![background image](http://html.mh-extra.com/html/canon/canoscan-9900f/canoscan-9900f_service-manual_62752069.webp)
COPYRIGHT 2003 CANON INC. CANOSCAN 9900F REV.0 FEB. 2003 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 5
TROUBLESHOOTING
I.
INTRODUCTION ............................. 5-1
A.
Initial Check ............................ 5-1
B.
Others ...................................... 5-1
II.
TROUBLESHOOTING FLOWCHART
................................................. 5-2
A.
Power LED Failure .................. 5-2
B.
Communication Failure .......... 5-3
III. PROBLEM, CAUSE AND
CORRECTIVE ACTION ................... 5-4
A.
Power LED Not Lighting ......... 5-4
B.
Communication Failure .......... 5-4
C.
Scanning Unit Movement Failure
................................................. 5-5
D.
Poor Image Quality .................. 5-5
E.
Acoustic Noise ........................ 5-5
IV.
CANON SCANNER TEST ................ 5-6
A.
Outline .................................... 5-6
B.
Operating Environment .......... 5-6
C.
Functions ................................ 5-7
D.
Functions Descriptions .......... 5-8
E.
Error Message ....................... 5-16