COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)Note:1. The notation “zz” shown on the display (2nd row) is for use at the factory for checksand is not relevant to servicing work.2. Each sensor has its own response time, some requiring as much as about 5 sec.Be sure to allow an adequate period of time before making a decision on each sen-sor.3. If multiple sensors are turned on at the same time, the result will be the sum of thecodes obtained for all sensors (in hexadecimal notation).4. To execute sensor monitor mode, be sure to remove the intermediate transfer drum,all cartridges, and secondary transfer belt assembly before starting service mode.(Otherwise, you could inadvertently touch operating parts.)Further, you need to remove the following parts for respective sensors in view of thetype of work to perform:• For PS1903 and PS5, the fixing assembly.• For PS11, the upper cover assembly.• For PS1207, the cassette 1.• For PS1208, the cassette 2.• With the Reader Unit Installed1) Start service mode.2) Select COPIER>I/O>DC-CON or R-CON in sequence to bring up the screen shownin Figure 10-102.3) Make checks as shown. (See pp. 10-5 ff.)Figure 10-102CHAPTER 10 TROUBLESHOOTING10-4P001 xxxxxxxxP002 xxxxxxxxP003 xxxxxxxxP004 xxxxxxxxP005 xxxxxxxxP006 xxxxxxxxP007 xxxxxxxxP008 xxxxxxxx7ÅEÅEÅEÅEÅEÅE0 < 1/10 > < READY >P008 xxxxxxxxAddress bit 0bit 1:bit 7Display Adjust Function Option Test CounterI/ODownload free service manual at http://printer1.blogspot.com