Sharp SF-2040 - Adjusting the Copy

Eg. If the copy is as shown in the figure, move the exposure con-
trol plate a in the B direction to achieve the exposure balance.
(11) Adjusting the Copy Lead Edge
Simulation 50-01 or 50-02 allows the copy adjustment.
(Full-size copy)
Image loss 0 ~ 3 mm (Registration)
Void area 1 ~ 3 mm
(When using Simulation 50-01)
In this simulation, the following keys have special functions:
REDUCE key: This key is used to set the magnification to 50%.
ENLARGE key: This key is used to set the magnification to
200%.
For each operation of the scrol display key, A →
B → C → A → are indicated in this order and the
LCD shows a preset value as follows:
A: Preset value of RRC-A
B: Preset value of RRC-B
C: Preset value of void
SIMULATION NO.50-*
1. LEAD EDGE IMAGE POSITION ADJUSTMENT
2. LEAD EDGE IMAGE POSITION ADJUSTMENT (CALCULATION FORMULA)
LEAD EDGE IMAGE POSITION ADJUSTMENT
RRCA: RRCB: VOID:
Adjusting Procedure
1 Set a scale on the original table.
2 C → =↵ → 0/◊ → =↵ → 5 → 0/◊ → PSW →
1 → PSW to perform Simulation 50. When the ready lamp
goes on, a preset value (ranging from 1 to 99) is indicated.
Content of RRC-A.
3 Set values of both A and B to 0 and take a copy of the scale at
magnification of 100% and 200% respectively.
• A full-size(100%) copy can be taken by typing
• 0/◊ → 0/◊ → ➡ → 0/◊ → 0/◊ → PSW .
• A enlarged(200%) copy can be taken by typing ENLARGE
→ (After the lens moves, ready lamp ON) → PSW .
4 Measure a distance from the paper end to the image (scale) end
of each copy, and calculate the values of RRC-A and RRC-B
with the following expressions:
If the preset value of RRC-A is not appropriate, the images at the
both magnifications differs in end position. RRC-B is a preset
value used to control the RRC ON-timing so that the end of the
drum image is aligned with the end of a copy paper.
Exposure
insufficient
Paper discharge
direction
Half-tone copy
Scale
Simulation No. 50-1
1. Lead edge image position adjustment
2. Lead edge image position adjustment (Calculation formula)
MFT RRC VOIDA: B:
CS RRC A: B: F: R:
L2
50
2010 30 40 60
70
10 20 30
L1
End of scale image
End of scale image
full-size(100%) copy Enlarged(200%) copy
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