Service Manual
Page 19
...array S1 Home position sensor Q4 Figure 2-2 2 - 2 COPYRIGHT © 2000 CANON INC. Image signals read by the contact image sensor are image-processed by the A/D converter in the gate array. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON) Outline of Electrical ...System Figure 2-2 shows the outline of electrical system. The device driver installed in the main PCB. CPU is not equipped in...
...array S1 Home position sensor Q4 Figure 2-2 2 - 2 COPYRIGHT © 2000 CANON INC. Image signals read by the contact image sensor are image-processed by the A/D converter in the gate array. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON) Outline of Electrical ...System Figure 2-2 shows the outline of electrical system. The device driver installed in the main PCB. CPU is not equipped in...
Service Manual
Page 33
...+, MB-), which are sent to the drive motor via the motor driver. Motor driver PA+ J2-1 PB- -2 PB+ -3 PA- -4 Drive motor M1 Figure 2-14 2 - 16 COPYRIGHT © 2000 CANON INC. Host computer Control program Main PCB Gate array MA+ MBMB+ MA- CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON) Drive...
...+, MB-), which are sent to the drive motor via the motor driver. Motor driver PA+ J2-1 PB- -2 PB+ -3 PA- -4 Drive motor M1 Figure 2-14 2 - 16 COPYRIGHT © 2000 CANON INC. Host computer Control program Main PCB Gate array MA+ MBMB+ MA- CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON) Drive...
Service Manual
Page 37
... with the host computer via USB interface in the device driver installed on the host computer controls the scanner operation by setting a comand directly to the gate array register. The control program in the gate array. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU ...JAPON) The CPU is used as a work memory for image processing. Host computer Control program gate array USB I/F A0-7 D0-15 Buffer RAM ROM Control signal Figure 2-21 2 - 20 COPYRIGHT © 2000 CANON INC. ...
... with the host computer via USB interface in the device driver installed on the host computer controls the scanner operation by setting a comand directly to the gate array register. The control program in the gate array. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU ...JAPON) The CPU is used as a work memory for image processing. Host computer Control program gate array USB I/F A0-7 D0-15 Buffer RAM ROM Control signal Figure 2-21 2 - 20 COPYRIGHT © 2000 CANON INC. ...
Service Manual
Page 52
CHAPTER 3 IV. Removing the USB connector PCB 1) Remove the document cover. 2) Remove the document glass unit. 3) Insert flat-blade screw drivers into both sides of the USB connector PCB to remove the USB connector PCB. 1 q Connector J2 Figure 3-15 COPYRIGHT © 2000 CANON INC. USB Connector PCB 1. Figure 3-14 4) Disconnect the connector J2 to push it forward. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON) 3 - 11 ELECTRICAL SYSTEM A.
CHAPTER 3 IV. Removing the USB connector PCB 1) Remove the document cover. 2) Remove the document glass unit. 3) Insert flat-blade screw drivers into both sides of the USB connector PCB to remove the USB connector PCB. 1 q Connector J2 Figure 3-15 COPYRIGHT © 2000 CANON INC. USB Connector PCB 1. Figure 3-14 4) Disconnect the connector J2 to push it forward. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON) 3 - 11 ELECTRICAL SYSTEM A.
Service Manual
Page 55
Align the bend in the flat cable with a double-sided tape. Figure 3-19 3 - 14 COPYRIGHT © 2000 CANON INC. a. Precautions when atttaching the flat cable 1) Take care not to bend or deform the flat cable. 2) Locate the flat cable as follows. Straighten the bent end of the flat cable on the USB connector PCB side is attached with the left end corner of the base frame. 1 q Bend Figure 3-18 b. CHAPTER 3 2. The flat cable on the driver unit side and pass it through the ferrite core. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
Align the bend in the flat cable with a double-sided tape. Figure 3-19 3 - 14 COPYRIGHT © 2000 CANON INC. a. Precautions when atttaching the flat cable 1) Take care not to bend or deform the flat cable. 2) Locate the flat cable as follows. Straighten the bent end of the flat cable on the USB connector PCB side is attached with the left end corner of the base frame. 1 q Bend Figure 3-18 b. CHAPTER 3 2. The flat cable on the driver unit side and pass it through the ferrite core. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
Service Manual
Page 62
... contact image sensor. Drive motor not running Cause 1 : Faulty connection of the device driver Corrective action : Uninstall the device driver and reinstall it. Troubleshooting Malfunctions 1. Cause 3 : Faulty main PCB Corrective action :...Corrective action : Securely connect the flat cable to the scanner and host computer. COPYRIGHT © 2000 CANON INC. CHAPTER 5 B. Scanner not operating Cause 1 : Carriage lock is locked. Corrective action :... : Replace the drive unit. 4. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON) 5 - 3
... contact image sensor. Drive motor not running Cause 1 : Faulty connection of the device driver Corrective action : Uninstall the device driver and reinstall it. Troubleshooting Malfunctions 1. Cause 3 : Faulty main PCB Corrective action :...Corrective action : Securely connect the flat cable to the scanner and host computer. COPYRIGHT © 2000 CANON INC. CHAPTER 5 B. Scanner not operating Cause 1 : Carriage lock is locked. Corrective action :... : Replace the drive unit. 4. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON) 5 - 3
Service Manual
Page 64
... : ScanTest.exe (English/Japanese is switched according to the language to hardware or communication with a host computer. Outline Canon Scanner Test is utility software to check if faulty scanner operation is recommended.) 3) Windows 98 Operating System 4) Scanner Device Driver Macintosh platform 1) CanoScan N650U/N656U/N1220U 2) Power Macintosh 3) Macintosh OS (Version 8.5 or later) 4) Scanner Device...
... : ScanTest.exe (English/Japanese is switched according to the language to hardware or communication with a host computer. Outline Canon Scanner Test is utility software to check if faulty scanner operation is recommended.) 3) Windows 98 Operating System 4) Scanner Device Driver Macintosh platform 1) CanoScan N650U/N656U/N1220U 2) Power Macintosh 3) Macintosh OS (Version 8.5 or later) 4) Scanner Device...
Service Manual
Page 74
Corrective action : Install the device driver. Corrective Action : Replace the drive Unit. 4) "Unable to open file" is not detected by the host computer. COPYRIGHT © 2000 CANON INC. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON) 5 - 15 Cause 2...position sensor. Corrective action : Unlock the carriage lock. CHAPTER 5 4. Cause 1 : Device driver for error messages which may occur during Canon Scanner Test are described below. 1) When Canon Scanner Test is started from a CD-ROM or write-protect HDD. Cause 1 : Carriage ...
Corrective action : Install the device driver. Corrective Action : Replace the drive Unit. 4) "Unable to open file" is not detected by the host computer. COPYRIGHT © 2000 CANON INC. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON) 5 - 15 Cause 2...position sensor. Corrective action : Unlock the carriage lock. CHAPTER 5 4. Cause 1 : Device driver for error messages which may occur during Canon Scanner Test are described below. 1) When Canon Scanner Test is started from a CD-ROM or write-protect HDD. Cause 1 : Carriage ...