Sharp AR-C170 (serv.man24) Service Manual ▷ View online
AR-C170M DESCRIPTIONS OF EACH SECTION 7 - 41
6. RSPF section
A. Operational descriptions
(1) Electrical section and mechanical section
(4) Operational descriptions
a. Major parts of the paper feed section
L1
P0
PAPER
COVER
OPEN
L2
PSOL
RSOL
GSOL
MOT
CLH
CN6
(20pin)
(20pin)
CN1
(3pin)
(3pin)
CN2
(3pin)
(3pin)
CN7
(3pin)
(3pin)
CN4
(2pin)
(2pin)
CN3
(7pin)
(7pin)
5
1
7
9
3
20
14
6
11
2
15
16
4
13
17
18
8
19
10
12
1
2
3
1
2
1
2
3
W0
5V
W1
W2
W3
SPFCOVER
SGND
W0
5V
W1
W2
W3
SPFCOVER
SGND
W0
5V
W1
W2
W3
SPFCOVER
SGND
/PSOL
24V1
5V
L1
SGND
5V
L2
SGND
SGND
pull up
PAPER
SGND
/SPFOUT
5V
SGND
SPFOPEN
5V
1
2
3
24V1
N.C.
/CLH
1
2
3
24V1
N.C.
/CLH
1
2
3
4
5
6
7
A
/A
B
/B
N.C.
24V1
24V1
1
2
3
4
5
6
7
A
/A
B
/B
N.C.
24V1
24V1
24V1
/GSOL
SGND
pull up
PAPER
/RSOL
24V1
(7pin)
1
2
3
4
5
6
7
1
2
3
4
5
6
7
1
2
3
4
5
6
7
1
2
5
6
3
4
5V
L1
L2
SGND
SGND
5V
5V
L1
L2
SGND
SGND
5V
(6pin)
6
5
2
1
4
3
(6pin)
(7pin)
(7pin)
2
1
3
1
3
2
/PSOL
24V1
/PSOL
24V1
2
1
1
2
/PSOL
24V1
2
1
/RSOL
24V1
/RSOL
24V1
1
2
1
2
2
1
3
(3pin)
(2pin)
(2pin)
SGND
SPFOPEN
5V
2
3
1
(3pin)
SGND
/SPFOUT
5V
2
3
1
(3pin)
(2pin)
(2pin)
(3pin)
(7pin)
(2pin)
(2pin)
(3pin)
Transport unit
Interface PWB
Sensor
PWB
Paper feed unit
Drive unit
NO.
Part name
Operations, etc.
1
Document length
sensor (L2)
sensor (L2)
Detects the document length of
the tray.
the tray.
2
Document length
sensor (L1)
sensor (L1)
Detects the document length of
the tray.
the tray.
3
Document set sensor
(W0)
(W0)
Detects presence of a document.
4
Document width sensor
(W1, W2, W3)
(W1, W2, W3)
Detects the document width.
5
Pickup roller
Picks up a document.
6
Paper feed roller
Feeds and transports a document.
1
2
3,4 5 6
7 8
9
10
11
13
14
15
16
17
12
7
Paper entry sensor
(PAPER)
(PAPER)
Detects transport of a document.
8
PS roller
Synchronizes the document lead
edge and the image lead edge.
edge and the image lead edge.
9
PS follower roller
Synchronizes the document lead
edge and the image lead edge.
edge and the image lead edge.
10 Transport roller
Transports a document.
11 Transport follower roller Transports a document.
12 Paper exit sensor (P0)
Detects transport of a document.
13 Paper exit follower roller Discharges a document.
14 Paper exit roller
Discharges a document.
15 Reverse gate
Opens/closes the document
reverse path.
reverse path.
16 Paper exit gate
Switches the discharged paper
path to the intermediate tray or to
the paper exit tray.
path to the intermediate tray or to
the paper exit tray.
17 Intermediate tray
Discharges paper to the
intermediate tray in document
reverse operation.
intermediate tray in document
reverse operation.
NO.
Part name
Operations, etc.
AR-C170M DESCRIPTIONS OF EACH SECTION 7 - 42
b. Operation process
[Duplex document]
c. Document size detection
<1> The document size is detected on the document set tray.
When a document is set on the document set tray with the
paper/copy magnification ratio set in the auto mode, the doc-
ument size is detected to operate the automatic selection
function of paper and copy magnification ratio for the docu-
ment size. When different sizes of documents are set in this
detection method, the max. size of document is detected.
paper/copy magnification ratio set in the auto mode, the doc-
ument size is detected to operate the automatic selection
function of paper and copy magnification ratio for the docu-
ment size. When different sizes of documents are set in this
detection method, the max. size of document is detected.
The document width is detected with the document width
sensors (W1, W2, and W3), and the document length is
detected with the document length sensors (L1 and L2) to
determine the document size. Judgment of the document
size is made at a timing after detecting the document with the
document set sensor (W0).
sensors (W1, W2, and W3), and the document length is
detected with the document length sensors (L1 and L2) to
determine the document size. Judgment of the document
size is made at a timing after detecting the document with the
document set sensor (W0).
[Note] Sensor: ON:
❍
OFF:
●
Don't case: —
1)
Document set (Document set sensor ON)
↓
2)
Document size detection (Detects the document width with
the document width sensors W1, W2, and W3 and the
document length with the document length sensors L1 and
L2.)
the document width sensors W1, W2, and W3 and the
document length with the document length sensors L1 and
L2.)
↓
3)
Complex unit copy key ON
↓
4)
RSPF motor ON
↓
5)
Pickup solenoid ON
↓
6)
Pickup roller and paper feed roller rotation
↓
7)
The paper entry sensor detects presence of a document.
↓
8)
PS roller rotation
↓
9)
Copy operation (Document surface)
↓
10) Transport roller rotation
↓
11) Paper exit roller rotation
↓
12) The paper exit gate moves down. (The document is passed
to the intermediate tray.)
↓
13) The reverse gate moves down.
↓
14) Paper exit roller reverse rotation (The document is passed to
the reverse path.)
↓
15) The paper entry sensor detects presence of a document.
↓
16) PS roller rotation
↓
17) Copy operation (Document back surface copy)
↓
18) Transport roller rotation
↓
19) Paper exit roller rotation
↓
20) The paper exit gate moves down. (The document is passed
to the intermediate tray.)
↓
21) The reverse gate moves down.
↓
22) Paper exit roller reverse rotation (The document is passed to
the reverse path.)
↓
23) The paper entry sensor detects presence of a document.
↓
24) PS roller rotation
↓
25) Paper exit roller rotation
↓
26) The paper exit gate moves up.
↓
27) The document is passed to the paper exit tray.
↓
28) Next document
→
(YES)
→
Returns to 4).
↓
(NO)
29) RSPF motor OFF
Document
width sensor
Document
width sensor
AB series
Inch series
W1
W2
W3
L1
L2
●
●
●
●
●
B5R
8.5 x 11R
❍
●
●
●
●
A5
5.5 x 8.5
—
❍
●
●
●
B5
8.5 x 11
—
—
❍
●
●
A4
8.5 x 11
●
●
●
❍
●
B5R
8.5 x 11R
❍
●
●
❍
●
A4R
8.5 x 11R
—
❍
●
❍
●
B4
11 x 17
—
—
❍
❍
●
A3
11 x 17
●
●
●
—
❍
B5R
8.5 x 14
❍
●
●
—
❍
A4R
8.5 x 14
—
❍
●
—
❍
B4
11 x 17
—
—
❍
—
❍
A3
11 x 17
AR-C170M DESCRIPTIONS OF EACH SECTION 7 - 43
B. Disassembly/assembly/maintenance
(1) Maintenance-target parts in the RSPF section
❍
: Clean
(2) Replacement procedures of maintenance parts and
major parts
[RSPF unit]
a. RSPF unit
Note: When installing, note that the grounding wire of the RSPF
unit and that of the document detection unit are tightened
together.
together.
[External fitting]
Note: Disengage the pawl in the arrow direction.
[Paper feed unit section]
a. Paper feed unit
No.
Part name
When
calling
Remark
(1)
Pickup roller
❍
(2) - 1
Separation unit
❍
Replacement when
worn down
worn down
(2) - 2
Separation sheet
❍
(3)
Paper feed roller
❍
(4)
PS roller
❍
(5)
Transport roller
❍
(6)
Paper exit roller
❍
1
2
2
3
AR-C170M DESCRIPTIONS OF EACH SECTION 7 - 44
b. Document transport section cover
c. Document feed section cover
d. Sensor PWB
e. Pickup solenoid
Note: Remove section A of the pickup solenoid from the groove in
the solenoid arm.
f. Clutch gear assembly parts
1
2
1
2
3
2
1
1
1
3
2
2
4
A
1
2
3
1
5
2
4
3
6
6
2.5 – 4.0 from
the lead edge
of the pawl
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