Cannot Read Display - Dover markem-imaje 5200 Service Manual

SECTION 5 Troubleshooting
Symptom
Ink Delivery Module
(IDM) (continued)
Ink line connection Tight or broken ink adapter
Ink Delivery Module
(IDM) Will Not Heat

Cannot Read Display

Heartbeat LED on
Control Board blinks
5–8
Possible Cause / Problem
Holding chamber
fitting
Open hold or melt over-
temperature thermostat
(device opens at 149° C).
Failed hold or melt thermistor
(device should read
approximately 100k ohms at
25° C)
Failed hold heater (device
should read 36 ohms)
Failed melt heater (device
should read 72 ohms)
Electrical connection
Failed I/O Panel assembly
(backplane)
Incorrect line voltage
Incorrect contrast setting
Electrical connection
Reference / Action
Check that the filter screws
are tightly secured to the
holding chamber.
Check for broken filter O-ring.
Replace if necessary.
Check for broken pump piston
O-ring. Replace if necessary.
IN, 2, Connecting the Ink Line
Inside the Enclosure
Push appropriate thermostat
button to reset.
SE 4, Ink Delivery Module;
Melt Thermistor
SE 4, Ink Delivery Module;
Hold Thermistor
SE 4, Ink Delivery Module;
Hold Heater
SE 4, Ink Delivery Module;
Melt Heater
5200/5400 Block Diagram
SE, 6, Replacing the I/O Panel
Assembly
IN, 2, Electrical
IN, 2, Changing the Voltage
Configuration
OP, 5, Unreadable Display
Hold down STOP key and
press Up-Arrow to lighten or
Down-Arrow to darken
display.
SE, 4, User Interface;
Contrast
5200/5400 Block Diagram
Verify electrical connections
inside User Interface
enclosure and test for 14VDC
at UI Interconnect Board.
0855855eng 6/08