DOWNLOAD Sharp AR-M550 (serv.man21) Service Manual ↓ Size: 487.02 KB | Pages: 15 in PDF or view online for FREE

AR-M550/M620  SIGNAL NAME LIST  14 - 10

THPS1

Transfer belt contact/
separation home position 
sensor 1

Transfer belt separation home 
position detection 1

—

Contact

7

6

PCU

Not used.

THPS2

Transfer belt contact/
separation home position 
sensor 2

Transfer belt separation home 
position detection 2

—

Contact

7

14

PCU

TH-RA

Machine temperature detection 
signal

Machine temperature detection

—

—

21

10

PCU

THV+PWM

Transfer charger output control 
signal (THV)

Transfer charger output control 
(PWM control)

—

—

15

8

PCU

THV+REM

Transfer charger control signal 
(THV)

Transfer charger ON/OFF 
control

ON

OFF

15

9

PCU

TLS

Waste toner pipe lock detection 
signal

Waste toner pipe lock detection

—

Lock (Tilt)

8

16

PCU

TM1A

Toner motor 1 control signal

Toner motor 1 ON/OFF control

—

—

11

1

PCU

TM1B

Toner motor 1 control signal

Toner motor 1 ON/OFF control

—

—

11

3

PCU

TM2A

Toner motor 2 control signal

Toner motor 2 ON/OFF control

—

—

11

5

PCU

TM2B

Toner motor 2 control signal

Toner motor 2 ON/OFF control

—

—

11

7

PCU

TNCA

Waste toner full detection 
signal

Waste toner full detection

—

—

11

12

PCU

Not used.

TRC_LCC

LCC paper feed timing signal

LCC paper feed timing control 
(Output from PCU)

—

—

18

13

PCU

TRMA

Transfer roller 15 drive motor 
control signal (Phase A)

Transport roller 15 drive motor 
control

—

—

10

17

PCU

TRMB

Transfer roller 15 drive motor 
control signal (Phase B)

Transport roller 15 drive motor 
control

—

—

10

19

PCU

TRMXA

Transfer roller 15 drive motor 
control signal (Phase /A)

Transport roller 15 drive motor 
control

—

—

10

18

PCU

TRMXB

Transfer roller 15 drive motor 
control signal (Phase /B)

Transport roller 15 drive motor 
control

—

—

10

20

PCU

TSGOUT

Toner den misty sensor gain 
control signal

Toner density sensor gain 
control

—

—

12

20

PCU

TURM

Transfer separation motor 
control signal

Transfer unit separation control

Stop

Contact/
Release

7

16

PCU

TXD_CCD1

Serial I/F data (CCD)

Serial I/F data (Scanner control 
PWB - CCD)

—

—

1

63

SCN

TXD_CCD2

Serial I/F data (CCD)

Serial I/F data (Scanner control 
PWB - CCD)

—

—

10

14

SCN

TXD_FIN

Serial I/F data (Finisher)

Serial I/F data (PCU PWB - 
Finisher)

—

—

17

11

PCU

TXD_LCC

Serial I/F data (LCC)

aerial I/F data (Controller - 
Scanner control PWB)

—

—

18

3

PCU

TXD_SCN

Serial I/F data (Scanner control 
PWB)

Serial I/F data (Controller - 
Scanner control PWB)

—

—

9

8

SCN

VCCW_SCN Scanner flash ROM write 

protect signal

Scanner flash ROM write 
protect

Write 

enable

9

10

SCN

VFM-BKL

Exhaust fan motor control 
signal (Rear left)

Exhaust fan motor control 
signal (O

3

 exhaust, process 

section heat exhaust)

Max. force 

of wind

Stop

5

22

PCU

VFM-BKR

Exhaust fan motor control 
signal (Rear right)

Exhaust fan motor control 
signal (Exhaust, duplex (ADU) 
section cooling)

Max. force 

of wind

Stop

6

17

PCU

VFM-EX1

Exhaust fan motor control 
signal (LSU top plate front 
side)

Exhaust fan motor control 
signal (O

3

 exhaust, process 

section heat exhaust)

Max. force 

of wind

Stop

5

4

PCU

VFM-EX2

Exhaust fan motor control 
signal (LSU top plate center)

Exhaust fan motor control 
signal (O

3

 exhaust, process 

section heat exhaust)

Max. force 

of wind

Stop

5

10

PCU

VFM-EX3

Exhaust fan motor control 
signal (LSU top plate rear side)

Exhaust fan motor control 
signal (O

3

 exhaust, process 

section heat exhaust)

Max. force 

of wind

Stop

5

16

PCU

VIDEO

Image signal

Image signal to LSU

—

—

20

21

PCU

VIDEOin-

Image signal

Image signal from controller to 
PCU PWB

—

—

9

21

PCU

Signal name

Name

Function/Operation

Connector level

Connector 

No.

Pin No.

PWB 

name

Remark

"L"

"H"

AR-M550/M620  SIGNAL NAME LIST  14 - 11

∗∗∗∗

∗∗∗∗

VIDEOin+

Image signal

Image signal from controller to 
PCU PWB

—

—

9

23

PCU

VPMA

Paper transport motor control 
signal (Phase A)

Paper vertical transport motor 
control (Phase A)

—

—

10

21

PCU

VPMB

Paper transport motor control 
signal (Phase B)

Paper vertical transport motor 
control (Phase B)

—

—

10

23

PCU

VPMXA

Paper transport motor control 
signal (Phase /A)

Paper vertical transport motor 
control (Phase /A)

—

—

10

22

PCU

VPMXB

Paper transport motor control 
signal (Phase /B)

Paper vertical transport motor 
control (Phase /B)

—

—

10

24

PCU

VRB

Laser power control signal

Laser power control

—

—

22

17

PCU

WAKE UP

Reset trigger signal from 
energy-saving mode

Reset trigger from energy 
saving mode

Energy-

save reset

9

11

SCN

WHPR2

Dehumidifier heater power 
relay 2 control signal

Dehumidifier heater control

Relay ON

Relay OFF

19

18

PCU

XH

Touch panel area identification 
signal (Vertical direction)

Touch panel area identification 
(Vertical direction) X axis

—

—

1

96

SCN

XL

Touch panel coordinates signal 
(Vertical direction)

Touch panel coordinates 
identification (Vertical direction) 
X axis

—

—

1

46

SCN

YH

Touch panel area identification 
signal (Horizontal direction)

Touch panel area identification 
(Horizontal direction) Y axis

—

—

1

45

SCN

YL

Touch panel coordinate signal 
(Horizontal direction)

Touch panel coordinates 
identification (Horizontal 
direction) Y axis

—

—

1

95

SCN

Vertical size detection: Connector level

Paper size

Multi-stage tray 1

M1SS1

M1SS2

M1SS3

M1SS4

AB series

Inch series

China series

Multi-stage tray 2

M2SS1

M2SS2

M2SS3

M2SS4

1

L

L

H

L

B5

Extra

K16

2

H

L

H

L

A4

A5R

LT

INVR

A4

A5R

3

H

L

L

L

B5R

EX-R

K16R

4

H

H

L

L

A4R

LTR

A4R

5

L

H

L

L

Foolscap

Extra

Foolscap

6

L

H

L

H

B4

LGL

K8

7

L

L

L

H

A3

WLT

0

H

H

H

H

Tray not installed

No.

CV_SIZE3

CV_SIZE2

CV_SIZE1

CV_SIZE0

Paper size

0

0

0

0

0

none

1

0

0

0

1

A3

2

0

0

1

0

A4

3

0

0

1

1

LT

4

0

1

0

0

B4

5

0

1

0

1

LG

6

0

1

1

0

WLT

7

0

1

1

1

INV

8

1

0

0

0

B5

9

1

0

0

1

Extra

10

1

0

1

0

A5

11

1

0

1

1

F4

12

1

1

0

0

A4R

13

1

1

0

1

B5R

14

1

1

1

0

LTR

15

1

1

1

1

A5R

Signal name

Name

Function/Operation

Connector level

Connector 

No.

Pin No.

PWB 

name

Remark

"L"

"H"

The PWB’s of this model employs lead-free solder. The “LF” marks indicated on the PWB’s and the Service Manual mean “Lead-Free” solder. 

The alphabet following the LF mark shows the kind of lead-free solder.

When repairing a lead-free solder PWB, use lead-free solder thread.

Never use conventional lead solder thread, which may cause a breakdown or an accident.
Since the melting point of lead-free solder thread is about 40°C higher than that of conventional lead solder thread, the use of the exclusive-use

soldering iron is recommendable.

Since the melting point of lead-free solder is about 220°C, which is about 40°C higher than that of conventional lead solder, and its soldering capacity is
inferior to conventional one, it is apt to keep the soldering iron in contact with the PWB for longer time. This may cause land separation or may exceed

the heat-resistive temperature of components. Use enough care to separate the soldering iron from the PWB when completion of soldering is

confirmed.
Since lead-free solder includes a greater quantity of tin, the iron tip may corrode easily. Turn ON/OFF the soldering iron power frequently.

If different-kind solder remains on the soldering iron tip, it is melted together with lead-free solder. To avoid this, clean the soldering iron tip after

completion of soldering work.

If the soldering iron tip is discolored black during soldering work, clean and file the tip with steel wool or a fine filer.

5mm

Lead-Free

Solder composition
code (Refer to the
table at the right.)

Solder composition

Sn-Ag-Cu

Sn-Ag-Bi
Sn-Ag-Bi-Cu

Sn-Zn-Bi

Sn-In-Ag-Bi

Sn-Cu-Ni

Sn-Ag-Sb

Bi-Sn-Ag-P
Bi-Sn-Ag

a

b

z

i

n

s

p

Solder composition code

a