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Model
KDL-40NX720 KDL-40NX723 KDL-40NX725 KDL-46NX720 KDL-46NX723 KDL-46NX725 KDL-55NX720 KDL-55NX723 KDL-55NX725 KDL-60NX720 KDL-60NX723 KDL-60NX725
Pages
127
Size
28.44 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / S/N RANGE 3,000,001 - 4,510,000
File
kdl-40nx720-kdl-40nx723-kdl-40nx725-kdl-46nx720-kd.pdf
Date

Sony KDL-40NX720 / KDL-40NX723 / KDL-40NX725 / KDL-46NX720 / KDL-46NX723 / KDL-46NX725 / KDL-55NX720 / KDL-55NX723 / KDL-55NX725 / KDL-60NX720 / KDL-60NX723 / KDL-60NX725 Service Manual ▷ View online

KDL-40/46/55/60NX720,723,725(AEP/UK/RUSS)
17
SELF DIAGNOSIS FUNCTION
DIAGNOSTIC TEST INDICATORS
When an error occurs, the STANDBY LED will flash a set number of times to 
indicate the possible cause of the problem.
If there is more than one error, the LED will identify the first of the problem areas.
Result for all of the following diagnostic items are displayed on screen.
If the screen displays a “0”, no error has occurred .
The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY LED will automatically begin to flash.
The number of times the LED flashes translates to a probable source of the problem.
A definition of the STANDBY LED flash indicators is listed in the instruction manual for the user’s knowledge and reference.
If an error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to reveal past problems and how often these 
problems occur.
0.5
0.5
3
DISPLAY OF STANDBY LED FLASH COUNT
SELF-DIAGNOSTIC SCREEN DISPLAY
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, it is possible to bring up past occurrences of failure for 
confirmation on the screen:
[To Bring Up Screen Test]
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:
5
*
 : Note that this differs from entering the service mode (volume +)
*
DISPLAY
TV POWER
Channel
Volume
STBY LED
Flash time
Service menu Item
name
(Screen Display)
Diagnostic Item Description
2
MAIN_POWE
Main Power Over Voltage Protection
DC_ALERT
DC_ALERT
AUD_PROT
Audio Abnorm al Detection
4
BALANCER
Panel Balancer Error
TCON_ERR
Not us ed
HFR_ERR
HFR Error
P_ID_ERR
Panel ID NVM Error
6
BACKLITE
Back Light Error (Panel Inverter)
7
TMP_ERR
Therm al Error
8
-
Software Error
9
-
Not  us ed
10
EMIT_ERR
Em itter Error
11
-
Not us ed
12
-
Not us ed
3
5
KDL-40/46/55/60NX720,723,725(AEP/UK/RUSS)
18
SELF DIAGNOSIS FUNCTION
[SELF DIAGNOSTIC SAMPLE SCREEN DISPLAY]
SELF CHECK        <1> NEXT PAGE‐>
000 RGB_SEN    ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
002 MAIN_POWE  ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
003 DC_ALERT   ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
003 AUD_PROT   ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
003 DTT_WDT    ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
004 BALANCER   ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
005 HFR_ERR    ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
005 TCON_ERR   ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
005 P_ID_ERR   ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
006 BACKLITE   ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
007 TEMP_ERR   ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
007 FAN_ERR    ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
010 RESERVED   ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
011 RESERVED   ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
12345‐67891‐23456
Error count (00-99)
Error history (Last failure time beforehand)
Error history (Failure time before last)
Error history (The last failure time)
Item name
STBY LED flash time
Total operation time by hour (MAX:65535)
Boot count (MAX:65535)
Panel operation time by hour (MAX:65535)
Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen.
After you have completed the repairs, clear the result display to “0”.
Clearing the Self Check Diagnostic List
1. Error history and Error count :
Press the Channel 8 => Channel 0 .
2. Panel operation time :
Press the Channel 7 => Channel 0 .
Exiting the Self-diagnostic screen
To exit the Self Diagnostic screen, turn off the power to the TV by pressing the POWER button on the remote or the POWER button on the TV.
KDL-40/46/55/60NX720,723,725(AEP/UK/RUSS)
19
SEC 1. DISASSEMBLY
= This section contain (plastic) bracket. Therefore, be careful when (dis)assembling.
Note: When removing the metal rear cover.
* Make sure not to damage the power supply cord (Guidelines in APPENDIX-1.)
* Were gloves to avoid cutting yourself. For the location of the sharp edge, please refer to APPENDIX-2.
KDL-40/46/55/60NX720,723,725(AEP/UK/RUSS)
20
1-1. KDL-40NX720/723/725
1-1-1. STAND BLOCK, HEAD STAND, NECK AND BASE STAND
DISASSEMBLY
HEAD STAND
NECK
BASE STAND
1 Screw (USER SCREW ST) – Inside bag, screw assy
3 Screws (SCREW, +PSW M5X16) – Inside bag, screw assy
2 Screws (USER SCREW ST) – Inside bag, screw assy
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