Sony XBR-55X900H Service Manual page 11

2021/04/27 23:25:57 (GMT+09:00)
The units in this manual contain a self-diagnostic function. If an error occurs, the Smart Core Red 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 Smart Core Red 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 Smart Core Red 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 .
For China Models :
Please use FY19 remote (or older) to enter to Service Mode.
Self Diag. Quick Reference (LED blinking)
Smart Core RED LED
blinking count
2x <B/G> Main 12V over voltage [MAIN_POWER]
<B/G> Main 5.0V failure [DC_ALERT]
3x
<B/S/G> Audio amp. protection [AUD_ERR]
<P/LD/B/G> LED driver failure/LED voltage protection [LD_ERR]
4x
<LD/P/B>Error detection of the I2C communication between the Main device and the LD
IC.[BCM_ERR]
<P/T/G/B>
5x
(Also panel power failure is a suspect) [P_ID_ERR]
6x <P/G/B> Backlight failure [BACKLIGHT_ERR]
7x <P/B> Over temperature protection [TEMP_ERR]
8x
SAFETY NOTES
S E L F D I A G N O S T I C F U N C T I O N
NX / NXB / NX2
Panel ID EEPROM I2C No ACK
-
SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING
Blue italic: detect at startup sequence only.
<G>: Power supply board,
<B>: Main board,
<T>: T-con board,
<LD>: LD board
<P>: Panel module,
<S>: Speaker
SERVICE ADJUSTMENT DIAGRAM
11
HANDLING GUIDE
SYS SET