Sharp Mx 2300n Service Manual

							MX-2300/2700 N/G  PHOTOCONDUCTOR SECTION  i – 4 2) Remove the waste toner bottle unit.
3) Loosen the blue screw. Check to confirm that lock is released,
and open the drum positioning unit.
NOTE: When the transfer belt tension of the primary transfer
unit is released manually, turn on the power again after com-
pletion of the work. (Power OFF-ON) This procedure initializes
the transfer roller to return it to the home position.
4) Loosen the fixing screw of the developing unit on the left side
of each color drum unit.
5) Remove the developing unit with both hands.6) Hold the lock lever, and pull out each color drum unit slowly,
and support the lower section of the unit with both hands to
remove.
a. OPC drum
1) Remove each drum unit from the machine.
2) Remove the screws and remove the DR fixing shaft AS.
3) Slide the OPC drum to the front side, and lift the drum rear
side, and remove the OPC drum from the hole in the front sec-
tion.
b. MC charger unit
1) Remove each drum unit from the machine.
2) Remove the OPC drum.
3) Remove the screws, and remove the MC cover.
1
2
1
2
1
2
1
2 
						

							MX-2300/2700 N/G  PHOTOCONDUCTOR SECTION  i – 5 4) Disengage the lock pawl with a screwdriver, and remove the
MC cleaner shaft. 
5) Release the pawl, and remove the process cover. Remove the
MC charger unit.
c. Side seal F, R
d. Toner reception seal
1) Remove each drum unit from the machine.
2) Remove the OPC drum.
3) Remove the MC charger unit.
4) Remove the side seal F/R and the toner reception seal.
* When attaching the side seal F/R and the toner reception
seal, arrange so that they are in the ranges specified in the
figure below.e. Cleaner blade
1) Remove each drum unit from the machine.
2) Remove the OPC drum.
3) Remove the MC charger unit.
4) Remove the side seal F/R and the toner reception seal.
5) Remove the screws, and remove the cleaner blade.
6) Remove the toner mixing sheet from the cleaner blade.
* Tighten the screws according to the marks 1, 2, and 3.
(2) Others
a. Waste toner drive motor
1) Remove the frame cover. (Refer to Frame Cover in External
Outfit Section.)
2) Remove the connector and the screws, then remove the waste
toner drive unit.
Remove the screw, and remove the waste toner drive motor
from the waste toner drive unit. 
123
0 - 0.5mm0 - 0.5mm
0 - 0.5mm
0 - 0.3mm0 - 0.3mm
0 - 0.3mmReference
line
Reference line
Reference lineReference line
Reference line
2
3
1 
						

							MX-2300/2700 N/G  PHOTOCONDUCTOR SECTION  i – 6 b. Waste toner full detection switch
1) Remove the frame cover. (Refer to Frame Cover in External
Outfit Section.)
2) Remove the connector and the screws, then remove the waste
toner drive unit.3) Remove the screw and the spring, and remove the waste toner
box empty lever. 
Disengage the connector and the pawl, and remove the waste
toner full detection switch. 
4. Maintenance
✕: Check (Clean, replace, or adjust according to necessity.) {: Clean ▲: Replace U: Adjust ✩: Lubricate †: Shif the position.
No. Parts nameMonochrome 
supply, 
mechanical 
partsWhen 
calling100
K200
K300
K400
K500
K600
K700
K800
K900
K1000
K11 0 0
K1200
KRemark: Refer to 
the Parts Guide.
Block/Item No. 
(Only the 
replacement parts 
are described.) Color supply60
K120
K180
K240
K300
K360
K
1 Drum (BK) Monochrome 
supply▲▲▲▲▲▲▲▲▲ ▲ ▲ ▲
2 Cleaner blade 
(BK)▲▲▲▲▲▲▲▲▲ ▲ ▲ ▲(P/G No.: [24]-14)
3 Charging unit (BK)▲▲▲▲▲▲▲▲▲ ▲ ▲ ▲(P/G No.: [24]-2)
4 Drum (C) Color supply▲▲▲▲ ▲ ▲
5 Cleaner, blade (C)▲▲▲▲ ▲ ▲(P/G No.: [24]-14)
6 Charging unit (C)▲▲▲▲ ▲ ▲(P/G No.: [24]-2)       
7 Side seal F/R (BK) Mechanism 
parts✕✕✕✕✕✕✕✕✕ ✕ ✕ ✕
8 Toner reception 
seal (BK)✕ ✕✕✕✕✕✕✕✕✕ ✕ ✕ ✕
9 Side seal F/R (C)✕✕✕✕ ✕ ✕
10 Toner reception 
seal (C)✕ ✕✕✕✕ ✕ ✕
11 Waste toner box✕ ✕✕✕✕✕✕✕✕✕ ✕ ✕ ✕ 
						

							MX-2300/2700 N/G  PHOTOCONDUCTOR SECTION  i – 7
3,67,98,10
2,5 7,9
1,4
11 
						

							MX-2300/2700 N/G  TONER SUPPLY SECTION  J – 1 MX2700N
Service Manual [J] TONER SUPPLY SECTION
1. Electrical and mechanism relation diagram
A. Toner supply section
CN12CN5CRUM(BLACK)
CRUM(K)
RSM2P P
CRUM(CYAN)
CRUM(C)
1
RSM2P P
RSM2P P
RSM2P PCRUM(MAGENTA)
CRUM(M)
CRUM(YELLOW)
CRUM(Y)
B10B-PHDSS-B P SM10P R
B32B-PHDSS-B
DF11-6DP-SP1 DF11-6DP-SP1
CRM_K_CK#4D-GND
7
CRM_M_DT#
1 5V_CRUM
2CRM_K_DT#
5V_CRUM
5CRM_C_DT#2
4CRM_C_DT#
CRM_C_CK#
D-GND 3
1 6
9
CRM_Y_DT#
8CRM_M_CK#
1
2
3
4
6 5
7
85V_CRUM 2CRM_K_DT#4
5V_CRUM 2
CRM_M_DT#4
3
D-GND 15V_CRUM 2
CRM_Y_DT#4CRM_Y_CK# CRM_C_CK#
5 4 3 1 2 6
5 4 3 1 2 6
5V_CRUMCRM_K_DT#
CRM_K_CK#
D-GND1
3
5
9
10 7
CRM_C_DT#
CRM_C_CK#2
4
CRM_M_DT#
CRM_M_CK#
CRM_Y_DT#
CRM_Y_CK#
6
8
CRM_K_CK#3
D-GND 1
CRM_M_CK#3
D-GND 1
9
10 10
CRM_Y_CK#
TNM_Y_1 TNM_M_2TNM_C_2 /DVM_K_DINT24V2
P-GND
3
TNM_Y
2
TNM_M
TNM_C
TNM_K
TNM_Y_2
1
2 1 2 1
2
1
INT24V2 22
246
/DVM_K_CK
10
12
DVM_K_LD
TNM_K_1 4
1 5
3
9
11 TNM_Y_2 218 21
20 TNM_C_2 21
TNM_Y_1 TNM_C_12
1 1 2
215
17
19
P-GND TNM_K_1
TNM_M_1 TNM_K_2
TNM_M_21
TNM_C_1TNM_K_2
31DHPD_K
5VLED
29
D-GND
23TNM_M_1
5VLED
/DVM_CL_CK
DVM_CL_LD/DVM_CL_D
PCU PWB
16
DHPD_CL 32 14/1TURC
3024V3
5V_CRUM
5V_CRUM
5V_CRUM
5V_CRUM
5V_CRUM
5V_CRUMD-GND
D-GND
D-GND
D-GND
D-GND
D-GND
1
1
1 
						

							MX-2300/2700 N/G  TONER SUPPLY SECTION  J – 2
2. Operational descriptions
When the toner cartridge is inserted to the machine, the lock pawl
is disengaged and the supply shutter is opened. 
The transport pipe shutter is opened and closed by the shaft which
is linked with the developing lever. 
The toner supply section of the developing unit is opened and
closed when the open/close lever on the unit hits the block on the
machine. 
Signal name Name Function/Operation
TNM Toner motor (Y, M, C, K) Toner supply motor to the develping unit
CRUM CRUM (Y,M,C,K) Data memory for the toner cartridge
No. Name Function/Operation
1 Toner transport pipe Toner supply pipe from the toner cartridge to the developing unit 
						

							MX-2300/2700 N/G  TONER SUPPLY SECTION  J – 3
3. Maintenance
✕: Check (Clean, replace, or adjust according to necessity.) {: Clean ▲: Replace U: Adjust ✩: Lubricate †: Shif the position.
No. Parts nameMonochrome 
supply, 
mechanical 
partsWhen 
calling100
K200
K300
K400
K500
K600
K700
K800
K900
K1000
K1100
K1200
KRemark: Refer to the 
Parts Guide. Block/
Item No. (Only the 
replacement parts are 
described.)
Color supply60
K120
K180
K240
K300
K360
K
1 Toner cartridge 
(BK/C/M/Y)Monochrome, 
color supplyUser replacement for every toner empty (or the specified traveling distance). Replace after 2 years 
of use.
1 
						

							MX-2300/2700 N/G  DEVELOPING SECTION  K – 1 MX2700N
Service Manual [K] DEVELOPING SECTION
1. Electrical and mechanism relation diagram
CN12
B7P-PH-K-S
B7P-PH-K-S/DVM_K_DINT24V2
P-GND
/DVM_CL_CKINT24V2
P-GND
4 1
2
5
6
7 /DVM_CL_D
DVM_CL_LD
5V /DVM_K_CK
/DVM_K_D1
2
4 INT24V2
P-GND
DVM_K_LD
5V5
6
7
INT24V2 6
/DVM_K_CK
10
12
DVM_K_LD 4
1 5
3
9
112
P-GND
/DVM_CL_CKDVM_CL_LD/DVM_CL_D
PHNR-10-H,BU10P-TR-P-H
CN15
C QR/P8-8P P
S4P-PH-K-S
PHNR-10-H,BU10P-TR-P-H
C QR/P8-8P P
S4P-PH-K-S
PHNR-10-H,BU10P-TR-P-H
C QR/P8-8P P S4P-PH-K-S
PHNR-10-H,BU10P-TR-P-H
C QR/P8-8P P
B40B-PADSS-B
S4P-PH-K-S4 TSG_BK7 TCS_K 5
455
6
7 24V3
TCS_C
D-GND 78
D-GND24V3 2 5 24V3
D-GND 4
2
3 TCS_C5
6 7
DVSET_K
24V3 TCS_K 3 6 TCS_K
D-GND
TSG_BK 15
1 7
TCS_C
3 7
5VN 2
326
3
DVSET_K 2 8 24V3
D-GND
1
6658
7 24V3 5 24V3 2
D-GND 4 7 D-GND 7
1
TCS_Y 3 6 TCS_Y
D-GND 4 7 D-GND24V3 2 5 24V335
37 DVSET_C
39 3324V3
TCS_C
D-GND
TSG_C
7 6 5 8 24V3
4 D-GND 7
3 DVTYP_Y 824V36
TSG_BK
5VN D-GND
DVTYP_K
9 8
10
5 24V3
TCS_M
TSG_M
D-GND
DVTYP_M4
6 D-GND
40 5VN 7 TCS_Y 4
5 D-GND 6
6 TSG_YTCS_Y 424V3
TCS_K 5 3
D-GND 7
11
3
4
625
27
31
29
D-GND
DVTYP_C
5VN
24V3 36
8 TCS_M
D-GND
18 DVSET_M
24V2 326
D-GND
38 DVSET_Y 32
36 DVTYP_Y 30 TSG_Y
34 D-GND 28 TCS_M 3 TCS_M19 5VN9
D-GND
17TSG_BK
13
DVTYP_K 15
DVSET_K 5
7 8
18
1 D-GND
42
3
4 5VN 2
3DVTYP_K D-GND 4
DVTYP_K 3
DVSET_K 2
5VN 1
10 TSG_C
D-GND
DVTYP_C
DVSET_C5
7
8
9 D-GND
8
16
4 TSG_C
D-GND
DVTYP_C
DVSET_C 3
5VN 44 4 1
D-GND 41
2 8 TSG_C
5VN 1 DVTYP_C 3
DVSET_C 2
16 DVTYP_M 12
10 TSG_M
14 D-GND
5VN 1 DVSET_M 2
20 5VN 5VN 5VN 101 DVSET_M D-GND 4
DVTYP_M 3
8
9 TSG_M 1
DVSET_M 25
7
2 TSG_M5
6
4
3
3
4 8
1
2
3
48
D-GND
DVTYP_M
2 DVSET_Y 9
1 5VN 10 TSG_Y 1 8 TSG_Y 8
1 D-GND 1
D-GND 4
2 DVTYP_Y
3
3 DVSET_Y 3
4
5VN 1 DVSET_Y 2
4 5VN2
DVTYP_Y6
PCU PWB
CN9
B3P-PH-K-S
AC PWB CN1
BS-K(SPRING) BS-K
B6P-PH-K-SCN26
BS-C(SPRING) BS-C
BS-M(SPRING) BS-M
B32B-PHDSS-B BS-Y(SPRING) BS-Y1INT24V2
HV_REM#6
5
4
3
2
1 /HV_DATA#
/HV_CLK#
/HV_LD1#INT24V2
P-GND
/HV_CLK#
/HV_LD1#
HV_REM# 20
21
22
23
24
MC PWB
P-GND
/HV_DATA#
DVM_CL
DVM_K
BS_K BS_M
BS_C BS_Y
DVTYP_K DVTYP_M DVTYP_Y
DVTYP_C
TCS_K 1
TCS_M
TCS_C
BLACK
CYAN
MAGENTA
YELLOW
TCS_Y
1
1
12
2
2
2 
						

							MX-2300/2700 N/G  DEVELOPING SECTION  K – 2
2. Operational descriptions
Electrostatic latent images generated on the OPC drum by the
laser (writing) units (laser image ray) are converted into visible
images by toner.
Toner and carrier in the developing unit are agitated and trans-
ported by the mixing roller.
By mixing and transporting, toner and carrier are negatively
charged due to mechanical friction.
The developing bias voltage (AC component and negative DC
component) is applied to the developing roller.
Negatively charged toner is attracted to the exposed section on the
OPC drum where the negative potential falls due to the developing
bias.
If the OPC drum is not exposed, the negative potential is higher
than the developing bias voltage, and toner is not attracted.
3. Disassembly and assembly
A. Developing section
(1) Developing unit
1) Open the front cabinet.
2) Remove the waste toner bottle unit. 
Signal name Name Function/Operation
DVM_CL Developer motor (color) Color developing unit drive
DVM_K Developer motor (black) Black developing unit drive
BS Developer bias (Y, M, C, K) Developer bias
TCS Toner density sensor (Y, M, C, K) Controls the toner density in the developing unit. 
DVTYP DV initial detection PWB (Y, M, C, K) Detection of a new developing unit (machine exclusive for CRU)
No. Name Function/Operation
1 Developer roller Latent electrostatic images on the OPC drum are changed to visible images.
2 Stirring roller Stirring developer
3 Toner filter Prevents dispersing of toner.
Unit Parts Maintenance
(1) Developing 
unita Developer▲
b DV seal▲
c DV side seal F▲
d DV side seal R▲
e DV initial PWB
f Density sensor
g Toner filter▲
(1)-a(1)-c (1)-g(1)
(1)-b
(1)-e
(1)-f (1)-d
1
2 
						

							MX-2300/2700 N/G  DEVELOPING SECTION  K – 3 3) Check that the lock is released as shown in (A). 
Loosen the blue screw, and open the drum positioning unit. 
* When the lock is not released, use a screwdriver to turn the
screw (B) counterclockwise so that it is fit as (A). 
4) Open the DV lock lever, and release the fixing screw. (1 posi-
tion for each color)
5) Pinch the knob and remove the development unit.a. Developer
1) Remove the developing unit.
2) Remove two fixing screws of the DV cover.
3) Hold the sections A, and remove the DV cover in the arrow
direction (B).
A
B
1
2
B
A
BA
A