C37 (Optical System Malfunctions - Minolta CF910 Service Manual

(9) C06 , C33
1. C0650 (Scanner Home Position Sensor PC1 Malfunction) / C0660 (Scanner Overrun
Failure)
• A/D Converter Board PWB-B
• IR Control Board PWB-C
• Motor Drive Board PWB-G
<Troubleshooting Procedure>
Step
1 Does the Scanner make the initial opera-
tion when the Power Switch is turned ON
or the Front Door is opened and closed?
2 Remove the Original Glass and block
PC1. Does "IR HOME" of the "Switch 3
(Others)" screen change from OFF to ON
at this time?
3 Set the "Top Image" value to "0" and FD
zoom ratio to "1.000" of the IR Area and
then turn OFF and ON the Power Switch.
Does the malfunction occur at this time?
, C37 (Optical System malfunctions)
Possible Defective Components
Check Item
• Scanner Home Position Sensor PC1
• Scanner Motor M1
Result
NO A. Check to see if there is any
B. Check for loose connectors
C. Check the motor for over-
NO Check the wiring between
PWB-B and PC1 and, if it is
intact, change the sensor.
NO Perform the IR Area adjust-
ment.
T-50
1154C19TAA
Action
misfeed or malfunction that
has occurred in another
location.
on PWB-G.
load and, if it is not over-
loaded, change M1.