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Phaser 7700 Color Laser Printer Service Manual
4-139
Step 5: RegiCon #3 Center Skew Adjustment
This test adjusts magnification balance. There are no manual adjustments
required after completing the test.
Note
To perform this test, move the Mark-On-Belt sensor to
the CENTER position. After the test has been run, the
Mark-On-Belt must be moved back to the home position.
1.
Remove the Waste Cartridge.
2.
Remove the screw that holds the Mark-On-Belt (MOB) sensor to the front
of the printer.
3.
Using the laser mirror cleaning tool backward, push the sensor all the way
to the CENTER position (until it hits the stop).
4.
Reinstall the Waste Cartridge.
5.
Close the door and run the test.
6.
From the Service Diagnostics menu, highlight Adjustments/Calibration
menu and press OK.
7.
Select Regi Con 685 Setup Cycle and press OK.
8.
At the prompt: Which DC685 procedure?, select RegiCon #3 Center
Skew Setup and press OK. The front panel now displays: <PostScript will
do 685-3>.
9.
The printer now reboots and runs the test. Wait for approximately 10
seconds after the motors turn off then cycle power and enter Service
Diagnostics. (To display the results or continue you must re-enter Service
Diagnostics Mode).
10.
Enter Adjustments/Calibration --> Regi Con 685 Results and press OK.
11.
Wait until the test results are displayed as follows:
Note
If the block counts are not the same number as
presented here, the printer has a print-quality problem.
Please refer to section “Streaks in Direction of Paper
Travel” on page 3-111
to
resolve the print-quality
problems before proceeding further with RegiCon.
12.
Using the back of the Laser Cleaning Tool, hook the loop of the MOB
Sensor (just pushed back in step 3 above) and pull it all the way to the
front. Continue holding the MOB Sensor in position while reinserting the
securing screw (removed in step 2 above) and tightening.
When DC685-3 Fails
This is probably due to the Mark-On-Belt sensor not being positioned properly
(assuming that RegiCon 1 and 2 tests have already passed). The sensor has
a "wedge-fit" when in position for the number 3 "center" position. If the
Mark-On-Belt sensor not correctly positiond, it can cause the test to fail.
Recheck the MOB sensor position and run the test again.
DC685-3 Passed
A Center Blocks: 24
B Center Blocks: 4
<Press Ok for more Data>
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