Read Sharp AR-M550 (serv.man21) Service Manual online
AR-M550/M620 SIGNAL NAME LIST 14 - 4
F2
Operation panel LED matrix
signal 2
signal 2
Switching
—
—
1
82
SCN
F3
Operation panel LED matrix
signal 3
signal 3
Switching
—
—
1
84
SCN
FBIAS
Fusing bias output control
signal
signal
Fusing bias output ON/OFF
control
control
ON
OFF
7
23
PCU
FRDY
FAX LED lighting signal
LED lighting control in power
save mode, iFAX, FAX
nighttime mode
save mode, iFAX, FAX
nighttime mode
LED ON
9
14
SCN
FRM_CCD1
CCD image data effective area
signal (CCD)
signal (CCD)
CCD image data effective area
control (CCD)
control (CCD)
—
—
1
61
SCN
FRM_CCD2
CIS image data effective area
signal (CIS)
signal (CIS)
CIS image data effective area
control (CIS)
control (CIS)
—
—
10
10
SCN
FUM
Fusing motor control signal
Fusing motor ON/OFF
ON
OFF
6
13
PCU
FUMCLK
Fusing motor rotating speed
control (CLK) signal
control (CLK) signal
Fusing motor control CLK
—
—
6
14
PCU
FUM-T
Fusing motor lock detection
signal
signal
Fusing motor lock detection
Rotation
Stop/Lock
6
15
PCU
FW
AC power source full wave
signal
signal
Power monitor
—
—
20
9
PCU
FW_SUB
Sub power source full wave
signal
signal
Sub power full wave signal
—
—
1
4
PCU
FWP-PCU
Flash write protect signal
Flash write protect
—
—
9
6
PCU
GBPWM
Making charger grid bias
voltage (PWM) control signal
voltage (PWM) control signal
Main charger grid bias voltage
(PWM) control
(PWM) control
—
—
15
5
PCU
HLCNT1
Upper fusing roller center
heater lamp control signal
heater lamp control signal
Upper fusing roller center
heating control
heating control
OFF
ON
2
9
PCU
HLCNT2
Upper fusing roller center
heater lamp control signal
heater lamp control signal
Upper fusing roller edges
heating control
heating control
OFF
ON
2
11
PCU
HLCNT3
Sub heat roller heater lamp
control signal
control signal
Sub heat roller heater lamp
control
control
OFF
ON
1
5
PCU
HLPRout
Fusing heater lamp power
relay control signal
relay control signal
Fusing heater lamp power
relay control
relay control
Relay OFF
Relay ON
2
5
PCU
HLPRout3
Fusing heater lamp power
relay 3 control signal
relay 3 control signal
Fusing heater lamp power
relay 3 control
relay 3 control
Relay OFF
Relay ON
2
7
PCU
HPFC
Horizontal paper transport
clutch control signal
clutch control signal
Horizontal paper transport
clutch control
clutch control
Paper
transport
—
12
7
PCU
HPLS
Paper guide lock solenoid
control signal
control signal
Paper guide lock solenoid
control
control
Lock
—
12
4
PCU
HSYNC
Horizontal sync signal
Horizontal sync
—
—
9
18
PCU
HUS-DV
Developing humidity sensor
Developing section peripheral
humidity detection
humidity detection
—
—
12
26
PCU
HUS-TC
Transfer humidity sensor
Transfer section peripheral
humidity detection
humidity detection
—
—
8
17
PCU
HVREMout
High voltage control output
control signal (MC/DV/TC)
control signal (MC/DV/TC)
High voltage ON/OFF control
signal (MC/DV/TC)
signal (MC/DV/TC)
OFF
ON
15
16
PCU
INTPR2out
Interlock power relay "RY5"
control signal
control signal
AC PWB relay "RY5" control
(38V line interlock relay)
(38V line interlock relay)
Relay OFF
Relay ON
19
19
PCU
INTPRout
Interlock power relay "RY4"
control signal
control signal
AC PWB relay "RY4" control
(38V line interlock relay)
(38V line interlock relay)
Relay OFF
Relay ON
19
15
PCU
LDON
Laser ON/OFF control signal
Laser ON/OFF control
—
—
22
27
PCU
LED0
Document size detection LED
control signal 1
control signal 1
Document size detection LED
control
control
—
—
3
5
SCN
LED1
Document size detection LED
control signal 0
control signal 0
Document size detection LED
control
control
—
—
3
6
SCN
LPPD
LCC paper pass detection
signal
signal
Detection of paper entry from
LCC
LCC
Paper pass
—
18
12
PCU
LSU_S/H
Laser beam horizontal sync
signal
signal
Laser beam horizontal position
timing control
timing control
—
—
22
25
PCU
M1LUD
Paper tray upper limit detection
signal (Paper feed tray 3)
signal (Paper feed tray 3)
Paper tray upper limit detection
(Paper feed tray 3)
(Paper feed tray 3)
Upper limit
—
16
13
PCU
M1LUM
Lift-up motor control signal
(Paper feed tray 3)
(Paper feed tray 3)
Lift-up motor control (Paper
feed tray 3)
feed tray 3)
Stop
Up
16
27
PCU
M1PED
Paper empty detection signal
(Paper feed tray 3)
(Paper feed tray 3)
Paper empty detection (Paper
feed tray 3)
feed tray 3)
Paper
empty
empty
Paper
present
16
7
PCU
Signal name
Name
Function/Operation
Connector level
Connector
No.
Pin No.
PWB
name
Remark
"L"
"H"
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