Self Diagnostic Function - Sony KD-55A8F Service Manual

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 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]
4x <T/B>TCON internal error/TCON I2C communication error[LD_ERR]
<P/T/G/B>
5x (Also panel power failure is a suspect) [P_ID_ERR]
<T/B>Data corruption in EEPROM[P_ID_ERR]
6x <G/B> G board error[BACKLIGHT]
<B/P> Over temperature protection [TEMP_ERR]
7x
<B> Temp. sensor I2C No ACK [TEMP_ERR]
8x <B> 4KBE Error (4KBE WDT)

SELF DIAGNOSTIC FUNCTION

Detection Items
Panel ID EEPROM I2C No ACK
SECTION 2
Blue italic: detect at startup sequence only.
<G>: Power supply board,
<B>: Main board,
<T>: T-con board,
<P>: Panel module,
<S>: Speaker,
<Tu>: Tuner board,
10
SYS SET