AR-RP8. Service manual - Sharp Copying Equipment Service Manual (repair manual). Page 6

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AR-SP8/RP8  OPERATIONAL DESCRIPTIONS  3 - 1
[3] OPERATIONAL DESCRIPTIONS
1. Outline
It automatically copies up to 30 sheets of documents of a same size.
(Only one set of copies)
2. Document transport pass and basic 
composition
(RSPF)
(SPF)
3. Operational descriptions
4. Cases where a document jam is caused
1) When SPPD is ON (document remaining) when the power is
turned on.
2) When SPPD is not turned ON within about 1.5 sec (at 100% copy)
after starting the document feed operation.
3) When SPPD is not turned on within about 4.7 sec (at 100% copy)
after turning on SPPD.
4) When the SPF document jam release door or the OC cover is
opened during document transport (SPF motor rotating).
5. RSPF (SPF) open/close detection (book 
document detection)
RSPF (SPF) open/close detection (book document) detection is per-
formed by detecting the interval between the reference lines on the
white Mylar attached to the paper exit guide (document scanning sec-
tion) by the scanner (CCD) and detecting the varied quantity.
1
Pickup roller
2
Sheet of document for paper feed
3
Set detection ACT
4
Paper stopper
5
Document feed roller
6
Separation sheet
7
Paper entry sensor
8
PS roller D
9
Transport follower roller
10 Paper exit roller
11 Paper exit follower roller
12 Document tray
13 Switch gate (RSPF)
1
4
3
5
6 7
12
8
9
2
11
13 10
2
1
3
4 5
6
7
8
9
10
11
12
SPID ON
PSW ON
MIRM rotation
MM rotation
CPFS ON
SPFM rotation
SPUS ON
Document set
Document set sensor
Document feed unit lamp ON
PPD ON
RRC ON
SPPD ON
POD ON
Copy start
The scanner is shifted
to the exposure position.
(Copier side)
Main motor rotation
Paper feed
Synchronization
(Transfer)
(Fusing)
(Document exit)
Paper transport
(Exposure)
In the zooming mode, the magnification ratio in the sub 
scanning direction (paper transport direction) is adjusted
by changing the document transport speed.
(Paper exit)
SPF motor rotation
Document feed
Document transport sensor
Document transport
(SPF side)
Time chart (Tray feed)
752msec
625msec
756msec
PSW
MIRR M
SPF M
CL
SPUS
SPPD
SCANST
MAIN M
CPFS1
RRS
PPD1
PPD2
POD
B
A
B
A
A - B = Varied quantity of pixels
(pixel)
(Floating)
(White Mylar)
(CCD)
Reference line
Reference line
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