Sharp AR-651 (serv.man23) Service Manual ▷ View online
AR-651/810 GENERAL OPERATIONS 4 - 4
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22
536
1365
1423
1906
236
1365
250
3680
220
830
260
830
890
1790
1280
1830
1270
1780
260
3240
3330
430
260
4040
2980
2470
Timing chart for copying one A4 sized sheet fed from the 1st cassette
Scanner motor
Exposure lamp
Drum motor
1st cassette feed clutch
1st cassette feed sensor
Registration sensor
Registration motor
MVDEN signal
Main charger
Developer bias
Discharge lamp
Exit sensor
Forward rotation
Reverse rotation
(ms)
AR-651/810 GENERAL OPERATIONS 4 - 5
4. 2. 4. Bypass copying
(1) Paper inserted into bypass feed tray.
•
SFB feed sensor turned ON
~ “READY FOR BYPASS FEEDING” displayed
(2) [START] key pressed
•
“READY FOR BYPASS FEEDING” display changed to “COPYING”
•
Main charger, developer bias and discharge lamp turned ON/Each fan rotating at a high speed
•
Drum, developer unit, transfer belt, and fuser roller rotating
(3) Sheet-bypass feeding
•
Bypass pickup solenoid turned ON and feed motor rotating in reverse
~ Bypass pickup roller lowered
•
Bypass feed clutch turned ON
~ Bypass feed roller, paper feed roller, and separation roller rotating
•
Aligning operation
•
Paper reaching registration roller
•
Bypass pickup solenoid, feed motor and bypass feed clutch turned OFF in a certain period of
time later
(4) Same operations as (3) through (6) of cassette feed copying with [START] key ON carried out
4. 2. 5. Interrupt copying
(1) [INTERRUPT] key pressed
•
Interruption lamp turned ON
•
Copying operation temporarily halted and carriages-1 and -2 returning to their home position
•
“JOB INTERRUPTED JOB 1 SAVED” displayed
•
Copying mode set to automatic density and 1-to-1 reproduction ratio and copy quantity indicator
unchanged
(2) Preferred copying modes specified
(3) After an interrupt copying is terminated:
•
“PRESS INTERRUPT TO RESUME JOB 1” displayed
•
Interruption lamp turned OFF/Copier returning to conditions before interruption when [INTERRUPT]
key is pressed again
•
“READY TO RESUME JOB 1” displayed
(4) [START] key pressed
•
Back to copying operation before interruption
AR-651/810 GENERAL OPERATIONS 4 - 6
4. 3. Abnormality Detection
When an abnormality occurs in the copier, a symbol corresponding to the type of the abnormality is
displayed to draw the operator’s attention.
4. 3. 1. Abnormality classification
A) Abnormalities which can be cleared without resetting the door switch
(1) Add paper
(2) Paper misfeed in bypass
(3) Set key copy counter
B) Abnormalities which cannot be cleared without resetting the door switch.
(1) Misfeed in copier
(2) Developer unit not installed properly
(3) Add toner
C) Abnormalities which cannot be cleared without turning OFF the main switch
(1) Call for service
4. 3. 2. Abnormality description
A-1) Add paper
Empty sensor detects the presence or absence of paper.
[When cassette is not installed]
No Cassette detected
훹
Tray not going up (empty sensor OFF)
훹
“Add paper” displayed
훹
[START] key disabled
[When cassette is installed]
Cassette detected
훹
Tray going up (empty sensor OFF)
훹
“Add paper” displayed
훹
[START] key disabled
AR-651/810 GENERAL OPERATIONS 4 - 7
•
When power is turned ON or feed unit initializing is operated:
↓
Presence or absence of paper detected
Tray motor ON ~ Tray going up
When tray-up sensor is not turned ON within a certain period of time:
Tray being abnormal
“Add paper” displayed regardless of paper being present
or not
Turn ON and OFF the power to clear this condition.
When tray-up sensor is turned ON within a certain period of time:
~ Tray motor stopping
At this time, if empty sensor is ON ~ Determined there is a paper
if empty sensor is OFF ~ Determined there is no paper
↓
“Add paper” display blinked
•
When the remaining sheets of paper are getting short during copying:
→
Tray-up sensor turned OFF
→
Tray-up motor turned ON ~ Tray going up
→
Tray-up sensor turned ON
→
Tray motor stopping
•
When empty sensor is turned OFF despite tray-up sensor being ON during copying:
↓
Determined there is no paper
↓
“Add paper” display blinked
↓
Copying stopped
↔
↓
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