Friday, November 13, 2015

SONY KDL-32BX350 - SONY KDL-40BX450 STANDBY LED FLASHING AND SERVICE MODE

SONY KDL-32BX350 - SONY KDL-40BX450 


STANDBY LED FLASHING AND SERVICE MODE 

SELF DIAGNOSIS 
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.
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 .
STANDBY LED FLASHING CODES
STBY LED Flash time
Service menu Item nam (Screen Display)
Diagnostic Item Description
2
MAIN_POWER
Main Power Over Voltage Protection
3

DC_ALERT1
DC_ALERT
AUDIO_PROT
Audio Abnormal Detection
4
BALANCER_ERR
Balancer Error
5

TCON_ERR
Detect TCON_RDY
PANEL_ID__NVM_ERR
Panel ID NVM Error
6
BACKLIGHT_ERR
Back Light Error (Panel Inverter)
7

TEMP_ERR
Therm al Error

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:
HOW TO ENTER TO SELF DIAGNOSTICS 
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below
INFORMATION >DIGIT 5 > VOLUME DOWN  > POWER ON
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-32BX350
REAR COVER SCREW POSITIONS

KDL-40BX450
REAR COVER SCREW POSITIONS

HOW TO ENTERING SERVICE MODE
1) Turn on the main power switch to place this set in standby mode.
2) Press the buttons on the remote commander as follows, and entering service mode
INFORMATION > DIGIT 5 > VOLUME UP > POWER ON

SONY TV REPAIRING TIPS
SONY KV32S40
PROBLEM
A.C Hum
KV32S40 serial 9028282 that has a low level audio hum in the video input or tuner mode. Looked in the FPR on web site but could fine nothing on the subject. The hum is at 60 Hertz.
SOLUTION
The hum is a result of magnetic flux from the vertical deflection yoke. The 60 hz is radiating into the low level audio circuits through inductive pick up from lead dress and ground loops. To minimize these Remove JW086 and JW1007.Add 22AWG wire from JW270 to ground side of R477. This wire should be on the top side of the A-board and routed to following the audio signal lines from IC1401
SONY KV32V25
PROBLEM
VERTICAL
Unit has an arcing inside the flyback transformer. Replaced the transformer the unit has a bright band at the top of the screen. Replaced the jungle "IC without effecting the symptom.
SOLUTION 
Its noticed the +15 volt source was lower than expected. It was only 10 volts. It is not unusual. The voltage is normally 12 volts. What missing is the -15. This voltage must be there in order for the set to have any vertical sweep. D530 was shorted and open R536 the 0.47 ohm current