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Model
HT-NT3
Pages
96
Size
7.95 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
ht-nt3.pdf
Date

Sony HT-NT3 Service Manual ▷ View online

HT-NT3
5
SECTION  1
SERVICING  NOTES
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 fl ow) 
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.
ADVANCE  PREPARATION  WHEN  CONFIRMING  OP-
ERATION
All of the units included in the HT-NT3 (SA-NT3/SA-WNT3) are 
required to confi rming operation of SA-NT3. Check in advance 
that you have all of the units.
NOTE  OF  PERFORMING  THE  OPERATION  CHECK  IN  
THE  STATE  THAT  HEAT  SINK  WAS  REMOVED
When performing the operation check in the state that this unit was 
disassembled, it is possible to perform the operation check in the 
state that heat sink was removed. But don’t perform the operation 
check in the long time, and perform the operation check in the 
volume state as low as possible.
NOTE  OF  REPLACING  THE  IC101,  IC102,  IC103, 
 
IC301,  IC302,  IC303,  IC410,  IC3004  AND  IC5010  ON  
THE  MB-1407  BOARD
IC101, IC102, IC103, IC301, IC302, IC303, IC410, IC3004 and 
IC5010 on the MB-1407 board cannot replace with single. When 
these parts are damaged, replace the complete mounted board.
NOTE  OF  REPLACING  THE  IC1501  ON  THE  WS  
CHUKEI  BOARD
IC1501 on the WS CHUKEI board cannot replace with single. 
When this part is damaged, replace the complete mounted board.
NOTE  OF  REPLACING  THE  IC102  AND  IC103  ON  
THE  MB-1407  BOARD
Replacement of IC102 and IC103 on the MB-1407 board used in 
this unit requires a special tool.
“PRTECT (PROTECT)”  APPEARS  ON  THE  DISPLAY  OF  
THE  BAR  SPEAKER
q Press the ÒÄÆ (on/standby) button to turn off the system. After the 
indicator disappears, disconnect the AC power cord (mains lead) 
then check that nothing is blocking the ventilation holes of the 
system.
NOTE  OF  REPLACING  THE  IC6001  ON  THE  AMP  
BOARD  AND  THE  COMPLETE  AMP  BOARD
When IC6001 on the AMP board and the complete AMP board are 
replaced, it is necessary to spread the compound between the AMP 
board and the heat sink.
Spread the compound (THERMAL COMPOUND (G747)) refer-
ring to the fi gure below.
– AMP Board (Component Side) –
IC6001
thermal compound (G747)
CAPACITOR  ELECTRICAL  DISCHARGE  PROCESSING 
When checking the board, for the electric shock prevention, con-
nect the resistors to both ends of respective capacitor (C201 and 
C207) to discharge the capacitor (C201 and C207).
– SWITCHING REGULATOR (3L405W) Board 
(Conductor Side) –
C207
C201
800 
:/2 W
800 
:/2 W
BOND  FIXATION  OF  ELECTRIC  PARTS
When SWITCHING REGULATOR (3L405W) board or AMP 
board is replaced or the following object parts are replaced, it is 
necessary to fi x parts to the boards by using a specifi ed bond with-
out fail.
• Object boards
SWITCHING REGULATOR (3L405W) board
Complete AMP board
• Object parts
Board
Ref. No.
SWITCHING 
REGULATOR 
(3L405W)
C101, C102, C103, C201, C207, C211, 
C402, C408, C461, C465, L101, L102, 
L401, NR101, R208, T201
AMP
C6078, C6079, L6007, L6008
• Use bond
Part No. 
 
Description
7-600-020-70 
ADHESIVE (SC608Z2) 180ML
HT-NT3
6
• Parts position
 
1.  SWITCHING REGULATOR (3L405W) board (page 6)
 
2.  AMP board (page 6)
1.  SWITCHING REGULATOR (3L405W) board
– SWITCHING REGULATOR (3L405W) Board 
(EXCEPT AEP, UK, RU, AUS) (Component Side) –
*The portion which applies bond:
L401
C402
T201
T201
C211
C207
C201
C101
C102
C103
NR101
R208
– SWITCHING REGULATOR (3L405W) Board 
(AEP, UK, RU, AUS) (Component Side) –
*The portion which applies bond:
T201
C211
R208
C207
C101
C201
NR101
L401
C408
C461
L102
C103
C465
C402
T201
L101
C102
2. AMP 
board
– AMP Board (Component Side) –
*The portion which applies bond:
L6007
L6008
C6078
C6079
Ver. 1.1
HT-NT3
7
MODEL  IDENTIFICATION
Distinguish by Part No. on the rear side of a main unit.
– Rear view –
Part No.
Model
Part No.
US, CND
4-558-893-1[]
AEP
4-558-893-3[]
UK
4-558-893-4[]
RU
4-558-893-5[]
E3
4-558-893-6[]
EA
4-558-893-7[]
SP
4-558-893-8[]
AUS
4-558-894-0[]
TW
4-558-894-2[]
AR
4-558-894-5[]
LA9
4-558-894-6[]
SERVICE  POSITION
panel, front (right)
panel, front (left)
REGULATOR, SWITCHING (3L405W)
MOUNTED PWB (left)
IR TXL board
IR TXR board
RC-S730 (WW)
RF MODULATOR
(WS001)
KEY board
CARD WLAN/BT COMBO
OLED CHUKEI board
MOUNTED PWB (right)
AMP board
AUDIO IO board
WS CHUKEI board
MB-1407 board
Ver. 1.2
• Abbreviation
 AR   
Argentina 
model
 AUS  
Australian 
model
  CND   : Canadian model
  E3 
 : 240V AC area in E model
  EA 
 : Saudi Arabia model
  LA9 
 : Latin-American model
  RU 
 : Russian model
  SP 
 : Singapore model
 TW   
Taiwan 
model
HT-NT3
8
 NOTE  OF  REPLACING  THE  COMPLETE  MB-1407 
 
BOARD  OR  CARD  WLAN/BT  COMBO
When the complete MB-1407 board or CARD WLAN/BT COM-
BO are replaced, please execute the below service mode.
Procedure:
[Home menu 
→ Setup → Resetting → Reset to Factory Default 
Settings 
→ All Settings]
Next, go to service menu and execute “[1] Bluetooth Enable” and 
“[3] Write Bluetooth device address to Registry”.
Finally check one touch NFC listening function at normal power 
on.
Note: The operation in this mode must use a remote commander 
and TV monitor.
1.  Connect this unit with TV monitor.
2.  Press the [
?/1
] button to turn the power on.
3.  Press button in order of the [
x
→ [DISPLAY] → [
X
→ [M] on 
the remote commander.
 (Make the interval when each button is pressed within two 
seconds)
4.  Enter the SVC service mode. The OSD menu on TV monitor 
can be operated by remote commander.
5.  Press [
m
] and Enter Diag.
6.  Press [
,
] and Enter Bluetooth Device Test (Screen 1).
7.  Enter [1] Bluetooth Enable, wait until the display show 
“ Status : Bluetooth Enable Successful ” (Screen 2).
8.  Enter [3] Write Bluetooth device address to Registry, wait until 
the display show “Bluetooth Device Address” and “Status : 
Write Successfull” (Screen 3).
9.  Press the [RETURN] button on the remote commander to 
select “Wireless LAN Test”. (Screen 4)
10.  Press the [
] button on the remote commander to select 
“[5] Write P2P address to Registry”.
11.  Press the [
] button on the remote commander, wait until the 
display show “Status: Write Successful!” (Screen 5).
12.  Press the [
m
] button on the remote commander to select 
“[6] P2P Registry Check”.
13.  Press the [
] button on the remote commander to check the 
P2P devise address is the same as shown in Screen 5.
(Displayed chracters/values in the following fi gure are ex-
ample)
14.  Press the [BACK] button on the remote commander and 
select Factory Initialize. (go to Screen 7)
15.  The set will turn off automatically.
 Diag
Category: 
Bluetooth Device Test
 Diag
Category: Bluetooth Device Test
[1] Bluetooth Enable
[2] Bluetooth Disable
[3] Write Bluetooth device address to Registry
[4] Bluetooth Inquiry Test
Status : Bluetooth Enable Successful!
HELP: [UP][DOWN][ENT][RET]
(Screen 1)
(Screen 2)
 NOTE  OF  REPLACING  THE  CARD  WLAN/BT  COMBO
When the CARD WLAN/BT COMBO is exchanged, the MAC 
address has been changed.
Please print and cut out the following explanations, and return it
with the unit that complete the repair.
 
MAC address of this receiver has been changed by 
this repair.
The customer who use the MAC address fi ltering 
function of connected access point equipment please 
set it again.
MAC address is possible to confi rm on the System 
Information screen of this unit.
Please refer to “Settings and Adjustments” ---> 
“System Settings” ---> “System Information” on the 
Instruction Manual for details. 
 
Please check the basic operation for wired LAN, Wireless 
 
LAN and USB after the repair completed.
NOTE  OF  DELETING  THE  PRODUCT  REGISTRATION  
ON  SEN  (INTERNET  MUSIC  SERVICES)
It is needed to delete the product registration on SEN (Internet 
Music Services) by checking the “Device ID” which have 12 digits 
hexadecimal number. The procedure of checking “Device ID” can 
be followed as below:
1.  Press [HOME] button of the remote commander, the message 
“HOME” appears.
2.  Select “Setup” and press [
] button.
3.  Select “System Settings” and press [
] button.
4.  Select “System Information” and press [
] button.
5.  Device ID will shown on the display.
Device ID: XXXX XXXX XXXX (12 digits hexadecimal 
number).
If it is needed to delete the customer’s registration, please contact 
the Service Headquarter with Device ID information.
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