Kyocera KM-2810, Service Manual

Page: 83 / 180

2H9
1-4-11
(1) Completely blank printout.
(2) All-black printout.
Print example Causes Check procedures/corrective measures
Connection failure with DP connector
(Only when the option DP is installed) If a blank copy is made because the original loaded in the DP
is not fed after the Start key is pressed:
Turn the main power switch off, investigate the DP connector
connection, and firmly connect the DP connector.
Defective drum unit or developing
unit. Open the front cover and check that the drum unit and devel-
oping unit are correctly seated (See page 1-5-26 and 1-5-25).
Investigate that the terminals between the main charger unit
and the drum unit are not in loose contact (See page 1-5-27)
Defective transfer bias output or
developing bias output. Replace the high voltage PWB (See page 1-5-41).
Poor contact of developing bias termi-
nal (spring) and high voltage output
terminal B (J401, J402, J403) on the
high voltage PWB.
Poor contact of transfer bias terminal
(spring) and transfer bias terminal T
(J201, J202, J203) on the high volt-
age PWB. Check the high voltage PWB visually and correct or replace if
necessary (See page 1-5-41).
Defective laser scanner unit. Replace the laser scanner unit (See page 1-5-16).
Defective control PWB. Replace the control PWB (See page 1-5-35).
Print example Causes Check procedures/corrective measures
Defective main charger unit. Open the front cover and check that the drum unit and devel-
oping unit are correctly seated (See page 1-5-26 and 1-5-25).
Investigate that the terminals between the main charger unit
and the drum unit are not in loose contact (See page 1-5-27)
Poor contact of main charger terminal
(spring) and main charger output ter-
minal M on the high voltage PWB. Check the high voltage PWB visually and correct or replace if
necessary (See page 1-5-41).
Defective main charging output. Replace the high voltage PWB (See page 1-5-41).
Broken main charger wire. Replace the main charger unit (See page 1-5-27).
Defective control PWB. Replace the control PWB (See page 1-5-35).
DP connector
DP