Sharp SF-1020 - User Manual

SERVICE MANUAL
CODE: 00ZSF1120SM/E
MODEL SF-1020
MODEL SF-1120
Option • Paper tray (SF-UB15)
• Two-step paper feed unit (SF-CM15)
• One-step paper feed unit (SF-CM16)
• Personal counter (SF-71A/71B)
• 10-bin sorter (SF-S17N) @
• 10-bin staple sorter (SF-S54) @
• Auto document feeder (SF-A18) @
• Reverse automatic document feeder
(SF-A57) @
@ For the options, refer to their service manuals.
[ 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
CONTENTS
SHARP CORPORATION
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
SF-1020
SF-1120
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 SF-1020 Specifications

General

Printing Technology	Laser
Maximum Print Resolution	600 x 600 dpi
Copier Type	Digital
Scan Type	Flatbed
Scan Resolution	600 x 600 dpi
Paper Capacity	250 sheets
Functions	Copier, fax, printer, scanner

Summary

[4] UNPACKING AND INSTALLATION

5. Developing unit setting

Step-by-step guide for correctly installing and setting the developing unit within the copier.

6. Toner density sensor level adjustment

Explains how to adjust the toner density sensor level using simulation for accurate density control.

11. Optional two-step paper feed unit (SF-CM15) installation

Step-by-step guide for installing the optional two-step paper feed unit (SF-CM15) onto the copier.

12. Optional one-step paper feed unit (SF-CM16)

Instructions for installing the optional one-step paper feed unit (SF-CM16) onto the copier.

[5] DESCRIPTIONS OF EACH SECTION

(3) Details of image forming process

Details the image forming process step-by-step: Main Charging, Exposure, Development.

Process control

Details the process control for image density, including toner patch image formation and grid voltage.

[6] DISASSEMBLY AND ASSEMBLY

1. Paper feed section

Provides detailed instructions for disassembling and assembling the paper feed section, including the paper feed unit.

3. Fusing section

Covers the removal and replacement of components within the fusing section, such as the heater lamp and rollers.

4. Optical system

Details procedures for replacing key components in the optical system, including the copy lamp and mirrors.

5. High voltage section

Instructions for cleaning and replacing components in the high voltage section, including the main charger unit.

6. Process section

Procedures for disassembling and cleaning parts of the process section, such as the process unit and waste toner bottle.

[7] ADJUSTMENTS

1. Developing section

Details the adjustment procedures for the developing section, including doctor clearance and magnet roller position.

2. Optical system

Lists the various optical system adjustment items, including lens reference position and magnification ratios.

2-3. Adjustment of each section

Details specific adjustments for the optical system, including lens reference and No. 4/5 mirror position.

D. Resolution adjustment (Focus adjustment)

Step-by-step guide for adjusting the resolution and focus of the copier's optical system.

G. Vertical skew adjustment

Procedure for adjusting vertical skew in copies caused by mirror base drive wire or mirror replacement.

H. Horizontal skew adjustment

Procedure for adjusting horizontal skew in copies, relevant after mirror base wire or mirror replacement.

I. Center shift adjustment

Procedure for adjusting the center shift of the copy output if it deviates from the standard.

J. Exposure balance adjustment

Procedure for adjusting exposure balance to ensure uniform exposure across the copy.

K. Copy lead edge adjustment

Adjustments for copy lead edge and void area to ensure proper copy size and reduce dirt.

[9] SELF DIAGNOSTICS

1. Summary;purpose

[10] SERVICING AT MEMORY TROUBLE AND MAIN CONTROL PWB REPLACEMENT

1. General

3. Remedies

4. Set value recording sheet

[11] MAINTENANCE

1. Maintenance cycle and maintenance items

[12] ELECTRICAL SECTION

(2) CPU (IC6) SC3041 K12 F

(3) I;O (IC8) CXD1095 Q