Canon i9900, i9950 服务手册

 

2 - 9 

No. Occurrence 

level* 

Function

Symptom 

Condition 

Cause 

Solution 

Possible call or complaint 

1 B 

Print 
results 

Depending on print 
density, black streaks 
with 4 mm pitch or 
faint white streaks 
with 1-2 mm pitch 
may appear in 
gray-scale printing.   

- Printing with gray-scale.   

Due to changes in the gray-scale 
process specifications, streaks 
appear if the ink amount ejected 
from the print head is small.     

1. Change the original images 

into gray mode with application 
(ZoomBrowser or Photoshop).

  Print not selecting gray scale 

printing. However color is 
tinged with red or blue a little. 

2. ROMVerUp (->1.03 or more)

- Streaks  appear. 
 

2 B 

Print 
results 

Green ink is not 
ejected. 

- After the printer has not 

been used for more than 
one week. 

- Under high temperature 

and low humidity 
circumstances. 

Green ink is clogged, as it has not 
been used for a long time. 

- Perform print head deep 

cleaning. 

- Leave the print head untouched 

with the print head capped 
overnight. 

- Color appears abnormal. 
  (The same phenomenon as 

non-ejection of ink, in 
general) 

 

3 B 

Print 
results 

The back side of 
paper is smeared in 
borderless printing. 

- When print patterns with 

high duty are often printed.

Ink mist generated during printing 
or cleaning adheres on the rib of the 
platen. 

Clean the inside of the printer. 
(Wipe the platen ribs with wet 
cloth.) 

The back side of paper is 

smeared. 

* Occurrence level: 
 

A:  The symptom is likely to occur frequently. (Caution required) 

 

B: 

The symptom may occur under certain conditions, but likeliness is assumed very low in practical usage. 

 

C: 

The symptom is unlikely to be recognized by the user, and no practical issues are assumed.