Read Sharp GX-BT3 (serv.man4) Service Manual online
GX-BT7
– 1
iPad, iPhone, iPod, iPod classic, iPod nano, and iPod touch are
trademarks of Apple Inc., registered in the U.S. and other
countries. Lightning is a trademark of Apple Inc.
trademarks of Apple Inc., registered in the U.S. and other
countries. Lightning is a trademark of Apple Inc.
“Made for iPod,” “Made for iPhone,” and “Made for iPad” mean
that an electronic accessory has been designed to connect
specifically to iPod, iPhone, or iPad, respectively, and has been
certified by the developer to meet Apple performance standards.
Apple is not responsible for the operation of this device or its
compliance with safety and regulatory standards. Please note
that the use of this accessory with iPod, iPhone, or iPad may
affect wireless performance.
that an electronic accessory has been designed to connect
specifically to iPod, iPhone, or iPad, respectively, and has been
certified by the developer to meet Apple performance standards.
Apple is not responsible for the operation of this device or its
compliance with safety and regulatory standards. Please note
that the use of this accessory with iPod, iPhone, or iPad may
affect wireless performance.
The Bluetooth
®
word mark and logos are registered trademarks owned by Bluetooth SIG, Inc.
and any use of such marks by SHARP is under license. Other trademarks and trade names
are those of their respective owners.
are those of their respective owners.
The N Mark is a trademark or registered trademark of NFC Forum, Inc. in the United States and
in other countries.
in other countries.
Android is a trademark of Google Inc.
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
after sales service only.
The contents are subject to change without notice.
MUTE
ON/
STAND-BY
TREBLE
AUDIO IN
BASS
PAIRING
VOL
E SOUND
USB
BLUETOOTH
DIMMER
RRMCGA342AWSA
ECO MODE
PRECAUTIONS FOR USING LEAD-FREE SOLDER
CHAPTER 1. GENERAL DESCRIPTION
[1] AC
[1] AC
Power Supply Cord................................ 1-1
[2] Specifications .............................................. 1-2
[3] Controls and indicators................................ 1-3
[3] Controls and indicators................................ 1-3
CHAPTER 2. ADJUSTMENTS
[1] Version Check ............................................. 2-1
[2] NFC Tag Writing Procedure ........................ 2-1
[1] Version Check ............................................. 2-1
[2] NFC Tag Writing Procedure ........................ 2-1
CHAPTER 3. MECHANISM DESCRIPTION
[1] Disassembly ................................................ 3-1
[1] Disassembly ................................................ 3-1
CHAPTER 4. MAJOR PART DRAWING
[1] Function Table of IC..................................... 4-1
[1] Function Table of IC..................................... 4-1
CHAPTER 5. CIRCUIT DESCRIPTION
[1] IC
[1] IC
Voltage .................................................... 5-1
CHAPTER 6. DIAGRAM
[1] Main/Amplifier Block Diagram ..................... 6-1
[2] Voltage And Current Block Diagram ............ 6-2
[1] Main/Amplifier Block Diagram ..................... 6-1
[2] Voltage And Current Block Diagram ............ 6-2
CHAPTER 7. CIRCUIT SCHEMATICS AND PARTS
LAYOUT
[1] Notes On Schematic Diagram ..................... 7-1
[2] Types Of Transistor And LED ...................... 7-1
[3] Schematic
LAYOUT
[1] Notes On Schematic Diagram ..................... 7-1
[2] Types Of Transistor And LED ...................... 7-1
[3] Schematic
Diagram ..................................... 7-2
[4] Chart Of Connecting Wires ......................... 7-4
[5] Wiring Side Of PWB .................................... 7-5
[5] Wiring Side Of PWB .................................... 7-5
PARTS GUIDE
SERVICE MANUAL
No. S5309GXBT7
CONTENTS
WIRELESS BLUETOOTH
®
SPEAKER SYSTEM
MODEL
GX-BT7
SHARP CORPORATION
Parts marked with “
” are important for maintaining the safety of the set. Be sure to replace these parts with
specified ones for maintaining the safety and performance of the set.
!
• In the interests of user-safety (Required by safety regulations in
some countries) the set should be restored to its original condition
and only parts identical to those specified be used.
and only parts identical to those specified be used.
GX-BT7
– 2
1. Employing lead-free solder
Example:
Indicates lead-free solder of tin, silver and copper.
2. Using lead-free wire solder
3. Soldering
When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.
Be careful when replacing parts with polarity indication on the PWB silk.
Be careful when replacing parts with polarity indication on the PWB silk.
Lead-free wire solder for servicing
When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with
conventional lead wire solder may cause damage or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40 C, we
recommend you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder
or soldering bit, contact our service station or service branch in your area.
conventional lead wire solder may cause damage or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40 C, we
recommend you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder
or soldering bit, contact our service station or service branch in your area.
As the melting point of lead-free solder (Sn-Ag-Cu) is about 220 C which is higher than the conventional lead
solder by 40 C, and as it has poor solder wet ability, you may be apt to keep the soldering bit in contact with the
PWB for extended period of time. However, since the land may be peeled off or the maximum heat-resistance
temperature of parts may be exceeded, remove the bit from the PWB as soon as you confirm the steady
soldering condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corrected. Make sure to turn on
and off the power of the bit as required.
If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit
after every use of it.
solder by 40 C, and as it has poor solder wet ability, you may be apt to keep the soldering bit in contact with the
PWB for extended period of time. However, since the land may be peeled off or the maximum heat-resistance
temperature of parts may be exceeded, remove the bit from the PWB as soon as you confirm the steady
soldering condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corrected. Make sure to turn on
and off the power of the bit as required.
If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit
after every use of it.
“MAIN, KEY, LED DRIVER, REMOTE SENSOR, SWITCH, SMPS, NFC Tag PWB” of this model employs lead-free
solder.
The LF symbol indicates lead-free solder, and is attached on the PWB and service manuals. The alphabetical
character following LF shows the type of lead-free solder.
solder.
The LF symbol indicates lead-free solder, and is attached on the PWB and service manuals. The alphabetical
character following LF shows the type of lead-free solder.
PRECAUTIONS FOR USING LEAD-FREE SOLDER
Ref No.
Description
Parts No.
PWB-A 92LPWB8945
MANS
MAIN (A1) / KEY (A2) / LED DRIVER (A3) / REMOTE SENSOR (A4) / SWITCH (A5)
PWB-B RUiTZA1
-
15AWZZ SMPS
GCASP8945AW01
NFC Tag
NOTE: Please refer to Parts Guide for PWB Service Category
i
GX-BT7
– 3
CHAPTER 1. GENERAL DESCRIPTION
[1] AC Power Supply Cord
QACCEA014AW002
1 – 1
GX-BT7
– 4
[2] Specifications
General
Amplifier
Speaker
USB (MP3 / WMA)
Type
2-way type speaker system
Front Speakers:
5 cm (2”) - 3
Front Speakers:
5 cm (2”) - 3
Ω - Full Range
Subwoofer: 8 cm (3 - 1/8”) - 6
Ω
- woofer
Maximum input
power
power
Front Speakers: 10 W/Channel
Subwoofer: 10 W/Channel
Subwoofer: 10 W/Channel
Rated input
power
power
Front Speakers: 5 W/Channel
Subwoofer: 5 W/Channel
Subwoofer: 5 W/Channel
Power source
AC 100 - 240 V ~ 50/60 Hz
Power
consumption
consumption
AC: Power on: 21 W
Power stand-by: 0.4 W (*)
Dimensions
Width: 446 mm (17 - 9/16”)
Height: 155 mm (6 - 1/8”)
Depth: 154 mm (6 - 1/16”)
Height: 155 mm (6 - 1/8”)
Depth: 154 mm (6 - 1/16”)
Weight
2.5 kg (5.5 lbs.)
Frequency band
2.400 GHz - 2.480 GHz
Compatible
Bluetooth
Bluetooth
A2DP (Advanced Audio Distribution
Bluetooth
2.1 +EDR
Output power
Input terminals
Audio In (audio signal):
500 mV/47 k ohms
500 mV/47 k ohms
USB host
interface
interface
Complies with USB 1.1 (Full
Speed)/2.0 Mass Storage Class.
Support Bulk only and CBI
protocol.
MPEG 1 Layer 3
WMA (Non DRM)
Bitrate support
Support file
MP3 (32 ~ 320 kbps)
WMA (64 ~ 160 kbps)
Other
Maximum total number of MP3/
Maximum total number of folders
is 999 INCLUSIVE of root
directory.
directory.
File system
support
support
Support USB devices with
Microsoft Windows/DOS/FAT
12/FAT 16/FAT 32.
2 kbyte block length for sector.
Profile
Profile), AVRCP (Audio/Video
Remote Control Profile)
WMA files is 65025.
Front speaker:
MPO: 10 W (5 W + 5 W)
RMS: 10 W (5 W + 5 W)
(10% T.H.D.)
RMS: 7 W (3.5 W + 3.5 W)
(1% T.H.D.)
Subwoofer:
MPO: 14 W
RMS: 10 W (10% T.H.D.)
RMS: 8 W (1% T.H.D.)
MPO: 10 W (5 W + 5 W)
RMS: 10 W (5 W + 5 W)
(10% T.H.D.)
RMS: 7 W (3.5 W + 3.5 W)
(1% T.H.D.)
Subwoofer:
MPO: 14 W
RMS: 10 W (10% T.H.D.)
RMS: 8 W (1% T.H.D.)
( * ) This power consumption value is obtained when
the Bluetooth stand-by mode is cancelled in the
power stand-by mode.
the Bluetooth stand-by mode is cancelled in the
power stand-by mode.
As part of our policy of continuous
improvement, SHARP reserves the right to
make design and specification changes for
product improvement without prior notice.
The performance specification figures
indicated are nominal values of production
units. There may be some deviations from
these values in individual units.
improvement, SHARP reserves the right to
make design and specification changes for
product improvement without prior notice.
The performance specification figures
indicated are nominal values of production
units. There may be some deviations from
these values in individual units.
1 – 2
