1.3.3 Copy quality check
CAUTION
Before checking copy image quality, check the toner density control data in the
service tool [4-02] screen. Perform setting C if the data is not correct. Also, check the
AID reference voltage in the [4-03] screen using the PC-1 chart. Perform setting A if
the value is not correct. (If the AID reference voltage is within the standard, you do
not have to perform setting A.)
1.
To check the copy image quality and paper transportation in the copier, make some copies
in the platen cover (no ADF and SADF) and AID (Auto Image Density) modes using a test
chart.
2. Follow the steps below to complete the image quality adjustment. (Refer to the following
page for the standards.)
1) Position a test chart on the exposure glass. Make copies to check the side-to-side registration.
Adjust it by changing the paper tray position, if necessary. Repeat this step for all paper trays.
2) Select the paper tray which has the largest paper size.
3) Access the service tool and select the [5-02] screen. Check and adjust all items in that screen.
4) Leave the service tool, and select the paper tray which has another paper size.
5) Again, check and adjust the erase margin and duplex side fences width on the [5-02] screen.
Repeat this step for each paper size which will be used by the customer.
6) To check and adjust the side-to-side registration of the back side of the copy, make copies
in the duplex mode.
7) Remove the test chart from the exposure glass and insert an original in the SADF. Make
copies to check and adjust the leading edge and side-to-side registration in the SADF mode.
8) Place some originals in the ADF. Make copies to check and adjust the side-to-side registration
in the ADF mode.
CAUTION
a) The side-to-side registration must be checked for all paper trays.
b) The erase margin and duplex side fence width must be checked for all paper sizes.
c) If the erase margin is not sufficient, thin black lines may sometimes appear on
copies (especially on the side edges of copies in the ADF mode). This is because the
side-to-side registration varies slightly on each copy if an operator does not set the
original side guides securely. You have to make more than 10 copies and check that
all of them are within specifications after the adjustment.
d) Check the side-to-side registration of the back side of the copy in the duplex mode
before installing the peripherals. If the value is outside specifications, you have to
remove the copier right cover.
3.
Put about 20 originals on the ADF and make one set of copies in the single original duplex
mode. Repeat this procedure for all paper trays.
4. Put about 100 originals on the ADF and make one set of copies in the 2-sided original du-
plex mode.
5. Insert an original in SADF and check that copying is normal.
6. If peripherals are installed, check that they works properly.
Machine Operation Check 1 July 1994
1-16
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