Domino Macrojet 2 User Manual

FAULT FINDING AND REPAIR
20509 Issue 7 Jan 2018 4-1
PART 4 : FAULT FINDING AND REPAIR
CONTENTS
Page
Introduction .......................................................................................... 4-2
Faults Related to the Ink System .......................................................... 4-2
Faults Related to the Print Head .......................................................... 4-4
Faults Related to the Electronic System .............................................. 4-5
User Related Faults .............................................................................. 4-5
Print Quality Faults ............................................................................... 4-6
Print Head ............................................................................................. 4-8
Bleeding the Print Head ................................................................... 4-8
Removing the Nozzle Plate .............................................................. 4-9
Testing a Solenoid ........................................................................... 4-10
Replacing a Solenoid ....................................................................... 4-11
Print Head Plunger Slug Replacement ............................................ 4-11
Replacing a Print Head .................................................................... 4-15
Ink System ............................................................................................ 4-16
Depressurising the Ink System ........................................................ 4-16
Pressurising the Ink System ............................................................ 4-17
Priming the Ink System .................................................................... 4-17
Filter and NRV Leaks ....................................................................... 4-19
Refurbishing a Spring NRV .............................................................. 4-19
Refurbishing a Plain NRV ................................................................. 4-20
Pressure Switch Replacement ......................................................... 4-21
Vacuum Switch Check ..................................................................... 4-23
Vacuum Switch Replacement .......................................................... 4-24
Pump Replacement ......................................................................... 4-25
Accumulator Check ......................................................................... 4-26
Reinflating the Accumulator Diaphragm .......................................... 4-26
Refurbishing the Accumulator ......................................................... 4-28
Removing the Ink System ................................................................ 4-29
Electronic System ................................................................................. 4-30
Fuse Replacement ........................................................................... 4-30
PCB Replacement ........................................................................... 4-30
Replacing the Universal Serial Interface PCB .................................. 4-31
Minimum Width Adjustment ............................................................. 4-36
Replacing a Solenoid Driver PCB .................................................... 4-37
Replacing the Low Voltage Power Supply PCB .............................. 4-37
Replacing the Motherboard ............................................................. 4-38
Fan or Filter Replacement ................................................................ 4-39
Cabinet Wiring Component Replacement ....................................... 4-40

Domino Macrojet 2 Specifications

General

Brand	Domino
Model	Macrojet 2
Category	Printer
Language	English