Sharp AL-2051 Service Manual Page 71
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- Table of contents
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AL-2051 ADJUSTMENTS 9 - 3
(1) Lead edge adjustment
1) Set a scale to the center of the paper lead edge guide as shown
below, and cover it with B4 or 8 1/2" x 14" paper.
2) Execute SIM 50-01
3) Set the print start position (AE mode lamp/COPY mode lamp
ON) (A), the lead edge void amount (TEXT mode lamp/PRINT
mode lamp ON) (B), and the scan start position (PHOTO mode
lamp/SCAN mode lamp ON) (C) to 0, and make a copy of a
scale at 100%.
4) Measure the image loss (Rmm) of the scale.
Set C = 10 x R (mm). (Example: Set to 40.)
When the value of C is increased by 10, the image loss is
decreased by 1mm. (Default: 50)
5) Measure the distance (Hmm) from the paper lead edge to the
image print start position.
Set A = 10 x H (mm). (Example: Set to 50.)
When the value of A is increased by 10, the image lead edge is
moved to the paper lead edge by 1mm. (Default: 50).
6) Set the lead edge void amount to B = 50 (2.5mm). (Default: 50)
When the value of B is increased by 10, the void is extended by
about 0.1mm. (For 25 or less, however, the void amount is
regarded as 0.)
* The RSPF adjustment is made by adjusting the RSPF image
scan start position after OC adjustment.
(2) Image rear edge void amount adjustment
1) Set a scale to the rear edge section of A4 or 11" x 8 1/2" paper
size as shown in the figure below, and cover it with B4 or 8 1/2"
x 14" paper.
2) Execute SIM 50-01 to select the image rear edge void amount
adjustment mode.
The set adjustment value is displayed on the copy quantity dis-
play.
3) Make a copy and measure the void amount of image rear edge.
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.
Note: The rear edge void cannot be checked with the first sheet
after entering the simulation mode, the first sheet after turn-
ing off/on the power, or the first sheet after inserting the
cassette. Use the second or later sheet to check the rear
edge void.
5mm
10mm
(Example)
Distance between paper lead
edge and image: H = 5mm
Image loss:
R = 3mm
B4 or 8 1/2″ × 14″ paper
A4 size rear edge
Paper rear edge
Void amount (Standard value: 2 - 3mm)
Scale image
- SERVICE MANUAL 1
- CAUTION 2
- CONTENTS 4
- [1] GENERAL 6
- [2] SPECIFICATIONS 7
- 3. Copy performance 8
- 4. Network board 9
- 5. Printer 9
- 6. Scan function 9
- [3] CONSUMABLE PARTS 10
- 2. Environmental 11
- 1. Appearance 12
- 2. Internal 12
- 3. Operation panel 13
- 4. Motors and solenoids 14
- 5. Sensors and switches 15
- 6. PWB unit 16
- 7. Cross sectional view 17
- 1. Copier installation 18
- 2. Cautions on handling 18
- 4. Unpacking 19
- 7. Loading paper 19
- 8. Power to copier 20
- 9. Software 20
- B. Installing the software 21
- (2) Connecting a USB cable 22
- D. Setting up button manager 26
- 10. Interface 27
- 11. Moving 27
- C. Attachment method 28
- 20mm - 25mm 29
- [6] COPY PROCESS 32
- 2. Outline of print process 33
- 3. Actual print process 33
- About DC 5.2kV 34
- Semiconductor laser 35
- [7] OPERATIONAL DESCRIPTIONS 36
- 2. Scanner section 37
- 3. Laser unit 38
- 4. Fuser section 38
- A. General description 39
- Gear 20T 42
- Process detection switch 42
- Gear 38T 42
- 7. RSPF section 43
- D. RSPF open/close detection 44
- (book document detection) 44
- A. Initial state 44
- B. Front copy 44
- C. Back copy 44
- 9. Shifter 45
- [8] DISASSEMBLY AND ASSEMBLY 46
- 2. Operation panel section 47
- 3. Optical section 48
- 4. Fusing section 50
- PPD2 sensor 51
- Heater lamp 51
- Heat roller 52
- C. Assembly procedure 53
- B. Disassembly procedure 53
- PS semi-circuler 57
- 7. Rear frame section 61
- 8. Power section 62
- 9. Duplex motor section 62
- 10. Reverse roller section 63
- 11. RSPF section 63
- C. Document tray unit 64
- F. Drive unit 64
- G. Shutter solenoid 65
- I. Paper empty sensor 66
- J. PS roller 67
- K. Upper transport roller 67
- L. Paper sensor 68
- M. Lower transport roller 68
- N. Paper exit sensor 68
- [9] ADJUSTMENTS 69
- B. Image position adjustment 70
- B4 or 8 1/2″ × 14″ paper 71
- A4 size rear edge 71
- Paper rear edge 71
- Scale image 71
- 2. Copy density adjustment 72
- 3. High voltage adjustment 73
- 4. Duplex adjustment 74
- Document guide 75
- The trailing edge has a scale 75
- Table glass 75
- 2. Key rule 77
- 3. List of simulations 77
- (Example) 101
- (Main cassette paper feed) 102
- Chart back surface 106
- 5. Trouble codes 108
- [11] USER PROGRAM 112
- [12] ELECTRICAL SECTION 115
- 2. Actual wiring diagram 116
- RSPF UNIT 117
- 3. Signal name list 118
- [13] CIRCUIT DIAGRAM 120
- 2/14Memory section 121
- 3/14Buffer section 122
- 4/14Driver section 1 123
- 5/14Driver section 2 124
- 6/14Connector section 1 125
- 7/14Connector section 2 126
- 8/14Connector section 3 127
- 9/14Pull Up/Down section 128
- 11/14KronosII SDRAM section 130
- 13/14KronosII USB/LSU section 132
- 14/14Power Source section 133
- 1/3LED/LCD section 134
- 2/3KEY / Buzzer section 135
- 3/3Connector section 136
- LEAD-FREE SOLDER 137
- CAUTION FOR BATTERY DISPOSAL 138
- Trademark acknowledgements 139
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