ci5000 Series Printer Technical Service Manual
Version 0.1
6-29
A variable high voltage output of 0V to 8000 V at 120ì amps is provided to establish the electrostatic field
between the Deflector Plates in the Printhead. If the Defection plates are shorted, this error/fault will
occur. This can happen if there is ink or solvent on the Positive/Angled plate. If the printhead was just
cleaned with solvent and not properly dried the solvent can short the plate causing the error/fault. Also is
ink builds up on the Positive/Angled plate and reaches any grounded surface of the printhead like the
gutter block or other plate, this too will cause the error/fault. This buildup can be caused by improper
modulation, excessive vibration, Static, scratches on either of the plates, etc.
Corrective Action:
1. Clean and dry the plates. (See Section 6 Proper Cleaning Procedure)
2. Check for scratches on both HV Plates
3. Verify the HV Trip set point by starting from the main screen press the [Menu]
tab and
then select [Service]
. Press the [HV Trip]
button in the Navigational Tool Bar. Note the
setting or recalibrate the setting by making sure the HV Plates are clean. Ensure the Printhead
Cover is on. Then press the [Automatic]
button. This sequence will take about 30 seconds.
When finished press the [Back]
button 2 times to return to the Main Screen.
4. Watch for Ink buildup due to lack of grounding.
5. Check the Jet alignment. (See Section 9: Calibration for the proper jet alignment procedure)
6. Ohm the 22M resistor & replace (if needed) the HV Sense Resistor.
7. Check the Positive HV Plate for cracks around the metal plate and Epoxy
Pressure Sensor Failure
Definition:
The Pressure sensor reads the pressure at the Ink Manifold, if the reading shows a short or is not giving
a reading, this error/fault will be displayed.
Corrective Action:
1. Check the wires in the Pressure Transducer cable connector at the CPU board, (J13) and make
sure they are all connected and not broken or loose.
2. Ensure the Pressure Transducer cable is tightened down on the Pressure Transducer completely.
3. Replace the Pressure Transducer & or Cable
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