KDL-40X4500, KDL-46X4500, KDL-55X4500 (serv.man2) - Sony TV Service Manual (repair manual). Page 6

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KDL-40/46/55X4500 (HK)     6
SELF DIAGNOSIS FUNCTION
The units in this manual contain a self-diagnostic function. 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 .
Number of times STANDBY
Monitoring Items
Detection
LED (Red) flashes
(Screen Display)
2 times
POW_ERR1
ACW Board IC2104
79pin:  i_lb_err (AD port) < PW_ERR_LEV (Threshold Value)
and
138pin: i_ac_off_det: HIGH
5 times
T_CON
FBA Board IC5501
1
128Pin: TCON_RDY: Low
or
2
Detected Error of Cayenne Register
6 times
BACKLITE
FBA Board IC5501
78Pin: INV_FAIL: LOW
7 times
PANLTEMP
FBA Board IC5501
IIC_ch2 setting value (BEM data)
8 times
AUD_PROT
ACW Board IC2104
19pin: i_au_prot: Low
9 times
FAN_ERR
FBA Board IC5501
pin154: FAN_ERR: High
13 times
BALANCER
FBA Board IC5501
1
163pin: BALANCER_ERR: LOW
or
2
SPI_ERR_CNT (SetSREG) >= SPI_ERR_LIM (FactSREG)
DISPLAY OF STANDBY LIGHT FLASH COUNT
STOPPING THE STANDBY FLASH
Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY LED for flashing.
2 times
4 times
5 times
LED ON  0.3 sec.
LED OFF 0.3 sec.
LED OFF
2 sec. 
[ FLASH COUNT ]
Note: One flash counts is not self-diagnostic.
STANDBY LED
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