Sony GTK-XB7 User manual

SERVICE MANUAL
Sony Video & Sound Products Inc.
Published by Sony Techno Create Corporation
SPECIFICATIONS
HOME AUDIO SYSTEM
9-896-261-02
2016B33-1
© 2016.02
US Model
Canadian Model
AEP Model
UK Model
Australian Model
Ver. 1.1 2016.02
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
(The United States model only)
Left/Right Channel:
driven, from 120
RMS power, with no more than
0.7% total harmonic distortion from
Speaker section
Speaker system:
Tweeter + Woofer
T
weeter L/R:
Woofer:
Inputs
AUDIO/PARTY CHAIN IN L/R:
Outputs
AUDIO/PARTY CHAIN OUT L/R:
USB section and supported
audio formats
(USB) port:
Supported bit rate:
MP3 (MPEG1 Audio Layer-3):
Sampling frequencies:
MP3 (MPEG1 Audio Layer-3):
32/44.1/48 kHz
WMA: 44.1 kHz
BLUETOOTH section
Communication system:
BLUETOOTH Standard version 3.0
Output:
BLUETOOTH Standard Power Class 2
Maximum communication range:
Line of sight approx. 10 m (33 feet) 1)
Frequency band:
2.4 GHz band (2.4000 GHz –
Modulation method:
FHSS (Freq Hopping Spread
Spectrum)
Compatible BLUETOOTH profiles2):
A2DP (Advanced Audio Distribution
Profile)
AVRCP (Audio Video Remote Control
Profile)
SPP (Serial Port Profile)
Supported codecs:
SBC (Sub Band Codec)
AAC (Advanced Audio Coding)
LDAC
1) The actual range will vary depending
on factors such as obstacles between
devices, magnetic fields around a
microwave oven, static electricity,
reception sensitivity, antenna’s
performance, operating system, software
application, etc.
2) BLUETOOTH standard profiles indicate the
purpose of BLUETOOTH communication
between devices.
With 3 ohms loads, both channels
30 watts per channel minimum
50 mm (2 in) × 3, cone type
160 mm (6 in) × 2, cone type
Voltage 2 V, impedance 10 kilohms
Voltage 2 V, impedance 600 ohms
Type A, maximum current 2.1 A
10,000 Hz; rated
250 milliwatts to rated output.
32 kbps 320 kbps, VBR
WMA: 32 kbps 192 kbps, VBR
2.4835 GHz)
General
Power requirements:
60 Hz
50/60 Hz
When BLUETOOTH standby mode is
When BLUETOOTH standby mode is
ports on)
Dimensions (W/H/D) (Approx.):
Mass (Approx.):
Quantity of the system:
1 piece
Supplied accessories:
Remote control (1)
R03 (size AAA) batteries (2)
AC power cord (1)
Design and specifications are subject to
change without notice.
North American model: AC 120 V,
Other models: AC 120 V – 240 V,
Power consumption:
Standby power consumption:
60 W
set to off: 0.5 W (eco mode)
set to on: 2.8 W (all wireless network
330 mm × 650 mm × 340 mm (13 in
× 25 in × 13 in)
12 kg (26 lb 16 oz)
GTK-XB7

GTK-XB7
2
SAFETY-RELATED COMPONENT WARNING!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONC-
TIONNEMENT. NE REMPLACER CES COMPOSANTS QUE
PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DON-
NÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
License and Trademark
Notice
sMPEG Layer-3 audio coding
technology and patents licensed
from Fraunhofer IIS and Thomson.
sWindows Media is either a registered
trademark or trademark of Microsoft
Corporation in the United States
and/or other countries.
sThis product is protected by
certain intellectual property rights
of Microsoft Corporation. Use or
distribution of such technology
outside of this product is prohibited
without a license from Microsoft or
an authorized Microsoft subsidiary.
sThe BLUETOOTH® word mark and
logos are registered trademarks
owned by Bluetooth SIG, Inc. and
any use of such marks by Sony
Corporation is under license. Other
trademarks and trade names are
those of their respective owners.
sThe N Mark is a trademark or
registered trademark of NFC Forum,
Inc. in the United States and in other
countries.
sAndroid™ is a trademark of Google
Inc.
sGoogle Play™ is a trademark of
Google Inc.
sLDAC™ and LDAC logo are
trademarks of Sony Corporation.
sApple, the Apple logo, iPad, iPhone,
and iPod touch are trademarks of
Apple Inc., registered in the U.S. and
other countries. iPad Air and iPad
mini are trademarks of Apple Inc.
App Store is a service mark of Apple
Inc.
s“Made for iPod,” “Made for
iPhone,” “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.
sAll other trademarks and registered
trademarks are of their respective
holders. In this manual, TM and ®
marks are not specified.
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples
of a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2 V AC range are suitable. (See
Fig. A)
1.5 kΩ0.15 μF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.

GTK-XB7
3
1. SERVICING NOTES ............................................. 4
2. DISASSEMBLY
2-1. Disassembly Flow........................................................... 5
2-2. Top Cover Block ............................................................. 6
2-3. Fan Unit (M1) ................................................................. 7
2-4. PSU Board ...................................................................... 7
2-5. MAIN Board ................................................................... 8
2-6. USB + KEY Board.......................................................... 9
2-7. BT&NFC Board.............................................................. 9
2-8. CONTROL Board........................................................... 10
2-9. Side Panel (R), Side Panel (L) ........................................ 11
2-10. Main Chassis Block ........................................................ 12
2-11. Bottom Cover + Plate ..................................................... 13
2-12. Front Panel Block ........................................................... 14
2-13. LB Board......................................................................... 15
2-14. LA Board......................................................................... 16
2-15. RGBF Board ................................................................... 17
2-16. RGBE Board ................................................................... 17
2-17. IR Board.......................................................................... 18
2-18. Tweeter (SP5).................................................................. 18
2-19. Tweeter (SP3, SP4) ......................................................... 19
2-20. Woofer (SP1, SP2) .......................................................... 20
3. TEST MODE ............................................................ 21
4. DIAGRAMS
4-1. Block Diagram - OVERALL Section -........................... 23
4-2. Block Diagram - POWER SUPPLY Section -................ 24
4-3. Printed Wiring Board - MAIN Board -........................... 25
4-4. Schematic Diagram - MAIN Board (1/8) -..................... 26
4-5. Schematic Diagram - MAIN Board (2/8) -..................... 27
4-6. Schematic Diagram - MAIN Board (3/8) -..................... 28
TABLE OF CONTENTS
4-7. Schematic Diagram - MAIN Board (4/8) -..................... 29
4-8. Schematic Diagram - MAIN Board (5/8) -..................... 30
4-9. Schematic Diagram - MAIN Board (6/8) -..................... 31
4-10. Schematic Diagram - MAIN Board (7/8) -..................... 32
4-11. Schematic Diagram - MAIN Board (8/8) -..................... 33
4-12. Printed Wiring Board - BT&NFC Board -...................... 34
4-13. Schematic Diagram - BT&NFC Board - ........................ 34
4-14. Printed Wiring Board - USB + KEY Board - ................. 35
4-15. Schematic Diagram - USB + KEY Board - .................... 35
4-16. Printed Wiring Board - IR Board -.................................. 35
4-17. Schematic Diagram - IR Board - .................................... 35
4-18. Printed Wiring Board - CONTROL Board -................... 36
4-19. Schematic Diagram - CONTROL Board -...................... 37
4-20. Printed Wiring Board - LA Board - ................................ 38
4-21. Printed Wiring Board - RGBE Board - ........................... 38
4-22. Schematic Diagram - LA Board - ................................... 39
4-23. Schematic Diagram - RGBE Board -.............................. 39
4-24. Printed Wiring Board - LB Board - ................................ 40
4-25. Printed Wiring Board - RGBF Board - ........................... 40
4-26. Schematic Diagram - LB Board - ................................... 41
4-27. Schematic Diagram - RGBF Board -.............................. 41
4-28. Printed Wiring Board - PSU Board - .............................. 42
4-29. Schematic Diagram - PSU Board - ................................. 43
5. EXPLODED VIEWS
5-1. Side Panel Section .......................................................... 49
5-2. Cabinet Section ............................................................... 50
5-3. Top Cover Section........................................................... 51
5-4. MAIN Board Section ...................................................... 52
5-5. Front Panel Section......................................................... 53
6. ACCESSORIES ....................................................... 54

GTK-XB7
4
SECTION 1
SERVICING NOTES
The SERVICING NOTES contains important information for servicing. Be sure to read this section before repairing the unit.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
REPAIRING THE BOARDS
When each boards installed in this unit are defective, replace the
mounted board.
Individual electrical parts that mounted on the each boards cannot
be replaced.
Printed wiring board and schematic diagram that have been de-
scribed on this service manual are for reference.
MODEL IDENTIFICATION
Distinguish by Part No. and destination code on the rear side of
the main unit.
– Rear view –
US and Canadian models
MODEL NUMBER LABEL
Part No.
Destination code
SONY® Model No. GTK-XB7
AEP, UK and Australian models
Part No.
Destination code
SONY® Model No. GTK-XB7
Destination Part No. Destination
code
US and Canadian models
(UC2) 4-589-657-0[] UC2
AEP, UK and Australian
models (CEL, CEK, AU1) 4-589-658-0[] CEL/CEK/AU1
DESTINATION ABBREVIATIONS
The following abbreviations for model destinations are used in this
service manual.
• Abbreviations
AUS : Australian model
CND : Canadian model
Ver. 1.1

GTK-XB7
5
SECTION 2
DISASSEMBLY
• This set can be disassembled in the order shown below.
2-1. DISASSEMBLY FLOW
SET
2-2. TOP COVER BLOCK
(Page 6)
2-9. SIDE PANEL (R), SIDE PANEL (L)
(Page 11)
2-13. LB BOARD
(Page 15)
2-14. LA BOARD
(Page 16)
2-15. RGBF BOARD
(Page 17)
2-18. TWEETER (SP5)
(Page 18)
2-16. RGBE BOARD
(Page 17)
2-19. TWEETER (SP3, SP4)
(Page 19)
2-17. IR BOARD
(Page 18)
2-20. WOOFER (SP1, SP2)
(Page 20)
2-10. MAIN CHASSIS BLOCK
(Page 12)
2-8. CONTROL BOARD
(Page 10)
2-11. BOTTOM COVER + PLATE
(Page 13)
2-12. FRONT PANEL BLOCK
(Page 14)
2-4. PSU BOARD
(Page 7)
2-3. FAN UNIT (M1)
(Page 7)
2-7. BT&NFC BOARD
(Page 9)
2-5. MAIN BOARD
(Page 8)
2-6. USB + KEY BOARD
(Page 9)
JIG
When disassembling the unit, use the following
jig for speaker removal.
Part No. Description
J-2501-238-A JIG FOR SPEAKER REMOVAL

GTK-XB7
6
Note: Follow the disassembly procedure in the numerical order given.
2-2. TOP COVER BLOCK
0flexible flat cable (FFC (to MAIN))
(XP35)
flexible flat cable
(FFC (to MAIN))
)OH[LEOHIODWFDEOH))&WR0$,1VHWWLQJ
XP35
1two rubber (large circle)
2two rubber (circle)
5two rubber
(small circle)
7two rubber (square)
3two screws
3screw
4three screws
3screw
3two screws
6two screws
8two screws
9Remove the top cover block
in the direction of the arrow.
qa top cover block
front side
The opposite side is
the terminal side.

GTK-XB7
7
2-3. FAN UNIT (M1)
2-4. PSU BOARD
1connector (XP14) 2screw
3fan unit (M1)
2screw
1two screws
hole
boss
boss
boss
boss
hole
hole
ditch
5five screws
6PSU board
3connector (XP1)
4connector
(CN501)
2reinforcement bracket
–Rear view –

GTK-XB7
8
2-5. MAIN BOARD
–Rear view –
9connector
(XP25)
8connector (XP36)
7flexible flat cable
(XP45)
4connector (XP21)
5connector (XP10)
6connector (XP22)
1connector
(XP37)
2connector (XP7)
3connector (XP14)
qa four screws
qd MAIN board
0screw
qs Remove the MAIN board in
the direction of the arrow.
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front side
rear side
MAIN board
XP21 XP22
XP37 XP7 XP14
XP45
XP36
XP10 XP25 flexible flat cable
The opposite side is
the terminal side.

GTK-XB7
9
2-6. USB + KEY BOARD
2-7. BT&NFC BOARD
1three screws
2USB + KEY board
1connector
(XP34)
long
short
BT&NFC board XP34
3flexible flat cable (to MAIN)
flexible flat cable
(to MAIN)
4flexible flat cable (FFC (to BT&NFC))
(XP8)
2Peel off the
adhesive sheet.
5BT board adhesive sheet
6BT&NFC board
claw
top cover block
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Note: Connect the side of short reinforcement plate
to the BT&NFC board.
front side
rear side
top side
The opposite side is
the terminal side.

GTK-XB7
10
2-8. CONTROL BOARD
5flexible flat cable (FFC (to BT&NFC))
(XP16)
1connector
(XP8)
2eight screws
6CONTROL board
3plate
4Remove the CONTROL board block
in the direction of the arrow.
top cover block
front side
rear side
top side
The opposite side is the terminal side.

GTK-XB7
11
2-9. SIDE PANEL (R), SIDE PANEL (L)
2two screws
3four screws
bond
3four screws
3screw
2screw
5side panel (L)
Note: When installing the side panel (L),
remove the used bond and use a new
bond to fix the side panel (L).
5side panel (R)
Note: When installing the side panel (R),
remove the used bond and use a new
bond to fix the side panel (R).
3screw
1two rubber (circle)
2screw
1rubber
(large circle)
bond
1rubber (large circle)
4Remove the side panel (L)
in the direction of the arrow.
4Remove the side panel (R)
in the direction of the arrow.
–Rear view –

GTK-XB7
12
2-10. MAIN CHASSIS BLOCK
–Rear view –
1connector
(XP21)
2connector
(XP10)
3connector
(XP22)
5connector
(XP36)
6connector
(XP25)
4flexible flat cable
(XP45)
7seven screws
8main chassis block
:LUHVHWWLQJ
front side
MAIN board
XP21 XP22
XP10 XP25 flexible flat cable
XP45
XP36 The opposite side is
the terminal side.

GTK-XB7
13
2-11. BOTTOM COVER + PLATE
5four rubber (large circle)
two bosses
6four screws
3two rubber (small circle)
4two screws
1two rubber (square)
2two screws
7Remove the bottom cover + plate
in the direction of the arrow.
bond
+RZWRUHPRYHWKHERWWRPFRYHUSODWH
Note 1: When removing the bottom cover + plate, move the bottom
cover + plate slowly and remove the bond as shown figure.
Note 2: When removing the bottom cover + plate, please remove
carefully so as not to damage the bosses.
8bottom cover + plate
Note 3: When installing the bottom cover + plate,
remove the used bond and use a new
bond to fix the bottom cover + plate.
top side
bottom side

GTK-XB7
14
2-12. FRONT PANEL BLOCK
total nine bosses
cushion
cushion
4 Insert the jig into a space and raise
front panel block.
Note 1: When using a jig, please work
so as not to injure the cushion.
4 Insert the jig into a space and raise
front panel block.
Note 1: When using a jig, please work
so as not to injure the cushion.
5 All bosses are removed while moving
jig in the direction of the arrow, and
front panel block is removed.
5 All bosses are removed while moving
jig in the direction of the arrow, and
front panel block is removed.
front panel block
7tweeter terminal
(narrow side)
7tweeter terminal
(wide side)
1screw
1screw
2four screws
3prop (bottom)
6Remove the front panel block
in the direction of the arrow.
8front panel block
Note 2: When installing the front panel block
remove the used bond and use a new
bond to fix the front panel block.
speaker unit (TW) (SP4)
top side
bottom side

GTK-XB7
15
2-13. LB BOARD
1eight screws
3connector (XP56)
5connector (XP50)
6LB board
4connector (XP37)
2Remove the LB board block
in the direction of the arrow.
front panel block
front side
bottom side

GTK-XB7
16
2-14. LA BOARD
1four screws
4three screws
qa LA board
9Remove two cables from four
grooves of the front panel.
groove
groove
groove
LA board cable
XP38
4three screws
7connector (XP54)
8connector (XP55)
3prop (upper)
2Draw two cables
out from the hole.
0cable
6flexible flat
cable
(XP38)
flexible flat cable
5Remove the LA board block
in the direction of the arrow.
front panel block
front side
top side
front panel
block
two cables
LA board
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:LUHVHWWLQJ
XP54
XP55
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The opposite side is
the terminal side.

GTK-XB7
17
2-15. RGBF BOARD
2-16. RGBE BOARD
1two screws
2mounting plate (bottom right)
mounting plate (bottom right)
hole
boss
hole 3RGBF board
Install the RGBF board
into the slot.
slot
+RZWRLQVWDOOWKH5*%)ERDUG
Make sure that the projection
of the RGBF board is out.
front panel block
front side
bottom side
mounting plate (bottom left)
Install the RGBE board
into the slot.
boss
3RGBE board
1two screws
2mounting plate
(bottom left)
hole
–Rear bottom view –
+RZWRLQVWDOOWKH5*%(ERDUG
Make sure that the projection
of the RGBE board is out.
slot
front panel block
front side
top side

GTK-XB7
18
2-17. IR BOARD
2-18. TWEETER (SP5)
1screw
2IR board
3flannel
front panel block
front side
top side
3tweeter terminal
(narrow side)
3tweeter terminal
(wide side)
1two screws
2speaker plate
4speaker unit (TW) (SP5)
front panel block
front side
bottom side

GTK-XB7
19
2-19. TWEETER (SP3, SP4)
3tweeter terminal
(narrow side)
3tweeter terminal
(wide side)
1two screws
5two screws
2speaker plate
6speaker plate
4speaker unit (TW)
(SP3)
7speaker unit (TW)
(SP4)
front panel block
front side
top side

GTK-XB7
20
2-20. WOOFER (SP1, SP2)
:LUHVHWWLQJ
:LUHVHWWLQJ
3woofer terminal
(narrow side)
4speaker unit (WF)
(SP2)
4speaker unit (WF)
(SP1)
3woofer terminal
(wide side)
3woofer terminal
(narrow side)
3woofer terminal
(wide side)
2Remove the speaker unit (WF)
in the direction of the arrow.
1four screws
1four screws
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terminals position
top side
woofer terminal
(wide side)
woofer terminal
(narrow side)
speaker unit (WF) (SP1)
speaker unit (WF) (SP1)
front side
woofer terminal
(wide side)
woofer terminal
(narrow side)
speaker unit (WF) (SP2)
front side
Note: When installing the speaker unit (WF) (SP1), (SP2), make
sure that there is a position of the speaker terminal to the
position shown in the figure below.
speaker unit (WF) (SP2)