Optical section, Basic operations | Sharp SF-1120, SF-1020 specification

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

Transport roller(lower)

			Paper feed
Paper feed			Paper feed
Paper feed			rive unit
unit			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 zoom- ing 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

Image 32

Sharp SF-1120, SF-1020 service manual Optical section, Basic operations, General description

Contents

SF-1020 SF-1120 Contents Lower heat roller replacement Electrical Section Product Outline Product featuresSystem configuration options ADU Product SpecificationsBasic specifications SF-CM16 Description of each sectionSF-CM15 Supply parts Brazil/Asia except Hong KongMiddle East/Africa SF-LS12 Optional specifications Bin staple sorter 10-bin SS Model name SF-S54 Staple sectionTwo-step paper feed unit Model name SF-CM15 One-step paper feed unit SF-CM16 Product Views External view and internal structure Operation panel SF-1020 SF-1120 Clutches and solenoids Motors PWB Explained with the SF-1120 and the SF-CM15 TCS IlswMSW POD Rollers, mirrors, etc Unpacking and Installation InstallationInstalling conditions Unpacking Installation base Power sourceGrounding wire connection Space around the machine Charger cleaning Main charger unit electrode cleaningOptical system lock release No /3 mirror unit lock release Developing unit setting Developing unit setting Accessory installation Toner density sensor level adjustmentCopy tray installation Developing unit level adjustmentPage Label attachment Center shift adjustmentLabel attachment Optional two-step paper feed unit SF-CM15 installation Parts packed together ING and Installation Optional one-step paper feed unit SF-CM16Included parts Removing the rear cover to the main copier units lower tray Placing the main copier unit over the paper feed unit Removing the lower tray from the main copier unitAttaching the main copier unit and paper feed unit Plugging in the relay harness Set the mode Tray paper size selection Described with the SF-1020Centering the paper Remove the tray Attach the tray Set paper, and change the paper size display Descriptions of Each Section Paper feed sectionGeneral descriptions Basic operations Developing section Basic composition General description Optical sectionBasic operations Original table Copy lamp MirrorLens fixed focus lens Lens home position sensor Lhps Lens drive wire Temperature fuseExposure adjustment plate Mirror base drive wire EX1 EX5 Original size sensingCLV Optical system dirt correction CPU Photoconductor Copy processThis model basic process and structure Process diagram Details of image forming process Main ChargingExposure CTL CGL Development CGL CTL CTL TransferSeparation Cleaning Discharging Transition of photoconductor surface potential Photoconductor drum sensitivity correctionProcess control function Summary Process control Process control timingDrum marking Basic structure Basic composition and functions Fusing paper exit sectionGeneral High voltage section ADU unit SF-1120 onlyBasic composition Basic operation Details of operation Paper feed roller assy removal Disassembly and AssemblyPaper feed unit Paper feed roller, take-up roller PS front roller assySeparation roller Transport unit Transport belt Fusing section Fusing unit removalHeater lamp replacement Upper heat roller assy removal Lower separation pawl replacement Upper separation pawl replacementLower heat roller replacement Copy lamp replacement Mirror base wire replacement and adjustmentOptical system Thermistor/thermostat removal Mirror base wire removal No /3 mirror unit mirror base B removal Mirror base wire fixing No /3 mirror unit mirror base B assemblyMirror base wire stretching Page No /5 mirror removal Copy lamp unit installation Mirror base a positioningNo /5 mirror unit mirror base C replacement No /5 mirror unit assembly Lens wire replacement Lens wire removal Procedures Lens removal Lens unit replacementLens unit installation Main charger MC unit Cleaning/replacement and noteHigh voltage section ~0.5 Cleaning/replacement and precautions Process sectionTransfer/separation charger TC/SC unit Process unitPage Drum Replace every 50K copies Blank lamp unit Clean every 50K copiesDischarge lamp unit Clean every 50K copies Cleaner blade Replace every 50K copies DV side seals F/R replacement Replace every 120K copiesDrum separation pawl Replace every 50K copies Toner reception seal Replace every 50K copies DB blade replacement Replace every 120K copies Ring attachment Cooling fan motor replacement Operation panel/intermediate cabinetFrame major parts Developing unit color identification Cooling fan motor Power unitTray size detecting PWB AC power PWB Main PWB unit Multi paper feed unit SF-MF15 option Take-up roller/paper feed roller Paper feed roller ADUReverse roller Paper feed unit SF-CM15, SF-CM16, option Adjustments Developing doctor clearance adjustmentDeveloping magnet roller main pole position adjustment Adjustment procedure Adjustment items YES Adjustment of each section Lens reference position adjustmentNo /5 mirror reference position adjustment 51 50 Vertical copy magnification ratio adjustment 110 Resolution adjustment Focus adjustment No.4/5 mirror adjustment screw Horizontal copy magnification ratio adjustment Adjustment procedure Comparison table of lens values and simulation input values Vertical skew adjustment Horizontal skew adjustment Mirror base rail handle Loosen Center shift adjustment Exposure balance adjustment Copy lead edge adjustment End of scale image Original detecting arm unit adjustment Original detecting section A4R LTR Original detecting level adjustment3 4 5 6 Operating procedure Simulations operating procedureSimulation Purpose List of simulations Simulation 26-6 Destination setting Cassette size switch table Details of simulations Full power on Psps A4R B5R WLT LTR INV ADF counter display ← Initial value SEC Secl Seeg SUK SCA OFF PPD1 PPD2PPD3 PPD4 PD0 PD1PD2 PD3 Developer counter clear Display range 8 ∼ No trouble 31 ∼ 35 --- Trouble The sub code is displayed Copying without grid bias correction ME + PE AE + PE Paper transport direction magnification ratio adjustment ADU alignment plate home position adjustment SF-2120 only User simulation 30 sec. This function can be cleared LED User simulationUser simulation code table Self Diagnostics Summary/purposeOperation Clearing the self diag display SF-1120 only High LOW General Remedies Make a copy and adjust Set value recording sheet Memory simulation list Maintenance Maintenance cycle and maintenance items System block diagram Electrical Section RPL on PSW on RPL OFF System operation when the power is turned onJAM Block diagram Main circuit Pin arrangement FeaturesCPU IC6 SC3041K12F Internal block diagram DMADmac ROM RAM CPU SC3041K12F IC1 pin signal RES Reset MCSCLK OUT NMI VDD O IC8 CXD1095QOden O CXD1095Q IC8 pin signal CLR Reset Oden ResetPC1 CPFC1 OUT PC2 CPEC2 OUT Detector circuit of sensor signal Start/stop control circuitSEL C SEL B SEL a SEL a SEL B SEL C Heater lamp control circuit Driver circuit Solenoid, electromagnetic clutch Stepping motor drive circuitOperation Load Reset IC IC13 AE Auto Exposure sensor circuitToner supply motor drive circuit CW/CCW KI2 CPU Operation panelKI0 KI1 EnergyStar circuit description Hound AC Circuit ADU circuit block diagram ADU circuit description ADU CPU IC1 ROM RAM TXD DSRRES Stby Stepping motor PAM1, PAM2 drive circuit ADU motor DDM drive circuit GND