Sharp AL-2051 Service Manual Page 73
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- Table of contents
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AL-2051 ADJUSTMENTS 9 - 5
E. Copy density adjustment procedure
Use SIM 46-1 to set the copy density for each copy mode.
For selection of modes, use the [ ] [ ] key.
(1) Test chart (UKOG-0162FCZZ) setting
1) Place the test chart so that its edge is aligned with the A4 (Let-
ter) reference line on the document table. Then place a A4
(14" x 8 1/2") white paper on the test chart and close the docu-
ment cover.
(2) Perform the adjustment in each mode.
1) Execute SIM 46-01 (300dpi). To adjust in 600dpi, execute SIM
46-02.
2) Select the mode to be adjusted with the [AUTO] key. Set the
exposure level to 3 (center) for all adjustment. (Except for the
auto mode.)
3) Make a copy.
Check the adjustment level (shown in the above table) of the
exposure test chart (Sharp Gray Scale).
(When too bright): Decrease the value displayed on the copy
quantity display.
(When too dark): Increase the value displayed on the copy quan-
tity display.
∗ The value can be set in the range of 1 - 99.
3. High voltage adjustment
A. 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 of the power PWB and set the
negative side to the frame ground (power frame).
3) Execute SIM 8-2. (The main charger output is supplied for 30
sec in the grid voltage HIGH output mode.)
4) Adjust the control volume (VRG1) so that the output voltage is
580 ± 12V.
Adjustment
mode
Display
item
LED
Sharp gray chart
adjustment level
Auto mode AE COPY mode lamp "3" is slightly copied.
Text mode TEXT PRINT mode lamp "3" is slightly copied.
Photo mode PHOTO SCAN mode lamp "3" is slightly copied.
Text T/S mode TSTXT PRINT mode lamp
SCAN mode lamp
"3" is slightly copied.
Auto T/S mode TSAE COPY mode lamp
SCAN mode lamp
"3" is slightly copied.
Test chart
White paper
TEXT
| | | | |
(2) [AUTO] key
(1) Exposure mode, level display
Sharp Gray Scale adjustment level
Non toner
save
mode
Toner
save
mode
1 10
W
23456789
Slightly copied.
Not copied.
1 10
W
23456789
Slightly copied.
Not copied.
VRG1
- 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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