Sharp MX-DE28 (serv.man2) Service Manual ▷ View online
MX-DE28 MAINTENANCE 3 – 8
(2) Separation roller, Torque limiter
1) Pull out the tandem tray.
2) Open the right door.
3) Remove the separation roller.
4) Remove the torque limiter.
C.Tandem horizontal transport section
(1) Horizontal transport roller L, Horizontal transport
roller R
roller R
1) Remove the paper feed tray.
2) Clean the horizontal transport roller L and the horizontal trans-
port roller R.
(2) Separation roller, Torque limiter
1) Open the right door.
2) Clean the transport roller 3.
ĭ
No.
Name
1
Horizontal transport roller L
2
Horizontal transport roller R
3
Transport roller 3
1
2
3
MX-DE28 MAINTENANCE 3 – 9
D.Tandem off-center adjustment
1) Loose the 4 red screws at the font and the rear of the tandem
tray.
To adjust the off-center, make the width of the plate shown in the
figure and the paper length + 1mm being the same length.
figure and the paper length + 1mm being the same length.
Paper length +1mm
Plate
Red screw
Red screw
Plate
MX-DE28 ELECTRICAL SECTION 4 – 1
MX-DE28
Service Manual
[4] ELECTRICAL SECTION
1. Block diagram
A
A
B
B
C
C
D
D
E
E
4
4
3
3
2
2
1
1
AC N
AC L
L
CAL
CA
N
CAN
CA
/RxD_LCC
/TxD_LCC
/DSR_LCC
/TRC_LCC
/DTR_LCC
RES_LCC
+2
4V
+5
V
+5
V
+24V
1/21/21/2
MX-DE28
+24V
+24V
+24V
GND
+5V
+5V
+5V
+5V
+5V
3
LCC
2
C2PFC
C2PUC
C2LUM
Paper feed tray 2 transport clutch
Paper feed tray 2 paper feed clutch
Paper feed tray 2 lift-up motor
C2SS3
C2SS4
C2SS2
C2SSSET_D
C2SS1
2CS size detection PWB UN
Paper feed tray 2 attachment detection detector
Paper feed tray 2 paper rear edge detector 1
Paper feed tray 2 paper rear edge detector 2
Paper feed tray 2 paper rear edge detector 3
Paper feed tray 2 paper rear edge detector 4
C2SPD
DSW_C2
C2PFD
C2PED
C2LUD
Paper feed tray 2 paper level detector
Paper feed tray 2 open/close detection detector
Paper feed tray 2 paper transport detector
Paper feed tray 2 paper empty detector
Paper feed tray 2 upper limit detector
WH-CS2 Dehumidifying heater (Upper)
Saf
ety g
rounding
Saf
ety g
rounding
Main unit
MX-DE28 ELECTRICAL SECTION 4 – 2
A
A
B
B
C
C
D
D
E
E
4
4
3
3
2
2
1
1
/DPFM
-CL
K
/DPFM
-E
N
DPFM-T
/DTR_DSK
/RxD_DSK
RES_DSK
/TRC_DSK
/DSR_DSK
/TxD_DSK
AC N
AC L
AC N
AC L
+5
V
+2
4V
2/22/22/2
MX-DE28
DPFM
+24V
TANDEM MAIN PWB
CPU(ATSAMD20J16A-AU)
DPTRC
+24V
D1PFC
+24V
+24V
D2PFC
D1LM
+24V
+24V
D2LM
3
Xtal(12.288MHz)
WH-DSK
WH-DSK2
D1PFD
+5V
+5V
D1PPD1
Paper feed tray 4 paper pass detector
Paper feed tray 3 paper pass detector 1
D1PPD2
+5V
Paper feed tray 3 paper pass detector 2
D1LUD
+5V
D2LUD
+5V
Paper feed tray 3 upper limit detector
Paper feed tray 4 upper limit detector
D1PED
+5V
D2PED
+5V
Paper feed tray 3 paper empty detector
Paper feed tray 4 paper empty detector
D1PQD
+5V
D2PQD
+5V
Paper feed tray 3 paper quantity detector
Paper feed tray 4 paper quantity detector
+5V
DHOD
+5V
D1CDT
Horizontal transport open/close detector
Paper feed tray 3 installation detector
(ULN2003AFWG)
+5V
D2CDT
Paper feed tray 4 installation detector
Desk paper feed motor
Desk paper transport clutch
Paper feed tray 3 paper feed clutch
Paper feed tray 2 transport clutch
Paper feed tray 3 lift-up motor
Paper feed tray 4 lift-up motor
Transistor array
Sensor input circuit
Lift motor drive circuit
Lift motor drive circuit
Output buffer
Output buffer
Input buffer
Input buffer
Input buffer
Input buffer
Output buffer
Warm heater(Lower1)
Warm heater(Lower2)
Saf
ety g
rounding
On board writing circuit
㻹㼍㼕㼚㻌㼡㼚㼕㼠㻹㼍㼕㼚㻌㼡㼚㼕㼠
㻹㼍㼕㼚㻌㼡㼚㼕㼠
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