E202 (Scanner Home Position Is Not Detected; No Code Indication Is Made.); E220 (The Scanning Lamp Turns On Wrongly.) - Canon GP215 Service Handbook

16 E202 (Scanner home position is not detected; no code indication is
made.)
Cause Step
1
Scanner home 2
position sensor
(PS1)
Scanner motor
DC controller
PCB
17

E220 (The scanning lamp turns ON wrongly.)

Cause Step
1
Scanning lamp 1
(low intensity)
DC controller 2
PCB
Composite
power supply
PCB
Checks
Is the scanner at home position
when 'E202' is indicated?
Is the scanner home position
sensor (PS1) normal?
Replace the scanner motor. Is
the problem corrected?
Checks
Does the scanning lamp turn
ON?
Are both ends of the scanning
lamp black?
Replace the DC controller
PCB. Is the problem corrected?
TROUBLESHOOTING MALFUNCTIONS
Yes/No
YES See "The scanner fails to move
forward/in reverse."
NO Check the wiring from the DC
controller PCB to PS1; if nor-
mal, replace PS1.
YES End.
Replace the DC controller
PCB.
Yes/No
NO See "The scanning lamp fails
to turn ON."
YES Replace the scanning lamp.
• The scanner may not be
able to move forward
because of low intensity.
YES Replace the DC controller
PCB.
NO Check the wiring of the DC
controller PCB and the com-
posite power supply PCB; if
normal, replace the composite
power supply PCB.
Action
Action
4–11