Stratasys J750/J735/J720 User Guide
4 Operating and Maintaining the Printer
DOC-08040 Rev. R
4-124
Test Name
Description
Possible Reason for Failure
Head/Block Heaters
Tests the heaters in the print heads
and in the print-block body.
Faulty heaters or thermistors.
System Voltages
Checks if the following voltages are
within 5% of the required voltage:
• 40V to the print heads by the VPP
power supply
• 12V to the height thermistors by
the VDD power supply
• VPP power supply:
Faulty head driver.
• VDD power supply:
Faulty height thermistor.
UV Lamps
Tests each UV lamp at the High
Quality power level.
• Faulty UV lamp.
• Faulty UV power supply.
• Disconnected UV cable.
Axes Limits
Tests the hardware and software
limits of all axes.
Faulty hardware sensors.
Wrong
Max Position
parameter.
Block Filling
Analyzes the thermistor readings
when the block is full and when it is
empty.
Faulty thermistor.
Encoder Steps Count Tests the encoder's reliability by
comparing readings from multiple
runs along the X-axis.
Misaligned or faulty encoder.
Vacuum Test
Tests the vacuum level in the print
block.
• Faulty vacuum sensor.
• Vacuum leakage.
• Wrong parameters.
Interlock
Tests the interlock in the printer
cover.
• Failure of interlock mechanism.
• Faulty latch.
• Disconnected cable.
Version Tests
Checks the compatibility between
the software and component
firmware versions.