Gestetner B147 Service Manual page 221

SC No. Item
SC 285 Line position Line position adjustment fails
adjustment three consecutive times.
(MUSIC) error
SC 370 TD sensor [K]: During the developer
Adjustment initialization, the output value
error of the TD sensor is without the
adjustment range (3.0 ± 0.1V).
SC 371 TD sensor [Y]:
Adjustment
error
SC 372 TD sensor [C]:
Adjustment
error
SC 373 TD sensor [M] :
Adjustment
error
SC 374 Vt error [K] During the image
development, Vt value is less
SC 375 Vt error [Y]
than 0.5V.
SC 376 Vt error [C]
SC 377 Vt error [M]
SM
Definition Possible Cause
• Pattern sampling
error due to
insufficient image
density of patterns
used for the
adjustment
• Inconsistency in the
sampling line position
adjustment pattern
due to dust on the
pattern, damage to
the OPC drum,
damage or toner
dropped on the
transfer belt, or a dirty
or defective ID sensor
• Poor connection (TD
sensor outputs is less
than 0.5V.)
• Defective TD sensor
• Poor connection (TD
sensor outputs is less
than 0.5V.)
• Defective TD sensor
Related
Troubleshooting Procedure
SCs
1. Turn the main switch off and on.
2. Check and fix the problem that
causes low image density. .
3. Clean or replace the transfer belt
and/or the ID sensor.
4. Replace the PCU or clean the
development unit that causes toner to
drop on the transfer belt.
1. Turn the main switch off and on.
2. Reset the related color development
unit.
3. Replace the related color
development unit.
1. Turn the main switch off and on.
2. Reset the related color development
unit.
3. Replace the related color
development unit.
4-19
SC TABLE
Type
D
D
D
B147/B149/B190