KIP 7170K, Service Manual

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K134sm7e2 7-31
7. 2. 2.16 Completely white (No image)
Check the following matters with the Pattern Print, pattern: #01_00.
If necessary use other Test Patterns.
Cause Checking
order
Checking Result Treatment
Developer Press
Unit
1 Is the Developer Unit correctly pressed
to the Drum?
No Check the Developer Press
Unit.
Driving mechanism
of Developer Unit
2 Does the Developer Roller rotate during
the print?
No Check the driving
mechanism of Process Unit.
Developer Bias 3 Is each Electrode Plate on the right of
the Developer Unit surely contacted to
the Electrode Plate on the machine
side?
No Try to install the Developer
Unit so that they are
contacted each other.
And supply the conductive
grease to the Electrode
Plates.
LED Head 4 Are connectors of signal cable firmly
connected to the LED Head?
No Connect them firmly.
Turn off the machine in the middle of
printing, and then check the toner
image on the Drum.
Is there any toner image on the Drum?
No Replace the LED Head.
Transfer/Separation
Corona
5 Is the Transfer Corona Wire broken? Yes Replace it.
Is the Transfer/Separation Corona Unit
correctly installed to the machine?
No Install it correctly.
If the high voltage leaking from the
Transfer Corona?
Yes Check the Transfer /
Separation Corona to find
the cause for leaking.
Lead Wire of
Transfer Corona
6 Is the connection of Lead Wire correct? No Connect it correctly.
Is the resistance of Lead Wire about 10
kilo ohms, which connects HV Power
Supply and the Transfer Corona?
No Replace the Lead Wire.
HV Power Supply 7 Can you fix the problem if you replace
the HV Power Supply?
Yes OK
PW13420 PCB 8 Can you fix the problem if you replace
PW13420 PCB?
Yes OK
7. 2. 2.17 Completely black
Check the following matters with the Pattern Print, pattern: #01_00 and pattern: #04_00.
If necessary use other Test Patterns.
Cause Checking
order
Checking Result Treatment
Image Corona or
HV Power Supply
PCB
1 Is the Image Corona Wire broken? Yes Replace it.
Is the tension of the Corona Wire
correct?
No Replace it.
Is the Corona Wire correctly stretched
with the spring?
No Check whether or not the
spring is transformed.
Is a proper high voltage supplied to the
Image Corona?
No Adjust the high voltage, or
replace the HV Power
Supply PCB
Is the housing of Image Corona
insulated from the ground?
No Replace the Zener PCB.
PW13420 PCB 2 Can you fix the problem if you replace
PW13420 PCB?
Yes OK