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IMAGE QUALITY RAPs
2/99
IMAGE QUALITY DEFECTS
3-4
DocuPrint C55/C55mp/[NC60]
Defect Name / Description
Possible Causes
Corrective Action
2. BACKGROUND (BLACK).
1. Developer Failure.
1. Replace the Black Developer Module.
2. New developer assembly did not initialize.
2. Run a Diagnostic Sheet and check the Toner
Concentration Setpoints for newly installed
developer assembly. If the Setpoints are at
70 (default), replace the developer assembly.
3. No Black Developer Bias.
3. Refer to BSD 9.1 and check the Black
Developer Bias voltage. If the voltage is
present, check the Black Developer Bias
lead for an open. If no bias is present,
replace the High Voltage Power Supply. If
the problem still exists, replace the black
developer module.
3. BACKGROUND (COLOR).
1. Developer Failure.
1. Replace the Color Developer Module.
2. No Grid Low signal.
2. Refer to BSD 9.1 and check the Grid Bias
(Low) signal CN106-8 for a short to ground.
If OK, replace the color developer housing.
3. Temperature/RH Sensor failure.
3. If the readings on the diagnostic sheet are
out of range (RH=0 or RH > 100, or
Temp=0), refer to the chart below:
If the wiring checks OK, replace the Tem-
perature/Humidity Sensor.
Diag.
Sheet
Refer to BSD 9.19 and check
:
RH=0
CN105-1, Humidity Sense, for a short to ground.
RH
>
100 CN105-1, Humidity Sense, for an open.
CN105-2, Humidity Sense, GND for an open.
Temp=0
CN105-5, Temp. Sense, for an open or short to
ground.
Summary of Contents for DocuPrint C55
Page 14: ...SERVICE CALL PROCEDURES 2 99 NOTES 1 6 DocuPrint C55 C55mp NC60 Notes ...
Page 56: ...OTHER FAULTS RAPs 2 99 NOTES 2 42 DocuPrint C55 C55mp NC60 NOTES ...
Page 76: ...IMAGE QUALITY SPECIFICATIONS 2 99 NOTES 3 20 DocuPrint C55 C55mp NC60 NOTES ...
Page 130: ...REPAIRS ADJUSTMENTS 2 99 NOTES 4 42 DocuPrint C55 C55mp NC60 NOTES ...
Page 216: ...GENERAL PROCEDURES 2 99 NOTES 6 18 DocuPrint C55 C55mp NC60 Notes ...
Page 252: ...GENERAL PROCEDURES 2 99 NOTES 6 54 DocuPrint C55 C55mp NC60 NOTES ...
Page 272: ...GENERAL PROCEDURES 2 99 NOTES 6 74 DocuPrint C55 C55mp NOTES ...
Page 274: ...GENERAL PROCEDURES 2 99 NOTES 6 76 DocuPrint NC60 NOTES ...