Canon i9900, i9950 Service Manual

 

1 - 11 

(Notes on Service Part Replacement and Disassembling / Reassembling - cont’d-) 

Service part 

Notes on replacement

*1

 

Adjustment / settings

*2

 Operation 

check 

Carriage Lift Part 
(QC1-2298, 2301, 2657, 
4361, 4527, 4621, and 
4632) 

 At 

replacement: 

1. Apply grease to 

QC1-4527 (lift input, 
gear)/2301 (bushing)   

See Section 3.4. 

Adjustment / Settings, 
(3) Grease application

. 

-  Service test print 
-  (CD-R test print) 

Timing slit strip film 
(QC1-4520) 

Timing slit disk film 
(QC1-2484) 

-  Upon contact with the 

film, wipe the film with 
ethanol. 

-  Confirm no grease is on 

the film. (Wipe off any 
grease thoroughly with 
ethanol.) 

-  Do not bend the film. 

After replacement: 
1. Perform the print head 

alignment in the user 
mode. 

-  Service test print 

Print head 
(QY6-0055) 

 After 

replacement: 

1. Perform the print head 

alignment in the user 
mode. 

-  Service test print 

*1: General 

notes: 

 

- After repair for trouble concerning printing or the print head re-installation, empty ink in the print 

head once, and return the printer to users.   

 

 

  (See Section 3.3. Special Notes on Repair Servicing (2) Notes on after repair for trouble concerning 

printing or re-installation of the print head.) 

 

 

-  Make sure that the flexible cables and wires in the harness are in the proper position and connected 

correctly. 

See Section 3.3. Special Notes on Repair Servicing, (1) Flexible cable and harness wiring, 

connection, for details. 

 

 

-  Do not drop the ferrite core, which may damage it. 

 

 

-  Protect electrical parts from damage due to static electricity. 

 

 

-  Before removing a unit, after removing the power cord, allow the printer to sit for approx. 1 minute 

(for capacitor discharge to protect the logic board ass’y from damage). 

 

 

-  Do not touch the timing slit strip film and timing slit disk film. No grease or abrasion is allowed. 

 

 

-  Avoid soiling the unit with ink. 

 

 

-  Protect the housing from scratches. 

  

- 

Exercise 

caution 

with 

the red screws, as follows: 

 

i.  The red screws of paper feed motor may be loosened only at replacement of the paper feed 

motor unit (DO NOT loosen them in other cases). 

 

ii.  DO NOT loosen the red screws on both sides of the main chassis, securing the carriage 

shaft positioning (they are not adjustable in servicing). 

- Exercise caution with replacement of the bottom case/output tray unit (only for the i9950 model) 

When replacing QM2-1328 (the bottom case/output tray unit), replace QC1-4558, 4559, 4560, 
XD2-1100-322, and 2300-602. 

(Once the E-ring is removed, it is not possible to use it again.) 

Exercise care when handling the flexible cable and harness wiring. Incorrect wiring may cause ignition or 
emission of smoke. 

Refer to the PIXUS9900i/i9900/i9950 Parts Catalog.

 

 

 

 

After repair for trouble concerning printing or the print head re-installation, empty ink in the print head 
once, and return the printer to users. This is aimed at preventing non-ejection of ink at initial printing. 
Operational procedures are as follows.