5. Checking the Environment Sensor1) Start service mode ( ), and check the temperature/humidity on the controlpanel display; then, record the values.Data A‘RTMP’ °C ......Data A1‘RHUM’ % ......Data A22) Press the Reset key twice, and turn OFF the power switch.3) Remove the environment sensor, and insert the environment sensor tool (FY9-3014)in its place.4) Turn ON the power switch, and leave the machine alone for 5 min.5) Start service mode ( ), and check the temperature/humidity on the controlpanel display; record the values.Data B‘RTMP’ °C ......Data B1‘RHUM’ % ......Data B26) Compare data A and data B.• difference between data A1 and data B1 is 0 ±5• difference between data A2 and data B2 is 0 ±20If the difference between data A and data B is outside the specification, replace theenvironment sensor.7) Press the Reset key twice, and turn OFF the power switch.8) Remove the environment sensor tool, and install the environment sensor.9) Install all covers.Caution:The environment sensor tool (FY9-3014) is adjusted at the factory to high precision;keep it in an airtight case with a drying agent.6. Checking the PhotointerruptersThe copier’s photointerrupters may be checked either using a conventional meter orservice mode.a. Using a Meter1) Set the tester’s range to 30VDC.2) Connect the tester’s - probe to GND on the DC controller PCB.3) Connect the tester’s + probe to the terminal (DC controller PCB) shown.4) Make a check as instructed.b. Using Service Mode1) Open the front door, and insert the door switch actuator into the door switchassembly.2) Press the service switch with a clip over the cover.3) Press , , and in sequence on the control panel.4) Using the keypad on the control panel, enter the address of the appropriatephotointerrupter, and check the indication.Caution:The machine’s motor can start to operate in response to the changes in the sensorstate; take adequate care.]2]]1]]1]COPYRIGHT © 1997 CANON INC. CANON NP6045 REV. 1 MAR. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 10 TROUBLESHOOTING10-46
