Main
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Printing history
FCC Statement (U.S.A.)
User Instructions:
VDE Statement
Material Safety Data Sheet
Warranty or Damage Claims
Table of Contents
Chapter 1 General Description .......................................1-1
Chapter 2 Theory of Operation.......................................2-1
Chapter 3 Maintenance ...................................................3-1
Chapter 4 Troubleshooting.............................................4-1
Chapter 4 Troubleshooting (cont)
Chapter 5 Assembly\Disassembly................................5-1
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Chapter 5 Assembly\Disassembly (cont)
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List of Illustrations
Chapter 1 General Description
Chapter 2 Theory of Operation
Chapter 3 Maintenance
Chapter 3 Maintenance (cont.)
Chapter 4 Troubleshooting
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Chapter 5 Assembly/Disassembly
Chapter 5 Assembly/Disassembly (cont.)
Chapter 6 Parts List
List of Tables
General Description 1
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Warnings, Cautions and Notes
NOTE
Printer Specifications
Contents of this Service Manual
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Technical Support
2
Theory of Operation
NovaJet 800 Series Printers General Block Diagram
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Paper (Media) Axis Drive
The Carriage Axis Drive
Media Feed and Take-Up System
Main PWA (Printed Wiring Assembly)
Main PWA LED Status Indicators
Microprocessor (CPU)
Gate Array
Digital Signal Processor (DSP)
Memory Circuits
Flash EEPROM
SDRAM
Serial EEPROM
Stepper Motor Controller
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Servo Motor Controller
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Interface Circuits: Serial & Parallel
Carriage Assembly Circuits
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Control Panel
*
Power Supply
Thermal Dryer Assembly
Sensor Status Menu
Beeper and Fans
3
Maintenance
Scheduled Maintenance
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Service Station Cleaning
Linear Encoder Strip Cleaning
Trailing Cables Cleaning
Platen/Vacuum Hole Cleaning
Cartridge Dimples Cleaning
Flex Cable Contact Cleaning
Clean and Inspect Stepper Motor Gears
Clean and Inspect Main PWA
Clean and Inspect Carriage Assembly
Dryer Cleaning
Reseat Connectors on Main PWA and Carriage Boards
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Replace Trailing Cables
Replace Carriage Cover/Carriage Bushings
Servo Motor Winding Resistance Check
Stepper Motor Winding Resistance Check
*
A
B
Power Feed and Take-Up Motor Winding Resistance Check
Banding: Hardware vs Software
Banding Differences
HARDWARE
SOFTWARE
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Banding Causes & Quick Analysis Horizontal Banding Problems
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Vertical Banding Problems
Line Quality Problems (Overspray)
Alignments/Adjustments
Slide Shaft Profile Adjustment
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Head Height Alignment Procedure
HEAD HEIGHT
CARTRIDGE
JET PLATE PLATEN
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Color Calibration
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Deadband Alignments
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Color Deadband Alignment
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Paper Axis Calibration
33" or
83.82 cm
Diagnostics Menu
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Firmware Download/Upgrading for the PC
Firmware Download/Upgrading for the MAC
Internal Cabling and Signal Flow Diagrams
Maintenance 3-46
NovaJet 800 Series Service Manual
Figure 3-31. Carriage PWA Connections Diagram.
Maintenance 3-47
NovaJet 800 Series Service Manual
Figure 3-32. Leg Harness Connections Diagram.
MAINTENANCE
Troubleshooting 4
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Print Quality Issues Cartridge Misfires (Intermittent Banding)
Failure Analysis - Print Misfires
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Common Misfire Problems
Clearing Cartridge Misfires
Multiple Cartridge Failures
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Microbanding
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Banding Differences
Horizontal Banding
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Vertical Banding
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Line Quality Problems (Overspray)
Cartridge Warranty
Cartridge Maintenance & Testing
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Ink Starvation
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Failure Analysis:
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Ink Dropout
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Color Test Problems
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Unrecognized Cartridge Error Message
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Paper Sensor Error
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Encoder Sensor Error
AutoLoad Paper Sensor Error
Carriage Axis Error
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Failure Analysis
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Initialization Failure
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Media Sensor Reference Points Not Initialized Hardware Failures/Diagnostic Tests
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Dryer Failure/Sensor Error
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Intermittent Problems/Continuity
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Reinitializing the Printer
Printer Hesitation/Networking Problems
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Parallel Port Test
2. Refresh printer firmware. Refer to the Firmware Download proce- dure.
Firmware Downloading Procedures NJ850 Printer
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NJ880 Printer
Expanded Instructions for Firmware Download/Upgrade
INTERNET: http://www.encad.com (Downloads - Software)
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5
Assembly\Disassembly
WARNING
Remove the Left, Top, and Right Covers
To remove the Right Cover Assembly:
To remove the Left Cover Assembly:
Inst all the Lef t, Top, and Right Covers
Remove the E-Connect Network Assembly
Inst all the E-Connect Network Assembly
Remove the Keypad and Display
Install the Keypad and Display
Remove Memory Module
Install Memory Module
Remove the Main Printed Wiring Assembly (PW A)
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Install the Main Printed Wiring Assembly (PWA)
Remove Power Supply, Cooling Fan, and AC Entry Module
To remove the Cooling Fan and AC Entry Module:
Inst all the Power Supply, Cooling Fan, and AC Entry Module
To install the Cooling Fan and AC Entry Module:
Remove Servo Motor
Be careful not to strip the head of the screw or to cause damage to the Encoder Strip.
Install Servo Motor
Remove the Ink Delivery System
A B
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Install the Ink Delivery System
Remove the Carriage Assembly, Carriage Belt, and the Frame Tensioner
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Inst all the Carriage Assembly, Carriage Belt, and the Frame Tensioner
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Remove the Carriage PWA
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Install the Carriage PW A
Remove the Paper Sensor or the Encoder Sensor
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Install the Paper Sensor or the Encoder Sensor
Replacing the Floating Carriage Cover Bushings
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Replacing the Carriage Bushings
TABS
Remove the Service Station
Install the Service Station
Remove the T railing Cable Assembly
Install the T railing Cable Assembly
Remove the Stabilizer Bracket and Encoder Strip
Install the Stabilizer Bracket and Encoder Strip
Remove the Y-Arm Assembly, Pinch Rollers, Slide Shaft, and AutoLoad Sensor
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Install the Y -Arm Assembly, Pinch Rollers, Slide Shaft, and AutoLoad Sensor
Remove the Gap Sensor (NovaJet 880 only)
Remove the Lower Roller Assembly, Stepper Motor and Vacuum Fan (NovaJet 850)
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Inst all the Lower Roller Assembly, Stepper Motor and Vacuum Fan (NovaJet 850)
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Remove the Lower Roller Assembly, Stepper Motor and Vacuum Fan (NovaJet 880)
Avoid damaging the encoder strip!
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Lower Roller Installation Tip (NovaJet 880)
Y -Arm Assembly Inst allation Tip (NovaJet 880)
Remove the Media Take-Up and Feed Sensor Brackets and Sensors
Install the Media Take-Up and Feed Sensor Brackets and Sensors
Remove the Media Take-Up and Feed Motors
Inst all the Media Take-Up and Feed Motors
Remove the Thermal Dryer Assembly
Inst all the Thermal Dryer Assembly
Remove the Thermal Dryer Right Endcap Assembly
This assembly emits heat by radiation.
Inst all the Thermal Dryer Right Endcap Assembly
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Parts List
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Index
A
B
C
D
N
O
P
R
S
