SHARP SF1118 Service Manual

SERVICE MANUAL

CODE: 00ZSF1118/A1E

MODEL SF-1118

		CONTENTS
[ 1 ] PRODUCT OUTLINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .				. 1	– 1
[ 2 ] PRODUCT SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .				. 2	– 1
[ 3 ] PRODUCT VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .				3	– 1
[ 4 ] UNPACKING AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .				4	– 1
[ 5 ] DESCRIPTION ON EACH SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .				5	– 1
[ 6	] DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .			6	– 1
[ 7	] ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .			7	– 1
[ 8	] SIMULATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .			8	– 1
[ 9	] SELF DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .			9	– 1
[10] MEMORY TROUBLES, FLOWCHART FOR REPLACEMENT OF
	MAIN CONTROL PWB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .			10	– 1
[11] MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .				11	– 1
[12] ELECTRICAL SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .				12	– 1

Parts marked with "!" is important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set.

SHARP CORPORATION	This document has been published to be used
	for after sales service only.
	The contents are subject to change without notice.

Contents

[1] PRODUCT OUTLINE . . . . . . . . . . . . . . . . . . . 1-1

1. Product features . . . . . . . . . . . . . . . . . . . . . . . . 1-1 2. System configuration (options) . . . . . . . . . . . . . 1-1

[2] PRODUCT SPECIFICATIONS . . . . . . . . . . 2-1

1. Basic specifications . . . . . . . . . . . . . . . . . . . . . . 2-1 2. Description of each section . . . . . . . . . . . . . . . . 2-2 3. Supply parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 4. Optional specifications . . . . . . . . . . . . . . . . . . . 2-3

(1) Automatic document feeder (ADF) . . . . . . 2-3

(2) 10-bin sorter . . . . . . . . . . . . . . . . . . . . . . . 2-3

(3) 10-bin staple sorter (10-bin SS) . . . . . . . . 2-4

(4) Exclusive-use desk . . . . . . . . . . . . . . . . . . 2-4

[3] PRODUCT VIEWS . . . . . . . . . . . . . . . . . . . . . . 3-1

1. External view and internal structure . . . . . . . . . 3-1 2. Operation panel . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 3. Clutches, solenoids, and motors . . . . . . . . . . . . 3-3 4. PWB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 5. Sensors and switches . . . . . . . . . . . . . . . . . . . . 3-5

6.Rollers, mirrors, etc. . . . . . . . . . . . . . . . . . . . . . 3-6

[4]UNPACKING AND INSTALLATION . . . . . 4-1

1. Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

2. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

(1) Environment . . . . . . . . . . . . . . . . . . . . . . . 4-1

(2) Space around the machine . . . . . . . . . . . . 4-2

(3) Installation base . . . . . . . . . . . . . . . . . . . . 4-2

(4) Power source . . . . . . . . . . . . . . . . . . . . . . 4-2

(5) Grounding wire connection . . . . . . . . . . . . 4-2 3. Optical system lock release . . . . . . . . . . . . . . . . 4-3 A. No. 2/3 mirror unit lock release . . . . . . . . . 4-3 B. Lens and No. 4/5 mirror unit lock release . 4-3

4. Charger cleaning . . . . . . . . . . . . . . . . . . . . . . . . 4-3 A. Main charger unit electrode cleaning . . . . 4-3 5. Developing unit setting . . . . . . . . . . . . . . . . . . . 4-4 A. Developing unit setting . . . . . . . . . . . . . . . 4-4

6. Toner density sensor level adjustment . . . . . . . 4-5 A. Developing unit level adjustment . . . . . . . 4-5 7. Accessory installation . . . . . . . . . . . . . . . . . . . . 4-5 A. Copier tray installation . . . . . . . . . . . . . . . 4-5

8. Toner supply . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 9. Center shift adjustment . . . . . . . . . . . . . . . . . . . 4-7 10. Label attachment . . . . . . . . . . . . . . . . . . . . . . . . 4-7 A. Label attachment . . . . . . . . . . . . . . . . . . . 4-7

[5] DESCRIPTIONS OF EACH SECTION			. . 5-1
1.	Paper feed section . . . . . . . . . . . . . . . . . . . .		. . 5-1
	1)	General descriptions . . . . . . . . . . . . . . .	. . 5-1
	2)	Basic operations . . . . . . . . . . . . . . . . . .	. . 5-1
2.	Developing section . . . . . . . . . . . . . . . . . . . .		. . 5-2
	1)	General descriptions . . . . . . . . . . . . . . .	. . 5-2
	2)	Basic composition . . . . . . . . . . . . . . . . . .	. 5-2
	3)	Basic operations . . . . . . . . . . . . . . . . . . .	. 5-3
3.	Optical section . . . . . . . . . . . . . . . . . . . . . . . . .		. 5-3
	1)	General description . . . . . . . . . . . . . . . .	. 5-3
	2)	Basic operations . . . . . . . . . . . . . . . . . . .	. 5-6
4.	Copy process . . . . . . . . . . . . . . . . . . . . . . . . .		. 5-8
	1)	Photoconductor . . . . . . . . . . . . . . . . . . .	. 5-8
	2)	Process diagram . . . . . . . . . . . . . . . . . . .	. 5-9
	3)	Details of image forming process . . . . . .	5-10
	4)	Transition of photoconductor surface
		potential . . . . . . . . . . . . . . . . . . . . . . . . .	5-14
	5)	Photoconductor drum sensitivity
		correction . . . . . . . . . . . . . . . . . . . . . . . .	5-14
	6)	Process control function . . . . . . . . . . . . .	5-14
5.	TRANSPORT/FUSING SECTION . . . . . . . . .		5-16
	1)	General . . . . . . . . . . . . . . . . . . . . . . . . . .	5-16
	2)	Basic composition and functions . . . . . .	5-16
6.	Fusing paper exit section . . . . . . . . . . . . . . . .		5-16
7.	High voltage section . . . . . . . . . . . . . . . . . . . .		5-17
	1)	General . . . . . . . . . . . . . . . . . . . . . . . . . .	5-17
	2)	Basic composition . . . . . . . . . . . . . . . . . .	5-17
[6] DISASSEMBLY AND ASSEMBLY . . . . .			. 6-1
1.	Paper feed unit . . . . . . . . . . . . . . . . . . . . . . . .		. 6-1
	1-1.	Paper feed unit . . . . . . . . . . . . . . . . . . . .	. 6-1
	1-2.	Paper feed roller ass'y removal . . . . . . .	. 6-1
	1-3.	PS front roller ass'y . . . . . . . . . . . . . . . .	. 6-2
	1-4.	Separation roller . . . . . . . . . . . . . . . . . . .	. 6-2
	1-5.	Paper feed roller, take-up roller . . . . . . .	. 6-2
2.	Transport unit . . . . . . . . . . . . . . . . . . . . . . . . .		. 6-3
	2-1.	Resist roller, transfer roller . . . . . . . . . . .	. 6-3
	2-2.	Transport belt . . . . . . . . . . . . . . . . . . . . .	. 6-4
3.	Fusing section . . . . . . . . . . . . . . . . . . . . . . . .		. 6-4
	3-1.	Fusing unit removal . . . . . . . . . . . . . . . .	. 6-4
	3-2.	Heater lamp replacement . . . . . . . . . . . .	. 6-5
	3-3.	Upper heat roller ass'y removal . . . . . . .	. 6-5
	3-4.	Upper separation pawl replacement . . . .	. 6-5
	3-5.	Lower heat roller replacement . . . . . . . .	. 6-5
	3-6.	Lower separation pawl replacement . . . .	. 6-6
	3-7.	Thermistor/thermostat removal . . . . . . . .	. 6-6
4.	Optical system . . . . . . . . . . . . . . . . . . . . . . . . .		. 6-6

	1)	Copy lamp replacement . . . . . . . . . . . . .	. 6-6
	2)	Mirror base wire replacement and
		adjustment . . . . . . . . . . . . . . . . . . . . . . .	. 6-7
	3)	No. 2/3 mirror unit (mirror base B)
		installation (Mirror base B positioning) . .	. 6-9
	4)	Copy lamp unit installation
		(Mirror base A positioning) . . . . . . . . . . .	6-10
	5)	No. 4/5 mirror unit (mirror base C)
		replacement . . . . . . . . . . . . . . . . . . . . . .	6-10
	6)	Lens wire replacement . . . . . . . . . . . . . .	6-12
	7)	Lens unit replacement . . . . . . . . . . . . . .	6-15
5.	High voltage section . . . . . . . . . . . . . . . . . . . .		6-15
	5-1.	Main charger (MC) unit . . . . . . . . . . . . . .	6-15
	5-2.	Transfer/separation charger (TC/SC)
		unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-16
6.	Process section . . . . . . . . . . . . . . . . . . . . . . .		6-17
	6-1.	Process unit . . . . . . . . . . . . . . . . . . . . . .	6-17
	6-2.	Waste toner bottle replacement
		(required when waste toner full detection/
		maintenance) . . . . . . . . . . . . . . . . . . . . .	6-17
	6-3.	Drum (Replace every 60K copies) . . . . . 6-18
	6-4.	Blank lamp unit
		(Clean every 60K copies.) . . . . . . . . . . .	6-18
	6-5.	Discharge lamp unit
		(Clean every 60K copies.) . . . . . . . . . . .	6-19
	6-6.	Cleaner blade
		(Replace every 60K copies.) . . . . . . . . . .	6-19
	6-7.	Drum separation pawl
		(Replace every 60K copies.) . . . . . . . . . .	6-19
	6-8.	Process control PWB (Clean the sensor
		section every 60K copies.) . . . . . . . . . . .	6-19
	6-9.	Drum mark sensor PWB (Clean the sensor
		section every 60K copies.) . . . . . . . . . . .	6-19
	6-10.	Toner reception seal (Replace every 60K
		copies.) . . . . . . . . . . . . . . . . . . . . . . . . . .	6-19
7.	Developing section . . . . . . . . . . . . . . . . . . . . .		6-20
	A.	DV side seals F/R replacement
		(Replace every 120K copies.) . . . . . . . . .	6-20
	B.	DB blade replacement
		(Replace every 120K copies.) . . . . . . . . .	6-20
	C.	V ring attachment . . . . . . . . . . . . . . . . . .	6-20
	D.	Note for toner hopper drive gear (31T)
		and stirring shaft attachment . . . . . . . . .	6-21
8.	Operation panel/intermediate cabinet . . . . . . .		6-21
9.	Frame major parts . . . . . . . . . . . . . . . . . . . . . .		6-21
	9-1.	Cooling fan motor replacement . . . . . . . .	6-21
	9-2.	Power unit . . . . . . . . . . . . . . . . . . . . . . . .	6-22
	9-3.	Tray size detecting PWB . . . . . . . . . . . .	6-22
	9-4.	Main PWB unit . . . . . . . . . . . . . . . . . . . .	6-23
	9-5.	AC power PWB . . . . . . . . . . . . . . . . . . . .	6-23
	9-6.	Ozone filter (Check every 60K copies,
		and clean every 300K copies.) . . . . . . . .	6-23
10.	Multi paper feed unit . . . . . . . . . . . . . . . . . . . .		6-24

		10-1.	Separation roller . . . . . . . . . . . . . . . . . . .	6-24
		10-2.	Take-up roller/paper feed roller . . . . . . .	6-24
[7]	ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . .			. 7-1
	1.	Developing section . . . . . . . . . . . . . . . . . . . . . .		7-1
		1-1.	Developing doctor clearance
			adjustment . . . . . . . . . . . . . . . . . . . . . . . .	7-1
		1-2.	Developing magnet roller main pole
			position adjustment . . . . . . . . . . . . . . . . . .	7-1
	2.	Optical system . . . . . . . . . . . . . . . . . . . . . . . . . .		7-2
		2-1.	Adjustment items . . . . . . . . . . . . . . . . . . .	7-2
		2-2.	Note for adjustments . . . . . . . . . . . . . . . .	7-3
		2-3.	Adjustment of each section . . . . . . . . . . .	7-4
		A.	Lens reference position adjustment . . . . .	7-4
		B.	No.4/5 mirror reference position
			adjustment . . . . . . . . . . . . . . . . . . . . . . . .	7-4
		C.	Vertical copy magnification ratio
			adjustment . . . . . . . . . . . . . . . . . . . . . . . .	7-5
		D.	Resolution adjustment
			(Focus adjustment) . . . . . . . . . . . . . . . . . .	7-6
		E.	Horizontal copy magnification ratio
			adjustment . . . . . . . . . . . . . . . . . . . . . . . .	7-8
		F.	Comparison table of lens values and
			simulation input values . . . . . . . . . . . . . . .	7-9
		G.	Vertical skew adjsutment . . . . . . . . . . . .	7-10
		H.	Horizontal skew adjustment . . . . . . . . . .	7-10
		I.	Center shift adjustment . . . . . . . . . . . . . .	7-12
		J.	Exposure balance adjustment . . . . . . . .	7-12
		K.	Copy lead edge adjustment . . . . . . . . . .	7-13
		2-4.	Copy density adjustment . . . . . . . . . . . .	7-16
		2-5.	Process section adjustment . . . . . . . . . .	7-20
[8]	SIMULATION . . . . . . . . . . . . . . . . . . . . . . . . . .			8-1
	1.	Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		8-1
	2.	Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		8-1
	3.	Operating procedure . . . . . . . . . . . . . . . . . . . . .		8-1
	4.	List of simulations . . . . . . . . . . . . . . . . . . . . . . .		8-2
	5.	Details of simulations . . . . . . . . . . . . . . . . . . . .		8-3
	6.	User simulation . . . . . . . . . . . . . . . . . . . . . . .		8-16
		(1)	Functions which can be set and
			canceled by the user simulation . . . . . . .	8-16
		(2)	User simulation . . . . . . . . . . . . . . . . . . .	8-16
		(3)	User simulation code table . . . . . . . . . . .	8-17

(4)Department counter setting content

(Set with user program P10 P15) . . . . 8-17

[9] SELF DIAGNOSTICS . . . . . . . . . . . . . . . . . . . 9-1

1. Summary/purpose . . . . . . . . . . . . . . . . . . . . . . . 9-1 2. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1 3. Clearing the self diag display . . . . . . . . . . . . . . 9-1

[10]SERVICING AT MEMORY TROUBLE AND MAIN CONTROL PWB

REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . 10-1

1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1 2. Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1 3. Remedies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1 4. Set value recording sheet . . . . . . . . . . . . . . . . 10-3 5. Memory simulation list . . . . . . . . . . . . . . . . . . . 10-4

[11] MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . 11-1

1.	Maintenance cycle and maintenance items . . 11-1
[12] ELECTRICAL SECTION . . . . . . . . .			. . . . . 12-1
1.	System block diagram . . . . . . . . . . . . . .		. . . . . 12-1
2.	Main circuit . . . . . . . . . . . . . . . . . . . . . .		. . . . . 12-3
	(1)	Block diagram . . . . . . . . . . . . . . . .	. . . . . 12-3
	(2)	CPU (IC6) SC3041K12F . . . . . . . .	. . . . . 12-4
	(3)	Detector circuit of sensor signal . .	. . . . . 12-8
	(4)	Start/stop control circuit . . . . . . . .	. . . . . 12-8
	(5)	Heater lamp control circuit . . . . . .	. . . . . 12-9
	(6)	Driver circuit (Solenoid, electromagnetic
		clutch) . . . . . . . . . . . . . . . . . . . . . .	. . . . 12-10
	(7)	Stepping motor drive circuit . . . . .	. . . . 12-10
	(8)	AE (Auto Exposure) sensor circuit	. . . . 12-11
	(9)	Toner supply motor drive circuit . .	. . . . 12-11
	(10)	Reset IC (IC13) . . . . . . . . . . . . . . .	. . . . 12-11
	(11)	Operation panel . . . . . . . . . . . . . . .	. . . 12-12
	(12)	EnergyStar circuit description . . . . .	. . . 12-13

[1] PRODUCT OUTLINE

1. Product features

(1)Compact body

•Compact body size

The body width of 600mm is the smallest in the class.

•The employment of the front loading tray and the folding-type multi manual paper feed cassette realizes the small occupying area.

(Option)

(2)Clean copy gentle to the environment

•Silent design,

•Low level of ozone, use of recyclable materials

•The energy-saving mode reduces the power consumption.

(3)High capacity of copying

• Warm-up time is less than 35 sec. The first copy of 5.3 sec.

(4)Fully expandable system. (Refer to "2. System configuration.")

2. System configuration (options)

Automatic document feeder SF-A18

Tray (reserve) SF-UB15

Exclusive-use desk

SF-DS17

10-bin sorter SF-S17 N	10-bin staple sorter SF-S54

Note: When installing the SF-S54, the exclusive-use desk (SF-DS17) is reguired.

1 – 1

[2] PRODUCT SPECIFICATIONS

1. Basic specifications

(1)Type: Table top

(2)Copy speed:

	Normal	Enlargement	Reduction
		(Magnification)	(Magnification)
A3	10 sheets/min	10 sheets/min	10 sheets/min
		(200%)	(50%)
B4	12 sheets/min	12 sheets/min	12 sheets/min
A4 (Portrait)	18 sheets/min	14 sheets/min	14 sheets/min
A4 (Landscape)	14 sheets/min	14 sheets/min	14 sheets/min
81⁄2 × 13"	12 sheets/min	12 sheets/min	12 sheets/min

(Note) The copy speeds for enlargement and reduction are minimum speed values.

(3)Warm up time: 35 sec or less

(4)First copy time: 5.3 sec (Tray)

(5)Jam recovery time: 8 sec (Conditions: After leaving the door

		open for 60 sec, the standard conditions)
(6)	Multi copy Max. 250 sheets
(7)	Original
		Max. original size		A3
		Reference original size		Left side/Center
		Original sensing		No
(8)	Copy magnification ratio

Fixed magnification: AB series: 200, 141, 122, 115, 100, 86, 81,

70, 50% (9 steps)

Zoom range: 50% 200% (151 steps by the increment of 1%)

(9)Exposure

Exposure mode: Auto/Manual/Photo No. of manual steps: 9 steps

(10)Void width

Void area: Lead edge/rear edge: 3mm or less

Image loss Normal: 4mm or less

(11)Paper exit/finishing

Paper exit tray capacity: 250 sheets

Finishing: option 10-bin sorter, 10-bin staple sorter

(12) Additional functions

			Function			Remark
Auto Paper Selection				×
Auto Magnification ratio				×
Selection
Shift				F
1-set 2-copy				F		Enlargement is impossible.
Edge erase				F
Built-in auditor				F		20 departments
password mode
Interruption				F
Monochrom				×
AICS				F
Pre-heat mode				F
Auto shut off				F
Auto power save				F
Auto tray switching				×
Cover insertion				×
OHP insertion paper				×
Overlay				×
(13) External dimensions
	W x D x H				600 × 595 × 365 mm
	Occupying area (W x D)					885 × 595 mm
	Weight					41.0Kg
(14) Power source
Voltage: 220 230V 50/60Hz
	240V 50Hz
Frequency: 50/60Hz common
(15) Power consumption
Max. power		1.5kw				(Note) Max. when the
consumption						option is installed
Energy efficiency		64Wh/h or less
Auto power shut		5W or less
off (for EPA)

2 – 1

2. Description of each section

(1)Paper feed section

		Copying size				A3 A6
		Paper feed system				1 tray + multi manual feed
		Paper feed capacity				250 sheets 1
Cassette				Paper size		Paper weight	Paper kind
				AB series: A3			Standard paper,
Tray				A5		56 80g/m2
							recycled paper
				Ledger Invoice
				AB series: A3			Standard paper,
Multi			Multi	A6R		56 80g/m2	specified paper,
				Ledger Invoice			special paper,
manual
							OHP film, Second
paper
				AB series: A3		52	original paper,
feed			Single
							postcards
				A6R		128g/m2
							(without folding)

(2)Optical section

Light source		Halogen lamp
Exposure system		Slit exposure by moving the light source
Zooming system		By changing the lens positions and the scan
		speed.
Lens		Fixed focus lens
(3)	Process
Charging system			(–) DC saw teeth electrode system
Transfer system			(–) tungsten system
Separation system			(AC) separation tungsten system
(4)	Developing section
Developing system			Dry, two-component magnetic brush
			development (developer replacement)
Developing bias voltage			DC–200V ±5V
(5)	Fusing section
Fusing system					Heat roller system
Upper heat roller surface temperature					190 degrees C
Heater lamp					Halogen lamp 1000W 1

3. Supply parts

	Name	Content		Life	Product name
1	Photoconductor kit	Photoconductor drum	x 1	60K	SF-226DR
		Cleaner blade	x 1
		Drum separation pawl	x 2
2	Black developer	Black developer (530g)	x 10	60K x 10	SF-226CD
3	Black toner	Black toner bottle (280g)	x 10	6K x 10	SF-126CT
4	Upper heat roller kit	Upper heat roller	x 1	120K	SF-216HU
		Upper separation pawl	x 4
		Fusing bearing	x 1
5	Lower heat roller kit	Lower heat roller	x 1	120K	SF-220LH
		Lower separation pawl	x 4
6	Staple cartridge	Staple cartridge (For SF-S54)	x 3	5K staples x 3	SF-LS12
7	Upper heat roller	Upper heat roller	x 1	120K	SF-216HU
8	Upper separation pawl	Upper separation pawl x 4	x 10	120K x 10	SF-216UP
9	Heat roller gear	Heat roller gear	x 10	120K x 10	SF-216HG
10	Lower heat roller	Lower heat roller	x 1	120K	SF-216HR
11	Lower separation pawl	Lower separation pawl x 4	x 10	120K x 10	SF-216LP
12	Screen grid	Screen grid	x 10	120K x 10	SF-216SU
13	Cleaner blade	Cleaner blade	x 10	6K x 10	SF-216CB
14	Charging plate	Charging plate	x 10	120K x 10	SF-216PU
15	Ozone filter	Ozone filter	x 10	300K x 10	SF-216FL
16	Copy lamp	Copy lamp	x 10	—	SF-216CL
17	MC case unit	MC case unit	x 10	—	SF-216MC

2 – 2

4. Optional specifications

(1) Automatic document feeder (ADF) <Model name: SF-A18>

Original set direction	Face up
Original set position	Center reference
Original transport system	Belt (half size) system
Original feed sequence	Bottom taking (Face up exit)
Original size	A3 A5
Original change speed	16 sheets/min
(S → S)
Original weight	50 128g/m2
Original set quantity	50 sheets, 50 ~ 80 g/cm2,
	80 ~ 128 g/m2 thickness max. 5 mm
Original stop system	Position control system
Dimensions	571 (W) x 521 (D) x 110 (H) (mm)
	(Height: excluding the tray)
Weight	About 11.5kg
Power source	Supplied from the copier's power section.
Power consumption	65W

Functions

Original sensing on	YES (Scanning read for uncertain size
the tray	originals.)
Sensing size	AB series: A3, B4, A4, A4R, A5
Original mixture	Allowed (However, no linkage with the AMS)
Original reverse	NO

(2) 10-bin sorter

<Model name: SF-S17 N>

Type			Copier installation type/Hanging type
Distribution system			Bin shift by lead screw
No. of bins			10 bins (The top bin is used also for
			non-sort.)
Capacity			30 sheets/bin A4, 100 sheets for the
			top bin only.
Sorting			30 sheets (A4)
			15 sheets (B4)
			15 sheets (A3)
Grouping			20 sheets (A4)
			15 sheets (B4)
			15 sheets (A3)
Paper size		(Non-sort)		A3 A6 (Postcard)R
		(Sort/group)		A3 A5
Paper transport			Center reference
Paper reception			Face up
Paper weight		(Non-sort)		52 128g/m2
		(Sort/group)		56 80g/m2
Dimensions			335 (W) x 493 (D) x 298 (H) (mm)
			(Width: Including the tray.)
Weight			8.6kg [9.8kg Including mounted fittings]
Power source			Supplied from the copier. DC24V (1.2A)
Power consumption			Max. 30W

2 – 3

(3) 10-bin staple sorter (10-bin SS) <Model name: SF-S54>

Type				Copier installation type/hanging type
Distribution system				Bin shift system by lead screw
No. of bins				10 bins (The top bin is commonly used
				for non-sort.
Capacity				30 sheets for each bin
				(A4, 80g/m2)
				100 sheets for the top bin
Sort				30 sheets (A4)
				15 sheets (B4)
				15 sheets (A3, 80g/m2)
Grouping				20 sheets (A4)
				15 sheets (B4)
				15 sheets (A3, 80g/m2)
Staple sort				30 sheets (A4)
				15 SHEETS (B4)
				15 sheets (A3, 80g/m2)
Paper size		Non-sort		A3 A6R
		Sort/group		A3 A5
		Staple sort		A3, B4, A4, A4R, B5
Alignment (Sorting)				Max. shift 2mm (Alignment operation)
Paper transport				Center reference
Paper loading				Face up
Paper weight			Non-sort		49 128g/m2
			Sort/group/staple sort		56 80g/m2
Dimensions				390(W) 542(D) 400(H)mm
Weight				About 11.5kg, 15kg [including the
				installation kit]
Power source				DC24V (1.5A) supplied from the copier.
Power consumption				Max. 36W

Staple section

Type	Copier stapler
Stapling time	1.8 sec
No. of stapled sheets	30 sheets (80g/m2)
Binding reference	Front reference
Staple supply	Cartridge (5,000 pcs.)
Staple	SF-LS12
No staple/no cartridge/	Available
no stapler detection
Staple jam detection		Available
Manual staple mode		Available (excluding manual stapling)

Note: When installing the SF-S54, the exclusive-use desk (SF-DS17) is required.

(4) Exclusive-use desk

SF-DS17

Dimensions	570(W) 523(D) 520(H)mm
Weight	About 19.5kg
Functions	Caster	Provided
	Adjuster	None
	Door	None

2 – 4

[3] PRODUCT VIEWS

1. External view and internal structure

5 6

1

4

2

7

	8
3	9
	10

4

11 12

14 15

16

13

No.	Name	No.	Name	No.	Name
1	Original cover	2	Original table	3	Paper exit tray
4	Grip	5	Manual feed original guide	6	Manual feed tray
7	Operation panel	8	Front cover	9	Power switch
F	Paper tray	G	Developing unit grip	H	Toner hopper
I	Fusing unit	J	Developing unit lock lever	K	Release lever
L	Drum

3 – 1

2. Operation panel

1	2	3		4	5	6	7		8	9	10	11	12		13	14	15
SORTER		EXPOSURE			PAPER SIZE			81/2 x 51/2	11x 17	200%				1	2	POWER SAVE	AUDIT CLEAR
SORT	DUAL PAGE		AUTO		11 x 17					141%						3
	COPY							81/2 x 11 11x17		129%
			MANUAL		81/2 x 14			81/2 x 51/2	81/2 x11
					1			8/2 x 14	11x17	121%
			PHOTO		8 /2 x 11			1						4	5	6
STAPLE	MARGIN							100%
SORT					81/2 x 51/2			11x17	1	95%
	SHIFT				81/2 x 11 R				8 /2 x14
GROUP		1	2 3	4 5				81/2 x14	81/2 x11	77%	ZOOM INTERRUPT			7	8	9	CA
								11x17	81/2 x111	64%
					EXTRA			81/2 x11	8/2 x5 /2		%
	EDGE ERASE							11x17	81/2 x51/2	50%				0/	C
		LIGHT		DARK	TRAY SELECT
	16		17			18	19		20	21 22		23	24	25	26	27	28

No.	Name	No.	Name	No.	Name
1	SORTER key and indicators	2	DUAL PAGE COPY key and indicator	3	MARGIN SHIFT key and indicator
4	AUTO/MANUAL/PHOTO key and	5	PAPER SIZE indicators	6	Misfeed indicator
	indicators
7	Paper feed location/misfeed location	8	Preset ratio indicators	9	Copy quantity display
	indicators
F	Maintenance required indicator	G	Developer replacement required	H	Toner required indicator
			indicator
I	10-key pad	J	POWER SAVE indicator	K	AUDIT CLEAR key
L	EDGE ERASE key and indicator	M	LIGHT and DARK keys and indicators	N	TRAY SELECT key
O	Paper required indicator	P	Copy ratio selector keys	Q	ZOOM indicator
R	Copy ratio display key	S	Zoom keys	T	INTERRUPT key and indicator
U	Zero/readout key	V	Clear key	W	Print button and READY indicator
X	Clear all key

3 – 2

3. Clutches, solenoids, and motors

	6
	8
9
	7
11	1
	12
3	2
5	10
4

Clutches and solenoids

No.	Signal name	Name	Functions, operations
1	PSPS	Paper separation solenoid	Paper separation solenoid drive
2	RRC	Resist roller clutch	For resist roller rotation
3	TRC	Transport roller clutch	For transport roller rotation
4	CPFC1	Tray paper feed clutch	For paper feed roller rotation
5	MPFS	Manual paper feed solenoid	For pressing take-up roller

Motors

No.	Signal name	Name	Functions, operations	Type
6	VFM	Ventilation fan motor	Used to ventilate around the fusing section, cools	DC brushless
			down the machine, and remove ozone.
7	MM	Main motor	Used to drive the body.	DC brush
8	CFM	Optical system cooling fan	Used to cool and ventilate the optical system.	DC brushless
9	LM	Lens motor	Used to move the optical lens.	DC stepping
F	TM	Toner motor	Used to stir toner.	DC synchronous
G	MRM	Mirror motor	Used to move the mirror base.	DC stepping
H	SMF	Suction fan motor	Used to ventilate the suction section.	DC brushless

3 – 3

4. PWB

15

1

2

3

4

5

14

	16
6	7
11
	8
13
12
10	9

No	Name	Description	No	Name	Description
1	Operation PWB A	Operation input, display control	2	Operation PWB B	Operation input, display control
3	Blank lamp PWB	Used to control the blank lamp.	4	DL PWB	Used to drive the discharge lamp.
5	Optical PWB	AE sensor and lens motor interface	6	Process control PWB	Used to sense the toner density.
7	Main PWB	Used to control the body.	8	AC circuit PWB	AC power input
9	CSD PWB	Used to sense the body cassette	F	DC circuit PWB	DC power input
		size.
G	PID PWB	Manual paper entry detection	H	PPD PWB	Body PR roller JAM detection
I	High voltage PWB	Process high voltage, developing	J	POD PWB	Body paper exit section JAM
		bias voltage supply			detection, ventilation fan motor
					interface
K	Mark sensor PWB	Drum marking point detection	L	Sub DC power PWB	Supplies power in the energy
					saving mode. (Supplies 5V to the
					main PWB and the operation
					PWB.)

3 – 4

5. Sensors and switches

2 3 5 4 6

7

1

10

14	8
11	9
13	12

No.	Signal name	Name	Type	Operation, function
1	TCS	Toner density control sensor	Transmission sensor	HIGH when toner density falls.
2	ILSW	Front cabinet open/close switch	Interlock switch	ON when closed.
3	MSW	Power switch	Seesaw switch
4	TH	Fusing heater thermistor	Thermistor	Greater resistance at low
				temperature
5	TS	Fusing heater thermostat	Thermostat	Contact open at abnormally high
				temperature
6	POD	Paper exit paper sensor	Transmission photo sensor	LOW when paper is present.
7	MHPS	Mirror home position sensor	Transmission photo sensor	HIGH when paper is sensed.
8	MMRE	Main motor encoder	Transmission photo sensor	Rotation pulse output
9	TFD	Waste toner full switch	Lead switch	HIGH when sensed.
F	LHPS	Lens home position sensor	Transmission photo sensor	LOW when reduction.
G	PPD	Paper transport sensor	Transmission photo sensor	LOW when paper is present.
H	PED1	Body upper tray paper presence detection	Transmission photo sensor	HIGH when paper is present.
I	DPPD1	Body upper tray paper transport sensor	Transmission photo sensor	LOW when paper is present.
J	PID	Single manual feed paper entry sensor	Transmission photo sensor	HIGH when paper is present.

3 – 5

6. Rollers, mirrors, etc.

30	29	28	20	19	18	3	4	17	7	34	16	6	5	8	14
															15
2															12
															13
1															11
															9

32 33

38

35

31

27

26

25

24

23 22

21

37

36

No.	Name	No.	Name	No.	Name
1	No. 3 mirror	2	No. 2 mirror	3	No. 1 mirror
4	Copy lamp	5	No. 4 mirror	6	No. 5 mirror
7	No. 6 mirror	8	Developing unit toner box	9	Manual tray
F	—	G	Take-up roller	H	Paper feed roller
I	Reverse roller	J	PS front roller follower roll	K	PS front roller
L	Developing unit	M	Blank lamp	N	Main charger unit
O	Photoconductor drum	P	Cleaner unit	Q	Resist roller follower roll
R	Resist roller	S	Transfer charger	T	Separation charger
U	Drum separation pawl	V	Suction unit	W	Suction belt
X	Fusing thermistor	Y	Heater lamp	Z	Upper heat roller
[	Lower heat roller	\	Transport roller (upper) follower roller	]	Transport roller (upper)
^	Developing magnet roller	_	Tray paper feed roller	`	Tray paper feed reverse roller
a	Tray paper feed take-up roller	b	PE actuator

3 – 6

[4] UNPACKING AND INSTALLATION

1. Unpacking

Packing material/accessory list

	Name	Q'ty
1	Paper exit tray	1
2	Instruction manual	1
3	Maintenance card	1
4	Dust cover	1
5	Service contract	1
6	Installation manual	1
7	Magnification ratio select label	1

2. Installation

Installing conditions

The surrounding conditions of the machine affect the machine performance greatly. Use great care for the following items.

(1) Environment

1Avoid direct sunlight, and avoid installation near the window. (Curtains or blinds must be shut completely.)

If not, the plastic parts and the original cover may be deformed. Even if the window is of frosted glass, there is no difference.

2Avoid high temperature and high humidity, and avoid sudden temperature change. (Avoid installation near a cooler or a heater.)

If not, paper absorbs moisture and dew forms in the machine, causing paper jam or degraded image quality.

(Standard condition): The best condition to use the machine. 20 25°C: 65 ±5%RH

(Temperature and humidity): 15 30°C 20% 85% RH 35°C for 65%

% HR

85
65
Humidity
20
15	30	35	˚C

3Avoid dust and vibrations.

If dust enters the machine, malfunctions may occur.

4Avoid installation on an unstable surface.

Keep the machine in level state to maintain the performance.

4 – 1

5 Avoid installation to a poorly ventilated place.

6Avoid installation to a place where there are flammable materials or ammonia gas, etc. If the machine is installed near a diazo copier, the picture quality may be degraded and malfunctions may occur.

7 Install near a power outlet.

(2) Space around the machine

Install the machine with its rear side about 10cm (6 inches) apart from the wall in order to allow space to ventilation by the cooling fan.

Also allow enough space around the machine for proper operation.

(3) Installation base

Set the machine in horizontal position in the following procedure.

Be sure to use a leveling instrument (UKOGM0054CSZZ) to install the machine on a flat, horizontal place.

(Note) If the machine is not in horizontal position, the toner density control function may not work normally, resulting in degraded picture quality.

(4) Power source

1 Use the power source of the rated capacity.

2Avoid complicated wiring. If not, the breaker or the fuse may be overloaded.

(5) Grounding wire connection

1 Connect the grounding wire to prevent against a danger.

2When connecting the grounding wire, connect only to the grounding object (the grounding terminal of the power outlet, etc.) and never connect to a gas pipe.

4 – 2

3. Optical system lock release

A. No. 2/3 mirror unit lock release

Remove the one fixing screw of the No. 2/3 mirror unit on the left side of the copier.

Mirror unit fixing screw

B. Lens and No. 4/5 mirror unit lock release

Remove two fixing screws of the No. 4/5 mirror unit on the right inside of the copier.

Open the front cabinet and remove one fixing screw of the lens on the lower side of the operation panel.

Mirror unit fixing screw

Paper feed tray

Lens fixing screw

4. Charger cleaning

A. Main charger unit electrode cleaning

1Press the hook section of the main charger unit to release lock, and pull out and remove the main charger unit from the copier.

Hook

main charger unit

2Remove one fixing screw of the main charger unit (on the back side).

Fixing screw

Electrode section

Main charger unit

3Press the electrode cleaner onto the tips of the electrode so that the tips are inserted into the cleaner a few times to clean.

(Note)

•Do not move the cleaner back and forth with the electrode tips inserted into it.

•When cleaning, clean thoroughly at one time. Avoid partial cleaning.

Electrode cleaner

Electrode section

4Return the electrode section to the original position and fix it with a screw.

4 – 3

5Insert the main charger unit along the guide groove in the copier fully to the bottom.

Main charger unit

5. Developing unit setting

A. Developing unit setting

1Open the front cabinet, remove the installation toner fixed to the developing unit level with tape, and pull the developing unit lever toward you.

2Hold the grip of the developing unit, and slowly pull out the developing unit until it stops.

Then hold the hand carry strap and press the developing lever, and remove the developing unit.

Hand carry strap

DV lever

Developing unit

Grip

3Remove three fixing screws of the toner hopper of the developing unit, and remove the toner hopper.

Fixing screw

Fixing screw

Toner hopper

Developing unit

4While supplying developer from the developer supply port of the developing unit, turn the MG gear clockwise with a screwdriver or a scale to supply fully in the developing unit.

Developer

Developer supply port

Developing unit

MG gear

Screwdriver (+) or scale

5Install the toner hopper to the developing unit and fix it with two screws.

Fixing screw

Toner hopper

Fixing screw

Developing unit

4 – 4

6Hold the hand carry strap of the developing unit and insert it into the copier fully to the bottom.

Hand carry strap

Developing unit	Grip

7 Close the developing unit lever and close the front cabinet.

Developing unit lever

Front cabinet

With the above procedure, setting of the developing unit is completed.

6. Toner density sensor level adjustment

Turn on the copier power switch.

A. Developing unit level adjustment

1 Execute simulation 25.

C	0	2
	5	2

2 After 3 minutes, simulation 25 is completed.

(Note) If the simulation is terminated halfway, automatic reading is not performed. Do not terminate it halfway.

3 Cancel simulation 25 with the CA key.

7. Accessory installation

A. Copier tray installation

Install the copy tray to the paper exit section on the left side of the copier.

Copy tray

8. Toner supply

1 Open the front cover.

2Pull down the developer unit lock lever and pull the developer unit out slowly unit it stops.

4 – 5

3 Hold the new toner bottle as shown and shake it four or five times.

4 Open the toner hopper cover.

5 Pour the toner evenly into the toner hopper.

6 Close the toner hopper cover.

7 Slide the developer unit into the copier.

8 Return the developer unit lock lever into place.

9 Close the front cover.

4 – 6

9. Center shift adjustment

There is basically no need to perform the center shift adjustment because it is made when shipping. If the center should be shifted, adjust in the following procedures.

Make a copy. If the center is shifted as shown in Fig. 1 or Fig. 2, loosen the four screws which are fixing the cassette grip cabinet.

Section b	Section b
Section a	Direction A
	Section a

Direction B

(Note) When fixing the cassette cabinet, the fixing screws and the cabinet clearance a and b are in symmetry.

[Reference figure]

Section b

Section a

(1) Fig. 1

Move the cassette grip cabinet in direction A, tighten two fixing screws (a) and tow fixing screws (b) in this sequence. Make a copy again and check the center.

[Fig.1]		Paper center line

Image center line (First image)

(2) Fig. 2

Move the cassette grip cabinet in direction B, tighten two fixing screws (a) and tow fixing screws (b) in this sequence. Make a copy again and check the center.

[Fig.2]		Paper center line

Image center line (First image)

10. Label attachment

A. Label attachment

Attach the magnification ratio select label packed together with the Operation manual to the position shown in the figure below.

• When attaching the label to the copier with the original cover.

Magnification ratio select lable

•When attaching the label to the optional automatic original feeder

(SF-A18)

Magnification ratio select lable

4 – 7

[5] DESCRIPTIONS OF EACH SECTION

Descriptions are made on the following sections:

1 Paper feed section

2 Developing section

3 Optical section

4 Process section

5 Separation/transport section

6 Fusing/paper exit section

7 High voltage section

3

4

6

2

1

5

1. Paper feed section

1) General descriptions

To realize the compact design, the front loading system and the foldable multi paper feed unit (Option for some areas) are employed.

50 Sheets

250 sheets

The paper feed tray is of the universal type and has capacity of 250 sheets. The front loading system allows the tray to be loaded from the lower side of the front cabinet.

Manual paper feed is made in the multi paper feed.

2) Basic operations

(Tray paper feed operation)

When the CPFC (Cassette paper feed clutch) turn on, the paper feed roller shaft, the paper feed roller, and the take-up roller rotate in the direction of A. At the same time, the limiter spring moves down the roller release arm. As a result, the take-up roller falls by its own weight onto the paper surface, starting paper feed.

Roller release arm

Take-up roller

Paper feed roller

Paper feed roller shaft

When the CPFC turns off, rotation stops and the take-up roller is pushed up to the original position by the roller release arm spring.

(Manual paper feed operation)

There is no special mechanism for manual paper feed other than the manual feed paper sensing actuator and the paper guide.

When the CPFC turns off, rotation stops and the take-up roller is pushed up to the original position.

5 – 1

2. Developing section

1) General descriptions

(1) Two-component developer

The developer is composed of toner and carrier.

Carrier serves as a medium for attaching toner onto the electrostatic image on the photoconductor drum.

By stirring toner and carrier, they are rubbed to be charged positive

(+) and negative (–) respectively.

Since developer will deteriorate to degrade copy quality, it should be replaced regularly.

(2) Two-component magnetic brush development

The rotatable non-magnetic sleeve is provided over the magnet roller and is rotated.

Carrier forms a magnetic brush on the sleeve surface by magnetic force to attach toner onto the electrostatic image on the photoconductor drum.

(3) Developing bias

When the photoconductor is charged and exposed to light (exposure), the surface potential (voltage) of the photoconductor will not be lost completely. (The residual potential remains.)

Toner is attracted to the photoconductor by this residual potential, dirtying the photoconductor. As a result, a dirty copy of white background is generated.

To prevent against this, a voltage of the same polarity and higher than the residual potential is applied to the MG roller, preventing toner from being attached to the photoconductor surface.

Residual potential < DV BIAS

MG roller

DV BIAS

-200V

Toner Carrier

Developing bias voltage

(4) DV harness

The toner density sensor, the developing bias, harness.

(For details, refer to [6] DISASSEMBLY AND ASSEMBLY.)

(Viewed from the rear of develoing unit)

DV harness connector

(Details of DV harness connector)

For bias

GND

GND

*For toner density sensor

VB

*Resistance value is identified by color

2) Basic composition

2

4

1

	3	5
No.	Name
1	Magnet roller	Forms a magnetic brush of carrier
		by magnetic force.
2	Developing doctor blade	Limits the height of the magnetic
		brush.
3	Developing MIX roller	Stirs carrier in the developing unit
		and distributes toner evenly.
4	Toner transport roller	Transport toner sent from the
		toner hopper unit to the stirring
		section.
5	Toner density sensor	Senses	toner	density	in
		developer.

5 – 2

3) Basic operations

(Cassette paper feed)

When the CPFC (cassette paper feed clutch) is turned on, the paper feed roller shaft, the paper feed roller, and the take-up roller rotates in the direction of A, and the roller release arm is moved downward by the limiter spring. As a result, the take-up roller falls by its weight to reach the paper surface, feeding the paper. When the CPFC is turned off, the take-up roller is pushed up to the position by the roller release arm spring.

	Proccess	Main motor
	unit
	Main drive unit
	Stirring roller
	DV drive unit	Fuser unit
	MG roller
	Cleaner	Transport
	unit	unit
	PS roller	Paper exit
	Multi manual	roller
	insertion paper
	feed unit
	(Option)
	Transport
	roller(upper)

Transport roller(lower)

			Paper feed
Paper feed
			rive unit
unit

Paper feed unit

3. Optical section

1) General description

•The optical section of this model is composed of the fixed focus lens and six mirrors. Since the fixed focus lens is used, No. 4/5 mirror base is shifted according to the shift of the lens to change the distance between the original and the drum (OID, Original

Image Distance) in reduction or enlargement copy.

The lens and No. 4/5 mirror unit are shifted by driving the stepping motor with the signals from the main control PWB, allowing zooming of 151 steps in 1% increment in the range of 0.50 to 2.00.

•Exposure is adjusted by changing the copy lamp voltage. The AE sensor is provided in the zoom base to sense the density of the original.

The copy lamp light is reflected by the original to the AE sensor, which senses the density of the original and adjust the copy lamp light quantity according to the density.

•The exposure system is the slit exposure system by moving light source.

16	4	11	1	2	3	17	15	7	13
10	5	6		9
							14	8	12

1	Copy lamp	2	Reflector	3	No. 1 mirror
4	No. 2 mirror	5	No. 3 mirror	6	Lens
7	No. 4 mirror	8	No. 5 mirror	9	No. 6 mirror
F	No. 2/3 mirror base unit	G	Copy lamp unit	H	No. 4/5 mirror base unit
I	Mirror motor	J	Lens/No. 4/5 mirror base drive motor	K	Lens home position sensor
L	Mirror home position sensor	M	Automatic exposure (AE) sensor/
			Optical system dirt sensor

5 – 3

(1) Original table	(2) Copy lamp
The original table is fixed. The original is set in the left center position.	200V series: 170V, 310W
	(3) Mirror
	This model uses six mirrors.
	No. 1 mirror is attached to the copy lamp unit, No. 2/3 mirrors are
	attached to No. 2/3 mirror base, No. 4/5 mirrors are attached to No.
	4/5 mirror base.
	The copy lamp unit and the No. 2/3 mirror base unit are scanned in
	copying. The No. 4/5 mirror base is shifted in zoom copying to
	change the distance between ten original and the drum.
	(4) Lens (fixed focus lens)
	• Construction (1 group 3 lenses)
	•	Brightness (F8.5)
	•	Focus: (195mm ±1%)

(5) Lens home position sensor (LHPS)

This sensor senses the lens home position. The output signal of this sensor is the basic signal to control the copy magnification ratio.

(6) Lens base

The lens is mounted to the lens base, which is shifted toward the paper feed direction in reduction copy or toward the paper exit direction in enlargement copy by the lens drive motor.

Mirror base scan speed is changed for zooming

Enlargment

Normal

Zooming by changing the lens and mirror position

Original

Reduction

Copy direction

5 – 4

Parts identification and functions

Mirror home position sensor

No. 2/3 mirror unit Reflector Copy lamp unit

Lens drive wire

Lens home position sensor
	Mirror motor
AE sensor	Lens No. 4/5 mirror unit
	drive motor N

Copy lamp

No. 4/5 mirror unit

Lens

Lens unit

Mirror base wire

Temperature fuse

(7) Lens drive shaft

This shaft controls the optical axis of the lens in zoom copy. The lens follows along the slide base shaft.

(8) Lens drive wire

This is to shift the lens unit and the No. 4/5 mirror base.

(9) No. 4/5 mirror unit

No. 4/5 mirrors are attached to this unit. It is shifted by the lens drive motor to change the distance between the original and the drum according to the zooming ratio.

(10) Mirror motor

This stepping motor shifts the copy lamp unit and the No. 2/3 mirror base. It is rotated at the rpm according to each zooming ratio.

(11) Mirror home position sensor (MHPS)

This sensor senses the home position of the copy lamp unit. It is of light transmission type.

(12) No. 2/3 mirror unit

No. 2/3 mirrors are attached to this unit. It is scanned by the mirror motor.

(13) Copy lamp unit

This is composed of No. 1 mirror, the temperature fuse, the copy lamp, the exposure adjustment plate, and the reflector, and scanned by the mirror motor.

(14) Temperature fuse

This is attached closely to the reflector to prevent against abnormal temperature rise in the optical system. If the temperature rises abnormally, it turns off the copy lamp power directly.

200V series (117°C)

(15) Reflector

Light from the copy lamp is reflected by the reflector to the original.

(16) Exposure adjustment plate

Four exposure adjustment plates are attached to the copy lamp unit to adjust exposure balance in back and forth direction of the frame.

(17) Mirror base drive wire

This wire transmits the mirror motor power to the copy lamp unit and the No. 2/3 mirror base to scan the mirror base.

(18) Lens drive motor

This stepping motor drives the lens and the No. 4/5 mirror base.

(19) AE sensor

This AE sensor senses the original density by the light emitted from the copy lamp and reflected by the original, controlling the developing bias. The photometric area is about 100m width at the center and in the mirror base scanning direction.

The element is photo diodes.

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2) Basic operations

(Positions of the original, the lens, and the image in each magnification ratio)

Normal: The distance between the original set on the table glass and the lens is equal to the distance between the lens and the drum, resulting in the equal size of the original and the image.

Enlargement: Compared to the normal copy, the lens is nearer to the original and the distance between the original and the lens is shorter.

The distance between the No. 4/5 mirror unit and the lens is greater, and the distance between the lens and the drum is also greater.

The distance between the original and the exposure surface of the drum is greater than that in the normal copy.

Reduction: Compared to the normal copy, the lens is nearer to the drum, and the distance between the original surface and the lens is longer.

The distance between the lens and the exposure surface of the drum is shorter.

The distance between the No. 4/5 mirror unit and the lens is greater.

The distance between the original and the exposure surface of the drum is greater than that in the normal copy.

Mirror base scan speed

	Lens and mirror positions
Copy paper	are changed to adjust the
	magnification ratio

feed derection

Mirror scan speed is cahnged to adjust the magnification ratio Mirror scan speed Drum rotation speed<Mirror scan speed

Enlargement

Original

Reduction

(Copy lamp control in each copy density)

				[MAX. 83V(166V)]
	80
	70
CLV	60
(Copy lamp
	50
application
voltage)	40
				[MIN. 45V(90V)]
	(V)
	EX1	2	3	4	EX5

Execute Sim 46-01 to determine the copy lamp application voltage

(CLV) in EX1 and EX5.

Then divide the difference between the voltages of EX1.0 and EX5.0 into nine.

The application voltage of the copy lamp in each exposure level is determined by varying the ON timer duty of the copy lamp ON control signal.

•Photo density copy mode

Make the same control procedures as the manual density copy mode.

The image density is controlled by lowering the grid bias voltage of the charging charger. To maintain the reproduction quality in half tone, the ON time duty of the copy lamp ON signal is made shorter than in the manual density copy mode. (The application voltage is lower.)

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(Optical system dirt correction)

This model perform dirt correction by changing the copy lamp intensity according to the dirt degree in the optical system (the copy lamp unit, No. 1 mirror, No.2 mirror, No.3 mirror) to prevent against remarkable degrading of copy quality.

The reference value is the AE sensor output value which is obtained when the reference plate is exposed with the copy lamp voltage of

67.0V (134.0V) at power ON.

This value is checked with sim 44-08, 09.

Reference plate (Glass holder)	Table glass

Copy lamp light quantity "UP"

Automatic exposure sensor

CPU Reference value >Measured value Correction data output

CLV
Sim46
100	200	300	400	79.8K	80K
CLV + (0.7)

(1) Setting the reference value for optical system correction.						(2) Dirt correction
Reference plate (Glass holder)				Table glass		Reference plate (Glass holder)				Table glass

Automatic exposure sensor

CPU reference value setting

1 Clean the optical system at every maintenance.

2Perform Simulation 46-1.

(The previous data are cleared.)

3After completion of Simulation 46-1, when performing the first mirror initialization, measure light quantity of the copy lamp. Obtain the average value from the four measurement values and use the average value as the reference value for correction.

1234

800ms

CL

Light quantity measurement

Obtain the average value of four AE sensor values, and store it.

Copy lamp light quantity "UP"

Automatic exposure sensor

CPU Reference value >Measured value Correction data output

1 Measure light quantity when performing mirror initialization.

2 Store the correction data into memory.

3 Reset the register inside the CPU.

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4. Copy process

This model basic process and structure

•The Scorotron method is used to evenly charge the photoconductor surface to the given potential in the charge process. The corona wire regularly used is now replaced with a new corona charge mechanism that employs the 0.1mm thick stainless steel saw teeth plate, in order to suppress ozone generated when the oxide molecule in air is ionized.

•Considering the service efficiency, the process separation mechanism is adopted.

•To prevent high voltage leakage by the loose corona charge unit, a one-touch stopper mechanism is adopted.

	Proccess	Main motor
	unit
	Main drive unit
	Stirring roller
	DV drive unit	Fuser unit
	MG roller
	Cleaner	Transport
	unit	unit
	PS roller	Paper exit
	Multi manual	roller
	insertion paper
	feed unit
	(Option)
	Transport
	roller(upper)
	Transport
	roller(lower)

			Paper feed
Paper feed
			rive unit
unit

Paper feed unit

1) Photoconductor

•This model uses OPC (organic photoconductor) as photoconductive material. (φ50 mm)

OPC layer	CTL (Electric charge moving layer)
	CGL (Electric charge generating layer)
	Aluminum layer

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