Kyocera Ri 4530 Copystar, Service Manual

Page: 175 / 384

2BC/D
1-5-32
Code Contents
Remarks
Causes Check procedures/corrective measures
C6400
C7100
C7300
C7800
C7810
Zero-crossing signal problem
• The main PCB does not detect the
zero-crossing signal (Z CROSS SIG)
for the time specified below.
At power-on: 3 s
Others: 5 s
Toner sensor problem
• The toner sensor output voltage is
outside the range of 0.5 to 4.5 V dur-
ing copying or in maintenance item
U130.
• The toner sensor control voltage can-
not be set within the range in mainte-
nance item U130.
Toner hopper problem
• Toner level is not detected when
toner empty is detected.
Broken external temperature ther-
mistor
• The input voltage is 4.5 V or more.
Short-circuited external temperature
thermistor
• The input voltage is 0.5 V or less.
Poor contact in
the connector ter-
minals.
Defective power
source PCB.
Defective main
PCB.
Defective toner
sensor.
Poor contact in
the toner sensor
connector termi-
nals.
Defective devel-
oper.
Defective toner
level detection
sensor.
Poor contact in
the toner level de-
tection sensor
connector termi-
nals.
Poor contact in
the humidity sen-
sor PCB connec-
tor terminals.
Defective external
temperature ther-
mistor.
Defective external
temperature ther-
mistor.
Defective humidity
sensor PCB.
Check the connection of connectors CN17
on the main PCB and CN2 on the power
source PCB, and the continuity across the
connector terminals. Repair or replace if
necessary.
Check if the zero-crossing signal is output
from CN2-7 on the power source PCB. If
not, replace the power source PCB.
Replace the main PCB if C6400 is de-
tected while CN2-7 on the power source
PCB outputs the zero-crossing signal.
Replace the toner sensor.
Reinsert the connector. Also check for con-
tinuity within the connector cable. If none,
remedy or replace the cable.
Replace the developer.
Replace the toner level detection sensor.
Reinsert the connector. Also check for con-
tinuity within the connector cable. If none,
remedy or replace the cable.
Reinsert the connector. Also check for con-
tinuity within the connector cable. If none,
remedy or replace the cable.
Replace the humidity sensor PCB and
check for correct operation.
Replace the humidity sensor PCB and
check for correct operation.
Replace the humidity sensor PCB and
check for correct operation.
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