Sharp DM-1500, Service Manual

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50 01 Lead edge image position adju Paper lead edge/rear edge void adjustment
(Outline)
This adjustment is used to adjust the copy image position and lead edge/rear edge void amount on the copy
paper by adjusting the image scan start position and the print start position (resist roller ON timing) at 100%.
(Operation/Procedure)
1. When this simulation is executed, the currently set value is displayed in two digits. (Center value: 50)
2. When the copy mode select key is pressed, each setting mode and the display are changed.
∗
The selected adjustment mode is indicated by the lamps as shown in the table below.
3. Enter the adjustment value with the 10-key and press the start key. The set value is stored and a copy is
made. (When the set value is increased by 1, the void amount is shifted by 0.1 mm.)
4. When the clear key is pressed, the set value is stored and the simulation mode is terminated.
(Adjustment method)
1. Set the print start position (A: AE ON), the lead edge void amount (B: TEXT ON), the scanning start position
(C: PHOTO ON) to zero and make a copy of a scale at 100%.
2. Measure the image loss R (mm) of the scale.
Set as C = 10
×
R (mm). (Example: Set to 30.)
∗
When C is increased by 10, the image loss is decreased
by 1 mm. (Default: 5)
3. Measure the distance H (mm) from the paper lead edge to
the image print start position.
Set as A = 10
×
R (mm). (Example: Set to 50.)
∗
When the value of A is increased by 10, the image lead
edge is shifted toward the paper lead edge by 1 mm.
(Default: 50)
4. Set the lead edge void amount as B = 50 (2.5 mm).
(Default: 50)
∗
When the value of B is increased by 10, the void is
increased by about 1 mm.
(For 25 or less, however, the void amount becomes zero.)
✩
The SPF adjustment is made by adjusting the SPF image scan start position immediately after turning on the
power.
Adjustment mode Lighting lamps
Print start position (Main cassette) AE, Main cassette lamps
Print start position (2nd cassette) AE, 2nd lamps
Print start position (Manual paper feed) AE, Manual feed lamps
Image lead edge void quantity TEXT lamp
Image scan start position PHOTO lamp
Image rear edge void quantity AE, TEXT, PHOTO lamps
SPF image scan start position AE, TEXT lamps
Distance from the paper
lead edge to the image
H = 5mm
Image loss
R = 3mm
(Example)
DM-1505
9 – 10
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