Sony XR-55A75L Service Manual page 12

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SELF DIAGNOSIS FUNCTION
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 .
Self Diag. Quick Reference (LED blinking)
Smart Core RED LED
Error Item
blinking count
2x
MAIN_POWER
DC_ALERT
3x
AUD_ERR
LD_ERR
4x
BCM_ERR
5x
P_ID_ERR
6x
BACKLIGHT_ERR
7x
TEMP_ERR
8x
4KBE_ERR
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, <H>: H-board
Detection items – 55" / 65"/ 77"
'LD_ERR' for T-con internal error
'BCM_ERR' for EVDD_ERR
<B/T/P/G>
Panel ID EEPROM I2C No ACK (Also panel power failure is a suspect)
<B/G/P/LD> Backlight failure
<B/G> Main 12V over voltage
<B/G> Main 5.0V failure
<B/S> Audio amp. protection
<P/T/B/G>TCON internal error/TCON I2C communication
<P/T/G/B>
(Also, panel power failure is a suspect)
<T/B>Data corruption in EEPROM
<B/H/P> Over temperature protection
<B> 4KBE WDT
Detection items – 83"
failure
<P/T/G/B> EVDD failure
Panel ID EEPROM I2C No ACK
<P/G/B> EVDD over voltage
12
SYS SET

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