Gestetner B147 Service Manual page 245

SC No. Item
SC 751 Booklet finisher The paper edge and size
punch-unit sensors receive the 2.5-volt
sensor error 1 light or weaker light even when
the source emits 4.4-volt light.
SC 752 Booklet finisher • The registration motor
punch-unit
registration
motor error
• The registration motor
SC 753 Booklet finisher • The punch motor starts to
punch-unit
punch motor
error
• The punch motor start to
SC 754 Booklet finisher The A/D inputs of the sensor
punch-unit are not corrected by varying
sensor error 2 the D/A outputs.
SC 818 Watch-dog While the system program is
error running, other processes do
not operate at all.
SM
Definition
• Defective sensors
• Dirty sensors
• Incorrect assembly of
drives the slide unit to the
rear side for 1 second. But
• Loose connection of
the home position sensor
does not turn on.
• Defective home
drives the slide unit to the
• Loose connection of
front side for 1 second. But
the home position sensor
does not turn off.
• Malfunction of the
drive the punch cams. But
the controller does not • Loose connection of
receive the encoder-lock
signal for 60 milliseconds.
• Defective home
drive the punch cams. But
• Loose connection of
the home positions sensor
does not turn on for 250
milliseconds.
• Loose connection of
• Defective encoder
• Defective sensor
• Dirty sensor
• Defective controller
• Software error
Related
Possible Cause
SCs
the registration motor
the registration motor
position sensor
the home position
sensor
punch motor
the punch motor
position sensor
the home position
sensor
the encoder sensor
sensor
4-43
Troubleshooting Procedure
1. Turn the main switch off and on.
2. Clean the sensors.
3. Replace the sensors.
1. Turn the main switch off and on.
2. Check the connection of the
registration motor.
3. Check the connection of the home
position sensor.
4. Replace the home position sensor.
5. Replace the registration motor.
1. Turn the main switch off and on.
2. Check that the connection of the
punch motor.
3. Check the connection of the home
position sensor.
4. Check the connection of the encoder
sensor.
5. Replace the home position sensor.
6. Replace the encoder sensor.
7. Replace the punch motor.
1. Turn the main switch off and on.
2. Clean the sensors.
3. Replace the sensors.
1. Turn the main switch off and on.
2. Replace the controller.
3. See NOTE 1 at the end of the SC
table
SC TABLE
Type
B
B
B
B
CTL
B147/B149/B190