Printed Copy Quality Problems - Panasonic DP-C405 Service Handbook

3.3.

Printed Copy Quality Problems

3.3.1. Printed Image
Print Test Pattern
Horizontal Line (Front to Rear),
Vertical Line (Feed direction), Cyclical
Stripes or Dots on the Printed Image
Vertical Stripe
Check: OPC Drum; Charge/Developer
Clean: IT Belt, STR Unit, Cleaning Unit,
LSU/Scanner, Glass/Mirror/Lens
Horizontal Stripe (Cyclical)
- Check the periodic pitch.
- Clean the appropriated parts.
- Replace the inoperative parts/unit.
Print Test Pattern
Check the Image
3.3.2.
Copy Image Quality Adjustment
3.3.2.1.
Monochrome Image Quality Adjustment
Mode Adjustment
Mono Density Adj.
Copy Highlight
Ver. 1.1
Not OK
OK
END
F-Code
Text F6-220
T/P F6-221
Photo F6-222
-32 - 31
0 (default)
Check/Clean/
Replace
Charge Roller
Magnet Roller
FTR Roller
STR Bias Roller
STR Roller
OPC Drum
Fuser Belt
IT Belt
Test Pattern F1 Mode
F1-24/25/26/27: Y/M/C/BK Halftone (2x2dots)
F1-36 : BK Solid Patch A3/LDR
F1-37 : BK by YMC Halftone Patch A3/LDR
Caution:
1. Gently clean the soiled area only as
described below:
a) Clean the Cleaning Unit with a Dry Soft
cloth; carefully removing paper powder,
pieces of paper.
b) Clean the IT Belt & the STR Unit with
a Dry Soft cloth; carefully removing the
Toner first, and then cleaning with a Soft
cloth saturated with Alcohol.
2. If the problem is not resolved, then replace
the inoperative Part/Unit.
Density Adjustment of Highlighted area
* Perform after completing the printer and scanner
adjustment
* Not used for reducing the density compensation
* Adjust according to customer's needs
Default: 0 : -32 => 31 + (Lighter to Darker)
Text mode: Useful for Newspapers, Tracing Paper, etc
T/P mode: Useful for Maps, 1-Color, 2-Color
Photo mode: Useful for Photos
291
DP-C405/C305/C265
Diameter Pitch
(mm)
(mm)
14 44.0
18 28.3
18 56.5
21 66.0
28 88.0
30 94.2
148
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986
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Function
FEB 2008