Brother P-touch QL-710NW User manual

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User manual

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P-touch
SERVICE MANUAL
MODEL: QL-710W/720NW
PREFACE
This publication is a service manual covering the specifications, theory of operation, disassembly/
reassembly procedure, and troubleshooting the Brother QL-710W/720NW. It is intended for service
personnel and other concerned persons to accurately and quickly provide after-sale service for our
QL-710W/720NW.
To perform appropriate maintenance so that the machine is always in best condition for the
customer, the service personnel must adequately understand and apply this manual.
This manual is made up of four chapters and appendices.
CHAPTER I: SPECIFICATIONS
CHAPTER II: THEORY OF OPERATION
CHAPTER III: DISASSEMBLY AND REASSEMBLY
CHAPTER IV: TROUBLESHOOTING AND ERROR MESSAGE
APPENDIX 1: SERVICEMAN SOFTWARE TOOL
© Copyright Brother 2012
All rights reserved.
No part of this publication may be reproduced in any
form or by any means without permission in writing
from the publisher.
Specifications are subject to change without notice.
CONTENTS
CHAPTER I SPECIFICATIONS
1.1 MECHANICAL SPECIFICATIONS.......................................................................................I-1
1.1.1 External Appearance ...........................................................................................................I-1
1.1.2 Control Button and LED .....................................................................................................I-1
1.1.3 Display.................................................................................................................................I-2
1.1.4 Printing Mechanism.............................................................................................................I-2
1.1.5 Thermal Tape.......................................................................................................................I-3
1.1.6 Cutter...................................................................................................................................I-4
1.1.7 PC Interface.........................................................................................................................I-4
1.2 ELECTRONICS SPECIFICATIONS ......................................................................................I-4
1.2.1 Character Generator.............................................................................................................I-4
1.2.2 Power Supply.......................................................................................................................I-4
CHAPTER II THEORY OF OPERATION
2.1 OUTLINE OF MECHANISMS............................................................................................. II-1
2.1.1 Print Mechanism................................................................................................................ II-1
2.1.2 Press Contact and Release Mechanism of Thermal Head................................................. II-2
2.1.3 Tape Feed Mechanism....................................................................................................... II-3
2.1.4 Automatic Tape Full Cutter Mechanism........................................................................... II-4
2.1.5 Cover Open (Cover Lock) Sensor (Push Switch).............................................................. II-5
2.2 OUTLINE OF CONTROL ELECTRONICS......................................................................... II-6
2.2.1 Main PCB ASSY............................................................................................................... II-7
2.2.2 Media Type Detect Switch PCB (Media PCB ASSY)...................................................... II-7
2.2.3 Media Position Detect Sensor PCB (Tape Sensor PCB ASSY)........................................ II-7
2.2.4 Button, LED PCB (SB PCB ASSY).................................................................................. II-8
2.2.5 Cutter Sensor (Cutter Home Position Detect Sensor) ....................................................... II-8
2.2.6 Media Feed Motor (Tape Feed Motor ASSY) .................................................................. II-8
2.2.7 Full Cutter Motor (Cutter Motor ASSY)........................................................................... II-8
2.2.8 Thermal Head.................................................................................................................... II-8
2.2.9 Wi-Fi PCB ASSY.............................................................................................................. II-8
2.3 MAIN PCB............................................................................................................................. II-9
2.3.1 Media Type Detect Sensor Circuit,
Media Position Detect Sensor Circuit and Cover Open Sensor Circuit.......................... II-10
CHAPTER III DISASSEMBLY AND REASSEMBLY
3.1 SAFETY PRECAUTIONS....................................................................................................III-1
3.2 TIGHTNING TORQUE LISTS ............................................................................................III-2
3.3 LUBRICATION POINTS LIST............................................................................................III-3
3.4 DISASSEMBLY PROCEDURE...........................................................................................III-5
[1] Removing the Thermal Tape and the Top Cover ASSY................................................III-5
[2] Removing the Panel Cover.............................................................................................III-8
[3] Disassembling the Upper Cover and the Under Cover ................................................III-11
[4] Removing the PCB WYSAGBUX7-1 05.....................................................................III-14
[5] Removing the Back Cover............................................................................................III-15
[6] Removing the Power Supply ASSY and the Main PCB ASSY...................................III-16
[7] Removing the Sub ASSY Inlet.....................................................................................III-19
[8] Removing the Media PCB ASSY ................................................................................III-20
[9] Removing the Mecha ASSY ........................................................................................III-21
[10] Removing the Cutter Unit ASSY.................................................................................III-22
[11] Disassembling the Mecha ASSY..................................................................................III-23
3.5 REASSEMBLING PROCEDURE......................................................................................III-28
[1] Reassembling the Mecha ASSY...................................................................................III-28
[2] Installing the Cutter Unit ASSY...................................................................................III-34
[3] Reassembling the Panel Cover.....................................................................................III-35
[4] Installing the Mecha ASSY..........................................................................................III-37
[5] Installing the Media PCB ASSY..................................................................................III-39
[6] Reassembling the Sub ASSY Inlet...............................................................................III-40
[7] Installing the Main PCB ASSY and the Power Supply ASSY ....................................III-42
[8] Reassembling the Back Cover......................................................................................III-46
[9] Installing the PCB WYSAGBUX7-1 05......................................................................III-47
[10] Reassembling the Upper Cover and the Under Cover..................................................III-48
[11] Installing the Panel Cover ............................................................................................III-52
[12]
Inst
alling the Top Cover ASSY and the Thermal Tape ...............................................III-54
[13] Demonstration Print and Final Check ..........................................................................III-57
CHAPTER IV TROUBLESHOOTING AND ERROR MESSAGE
4.1 PRECAUTIONS....................................................................................................................IV-1
4.2 AFTER REPAIRING ............................................................................................................IV-1
4.3 STATUS LED CONTROL IN DIFFERENT SITUATIONS AND
MEASURE AGAINST ERRORS.........................................................................................IV-2
4.4 ERROR MESSAGE ..............................................................................................................IV-4
4.5 TROUBLESHOOTING FLOWS..........................................................................................IV-7
[1] Printing is performed with specific dots omitted. ..........................................................IV-7
[2] The tape is not detected correctly...................................................................................IV-8
[3] LED does not turn on. ....................................................................................................IV-9
[4] No printing is performed..............................................................................................IV-10
[5] The USB/Serial/LAN interface malfunction................................................................IV-10
[6] Wi-Fi interface malfunction.........................................................................................IV-11
[7] The tape is not cut.........................................................................................................IV-12
[8] The tape is not feed correctly. ......................................................................................IV-13
APPENDIX 1 SERVICEMAN SOFTWARE TOOL
1.1 Introduction..............................................................................................................................1-1
1.1.1 Software Tools....................................................................................................................1-1
1.1.2 Items Required for the Inspection ......................................................................................1-1
1.2 Role and Operating procedure of the VR Adjustment Tool....................................................1-2
1.2.1 Role of the VR Adjustment Tool........................................................................................1-2
1.2.2 Performing of the Inspection..............................................................................................1-2
1.2.3 Changing the Current COM Port........................................................................................1-6
1.3 Setting and Operating procedure of the Serviceman Software Tool.......................................1-8
1.3.1 Role of the Serviceman Software Tool .............................................................................. 1-8
1.3.2 Operating procedure of the Serviceman Software Tool..................................................... 1-8
1.4 Precautions............................................................................................................................. 1-11
1.4.1 Precautions for inspecting Chinese model ....................................................................... 1-11
1.4.2 Precautions for all models completed inspections............................................................ 1-11
1.4.3 Precautions for Chinese model completed inspections .................................................... 1-11
1.5 Read serial no ........................................................................................................................ 1-12
1.6 Check MAC address.............................................................................................................. 1-17
1.7 Write add media information................................................................................................. 1-18
1.8 Sensor white level check ....................................................................................................... 1-19
1.9 Sensor black level check........................................................................................................ 1-21
1.10 Temperature and WiFi button check ..................................................................................... 1-23
1.11 Media and cover sensors check ............................................................................................. 1-25
1.12 Cut test................................................................................................................................... 1-27
1.13 Adjustment print test(Continuous) ........................................................................................ 1-28
1.14 Start WiFi module.................................................................................................................. 1-30
1.15 Check WiFi MAC address..................................................................................................... 1-31
1.16 Stop WiFi module.................................................................................................................. 1-32
1.17 Write serial no........................................................................................................................ 1-33
I - 1
CHAPTER I SPECIFICATIONS
1.1 MECHANICAL SPECIFICATIONS
1.1.1 External Appearance
(1) Dimensions (W x D x H) 128mm x 236mm x 153mm
(2) Weight Approx. 1.20kg (Machine proper only)
Approx. 2.22kg (In package)
Fig. 1.1-1 External Appearance
1.1.2 Control Button and LED
(1) Number of buttons 4 (ON/OFF, Wi-Fi, Feed, Cut)
(2) Layout See Fig. 1.1-2
Fig. 1.1-2 Layout
153mm 128mm
236mm
Feed button Cut button Wi-Fi LED
Status LED
ON/OFF button
* Four buttons and two LED’s
Wi-Fi button
I - 2
1.1.3 Display
(1) Display type LED
(Wi-Fi LED; green
Status LED; green, orange, red)
1.1.4 Printing Mechanism
(1) Print method Direct thermal printing with thermal head
Printing on thermal paper tape, and printing on
thermal paper and thermal plastic tape (with
fixed head and tape feeding)
(2) Highest printing speed Max. 93 labels/min. (Standard address labels)
(3) Print head
Type Thick film thermal head
720 dots by one row
Resolution 300 dpi
I - 3
1.1.5 Thermal Tape
(1) Tape Roll type (Die cut and free length)
(2) Type and size of die cut tape
(3) Type and size of free length tape
Type of tape
Label size
(W x H)
Roll overall
width
Number of label
sheets
Standard Address 29mm x 90mm 32mm 400 sheets/roll
Large Address 38mm x 90mm 42mm 400 sheets/roll
Small Address 62mm x 29mm 66mm 800 sheets/roll
Shipping 62mm x 100mm 66mm 300 sheets/roll
Multi Purpose 17mm x 54mm 19mm 400 sheets/roll
File Folder 17mm x 87mm 19mm 300 sheets/roll
CD/DVD
OD
ɸ58mm
ID
ɸ16mm
66mm 100 sheets/roll
Square Paper 23mm x 23mm 32mm 1000 sheets/roll
Round Paper 12 OD
ɸ12mm 32mm 1200 sheets/roll
Round Paper 24 OD
ɸ24mm 32mm 1000 sheets/roll
Standard Address
(for supply with machine)
29mm x 90mm 32mm 100 sheets/roll
Postage Print
(only for U.S.A.)
32.9mm x
47.62mm
42mm 200 sheets/roll
Type of tape Roll width
Roll overall
width
Effective length
of roll
Continuous Length Paper 12 12mm 32mm 30.48m
Continuous Length Paper 29 29mm 32mm 30.48m
Continuous Length Paper 38
(only for EU)
38mm 42mm 30.48m
Continuous Length Paper 50
(only for EU)
50mm 54mm 30.48m
Continuous Length Paper 62 62mm 66mm 30.48m
Continuous Length Paper 62
White Removable
62mm 66mm 30.48m
Continuous Length Paper 62
Yellow Removable
62mm 66mm 30.48m
Continuous Length Film-White 29 29mm 32mm 15.24m
Continuous Length Film-White 62 62mm 66mm 15.24m
Continuous Length Film-Yellow 62 62mm 66mm 15.24m
Continuous Length Film-Clear 62 62mm 66mm 15.24m
Continuous Length Paper 62
(for supply with machine)
62mm 66mm 8m
Continuous Length Paper 54
Non-Adhesive
54mm 54mm 30.48m
Continuous Length Paper 62
Postage Print
(only for U.S.A.)
62mm 66mm 34.5m
I - 4
1.1.6 Cutter
(1) Tape cutting Durable automatic cutter
1.1.7 PC Interface
(1) Method
USB Standard Ver.2.0 Full speed
Wireless LAN IEEE 802.11 b/g/n
Serial RS-232C (only for 720NW)
Ethernet 10/100 base-TX (only for 720NW)
(2) Supported OS Windows;
Microsoft Windows XP/Windows Vista/Windows 7
Macintosh;
Mac OS X 10.4.11-10.6
(only with P-touch Editor 5.x)
(3) Printer emulation PT CBP (Brother original)
ESC/P (only for 720NW)
P-touch template (only for 720NW)
(4) Accessories
Editor Dedicated editor is included.
USB IF cable Standard USB cable is included.
1.2 ELECTRONICS SPECIFICATIONS
1.2.1 Character Generator
Note: Character generator feature is provided only for QL-720NW.
(1) Demonstration printing
1) Press the Feed button when the power is OFF.
2) Keep pressing the Feed button and press the ON/OFF button for five seconds.
3) Release the Feed button while pressing the ON/OFF button.
4) Press the Feed button one time in a row while pressing the ON/OFF button.
5) Release the ON/OFF button.
Fig. 1.2-1 Demonstration Printing
1.2.2 Power Supply
Integral switching power supply U.S.A. / Canada: 120V AC 60Hz
Europe, Other regions:
220V to 240V AC 50/60Hz
II - 1
CHAPTER II THEORY OF OPERATION
2.1 OUTLINE OF MECHANISMS
2.1.1 Print Mechanism
Structure of Thermal Head
This machine adopts direct thermal printing system. The thermal head consists of 720
pieces of heating elements arrayed in vertical single row as shown in the Fig.2.1-1.
The dimension of each heating element is vertical length 0.0847 (0.0847mm pitch) x
horizontal width 0.13mm.
Fig. 2.1-1 Heating Elements of Thermal Head
Printing Process
A thermal tape is pressed against the thermal head in the printing process by the
force comes from a nip between the cylindrical rubber platen and the thermal head.
At this timing, voltage is applied selectively to 720 pieces of heating elements arrayed
on the thermal head. By this voltage application, the heating elements generate heat
and the thermal tape develops dots by itself at heat sensing points. After application of
voltage, the thermal tape is fed to the next printing position by the platen (0.0847mm).
This printing cycle is repeated and characters and geometries are printed on the tape.
One time travel distance (0.0847mm) is shorter than the width of a heating element
(0.13mm), so that continuous printing cycle can print characters and geometries on a
tape by developing dots with no gap.
Pitch 0.0847mm
0.13mm
II - 2
2.1.2 Press Contact and Release Mechanism of Thermal Head
The head ASSY is pressed firmly against on the platen ASSY by the force of head
spring L. When open the top cover ASSY, the release gear and release shaft are
turned via link lever and platen release lever and the release shaft presses down the
head ASSY. This movement releases the head ASSY from the platen ASSY. Tape can
be set under this condition.
By closing the top cover ASSY, the head ASSY is automatically pressed against the
platen ASSY.
Fig. 2.1-2 Press Contact and Release Mechanism of Thermal Head
Platen release
lever
Head spring L
Platen ASSY
Release gear
Link lever
Top cover ASSY
Head ASSY
Top cover ASSY
Release shaft
II - 3
2.1.3 Tape Feed Mechanism
When the tape is set, the tape is pressed against the thermal head, which is nipped
between the platen and the thermal head. At this time the tape feed motor ASSY (step
motor) rotates, and its drive power is transmitted to the platen gear and the platen via
the gear train, and consequently the platen can feed the tape.
Fig. 2.1-3 Tape Feed Mechanism
Thermal tape
Thermal head
Platen
Double gear C
Double gear B
Platen gear
Double gear A
Tape feed motor ASSY
II - 4
2.1.4 Automatic Tape Full Cutter Mechanism
The automatic tape full cutter mechanism moves the moving cutter blade up and
down to the direction of the fixed cutter blade to cut the tape on the feeding pass.
The cam is rotated once so that the moving cutter blade moves up and down and cuts
a medium. The cutter motor ASSY rotates from the position where the cutter home
position detect sensor is ON, and the gear of the cam is rotated through the cut worm
gear. When the cam is rotated once, the cutter motor stops and stays again at the
position where the cutter home position detect sensor is ON.
This mechanism provides the reverse driving system in case of the tape jam between
the 2 blades.
When the driving system is reversed, the cutter motor stops and stays again at the
position where the cutter home position detect sensor is ON.
Fig. 2.1-4 Automatic Tape Full Cutter Mechanism
Cutter motor ASSY
Moving cutter blade
Fixed cutter blade
Thermal tape
Cut helical gear
< A view >
Moving cutter
blade
Fixed cutter blade
Cut worm gear
Cutter motor ASSY
A view
Cut worm gear
Cut helical
gear
Cutter home
position detect
sensor
II - 5
2.1.5 Cover Open (Cover Lock) Sensor (Push Switch)
The cover open (cover lock) sensor (push switch) is mounted on the SB PCB ASSY.
Closing the top cover ASSY, the cover sensor arm pushes the cover open (cover lock)
sensor (push switch) and the signal of the top cover ASSY close status is output.
Fig. 2.1-5 Cover Open (Cover Lock) Sensor (Push Switch)
SB PCB ASSY
Cover sensor arm
Cover open
(cover lock) sensor
(push switch)
Top cover ASSY
Cover open (cover lock) sensor
(push switch)
SB PCB ASSY
Top cover ASSY
Cover sensor arm
II - 6
2.2 OUTLINE OF CONTROL ELECTRONICS
Fig. 2.2-1 and Fig. 2.2-2 show the block diagram of the control electronics. The
control electronics consist of the following components.
QL-710W
Fig. 2.2-1 Block Diagram of the Control Electronics (QL-710W)
CN8
CN2
CN1
CN9
CN3
CN10
CN7
CN6
CN5
CN4
CN11
Wi-Fi PCB ASSY
PC
Full cutter motor
SB PCB ASSY
Tape feed motor
Media type detect switch PCB
Media position
detect sensor PCB
Thermal head
USB
Power supply ASSY
Cutter sensor
II - 7
QL-720NW
Fig. 2.2-2 Block Diagram of the Control Electronics (QL-720NW)
2.2.1 Main PCB ASSY
This manages all the components. This PCB consists of CPU, EEPROM and motor
drivers etc.
2.2.2 Media Type Detect Switch PCB (Media PCB ASSY)
The sensor (mechanical SW) that detects media type and size connected to main
PCB ASSY. A semi-fixed resistance (VR) for adjustment of the media position detect
sensor is mounted on it.
2.2.3 Media Position Detect Sensor PCB (Tape Sensor PCB ASSY)
This sensor detects the printing start position for the die cut label, and checks
existence of the zebra pattern media for the free length label, using the reflection type
photo sensor.
CN8
CN2
CN1
CN9
CN3
CN10
CN7
CN6
CN5
CN4
CN13
CN12
CN11
Wi-Fi PCB ASSY
PC
Full cutter motor
SB PCB ASSY
Tape feed motor
Media type detect switch PCB
Media position
detect sensor PCB
Thermal head
USB
Power supply ASSY
Cutter sensor
PC
PC
Ethernet
Serial
II - 8
2.2.4 Button, LED PCB (SB PCB ASSY)
This is the PCB equipped with ON/OFF button, Feed button, Cut button, Wi-Fi button,
cover open sensor, LED lamp (Green/Red) and Green LED.
2.2.5 Cutter Sensor (Cutter Home Position Detect Sensor)
This sensor detects existence of the cutter at its home position (micro switch).
2.2.6 Media Feed Motor (Tape Feed Motor ASSY)
The media feed motor supplies the drive power to feed media. This motor is step
motor with 35 diameter, and drive voltage is 25V.
2.2.7 Full Cutter Motor (Cutter Motor ASSY)
The cutter motor supplies the drive power to cut media. This motor is a DC motor of
which drive voltage is V
H (25V).
2.2.8 Thermal Head
Thermal head is thick film and drive built-in type thermal head, which consists of 720
dots by one row/300dpi. The drive voltage is V
H (25V).
2.2.9 Wi-Fi PCB ASSY
Wi-Fi PCB ASSY that consists of CPU, antenna etc. performs Wi-Fi wireless
transmitting/receiving.
II - 9
2.3 MAIN PCB
Fig. 2.3-1 shows the block diagram of the main PCB. The main PCB consists of the
following components.
(1) CPU (Including ROM and RAM)
(2) EEPROM (16Kbit)
(3) Power supply ON/OFF circuit, Feed button ON/OFF circuit, Cut button ON/OFF
circuit, LED ON/OFF circuit
(4) Head power supply ON/OFF circuit
(5) Full cutter motor driver circuit and Media feed motor driver circuit
(6) Media type detect sensor circuit, Media position detect sensor circuit and Cover
open sensor circuit
(7) Head temperature detect circuit
(8) Cutter home position detect sensor circuit
(9) Reset circuit
(10) USB interface circuit
(11) 256Mbit SDRAM
(12) 128Mbit Flash ROM
(13) Ethernet interface circuit
(14) Serial interface circuit
Fig. 2.3-1 Block Diagram of the Main PCB
INT
INT
INT
USB I/F
EEPROM
16Kbit
CPU
LPL1830
(NXP)
Media type detect
circuit
5 selector switches
Media position detect
sensor circuit
Photo sensor
Cover open sensor
circuit
Cutter home position
detect sensor circuit
ON/OFF button
Feed, Cut, Wi-Fi button
LED (Green, Red),
Green LED
AC power supply
Switching
power supply
+3.3V power
supply circuit
+25V output
(for drive power
supply)
+25V output
+8V output
+3.3V output
(for logic power
supply)
Oscillator circuit
12MHz
256Mbit SDRAM
128Mbit Flash ROM
DC motor drive circuit
Normal/reverse
drive circuit
DC motor for
full cut
Thermal head
Thermal head
temperature
detect circuit
+25V power supply
voltage detect
circuit
Step motor
Bipolar constant
current drive circuit
Step motor for
media feed drive
Ethernet I/F
Serial I/F
II - 10
2.3.1 Media Type Detect Sensor Circuit, Media Position Detect Sensor Circuit and
Cover Open Sensor Circuit
(1) Media type detect sensor circuit
The sensor circuit consists of media sensor with five switch systems (CAS1
through CAS5). Loading a tape cassette, some of five switches turn on and the
others retain off according to the configuration of its' ID code apertures. Clogged
ID apertures turn on the corresponding sensor switches.
As shown Table 2.3-1, the CPU identifies media type and size from the status of
each sensor switch.
<Table 2.3-1>
Media type SW1 SW2 SW3 SW4 SW5
No media (not loaded) 00000
Standard Address 10000
Large Address 01000
Small Address 11000
Shipping 00100
Multi purpose 10100
File Folder 01100
CD/DVD 11100
Square Paper 00110
Round Paper 12 10001
Round Paper 24 01001
Postage Print
(only for U.S.A.)
01110
Continuous Length Paper 12 01011
Continuous Length Paper 29 00101
Continuous Length Paper 38
(only for EU)
11001
Continuous Length Paper 50
(only for EU)
11011
Continuous Length Paper 62
10101Continuous Length Paper 62 White Removable
Continuous Length Paper 62 Yellow Removable
Continuous Length Film White 29 01101
Continuous Length Film White 62 11101
Continuous Length Film Yellow 62 00011
Continuous Length Film Clear 62 10011
Continuous Length Paper 54 Non-Adhesive 00111
Continuous Length Paper 62 Postage Print
(only for U.S.A.)
11010
Not to be used 11111
<Layout of Sensors (overhead view)>
Identifies from the status of five
switches mounted on the
machine.
0: Sensor OFF
1: Sensor ON
5 4
3
2
1
III - 1
CHAPTER III DISASSEMBLY AND REASSEMBLY
3.1 SAFETY PRECAUTIONS
(1) The disassembly or reassembly work should be carried on a grounded antistatic
sheet. Otherwise, the LSIs and electronic parts may be damaged due to the electricity
charged in your body.
(2) When transporting PCBs, be sure to wrap them in conductive sheets such as
aluminum foil.
(3) When using soldering irons and other heat-generating tools, take care not to
damage the resin parts such as wires, PCBs, and covers.
(4) Be careful not to lose small parts such as screws, washers, or other parts
removed for parts replacement.
(5) Tighten screws according to the tightening torque lists.
(6) Lubricate according to the lubrication points list.
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