Self Diagnosis Function - Sony XR-75Z9K Service Manual

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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 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]
<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]
5x
<P/T/G/B>
6x
<P/G/B> Backlight failure [BACKLIGHT_ERR]
7x
<P/B> Over temperature protection [TEMP_ERR]
8x
<B> 4KBE failure (4KBE WDT) [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
Detection Items
Panel ID EEPROM I2C No ACK (Also panel power failure is a suspect) [P_ID_ERR]
11
SYS SET

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