Sharp AL-1000 Series Service Manual

Text of Sharp AL-1000 Series User Guide:

• Sharp AL-1000 Series, SERVICE MANUAL CODE:00ZAL1000/A1E DIGITAL COPIER AL-1000 MODEL AL-1010 CONTENTS SHARP CORPORATION This document has been published to be used for after sales service only. The contents are subject to change without notice. Parts marked with " " is important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safty and performance of the set. [ 1 ] GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 – 1 [ 2 ] SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

• Sharp AL-1000 Series, 3. UNPACKING Unpack the copier and carry it to the installation location by holding the handles on both sides of the copier. 4. REMOVING PROTECTIVE PACKING MATERIALS (1) Remove pieces of tape (a), (b), (c), (d), (e), (f), (g) and (h) and protective cover (i). Then open the original cover and remove protective materials (j) and (k). (2) Use a coin (or suitable object) to remove the screw. Store the screw in the paper tray because it will be used if the copier has to be moved. 5. INSTALLING THE TD CARTRIDGE (1) Open the side cover while pressing the side cover open button. (2) Remove the CAUTION tape f

• Sharp AL-1000 Series, D. Charger wire cleaning (1) Remove the charger cleaner from the manual paper feed unit. (2) Set the charger cleaner to the transfer unit, and move it reciprocally a few times in the arrow direction shown in the figure below. E. Charger wire replacement (1) Remove the TC cover and remove the screw. (2) Remove the spring and remove the charger wire. (3) Install a new charger wire by reversing the procedures (1) and (2). At that time, be careful of the following items. ● The rest of the charger wire must be within 1.5mm. ● The spring hook section (charger wire winding section)

• (2) ASIC 1. Outline Fig. 4 shows the block diagram of the ASIC. The ASIC is composed of the following three blocks; the image process section, the print control section, and the I/F section. The image process section processes the image data from the CCD PWB according to the operation mode, such as shading, AE process, resolution conversion. and zooming. The print cont

• Sharp AL-1000 Series, (4) Remove the PPD1 sensor PWB. (5) Remove the E-ring and remove the manual paper feed transport roller. (6) Remove the cassette detection switch. (7) Remove the multi cover. 3) 1) 2) Wire treatment 3) 3) 4) 1) 2) 1) 2) 3) 3) Wire treatment 1) Multi cover AL-1000/1010 8-13

• Sharp AL-1000 Series, At the production line, the output power of the scanner unit is adjusted to 0.57 MILLI-WATT PLUS 20 PCTS and is maintained constant by the operation of the Automatic Power Control (APC). Even if the APC circuit fails in operation for some reason, the maximum output power will only be 15 MILLI-WATT 0.1 MICRO-SEC. Giving and accessible emission level of 42 MICRO-WATT which is still-less than the limit of CLASS-1 laser product. The foregoing is applicable only to the 220V model , 230V model and 240V model. VAROITUS! LAITTEEN KÄYTTÄMINEN MUULLA KUIN TÄSSÄ KÄYTTÖOHJEESSA MAINITULLA TAVALLA SAATTAA ALTISTAA KÄYTTÄJÄN TURVALLISUUSLUOKAN 1 YLITTÄVÄLLE NÄKYM�

• Sharp AL-1000 Series, [1] GENERAL 1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 2. Target User Copy Volume . . . . . . . . . . . . . . . . . . . . . . . . 1-1 3. Main features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 (1) High-speed laser copying . . . . . . . . . . . . . . . . . . . . 1-1 (2) High-quality digital image. . . . . . . . . . . . . . . . . . . . . 1-1 (3) Substantial copying functions . . . . . . . . . . . . . . . . . 1-1 4. Environmental (1) Normal operating condition . . . . . . . . . . . . . . . . . . . 1-1 (2) Acceptable

• Sharp AL-1000 Series, PIN No. Signal name IN/OUT Connected to Description 49 MAD2 OUT DRAM Address bus of DRAM (page memory) 50 MAD3 OUT DRAM Address bus of DRAM (page memory) 51 MAD4 OUT DRAM Address bus of DRAM (page memory) 52 MAD5 OUT DRAM Address bus of DRAM (page memory) 53 MAD6 OUT DRAM Address bus of DRAM (page memory) 54 MAD7 OUT DRAM Address bus of DRAM (page memory) 55 MAD8 OUT DRAM Address bus of DRAM (page memory) 56 MAD9 OUT DRAM Address bus of DRAM (page memory) 57 3.3V Power 58 MAD10 OUT DRAM Address bus of DRAM (page memory) 59 MAD11 OUT DRAM Address bus of DRAM (page memory) 60 GND Power 61 /CAS0 OUT DRAM CAS signal of DRAM (page memory) 62 /CAS1 OUT DRAM CAS signal of DRAM (page memor

• Sharp AL-1000 Series, (2) Scanner section 1) How to scan documents The scanner has sensors that are arranged in a line. These sensors scan a certain area of a document at a time and deliver outputs se- quentially. When the line is finished, the next line is scanned, and this procedure is repeated. The figure below shows the case where the lat- ter two sections of an image which are scanned are shown with solid lines and the former two sections which are being transmitted are shown with dotted lines. The direction of this line is called “main scanning direction,” and the scanning direction “sub scanning direction.” In the figure above,

• Sharp AL-1000 Series, 2. Circuit descriptions A. Maiin PWB (MCU) (1) CPU signal table CPU pin table Model without SPF PIN No Signal code Input/output Operating 1 /CS1 Output Chip Select for SRAM 2 /CS0 Output Chip Select for EPROM 3 D-GND 4 D-GND 55V 6 A0 Output Address Bus (NC-pull up) 7 A1 Output Address Bus 8 A2 Output Address Bus 9 A3 Output Address Bus 10 Output D-GND 11 A4 Output Address Bus 12 A5 Output Address Bus 13 A6 Output Address Bus 14 A7 Output Address Bus 15 A8 Output Address Bus 16 A9 Output Address Bus 17 A10 Output Address Bus 18

• 2. List of simulation Main code Sub code Content 1 1 Scanner unit operation check 5 1 Operation panel display lamps operation check 2 Fusing lamp and cooling fan operation check 3 Copy lamp operation check 6 1 Paper feed solenoids (CPFS1, CPFS2, MPFS) operation check 2 Resist solenoid (RRS) operation check 7 1 Warm-up time display and aging with JAM 6 Intermittent aging 8

• Sharp AL-1000 Series, (4) Features of copy density adjustment For the copy density adjustment, the image data shift function provided in the image process LSI is used. List of the adjustment modes Auto Mode Brightness 1 step only Manual Mode Brightness 5 steps. Adjustment of only the center brightness is made. Photo Mode Brightness 5 steps. Adjustment of only the center brightness is made. Manual T/S mode Brightness 5 steps. Adjustment of only the center brightness is made. T/S Auto mode Brightness 1 step only (5) Copy density adjustment procedure Use SIM 46-01 to set the copy density for ea

• Sharp AL-1000 Series, The lower the heat roller surface temperature is, the greater the thermistor resistance is, and vise versa. Therefore, the lower the heat roller surface temperature is, the higher the thermistor terminal voltage is, and vise versa. The thermistor terminal voltage is inputted to the CPU analog port. The CPU controls ON/OFF of the heater lamp by this input volt- age level. [High temperature protect circuit in case of CPU hung up] For IC119 3pin (reference voltage), +5V is divided by the resis- tor. The thermistor terminal voltage is inputted to IC119 2pin. When, therefore,

• Sharp AL-1000 Series, [9] Adjustment 1. Optical section (1) Image distortion adjustment There are following two types of image distortion. ● Horizontal image distortion ● Vertical image distortion In this machine, the image distortion is adjusted by changing the parallelism of mirrors (copy lamp unit, No. 2/3 mirror unit). a. Horizontal image distortion adjustment I. Summary Parallelism of mirrors can be made by installing the copy lamp unit and No. 2/3 mirror unit to the reference position. However, it must be checked by making a copy, and must be adjusted if necessary. II. Cases when the adjustment is require

• Sharp AL-1000 Series, (2) Remove the screws (2pcs.), and remove the copy lamp unit from the mirror base drive wire. (3) Pull the copy lamp unit toward you to remove the harness. (4) Remove the screw (4 pc) and remove the cover. (5) Remove the screws (2 pcs.), the harness, and the optical unit. When installing the lens unit, refer to “9-7. Lens unit installation reference.” C. Assembly procedure Basically reverse the disassembly procedure. The mirror base drive wire and the lens drive wire stretching methods are described below. a. Mirror base

• Sharp AL-1000 Series, 4) If the measurement value is out of the specified range, change the set value and repeat the adjustment procedure. The default value is 50. 3. Center offset adjustment 1) Set the self-made test chart for the center position adjust- ment so that its center line is aligned with the center mark of the document guide. ● Test chart for the center position adjustment Draw a line at the center of A4 or 8 1/2″ × 11″ paper in the paper transport direction. 2) Execute SIM 50 – 10 to select the print center offset (cas- sette paper feed) adjustment mode. The set adjustment value is displayed on the copy quantity display.

• Sharp AL-1000 Series, 5. Sensors and switches No. Name Signal Type Function Output (1) Mirror home position sensor MHPS Transmission sensor Mirror (scanner unit) home position detection “H” at home position (2) POD sensor POD Transmissions sensor Paper exitdetection “H” at paper pass (3) PPD2 sensor PPD2 Transmission sensor Paper transport detection 2 “L” at paper pass (4) Cassette detection switch CED1 Microswitch Cassette installation detection “H” at cassette insertion (5) Manual feed detection switch MFD Transmission sensor M

• Sharp AL-1000 Series, 3. Internal (1) TC cartridge lock release button (2) TD cartridge (3) Drum cartridge (4) Drum cartridge handle (5) Paper feed roller (6) Fusing unit release lever (7) Charger cleaner (8) Transfer charger (8) (1) (2) (3) (4) (5) (6) (7) AL-1000/1010 4-3

• The amplified CCD signal output is sent to the clamp circuit. In the clamp circuit, the black level is clamped to 2V at the BCLK signal timing by the analog switch. The clamped voltage is maintained for one line by the coupling capacitor. The clamped analog signal is impedance-converted and inputted to the AD convertor. The analog signal inputted to the AD convertor is converted into 8b

• Sharp AL-1000 Series, [2] SPECIFICATIONS 1. Basic Specifications item type Desktop Copy system Dry, electrostatic Segment (class) Digital personal copier External dimensions (W × D × H) (mm) H293 × W518 × D445mm Weight Approx. 43.3lbs (19.6kg), TD and drum cartridges included 2. Operation specification Section, item Details Paper feed section Paper feed system 1 tray (250 sheet) single bypass 1tray (250 sheet) + multi bypass (50 sheet) AB system Tray paper feed section Paper size A4, B5, A5 (Landscape) Paper weight 56 – 80g/m 2 Paper feed capacity 250 sheets Kinds Standard paper, specified paper, recycled paper Remark User adjustment of paper guide available Multi bypass paper feed sectio

• 3. High voltage adjustment (1) Main charger (Grid bias) Note: ● Use a digital multi meter with internal resistance of 10MΩ or more measurement. ● After adjusting the grid LOW output, adjust the HIGH output. Do not reverse the sequence. Procedures 1. Set the digital multi meter range to DC700V. 2. Set the positive side of the test rod to the connector CN11-3 (GRID) of high voltage section

• Sharp AL-1000 Series, 4. Motors and solenoids No. Part name Control signal Function,operation (1) Main motor MM Drives the copier. (2) Mirror motor MRMT Drives the optical mirror base (scanner unit). (3) Toner motor TM Supplies toner. (4) Cooling fan motor VFM Cools the optical section. (5) Resist roller solenoid RRS Resist roller rotation control solenoid (6) Paper feed solenoid CPFS1 Cassette Paper feed solenoid (7) Multi paper feed solenoid MPFS Multi manual pages feed solenoid (1) (2) (3) (4) (5) (7) (6) AL-1000/1010 4-4

• Sharp AL-1000 Series, 8. Power section A. List No. Part name Ref. page 1 Power PWB 8-17 B. Disassembly procedure (1) Remove two screws and one connector, and remove the power PWB. C. Assembly procedure For assembly, reverse the disassembly procedure. 2) 3) 1) 2) AL-1000/1010 8-17

• Sharp AL-1000 Series, Main code Sub code Contents 24 7 Drum counter clear (Operation/Procedure) When the START key is pressed, the drum counter value is reset to 0. 13 Scanner counter clear (Operation/Procedure) When the START key is pressed, the scanner counter value is reset to 0. 25 1 Main motor operation check (Operation/Procedure) When the START key is pressed, the main motor is rotated for 30 sec. To save toner consumption, the different operations are executed depending on installation of the developing unit. . When the developing unit is installed, the de

• Start 1) Because the grid potential is at a low level, the drum poten- tial is at about –400V. (Carrier may not be attracted though the carrier is pulled towards the drum by the electrostatic force of –400V. 2) Developing bias ( –400V) is applied when the photoconduc- tor potential is switched from LOW to HIGH. 3) Once developing bias (–400V) is applied and the photo con- ductor potential

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