Overview; Required Adjustment - Epson Stylus PHOTO 820 Service Manual

EPSON Stylus PHOTO 810/820

5.1 Overview

This section describes the procedure for adjustments required when the printer is
disassembled and assembled for repair or service.

5.1.1 Required Adjustment

If you remove or replace the specific part in your service/repair, you have to perform
the appropriate adjustment as listed Table 5-1 below.
Performance Priority
Adjustment
item
Replaced part
Main board replacement
Printhead removal
Printhead replacement
CR motor replacement
CR unit removal/replacement
Printer mechanism replacement
Waste drain ink pad replacement
ASF unit removal/replacement
Holder shaft unit removal/replacement
NOTE: " ": Required necessary adjustment
" ": Required Adjustment for confirmation
The numbers in the circle/square shows the required adjustment order.
"NA": Not applicable.
• Following adjustments are not required on this product.
-Platen Gap adjustment
-Head Angular adjustment.
Adjustment
Table 5-1. Required Adjustment
1 2
EEPROM initial Ink pad replacement or
setting ink Counter reset
1 2
NA NA
NA NA
NA NA
NA NA
1
NA
NA 1
NA NA
NA NA
In this printer, it is necessary to perform appropriate adjustment in order to maintain
consistent printing function and quality, eliminate differences of each printer
mechanism's characteristics.Therefore, in case that the combination between the
printer mechanism and the main board changes or the Printhead is replaced during the
repair service, you must input the correct adjustment value into the EEPROM on the
Main board by using the Adjustment program.
In case that any parts are removed and assembled on the repair
product while running the Adjustment program, make sure to
turn off the printer.
3 4
Initial ink
Head ID input Bi-D adjustment USB ID input
charge
NA 3
NA NA
1 2
NA NA
NA NA
2 3
NA NA
NA NA
NA NA
NOTE: • When the Main board is replaced with new one, you may have to
replace the following parts also in case the EEPROM parameter
back up function is not available on the defective main board.
* Waste drain ink pad
* Both Black & Color Ink Cartridge
• After completing the adjustment, check the printing result with A4
check pattern by using the Adjustment program.
If the result is not good, perform appropriate adjustment.
Overview
5 6 7
Top margin
adjustment
4 5 6
1 NA 2
3 NA 4
1 NA NA
NA 2
1
5
4 NA
NA NA NA
NA NA 1
NA NA
1
Revision B
8
1st dot
adjustment
7
3
5
2
3
6
NA
2
2
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