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A20736 B0
Servicing and troubleshooting
4.3
Preliminary checks
All troubleshooting operations should begin with the preliminary checks.
These are used to spot problems such as soiled parts, ink leakages or faulty electrical or hydraulic
connections with the naked eye.
Stop the printer and unplug it from the mains. Check the points below:
Check
Type of problem sought
External
appearance
Console and operator interface Dents or cuts
Printing head
Soiled electrodes
Damaged or badly set mechanical parts
Leakage
Accessory connections
Disconnections
Power cuts
Ink circuit
appearance
Tanks
Tanks open or damaged
Leakage
Ink and additive reservoirs empty
Ink appearance (odor, consistency)
Additive appearance (odour, colour)
Hydraulic connections and
tubes
Leak
Folded, damaged or cut pipe
Electrical connections of the
various parts
Bad connections:
- of the ink circuit loom,
- of the ink level detector (top of ink reservoir),
- of the fan,
- of the viscometer,
- of the electrovalves.
Electronic
compartment
Presence of various boards
present in the electronic
compartment.
Board missing
Connections in the electronics
compartments
Bad connections:
- of the main board,
- of the "Front" board,
- of the "Motor control" board,
- of the power supply board.
Industrial
interface
compartment
Electrical connections
Bad connections:
- of a ribbon cable of the umbilical to the main board,
- of the EHT unit to the corresponding cables of the umbilical,
- of the ribbon cable on the industrial interface board,
- on the industrial interface board terminals.
Pneumatic connections
Bad connections:
- air hoses
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