CDK Global 7450 User manual

B25201, published September 10, 2015
CDK 7450 F&I Printer
Service Guide

I
Confidential and proprietary information, for internal purposes only. The disclosure or use of the
information contained herein to any person who is not an employee of CDK Global, LLC, or its affiliates
is expressly prohibited.
© 2015 CDK Global, LLC. All rights reserved. The CDK logo is a trademark of CDK Global, LLC.
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II
Trademark Credits:
EPSON is a registered trademark of Seiko Epson Corporation.
ESC/P-K2 is a registered trademark of Seiko Epson Corporation.
IBM is a registered trademark of International Business Machines Corporation.
IBM 2391 is a registered trademark of International Business Machines Corp.
OKI is a registered trademark of Oki Data Corporation.
OKI 5530SC is a registered trademark of Oki Data Corporation.
Windows is a registered trademark of Microsoft Corporation.
Regulatory Statement:
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2)
this device must accept any interference received, including
interference that may cause undesired operation.
The manufacturer is not responsible for any radio or TV
interference caused by unauthorized modifications to this
equipment. Such modifications could void the user’s
authority to operate the equipment.
FCC
Class B
LISTED
16PU
NWGQ
E247562
120VAC ~ 60Hz ~ 2.3A

III
Table of Contents
Safety ........................................................................................................................................ 1
Control Panel............................................................................................................................. 3
Control Panel Key Functions.................................................................................................. 3
Basic Printer Functions....................................................................................................... 3
Calibration/Default Reset.................................................................................................... 4
Diagnostic Test Functions................................................................................................... 5
Printer Alignment Functions................................................................................................ 5
Alignment/Calibration & Test...................................................................................................... 6
HA Print Gap.......................................................................................................................... 6
HA GAP ADJ DOWN.......................................................................................................... 6
HA GAP ADJ UP................................................................................................................. 7
Multi-Part Print Gap................................................................................................................ 8
Horizontal Print Registration................................................................................................... 9
Tear Off.................................................................................................................................10
Cut-sheet pinch roller adjustment..........................................................................................10
Initialization #1.......................................................................................................................11
Initialization #2 (Cut-sheet)....................................................................................................11
Initialization #2 (Tractor)........................................................................................................12
Initialization #3.......................................................................................................................12
Diagnostic Test Functions .....................................................................................................14
Hexadecimal Dump Function.............................................................................................14
Self-Test Function..............................................................................................................14
Interface....................................................................................................................................15
USB Specifications................................................................................................................15
Ethernet Specifications..........................................................................................................15
Serial Specifications (DB-9)...................................................................................................16
Firmware Upgrade....................................................................................................................17
Mechanical Replacement..........................................................................................................19
Top Enclosure and Printer Cover replacement......................................................................19
Paper Rack Assembly replacement.......................................................................................19
Mechanism replacement .......................................................................................................20
Bottom Enclosure replacement..............................................................................................20

IV
Printed Circuit Board Assembly replacement.........................................................................21
Main Printed Circuit Board Cabling........................................................................................22
Print Head.............................................................................................................................23
FFC Cable replacement ........................................................................................................24
Ribbon Guide Assembly replacement....................................................................................25
Carriage Motor Assembly replacement..................................................................................26
Carriage Timing belt replacement..........................................................................................27
Platen replacement................................................................................................................29
Friction Mechanism replacement...........................................................................................30
Ribbon Motor Assembly replacement....................................................................................31
HA Motor replacement...........................................................................................................32
Paper Edge Sensor replacement...........................................................................................33
Carrier replacement...............................................................................................................34
Sensor replacement ..............................................................................................................37
FC Home Sensor Assembly replacement...........................................................................37
FC Home Sensor B Assembly replacement.......................................................................38
Home Sensor Assembly replacement................................................................................39
Paper Sensor Assembly replacement................................................................................39
Paper Edge Sensor replacement.......................................................................................40
Sensor Harness A replacement .........................................................................................40
HA Sensor Assembly replacement.....................................................................................40
Parallelism Adjustment..........................................................................................................41
F Guide Shaft Parallelism Adjustment................................................................................41
Lubrication.............................................................................................................................42
Electronics................................................................................................................................44
Main PCBA............................................................................................................................44
HA Motor Driver Circuitry...................................................................................................51
Ribbon Motor Driver Circuitry.............................................................................................52
MC Motor Driver Circuitry...................................................................................................53
LF/HC Motor Driver Circuitry..............................................................................................54
Print Pin Driver Circuitry.....................................................................................................56
Print head Pin Configuration ..............................................................................................57
Detecting Circuitry..............................................................................................................58

V
Home Sensor.....................................................................................................................59
Power Supply PCB................................................................................................................60
Power Supply Troubleshooting Flow..................................................................................61
Troubleshooting........................................................................................................................64
Error messages & Remedies.................................................................................................64
Trouble Symptoms ................................................................................................................66
Specifications............................................................................................................................68
Exploded Drawings...................................................................................................................74

&'. 7450
1
SAFETY
This Manual is to help qualified service technicians repair or adjust your &'. 7450
printer.
Please read the manual carefully before repairing and making adjustments to your
printer.
The warranty will not cover any trouble with or damage to the printer resulting from
repair or modification by unqualified persons.
WARNING: Be sure to turn off the printer and disconnect the power
cord from the AC outlet before removing the top
enclosure. Failure to disconnect the power could result
in an electric shock.

&'. 7450
2
Do not put your finger on the tractor
gear, when using the rear tractor.
Do not touch the print head immediately
after printing because it is too hot.
Do not put your finger under the tractor
cover while loading fanfold paper.
Place the printer on a rigid,
horizontal base in a location that is
free of vibration.
Before connecting or disconnecting
the interface cable, be sure to turn
off the printer.
Do not connect the printer to a non-
standard power source.
Unpack the printer. Make sure that the
printer body and all accessories are
included in the package and no parts are
damaged.
Do not use the printer in a location
exposed to direct sunlight or close to a
heater or other heat generating
equipment.
Do not use the printer in a dusty location
or any location subject to sudden
changes in temperature and humidity.
Rear Operating Clearance

Fanfold Paper: 2” plus Paper Length
Manual Cut Sheets: Paper Length
Minus 9”
If the case or cover becomes dirty,
clean it with a soft cloth moistened
with a small quantity of neutral
detergent diluted with water. Never
use a hard cloth or volatile solvent
such as alcohol, thinner, or benzene.
Take care not to twist the ribbon while
installing the ribbon cassette.
Never try to print without a ribbon
cassette installed and paper loaded.
Push the lock levers of both tractors to
the LOCK positions firmly when loading
fanfold paper.
Do not turn off the printer during
printing, as this may lead to a
malfunction.
Operational safety
CAUTION
Cautions in setting up
CAUTION

&'. 7450
3
CONTROL PANEL
The liquid crystal display (LCD) on the control panel displays the current printer status,
user messages and menu functions.
Control Panel Key Functions
Basic Printer Functions
ONLINE
This key is used to enable printing (ONLINE light ON) or disable printing
(ONLINE light OFF).
EJECT/LOAD
Pressing this key loads paper to TOF and returns (Ejects) paper back to the
load/parked position when pressed a second time.
SPEED
Pressing this key displays the currently selected printing quality on the LCD.
Each press of the key displays and advances the print quality.
TEAR OFF
Pressing this key, automatically advance pin feed paper perforation to the
paper cutter position.

&'.7450
4
Calibration/Default Reset
HIGH IMPACT
Pressing this key temporarily changes the print impact for multipart forms
from NORMAL to DARK print mode. The HIGH IMPACT LED light is ON
when DARK print mode is selected.
LF
Pressing this key feeds the line in the forward direction at a pitch of 1/6 inch
regardless of the LF PITCH setting in the printer’s control panel menu.
Holding this key down produces continuous forward line feeding.
ENTER
Pressing this key selects the setting displayed on the LCD.
RLF
Pressing this key feeds paper in the reverse direction at a pitch of 1/6 inch
regardless of the LF PITCH setting in the printer’s control panel menu.
Holding this key down produces continuous reverse line feeding.
ALT + JAM
REMOVAL
Pressing this key combination allows paper to be easily removed. Use this
special mode if the EJECT key does not discharge the paper.
ALT + DARK
FORM
Pressing this key combination causes the printer to load manual feed forms
regardless of their color. Use this special mode if printing starts at the wrong
place due to non-reflective (dark) areas on a form.
ALT + RESET
Pressing this key combination evokes a power on reset and clears print
buffer. The LCD displays “INITIALIZING” for a few seconds then returns to
ready mode.
ALT + FF
Pressing this key combination advances paper one form distance.
ALT + MENU
Pressing this key combination opens the printer’s control panel menu system.
Refer to the USER MANUAL for features and selection procedure.
ALT + MICRO
LF
Pressing this key combination micro feeds the line in the forward direction at
a pitch of 1/20 inch intervals.
ALT + MICRO
RLF
Pressing this key combination micro feeds the line in the reverse direction at
a pitch of 1/20 inch intervals.
INITIALIZATION
#1 (No Paper)
Power-up while pressing HIGH IMPACT + LF keys together. LCD will display
INITIALIZING… EEPROM INITIAL 1. User settings are restored.
INITIALIZATION
#2 (Cut-sheet)
Power-up while pressing SPEED + TEAR OFF keys together. LCD will
display INITIALIZING… EEPROM INITIAL 2 / Cut Sheet. Sensor threshold
settings are set.
INITIALIZATION
#2 (Tractor)
Power-up while pressing ONLINE + EJECT/LOAD keys together. LCD will
display INITIALIZING… EEPROM INITIAL 2 / Tractor. Tractor sensor
threshold setting is set.
INITIALIZATION
#3 (Cut-sheet)
Power-up while pressing ALT + SPEED + TEAR OFF keys together. LCD
will display INITIALIZING… EEPROM INITIAL 3 / Cut Sheet. Factory default
settings (i.e. print position, gap & print registration) are restored. NOTE:
Performing INIT #3 requires all printer alignments to be manually reset.