Epson Stylus CX7300 Service Manual page 87

EPSON Stylus CX7300/CX7400/DX7400/NX200/TX200 series/SX200 series/Stylus CX8300/CX8400/DX8400/NX400/TX400 series/SX400 series Revision C
Print Quality State Detailed phenomenon
Micro banding appears horizontally
against the CR movement direction and
it appears with the same width.
CR movement
direction
[Note]
If the problem is not solved, replace the
PF Motor with a new one.
• White streak / color
unevenness
occurrence
The Star wheel mark against the CR
movement direction.
Printing is blurred.
TROUBLESHOOTING
Table 3-22. Check point for the defective printing quality
Defective
unit/part name
Printer driver & 1. Check if the suitable paper is used according to the printer
exclusive paper driver setting.
1. Check if the Nozzle Check Pattern is printed correctly.
Printhead
1. Check if there is not any foreign material on the surface
of the PF Roller Unit.
PF Roller Unit
2. Check if the PF Roller Unit is not damaged.
1. Check if the Star Wheel Holder does not come off.
2. Check if the surface of the Star Wheel Holder Assy is flat. 2. Replace the Star Wheel Holder Assy with a new
Star Wheel Holder
Assy
Printer driver & 1. Check if the suitable paper is used according to the printer
exclusive paper driver setting.
1. Check if the correct Head ID is stored into the EEPROM
Printhead
by using the Adjustment Program.
Error Indications and Fault Occurrence Causes
Check point
PF Roller Unit
Remedy
1. Use the suitable paper according to the printer
driver setting.
1. Perform the Head Cleaning and check the
Nozzle Check Pattern. (Refer to Chapter 5
"ADJUSTMENT" (p.141).)
If the problem is not solved, replace the
Printhead with a new one.
1. Clean the surface of the PF Roller Unit
carefully with the soft cloth.
2. Replace the PF Roller Unit with a new one.
1. Reassemble the Star Wheel Holder correctly.
one.
1. Use the suitable paper according to the printer
driver setting.
1. Input 16-digit code of the Head ID into the
EEPROM by using the Adjustment Program.
Confidential
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