Rear Sensor Adjustment - Epson Stylus Pro 7400 Service Manual

EPSON Stylus Pro 7400/7800/9400/9800

5.3.21 Rear Sensor Adjustment

Whenever the Rear Sensor is replaced, AD values (basis for paper detection) of a
newly attached sensor should be obtained to store them onto the Main Board.
Required Tool
Kimoto, Micro Trace #300
Procedure
1. Enter into the Serviceman Mode.
Turn the printer ON while holding down the [Paper Source
], and [Paper Feed ].
2. Select "SELF TESTING: Adjustment" to enter the Self Testing menu.
] → [Menu
[Paper Feed
3. Select "Adjustment: RearAD".
[Paper Feed ] five times
4. Release the Paper Set Lever.
5. Load the Micro Trace on the printer from the rear paper feeder setting it to the
position shown in Figure 5-63, and lower the Paper Set Lever.
In Figure 5-63, the H Top Cover is removed to show the position of
C A U T I O N
the Micro Trace clearly. When performing the adjustment, do not
remove the H Top Cover, or the AD value cannot be obtained
correctly.
6. Press the [Menu ] button. "[Enter] Start" will be displayed on the LCD
panel.
7. Press the [Enter ] button to start the AD value acquisition operation. After
about five seconds, the obtained AD value is displayed as "RearAD: *** ***
***".
"Retry AD Adjust" is displayed when the value cannot be obtained
C A U T I O N
due to Rear Sensor failure. In such case, replace the sensor and
make the adjustment again.
Adjustment
], [Menu
]
8. After confirming the "RearAD: *** *** ***" display, release the Paper Set
Lever and remove the Micro Trace.
9. Lower the Paper Set Lever and turn the printer OFF.
Micro Trace
Basic Adjustment
Figure 5-63. Setting the Micro Trace
Revision B
340