Canon CanoScan 9950F User manual

CanoScan 9950F
SERVICE MANUAL
REVISION 0
JY8-1323-000
COPYRIGHT2004 CANON INC. CANON CanoScan 9950F 082004

Application
This manual has been issued by Canon Inc. to provide information necessary to self-study
techniques, setting-up, maintenance and repair to technicians who service the target products. This
manual covers all locations where the target products are sold. For this reason, there may be
information in this manual that does not apply to your locality.
Revision
This manual might include technically incorrect descriptions or misprints because the target products
may be improved or changed. For this reason, service information is being published in case of any
changes in this manual. If this manual is having a significant change, in long or in short term, a
revised edition will be carried out.
The following paragraph does not apply to any countries where such provisions are inconsistent with
local law.
Trademarks
The product names and company names described in this manual are the registrered trademarks or
tradmards of the individual companies.
Copyright
The copyright of this manual belongs to Canon Inc. Under the copyright law, this manual may not
be copied,reproduced or translated into another language, in whole or in part, without the written
consent of Canon Inc., always excepting the cases where copying a part of this manual is needed
by business necessity.
Copyright 2004 by Canon Inc.
Canon Inc.
Ink Jet Scanner Quality Assurance Division
5-1, Hakusan 7-Chome, Toride-City, Ibaraki 302-8501, Japan

I. Outline
This manual is provided into 4 sections providing each necessary information to service the target
product.
Part 1: Maintenance
Maintenance and repair related information of the target product
Part 2: Technical references
Technical matters such as new techniques and FAQ of the target product
Part 3: Parts catalog
Parts catalog of the target product
Part 4: Appendix
Block diagrams and specifications of the target product

II. Content
Page Part 1: Maintenance
1 - 1 1. Maintenance
1 - 1 1-1 Service Engineer adjustment/Periodic Replacement/Periodic Inspection/Replacement of
Consumable
1 – 1 1-2 Customer Maintenance
1 – 1 1-3 Product Life
1 – 1 1-4 Special Tools
1 – 1 1-5 Serial Number Indicating Location
1 – 2 2. Service Troubleshooting by Symptom
1 – 2 2-1 Service Troubleshooting by Symptom
1 – 3 3. Servicing
1 – 3 3-1 Advisory for Replacement of Service Part
1 – 4 3-2 Instruction for Servicing
(1) Mounting Carriage Unt
(2) Mounting Button Circuit Board
(3) Grease Applying Position
1 – 6 4. Canon Scanner Test
1 –12 5. TransPort
Page Part 2: Technical Reference
2 – 1 1. New Features
2 – 2 2. Product FAQ
Page Part 3: Parts Catalog
3 – 1 Figure 1 Cable
3 – 3 Figure 2 MAIN BODY
Page Part 4: Appendix
4 – 1 1. Block Diagram
4 – 2 2. Specifications

Part 1
Maintenance

1. Maintenance
1-1 Service Engineer adjustment/Periodic Replacement/Periodic
Inspection/Replacement of Consumable
(1) Adjustment
item period purpose tool time
Apply grease Replacing MOTORUNIT
Apply grease to Motor
gear
MOLYKOTE
EM-50L
(HY9-0007)
Appro
x. 2
min
(2) Periodic Inspection
item period purpose tool Time
N/A
(3) Periodic Replacement
item period purpose tool Time
N/A
(4) Replacement of Consumable
item period purpose tool Time
N/A
1-2 Customer Maintenance
item period purpose tool Time
N/A
1-3 Product Life
(1) Main Body
Scan Count:30,000 scan
1-4 Special Tools
Name Tool Number Purpose remarks
MOLYKOTE
EM-50L HY9-0007-000 Apply to Motor gear sliding part Diverted from precedent
model
1-5 Serial Number Indicating Location
Back side of the main doby
1 - 1

2. Service Troubleshooting by Symptom
2-1 Service Troubleshooting by Symptom
symptom Action Remarks
Unit does not turn the power on
Spontaneously shuts down right
after turned on
Replace AC ADAPTER
or replace MAIN PCB ASS’Y
Carriage does not operate Replace MOTOR ASS’Y
or replace MAIN PCB ASS’Y
Acoustic noise Eliminate the foreign substance
or replace MOTOR UNIT
or replace MAIN PCB ASS’Y
or replace CARRIAGE ASS’Y
Malfunction
Scanning lamp does not light up ReplaceCARRIAGE ASS’Y
or replace MAIN PCB ASS’Y
Blurred image Clean PLATEN GLASS ASS’Y
or replace CARRIAGE ASS’Y
or replace MAIN PCB ASS’Y
Solid vertical line Clean PLATEN GLASS ASS’Y
or replace CARRIAGE ASS’Y
Solid horizontal line Check the connection with PC
or replace USB cable
or replace MAIN PCB ASS’Y
Faulty scanned image
Faulty color reproduction Replace MAIN PCB ASS’Y
1 - 2

3. Servicing
3-1 Advisory for Replacement of Service Part (also for disassembly and assembly)
Replacing Service Part Note for replacement*1 Adjustment
/Setting up Verifying operation
MAIN PCB ASS’Y
(FE2-0205-000) Disconnectthepower cord,leavetheunitabout1
minute(to discharge the
stored charge of the
capacitor) and
dismount the part (to
prevent MAINPCBASS’Y
broken)
Enforce
scan operation
CARRIAGE ASS’Y
(FE2-0206-000) Be careful not to touch mirrors or CCD PCBs. Enforce scan operation
PLATEN GLASS ASS’Y
(FE2-0201-000) Be careful not to put dirt or fingerprint on the
document glass.
Enforce
visual inspection
1:Note for entire work
Have a careful look on the wiring arrangement of flexible cable and harness, and
connection of connectors. [Refer to 3-2 Instruction for Servicing (1) Wiring arrangement
of flexible cable and harness, and connection of connectors]
Be careful not to drop down ferrite core to be broken.
Be careful not to let electrostatic break electric parts down.
Disconnect the power cord, leave the unit about 1 minute (to discharge the stored charge of the
capacitor) and dismount the part (to prevent MAINPCBASS’Y broken).
Do not stain inappropriate part with TIMING grease. Do not scratch or damage parts and
the unit.
Be careful not to damage or stain external cover.
1 - 3

3-2 Instruction for Servicing
1) Mounting Carriage unit
When Carriage unit is being mounted, be careful definitely not to touch CCD nor Lamp.
2) Mounting Button circuit board
Ferrite core is placed at the end of the Button circuit board. When Button circuit board is being
mounted, push Ferrite core toward backside of main body and then mount Button circuit board.
1 - 4

3) Grease applying position
Part Position Grease/Oil Dose
MOTOR ASS’Y 1 Motor gear sliding part MOLYCOTE EM-50L 1/2 rice-grain
amount
Note: 1 rice-grain amount : 9 - 18mg
1 - 5