Read Sharp AR-M550 (serv.man21) Service Manual online
AR-M550/M620 SIGNAL NAME LIST 14 - 5
M1PFC
Paper feed clutch (M1) control
signal (Paper feed tray 3)
signal (Paper feed tray 3)
Paper feed tray 3 paper feed
control
control
Paper
transport
—
16
25
PCU
M1PFD
Paper pass detection signal
(Multi paper feed tray 3)
(Multi paper feed tray 3)
Paper feed tray 3 paper pass
detection
detection
Paper pass
—
16
21
PCU
M1PUS
Paper pickup solenoid control
signal (Paper feed tray 3)
signal (Paper feed tray 3)
Paper pickup roller control
(Paper feed tray 3)
(Paper feed tray 3)
Roller UP
Paper feed
16
3
PCU
M1PWS
Paper feed tray paper width
detection signal (Paper feed
tray 3)
detection signal (Paper feed
tray 3)
Multi paper feed tray paper
width detection (Paper feed
tray 3)
width detection (Paper feed
tray 3)
—
—
16
32
PCU
M1SPD
Paper remaining quantity
detection signal (Paper feed
tray 3)
detection signal (Paper feed
tray 3)
Paper remaining quantity
detection (Multi paper feed tray
3)
detection (Multi paper feed tray
3)
—
Remaining
paper
quantity
66% or less
15
31
PCU
M1SS1
Paper size detection signal
(Paper feed tray 3)
(Paper feed tray 3)
Paper size detection (Paper
feed tray 3)
feed tray 3)
15
21
PCU
Refer to the
separate
table (
separate
table (
∗
1)
M1SS2
Paper size detection signal
(Paper feed tray 3)
(Paper feed tray 3)
Paper size detection (Paper
feed tray 3)
feed tray 3)
15
23
PCU
M1SS3
Paper size detection signal
(Paper feed tray 3)
(Paper feed tray 3)
Paper size detection (Paper
feed tray 3)
feed tray 3)
15
25
PCU
M1SS4
Paper size detection signal
(Paper feed tray 3)
(Paper feed tray 3)
Paper size detection (Paper
feed tray 3)
feed tray 3)
15
27
PCU
M2LUD
Paper tray upper limit detection
signal (Paper feed tray 4)
signal (Paper feed tray 4)
Paper tray upper limit detection
(Paper feed tray 4)
(Paper feed tray 4)
Upper limit
—
16
14
PCU
M2LUM
Lift-up motor control signal
(Paper feed tray 4)
(Paper feed tray 4)
Lift-up motor control (Paper
feed tray 4)
feed tray 4)
Stop
Up
17
1
PCU
M2PED
Paper empty detection signal
(Paper feed tray 4)
(Paper feed tray 4)
Paper empty detection (Paper
feed tray 4)
feed tray 4)
Paper
empty
empty
Paper
present
16
8
PCU
M2PFC
Paper feed clutch (M1) control
signal (Paper feed tray 4)
signal (Paper feed tray 4)
Paper feed tray 4 paper feed
control
control
Paper
transport
—
17
7
PCU
M2PFD
Paper pass detection signal
(Multi paper feed tray 4)
(Multi paper feed tray 4)
Paper feed tray 4 paper pass
detection
detection
Paper pass
—
16
22
PCU
M2PUS
Paper pickup solenoid control
signal (Paper feed tray 4)
signal (Paper feed tray 4)
Paper pickup roller control
(Paper feed tray 4)
(Paper feed tray 4)
Roller UP
Paper feed
16
4
PCU
M2SPD
Paper remaining quantity
detection (Paper feed tray 4)
signal
detection (Paper feed tray 4)
signal
Paper remaining quantity
detection (Paper feed tray 4)
detection (Paper feed tray 4)
—
Remaining
paper
quantity
66% or less
15
32
PCU
M2SS1
Paper size detection signal
(Paper feed tray 4)
(Paper feed tray 4)
Paper size detection (Paper
feed tray 4)
feed tray 4)
15
22
PCU
Refer to the
separate
table (
separate
table (
∗
1)
M2SS2
Paper size detection signal
(Paper feed tray 4)
(Paper feed tray 4)
Paper size detection (Paper
feed tray 4)
feed tray 4)
15
24
PCU
M2SS3
Paper size detection signal
(Paper feed tray 4)
(Paper feed tray 4)
Paper size detection (Paper
feed tray 4)
feed tray 4)
15
26
PCU
M2SS4
Paper size detection signal
(Paper feed tray 4)
(Paper feed tray 4)
Paper size detection (Paper
feed tray 4)
feed tray 4)
15
28
PCU
MFPUS
Paper pickup solenoid (MFP)
control signal (Manual paper
feed)
control signal (Manual paper
feed)
Paper pickup solenoid (MPF)
control (Manual paper feed)
control (Manual paper feed)
Paper feed
with the
roller down
—
13
7
PCU
MHPS
Scanner home position sensor
signal
signal
Scanner home position
detection
detection
Home
position
6
1
SCN
MHVREM
Main charger control signal
Main charger ON/OFF
ON
OFF
15
6
PCU
MHV-T
Main charger trouble detection
signal
signal
Main charger trouble detection
Trouble, no
MHV
Normal
15
7
PCU
MIMA
Scanner motor control signal
(Phase A)
(Phase A)
Scanner motor control (Phase
A)
A)
—
—
7
1
SCN
MIMB
Scanner motor control signal
(Phase B)
(Phase B)
Scanner motor control (Phase
B)
B)
—
—
7
2
SCN
MM
Main motor control signal
Main motor ON/OFF control
ON
OFF
17
14
PCU
MMCLK
Main motor rotating speed
control (CLK) signal
control (CLK) signal
Main motor RPM control
—
—
17
16
PCU
MM-T
Main motor lock detection
signal
signal
Main motor lock detection
Rotation
Stop/Lock
17
18
PCU
MPED
Manual feed paper empty
detection signal
detection signal
Manual paper feed tray paper
empty detection
empty detection
Paper
empty
empty
Paper
present
13
11
PCU
Signal name
Name
Function/Operation
Connector level
Connector
No.
Pin No.
PWB
name
Remark
"L"
"H"
Click on the first or last page to see other AR-M550 (serv.man21) service manuals if exist.