
S20B-PADSS-1
CN3
M
MO
OT
TH
HE
ER
R
P
PW
WB
B
B32B-PNDZS-1
S24B-PADSS-1
N.C
23
N.C
24
14
13
12
11
18
17
HSYNC_LSU_N
HSYNC_LSU_P
D-GND
D-GND
ECLK_LSU_P
ECLK_LSU_N
16
15
22
21
19
20
VSYNC_Y_N
1
1
D-GND
19
20
VSYNC_M_P
VSYNC_M_N
VSYNC_Y_P
VSYNC_Y_N
HSYNC_LSU_P
HSYNC_LSU_N
ECLK_LSU_P
ECLK_LSU_N
D-GND
D-GND
VSYNC_K_P
VSYNC_K_N
VSYNC_C_P
VSYNC_C_N
18
D-GND
3.3V
D-GND
5VN
24V3
P-GND
13
14
15
16
24V3
5
17
2
P-GND
6
D-GND
3
5VN
4
2
3
D-GND
CLCLK_N
CH2_N
10
11
9
CH3_P
CH3_N
CLCLK_P
D-GND
16
22
21
20
19
14
13
12
30
29
23
28
27
26
25
D-GND
4
24
5
6
7
8
18
17
15
CLCLK_P
CH3_N
CH3_P
D-GND
CH2_P
D-GND
D-GND
CLCLK_N
D-GND
CH0_N
CH0_P
D-GND
D-GND
CH1_N
CH1_P
CH2_N
CH1_N
CH2_P
CH0_N
D-GND
D-GND
CH1_P
2
CH0_P
16
17
18
32
1
31
4
3
D-GND
1
6
5
11
12
8
7
13
3.3V
VSYNC_C_N
VSYNC_M_N
VSYNC_M_P
VSYNC_Y_P
n TRANS_RST
9
10
VSYNC_K_N
14
15
12
JOBEND_INT
LSUTH1
LSUTH2
10
11
VSYNC_K_P
VSYNC_C_P
L
LS
SU
U P
PW
WB
B
INT5V
INT5V
1
LSUTH2
n TRANS_RST
JOBEND_INT
D-GND
2
2
D-GND
D-GND
3
3
D-GND
n SCK_LSU
4
4
n SCK_LSU
n TRANS_DATA
5
5
n TRANS_DATA
7
LSUASIC_RST
D-GND
6
6
D-GND
n RSV_DAT
8
LSUTH1
9
LSUASIC_RST
7
8
n RSV_DAT
1
2
2
INT24V2
1
3
40
9
INT24V2
S
DF1B-28DE
P
/LSS_BK
/LSS_BK
/LSS_BK
P
SM2P-B
R
INT24V2
2
2
20
20
38
18
INT24V2
18
37
1
INT24V2
1
MX-7000N  LSU SECTION  i – 2
2. Operational descriptions
A. Outline
Converts the image data (has been sent by way of PCU from the
image processing circuit) to laser beam, and irradiates to the OPC
drum surface.
The LSU unit is composed of the primary system (including optical
elements such as lasers and the polygon mirror and the mirror
which assures the optical path) and the scan system (which
includes the optical elements including the polygon mirror and the
mirror which assures the optical path).
By the once scanning, black laser LD sends two laser beams of
BK1 and BK2 at same time for high-speed print.
The interval in the sub-scanning direction of two laser beams is
42.3 
µ, also interval at image surface is 70 µ. The interval in the
paper feed direction of two laser beams is 70 
µ by electrically con-
trolled.
Since interval of the laser beams is adjusted at shipping, adjust-
ment about that is not required at the later.
B. Composition
(1) Primary system
(2) Scan system
(3) polygon motor
C. Outline of LSU specifications
Signal
Name
Function/Operation
LSS_BK
LSU shutter solenoid BK
Opens/closes the shutter of the LSU (BK)
LSS_CL
LSU shutter solenoid CL
Opens/closes the shutter of the LSU (CL)
LSUFM
LSU cooling fan motor
Cools the polygon motor.
PGM
Polygon mirror motor
Reflects the laser beams at constant-speed rotating.
TH1
LSU therminstor 1
Measures the temperature in LSU.
TH2
LSU therminstor 2
No.
Name
Function/Operation
1
LD PWB (K)
Controls laser beam flashing and the output value.
2
LD PWB (C)
3
LD PWB (M)
4
LD PWB (Y)
5
Cylindrical lens
Collects the laser beams, and focuses it.
6
f
θ lens 1
7
f
θ lens 2
8
Reflection mirror
Secures the path for laser beams.
9
Cylindrical lens
Collects the laser beams, and focuses it on the OPC drum.
10
Collective lens  for BD
Condenses the laser beam to the BD PWB.
11
BD PWB
Detects the timing for starting laser scanning.
12
LSU CNT PWB
Laser beams are controlled and the polygon motor control signal is generated according to the 
PCU PWB control signal and image data.
13
OPC drum
Forms electrostatic latent images according to laser beams.
Model
Number 
of mirror 
surface
Rotating speed
Bearing
Model of 55 sheets
7 surfaces
Color :
Monochrome :
35028 rpm
30371 rpm
AIR
Model of 62 sheets
Model of 70 sheets
Color : 
Monochrome : 
35028 rpm
35939 rpm
Effective scan width:
307 mm
Resolution:
600 dpi
Beam diameter:
Main scan = 50 to 65 
µm, Sub scan = 60 to 75 µm
Laser power:
Max. 0.8 mW
LD wavelength:
770 to 800 nm
MX-7000N  LSU SECTION  i – 3
D. Serial label
There is the LSU serial label on the LSU fan side.
• Unit is different in each model of 55 or 62 or 70 sheets.
3. Disassembly and assembly
A. LSU
(1) LSU
1)
Remove the left cabinet. (Refer to the "[A] EXTERNAL OUT-
FIT".)
2)
Remove the screws (A), and remove the left plate (B).
3)
Loosen the screws (C), and remove the screw (D). Remove
the screw (E), and remove the fixing plate (F). Remove the
snap band (G), and disconnect the connectors (H) and shift it
to the rear side, and remove the LSU (I) so that slide it to rear
side.
* When installing, insert the shaft (J) to cut-out portion of the
skew adjuster (K).
* After installing the LSU, be sure to check the condition of
skew image. Carry out the adjustment according to neces-
sity.
a. Dust-proof glass
Unit
Page
A
LSU
i - 3
B
Others
i - 7
Unit
Parts
Mainte
nance
Page
1
LSU
a
Dust-proof glass
{
i - 3
b
LSU CNT PWB
i - 4
c
LSU cooling fan motor
i - 5
d
Polygon motor
i - 5
e
LSU thermistor 2
f
LSU thermistor 1
i - 6
Unit
1
LSU
MODEL LSU CD UN 70
00000000
MODEL LSU CD UN 62
00000000
MODEL LSU CD UN 50
00000000
1
1-a
1-b
1-c
1-d
1-f
1-a
1-e
1-a
1
Unit
Parts
Mainte
nance
1
LSU
a
Dust-proof glass
{
B
A
A
A
C
E
F
I
H
H
1
D
G
J
K
1-a
1-a
1-a
1-a
MX-7000N  LSU SECTION  i – 4
1)
Open the front cabinet (A).
2)
Remove the claning rod (B).
3)
Check the dirt of the cleaning base (C) (tip of the cleaning rod).
* When cleaning base is dirty, replace it. (Refer to the "B. Oth-
ers".)
4)
Insert the cleaning rod (B) in the hole which cleaning is
required so that the cleaning base is made downward slowly.
5)
Insert the cleaning rod (B) all the way and slide it back and
forth a few times for cleaning.
6)
Clean all the cleaning holes (D) (4-positions) on the dustproof
glass.
* When the cleaning base became extremely dirty, replace it.
(Don't cleaning use dirty cleaning base other dustproof
glasses.)
b. LSU CNT PWB
1)
Remove the left cabinet. (Refer to the “[A] EXTERNAL OUT-
FIT”.)
2)
Remove the LSU. (Refer to the "(1) LSU".)
3)
Remove the screws (A), and remove the earth wire (B).
Remove the cover (C).
* When installing the cover (C), engage the pawls (D) to cover
lower (E). At this time be careful it bite the wire.
A
B
C
B
B
B
Unit
Parts
1
LSU
b
LSU CNT PWB
D
1-a
1-b
B
C
D
D
E
A
MX-7000N  LSU SECTION  i – 5
4)
Disconnect the connectors (F), and remove the screws (G)
and the screw (H), and remove the LSU CNT PWB (I).
* When installing, first of all install the screw (H).
* When installing, engage the PWB to the pawl (J).
c. LSU cooling fan motor
1)
Remove the left cabinet. (Refer to the “[A] EXTERNAL OUT-
FIT“)
2)
Remove the LSU. (Refer to the "(1) LSU".)
3)
Remove the screws (A), and remove the earth wire (B).
Remove the cover (C).
* When installing the cover (C), engage the pawls (D) to cover
lower (E). At this time be careful it bite the wire.
4)
Remove the screws (F), and remove the cover (G).
* When removing the cover (G), be careful to work place and
method, to don't enter the dust into the unit. Trouble (image
not fully etc.) may occur.
* When installing the cover, lock the pawl (H).
5)
Disconnect the connector (I). Remove the molt (J), and
remove the LSU cooling fan motor (K).
* When installing, point at the direction of outside with the
arrow (L).
d. Polygon motor, LSU thermistor 2
1)
Remove the left cabinet. (Refer to the “[A] EXTERNAL OUT-
FIT”.)
2)
Remove the LSU. (Refer to the "(1) LSU".)
Unit
Parts
1
LSU
c
LSU cooling fan motor
F
F
H
G
I
G
1-b
J
1-c
B
C
D
D
E
A
Unit
Parts
1
LSU
d
Polygon  motor
e
LSU thermistor 2
G
F
H
K
J
I
1-c
J
K
I
L
1-e
1-d

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Here you can view online or download Sharp MX-5500N / MX-6200N / MX-7000N (serv.man60) Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sharp MX-5500N / MX-6200N / MX-7000N (serv.man60) Copying Equipment. Information contained in Sharp MX-5500N / MX-6200N / MX-7000N (serv.man60) service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).