Canon PIXMA MP170 User manual

PIXMA MP170
PIXMA MP450
SERVICE
MANUAL
Canon
Copyright 2005, Canon U.S.A. This technical publication is the proprietary and confidential information of Canon U.S.A. which
shall be retained for reference purposes byAuthorized Service Facilities of Canon U.S.A. Its unauthorized use is prohibited.

PIXMA MP170
PIXMA MP450
SERVICE MANUAL
Revision 0
QY8-13AH-000
COPYRIGHT©2005 CANON INC. CANON PIXMA MP170/PIXMA MP450 082005 XX 0.00-0

Scope
This manual has been issued by Canon Inc., to provide the service technicians of this product with the information
necessary for qualified persons to learn technical theory, installation, maintenance, and repair of products. The manual
covers information applicable in all regions where the product is sold. For this reason, it may contain information that is
not applicable to your region.
Revision
This manual could include technical inaccuracies or typographical errors due to improvements or changes made to the
product. When changes are made to the contents of the manual, Canon will release technical information when
necessary. When substantial changes are made to the contents of the manual, Canon will issue a revised edition.
The following do not apply if they do not conform to the laws and regulations of the region where the manual or product
is used:
Trademarks
Product and brand names appearing in this manual are registered trademarks or trademarks of the respective holders.
Copyright
All rights reserved. No parts of this manual may be reproduced in any form or by any means or translated into another
language without the written permission of Canon Inc., except in the case of internal business use.
Copyright © 2005 by Canon Inc.
CANON INC.
Inkjet Device Quality Assurance Div. 2
451, Tsukagoshi 3-chome, Saiwai-ku, Kawasaki-shi, Kanagawa 212-8530, Japan

I. MANUAL OUTLINE
This manual consists of the following three parts to provide information necessary to service the PIXMA MP170 /
MP450:
Part 1: Maintenance
Information on maintenance and troubleshooting of the PIXMA MP170 / MP450
Part 2: Technical Reference
N
ew technology and technical information such as FAQ's (Frequently Asked Questions) of the PIXMA MP170 / MP450
Part 3: Appendix
Block diagrams and pin layouts of the PIXMA MP170 / MP450
Reference:
This manual does not provide sufficient information for disassembly and reassembly procedures. Refer to the graphics in
the separate Parts Catalog.

II. TABLE OF CONTENTS
Part 1: MAINTENANCE
1. MAINTENANCE
1-1. Adjustment, Periodic Maintenance, Periodic Replacement Parts, and Replacement Consumables by
Service Engineer
1-2. Customer Maintenance
1-3. Product Life
1-4. Special Tools
1-5. Serial Number Location
2. LIST OF ERROR DISPLAY / INDICATIONS
2-1. Operator Call Errors
2-2. Service Call Errors
2-3. Warnings
2-4. Troubleshooting by Symptom
3. REPAIR
3-1. Notes on Service Part Replacement (and Disassembling / Reassembling)
3-2. Special Notes on Repair Servicing
3-3. Adjustment / Settings
(1) Paper feed motor adjustment
(2) Main chassis and carriage rail adjustment
(3) Document pressure sheet adjustment
(4) Grease application
(5) Waste ink counter setting
(6) User mode
(7) Service mode
Service test print
EEPROM initialization
Waste ink counter reset
Destination settings
Button and LCD test
3-4. Verification Items
(1) Service test print
(2) EEPROM information print

Part 2: TECHNICAL REFERENCE
1. NEW TECHNOLOGIES
2. CLEANING MODE AND AMOUNT OF INK PURGED
3. PRINT MODE
3-1. Resolution in Printing via Computer (Print on One or Both Sides of Paper, BK Cartridge,
Monochrome Mode)
3-2. Resolution in Printing via Computer (Print on One or Both Sides of Paper, BK and CL Cartridges,
Monochrome Mode)
3-3. Resolution in Printing via Computer (Print on One or Both Sides of Paper, BK and CL Cartridges,
Color Mode)
3-4. Resolution in Printing via Computer (Print on One or Both Sides of Paper, CL Cartridge, Color or
Monochrome Mode)
3-5. Resolution in Borderless Printing (Print on One or Both Sides of Paper, BK and CL Cartridges or
CL Cartridge Only, Color or Monochrome Mode)
3-6. Resolution in Direct Printing
3-7. Resolution in Copying (Copy on One or Both Sides of Paper, Color or Monochrome Mode)
4. FAQ (Problems Specific to the MP170 / MP450 and Corrective Actions)
Part 3: APPENDIX
1. BLOCK DIAGRAM
2. CONNECTOR LOCATION AND PIN LAYOUT
2-1. Main Board
2-2. MP450 Operation Panel Board L
2-3. MP450 Operation Panel Board R
2-4. MP170 Operation Panel Board
2-5. Card Slot Board (Card Slot Unit)
2-6. Carriage Board (Print Head Connector)
3. SPECIFICATIONS

Part 1
MAINTENANCE
󲩷

1. MAINTENANCE
1-1. Adjustment, Periodic Maintenance, Periodic Replacement Parts, and
Replacement Consumables by Service Engineer
(1) Adjustment
*1: Red screws of paper feed motor
The red screws securing the paper feed motor may be loosened only at replacement of the paper feed motor unit.
Adjustment Timing Purpose Tool Approx.
time
EEPROM
initialization
(EEPROM
settings)
At logic board ass'y replacement To initialize settings other than
the following:
- USB serial number
- Destination setting
- Waste ink counter
None. 1 min.
Destination
settings
(EEPROM
settings)
At logic board ass'y replacement To set the destination. None. 1 min.
LCD language
settings At logic board ass'y replacement To set the language to be displayed on the LCD. None. 1 min.
Waste ink
counter
resetting
(EEPROM
settings)
- At bottom case unit
replacement
MP170: QM2-2800-000
MP450: QM2-2814-000
- At ink absorber replacement
MP170: QY5-0149, QC1-
6014
MP450: QY5-0151, QC1-
6014
To reset the waste ink counter. None. 1 min.
Document
pressure sheet
position
adjustment
- At document cover unit
replacement
- At scanning unit replacement
To adjust the pressure sheet to fit
in place to the four corners of the
platen glass when the cover is
closed
None. 1 min.
Print head
alignment - At print head replacement
- At logic board ass'y
replacement
- At carriage unit replacement
To ensure accurate dot placement. - Machine buttons
- Computer
(settings via the
MP driver)
2 min.
Paper feed
motor position
adjustment*1
At paper feed motor unit
replacement To adjust the belt tension. (Position the paper feed motor so
that the belt is stretched tight.)
None. 2 min.
Grease
application - At carriage unit replacement
- At bottom case unit
replacement
- At platen replacement
- At eject roller replacement
- At cap blade unit replacement
-
- To maintain sliding properties
of the carriage, cap blade unit,
and eject rollers.
- FLOIL KG-
107A (QY9-
0057)
- MOLYKOTE
PG641 (CK-
0562)
1 min.
1-1

(2) Periodic maintenance
No periodic maintenance is necessary.
(3) Periodic replacement parts
There are no parts in this machine that require periodic replacement by a service engineer.
(4) Replacement consumables
There are no consumables that require replacement by a service engineer.
1-2. Customer Maintenance
1-3. Product Life
(1) Machine
Specified print volume (I) or the years of use (II), whichever comes first.
(I) Print volume
(II) Years of use
5 years of use
Adjustment Timing Purpose Tool Approx.
time
Print head
alignment When print quality is not satisfying. To ensure accurate dot placement. - Machine buttons (automatic
alignment by
scanning the head
alignment sheet)
- Computer (manual
alignment via the
MP driver)
3 min.
Print head
cleaning When print quality is not satisfying. To improve nozzle conditions. - Machine button
- Computer (settings
via the MP driver)
1 min.
Print head deep
cleaning When print quality is not satisfying, and not improved by
print head cleaning.
To improve nozzle conditions. - Machine button
- Computer (settings
via the MP driver)
2 min.
Ink cartridge
replacement When an ink cartridge becomes empty. (No ink error) ----- ----- 2 min.
Paper feed roller
cleaning When paper does not feed
properly. To clean the paper feed rollers. Machine button 2 min.
Bottom plate
cleaning When the back side of the paper is smeared To clean the platen ribs. - Machine button
- Computer (settings
via the MP driver)
1 min.
MP170 / MP450
8,000 pages
Black 1,500 character pattern 4,000 pages
Color A4, 7.5% duty per color pattern 3,200 pages
A4, 30 % duty per color pattern 160 pages
4 x 6, 30 % duty per color pattern 400 pages
Postcard, 30 % duty per color pattern 240 pages
1-2

(2) Ink cartridge (ink tank with nozzles) (target value)
Standard High capacity
BK CL BK CL
PG-40 CL-41 PG-50 CL-
51
1,500 character pattern
plain paper, standard mode (BK) 490 pages -750 pages -
ISO JIS-SCID No. 5
plain paper, standard mode (BK) 760 pages -1,170 pages -
ISO JIS-SCID No. 5
plain paper, standard mode (CL) -190 pages -320
pages
Digital camera 24 images
PP-101 4x6 -100 pages -180
pages
1-4. Special Tools
1-5. Serial Number Location
On the chassis (visible when the scanning unit is open).
Name Tool No. Application Remarks
MOLYKOTE
PG-641 QY9-0035-000 To be applied to the chassis. In common with
other models.
FLOIL
KG-107A QY9-0057-000 To be applied to the sliding portion of
the carriage, and the platen link. In common with other models.
To the table of contents To the top
<Part 1: 1.MAINTENANCE>
1-3

2. LIST OF ERROR DISPLAY / INDICATIONS
Errors and warnings are displayed by the following ways:
1) Operator call errors are indicated by the Alarm LED lit. (In the service mode, the Alarm LED blinks to indicate
errors.)
Service call errors are indicated by the number of cycles the Alarm and Power LEDs blink.
2) Errors and warnings are displayed on the LCD on the operation panel.
3) Warnings are displayed on the MP driver Status Monitor.
2-1. Operator Call Errors (by Alarm LED Lit in Orange)
MP450 LCD MP170 LCD
Alarm LED
blinking in
orange (in
the service
mode only)
Error [Error code] Solution Remarks
There is no
paper. LOAD PAPER 2 times No paper. (ASF) [1000] Set the paper in the ASF, and press the OK
button.
The paper is
jammed. PAPER JAMMED 3 times Paper jam. [1300] Remove the jammed
p
aper, and press the OK
button.
Ink has run out.
Replace the ink
cartridge and
close the cover.
U041
CHECK INK
U041 -No ink. [1600] Replace the empty ink
cartridge(s), or press
the OK button.
Pressing the OK
button will exit the
error without ink
cartridge replacement,
however, ink may run
out during printing.
The following
ink cartridge
cannot be
recognized.
U051 / U059
CHECK INK
U051 / U059 5 times Ink cartridge not
installed. [1401]
Ink cartridge not
for this model
installed. [1485]
Confirm that the ink
cartridges are for this
model, install them
properly, then close the
scanning unit.
The following
ink cartridge
cannot be
recognized.
U052
CHECK INK
U052 15 times Ink cartridge not
installed. [1682] Re-install the applicable ink cartridge
(s) properly, and close
the scanning unit.
Or, with the ink
cartridges installed,
turn the machine off
and on again.
The following
ink cartridge
cannot be
recognized.
U053
CHECK INK
U053 4 times Improper
installation of an
ink cartridge.
[1687]
Re-install the
applicable ink cartridge
(s) properly, and close
the scanning unit.
The waste ink
absorber is
almost full.
WASTE INK
NEAR FULL -Warning: The waste ink absorber
becomes almost
full.
[1700 for the main
waste ink
absorber, 1710 for
the platen waste
ink absorber]
Pressing the OK button
will clear the error, and
enable printing.
At repair*1:
For main waste ink
absorber replacement,
replace
- the bottom case unit
(MP170: QM2-2800
MP450: QM2-2814),
or
- the ink absorber kit
(MP170: QY5-0149
The service call error,
indicating the waste
ink absorber is full, is
likely to occur soon.
1-4

*1: The main waste ink absorber is separate from the platen waste ink absorber. In servicing, replace the waste ink
absorber which becomes full.
[See Section 3-3. Adjustment / Settings, (7) Service mode, for details.]
MP450: QY5-0151)
For platen ink absorber
replacement,
replace
- the ink absorber
(QC1-6014)
, and
- the ink absorber kit
(MP170: QY5-0149
MP450: QY5-0151).
Incompatible
device detected. INCOMPATIBLE CAMERA -The connected digital camera or
digital video
camera does not
support Camera
Direct Printing.
[2001]
Remove the cable
b
etween the camera and
the machine, press the
Stop/Reset button, then
re-connect the cable.
The following
ink may have
run out.
U161
An ink cartridge
that was once
empty is
installed.
U162
CHECK INK
U161
U162
-Remaining ink
amount unknown.
[1685/1686]
A once-used ink
cartridge (except the
one which has been
used until just before
replacement) is
installed.
Replace the applicable
ink cartridge with a
new one, or press the
OK button.
Pressing the OK
button will exit the
error without ink
cartridge replacement,
however, the function
to detect the
remaining ink amount
is disabled.
Failed to scan
head alignment
sheet.
HEAD
ALIGNMENT
ERROR
-Failed in scanning
the print head
alignment sheet.
Press the OK button to
exit the error, and do
the print head
alignment again (from
printing of the print
head alignment sheet),
while confirming the
following:
- Set A4 or LTR size
plain paper.
- Confirm that the print
head alignment sheet
is printed properly
(no smear or non-
ejection of ink).
- Fill in all the
applicable boxes in
the printed sheet.
- Place the sheet on the
platen glass in the
correct position and
orientation.
Cover is open. COVER IS OPEN -Scanning unit
open. [1200] Close the scanning unit.
1-5

2-2. Service Call Errors (by Cyclic Blinking in Orange (Alarm LED) and Green
(Power LED), or Alarm LED Lit in Orange)
Cycles of blinking in
orange (Alarm LED) and
green (Power LED) Error [Error code] Solution
(Replacement of listed parts, which are
likely to be faulty)
2 times Carriage error [5100] - Carriage unit (QM2-2136)
- Timing slit strip film (QC1-6015)
- Logic board ass'y (MP170 QM2-3210,
MP450 QM2-3231)*1
- Carriage motor (QM2-3165)
3 times Paper feed error [6000] - Timing sensor ass'y (QM2-3167)
- Timing slit disk film (QC1-4962)
- Feed roller ass'y (QL2-0905)
- Platen (QC1-6013)
- Logic board ass'y (MP170 QM2-3210,
MP450 QM2-3231)*1
- Paper feed motor (QM2-3166)
4 times Purge unit error [5C00] - Carriage unit (QM2-2136)
- Timing slit strip film (QC1-6015)
- Logic board ass'y (MP170 QM2-3210,
MP450 QM2-3231)*1
- Carriage motor (QM2-3165)- Carriage
motor (QM2-3165)
5 times ASF (cam) sensor error [5700] - Drive ass'y (QM2-2130)
- PE sensor ass'y (QM2-3168)
- Pressure roller ass'y (QM2-3336)
6 times Internal temperature error [5400] - Logic board ass'y (MP170 QM2-3210,
MP450 QM2-3231)*1
7 times Waste ink absorber full [5B00]*2 Main waste ink absorber:
- Bottom case unit (MP170 QM2-2800,
MP450 QM2-2814)*3
- Ink absorber kit (MP170 QY5-0149,
MP450 QY5-0151)
Platen waste ink absorber:
- Ink absorber (QC1-6014)
- Ink absorber kit (MP170 QY5-0149,
MP450 QY5-0151)
8 times Cartridge temperature rise error [5200] - Print head
- Logic board ass'y (MP170 QM2-3210,
MP450 QM2-3231)*1
9 times EEPROM error [6800] - Logic board ass'y (MP170 QM2-3210,
MP450 QM2-3231)*1
13 times Paper feed position error [6B00] - Paper feed motor (QM2-3166)
- Paper feed belt (QC1-5194)
- Logic board ass'y (MP170 QM2-3210,
MP450 QM2-3231)*1
15 times USB Host VBUS overcurrent [9000] - Logic board ass'y (MP170 QM2-3210,
MP450 QM2-3231)*1
17 times Motor driver error [6D00] - Logic board ass'y (MP170 QM2-3210,
MP450 QM2-3231)*1
20 times Other hardware error [6500] - Logic board ass'y (MP170 QM2-3210,
MP450 QM2-3231)*1
22 times Scanner error [5010] - Scanner unit (MP170 QM2-2798, MP450
QM2-2812)
- Logic board ass'y (MP170 QM2-3210,
MP450 QM2-3231)*1
1-6

*1: Before replacement of the logic board ass'y, check the waste ink amount, and re-set the waste ink amount value
in the replaced logic board.
[See Section 3-3. Adjustment / Settings, (7) Service mode, for details.]
*2: The main waste ink absorber is separate from the platen waste ink absorber. In servicing, replace the waste ink
absorber which becomes full.
[See Section 3-3. Adjustment / Settings, (7) Service mode, for details.]
*3: Reset the waste ink counter when replacing the bottom case unit. The main and platen waste ink counters can be
reset separately.
[See Section 3-3. Adjustment / Settings, (7) Service mode, for details.]
2-3. Warnings
Machine (displayed on the LCD):
*1: If the warning is displayed, the carriage does not move to the ink cartridge replacement position when the
scanning unit is opened.
Continuous alternate
blinking ROM error - Logic board ass'y (MP170 QM2-3210,
MP450 QM2-3231)*1
Lights in orange RAM error - Logic board ass'y (MP170 QM2-3210,
MP450 QM2-3231)*1
Displayed warning Remarks
Low ink
Print head temperature rise If the print head temperature is high when the scanning unit is opened, the
warning is displayed.*1
When the print head temperature falls, the warning is released.
Protection of excess rise of the print head
temperature If the print head temperature exceeds the specified limit, a Wait is inserted during printing,
1-7

2-4. Troubleshooting by Symptom
Symptom Solution Remarks
Faulty operation
The power does not turn on.
The power turns off immediately
after power-on.
Replace the
- AC adapter, or
- logic board ass'y*1.
Strange noise. Remove foreign material, or attach a
removed part if any.
Printing stops mid-way. Replace the logic board ass'y*1.
Nothing is displayed on the LCD. - Confirm the connection of the
operation panel, scanner unit, and the
logic board ass'y.
- Replace the
- operation panel, or
- logic board ass'y.
A portion of the LCD is not
displayed. - Perform the button and LCD test in the service mode, and confirm that the
LCD is displayed without any
segments missing.
- Confirm the connection of the
operation panel, scanner unit, and the
logic board ass'y.
- Replace the
- operation panel, or
- logic board ass'y.
Paper feed
problems
Multiple sheets feed. Replace the
- drive unit, or
- pressing plate ass'y.
Paper does not feed. Remove foreign material, or replace the
- drive unit, or
- pressing plate ass'y.
Paper feeds at an angle. Remove foreign material, or adjust the
paper guide, or replace the
- drive unit, or
- pressing plate ass'y.
Unsatisfactory
No printing, or no color ejected. Replace the
- ink cartridge*2,
- logic board ass'y*1,
- drive unit, or
- cap blade unit.
Printing is faint, or white lines appear
on printouts even after print head
cleaning.
Line(s) not included in the print data
appears on printouts.
Remove and re-install the ink
cartridges, or replace the
- ink cartridge*2,
- cap blade unit,
- purge unit, or
- logic board ass'y*1.
Paper gets smeared. Feed several sheets of paper,
perform bottom plate cleaning, or
clean the paper path with cotton swab or
cloth.
A part of a line is missing on
printouts. Replace the ink cartridge(s)*2.
1-8

*1: Before replacement of the logic board ass'y, check the waste ink amount, and re-set the waste ink amount value
on the replaced logic board.
[See Section 3-3. Adjustment / Settings, (7) Service mode, for details.]
*2: Replace the print head only after the print head deep cleaning is performed 2 times, and when the problem
persists.
print quality Color hue is incorrect. Replace the
- ink cartridge*2, or
perform print head alignment.
Printing is incorrect. Replace the logic board ass'y*1.
No ejection of black ink. Replace the ink cartridge(s)*2.
Graphic or text is enlarged on
printouts. When enlarged in the carriage movement direction, clean grease or oil
off the timing slit strip film, or replace
the
- timing slit strip film,
- carriage unit, or
- logic board ass'y*1.
When enlarged in the paper feed
direction, clean grease or oil off the
timing slit disk film, or replace the
- timing slit disk film,
- timing sensor unit, or
- logic board ass'y*1.
Faulty scanning
No scanning. - Confirm the connection between the
scanner unit and the logic board ass'y.
- Replace the
- scanner unit, or
- logic board ass'y.
Streaks or smear on the scanned
image. - Clean the platen glass.
- Confirm the connection between the
scanner unit and the logic board ass'y.
- Replace the
- scanner unit,
- logic board ass'y, or
- document pressure sheet.
To the table of contents To the top
<Part 1: 2. LIST OF ERROR DISPLAY / INDICATION>
1-9

3. REPAIR
3-1. Notes on Service Part Replacement (and Disassembling / Reassembling)
Service part Notes on replacement*1 Adjustment / settings Operation check
Logic board ass'y
MP170: QM2-3210
MP450: QM2-3231
- Before removal of the logic
board ass'y, remove the
power cord, and allow for
approx. 1 minute (for
discharge of capacitor's
accumulated charges), to
p
revent damage to the logic
board ass'y.
- Before replacement, check
the waste ink amount, and
re-set the waste ink amount
data in the replaced logic
board ass'y.
[See 3-3. Adjustment /
Settings, (7) Service mode,
for details.]
After replacement:
1. Initialize the EEPROM.
2. Set the waste ink data.
3. Set the destination in the
EEPROM.
4. Set the LCD language.
[See 3-3. Adjustment /
Settings, (7) Service
mode, for details of 1 to
4.]
5. Perform the print head
alignment in the user
mode.
- EEPROM information
print
- Service test print
- Printing via parallel or
USB connection
- Direct printing from a
digital camera
- Direct printing from a
memory card
- Print Beam printing
Ink absorber
QC1-6014 Platen waste ink absorber After replacement:
1. Reset the platen waste ink
counter.
[See 3-3. Adjustment /
Settings, (7) Service
mode, for details.]
- Service test print
Bottom case unit
MP170: QM2-2800
MP450: QM2-2814
Main waste ink absorber After replacement:
1. Reset the main waste ink
counter.
[See 3-3. Adjustment /
Settings, (7) Service
mode.]
2. Adjust the head-to-paper
distance.
[See 3-3. Adjustment /
Settings, (7) Service
mode.]
- Service test print
- Printing on thick paper
Ink absorber
MP170: QY5-0149
MP450: QY5-0151
Carriage unit
QM2-2136 The red screws on both sides
of the main chassis securing
the carriage shaft are allowed
to be loosened only when
replacing the carriage or
removing the main chassis.
Before removing the screws,
mark the original screw
position, and re-fasten them
at the original position.
At replacement:
1. Apply grease to the
sliding portions.
[See 3-3. Adjustment /
Settings, (4) Grease
application.]
2. Adjust the distance
between the carriage
shaft and the platen.
[See 3-3. Adjustment /
Settings, (2) Main chassis
and carriage rail
adjustment.]
3. Perform the print head
alignment in the user
mode.
- Printing on thick paper
Paper feed motor unit
QM2-3166 - The red screws securing the
paper feed motor are
allowed to be loosened.
(DO NOT loosen any other
red screws.)
At replacement:
1. Adjust the paper feed
motor.
[See 3-3. Adjustment /
1-10

*1: General notes:
- Make sure that the flexible cables and wires in the harness are in the proper position and connected correctly.
[See 3-2. Special Notes on Repair Servicing, (1) Flexible cable and harness wiring, connection, for details.]
- Do not drop the ferrite core, which may cause damage.
- Protect electrical parts from damage due to static electricity.
- Before removing a unit, after removing the power cord, allow the machine to sit for approx. 1 minute (for
capacitor discharging to protect the logic board ass'y from damages).
- Do not touch the timing slit strip film and timing slit disk film. No grease or abrasion is allowed.
- Protect the units from becoming soiled with ink.
- Protect the housing from scratches.
- Exercise caution with the red screws, as follows:
i. The red screws of the paper feed motor may be loosened only at replacement of the paper feed motor
unit (DO NOT loosen them in other cases).
ii. Except for carriage replacement, DO NOT loosen the red screws (which secures the carriage shaft
positioning) on both sides of the main chassis.
After replacement of the carriage, print on thick paper to confirm that the distance between the
carriage shaft and the platen is proper, and there is no contact of the ink cartridges to the paper.
If the ink cartridges contact the paper, adjust the carriage shaft, while referring to [3-3. Adjustment /
Settings, (2) Main chassis and carriage rail adjustment.]
Settings, (1) Paper feed
motor adjustment.]
Document pressure
plate ass'y
QM2-2809
Document pressure
sheet
QC1-7588
Scanner base unit
MP170: QM2-2798
MP450: QM2-2812
At sheet or unit
replacement:
1. Adjust the document
pressure sheet.
[See 3-3. Adjustment /
Settings, (3) Document
pressure sheet
adjustment.]
Timing slit strip film
QC1-4962 - 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
Timing slit disk film
QC1-4833
To the table of contents To the top
<Part 1: 3. REPAIR, 3-1>
1-11

3-2. Special Notes on Repair Servicing
(1) Flexible cable and harness wiring, connection
Be careful of wiring of the flexible cables and harness. Improper wiring or connection may cause breakage of a
line, leading to ignition or emission of smoke.
(I) Logic board ass'y, PictBridge connector, and IrDA board wiring
1-12

(II) Card board wiring
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<Part 1: 3. REPAIR, 3-2>
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