KDL-32S3100, KDL-37S3100 - Sony TV Service Manual (repair manual). Page 7

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When safety shutdown occurs, LED display reports the cause by using the Lighting patterns as indicated below. Since there are
various failure items in WAX model. Light blinking is used so that shutdown causes can be judged from the number of blinking times.
The items corresponding to the number of blinking times are indicated as follows

DC_DET

2

• Power Supply voltage error

DC_ALERT 1

3

• Confirm, which the voltage the right voltage doesn’t

appear about D3. 3V,VDDMQO(=2.5V)

• If it is D3. 3V,VDDMQO(=2.5V), confirm about 3.3V

input IC7001 5th Pin and F7000 is not open.

• If it is VD1.8V, confirm about 3.3V input IC7002

5th Pin and F7000 is not open.

• If it is VD1.8V, confirm about 3.3V input IC7000

12th Pin and PS7000 is not open.

DC_ALERT 2

4

DC_ALERT 3

5

• Confirm, the voltage of REG12V is about 12V.
• If no voltage is on REG12V, Confirm R3031, R3034,

R3037 is mounted.

• If no voltage is on REG12V, Confirm REG12V is

short-circuits in GND.

• If REG12V is not short-circuits in GND, change PWB

to new one.

Backlight

6

• Confirm, about D3. 3 input to Q4014/Q4015.
• If 6 times, change backlight-board.

Temperature

7

• Confirm, heat sink and heat sheet adhere to IC4500.
• If set isn’t shutdown, BH-board temp-trouble.

Audio

8

• Confirm, the right voltage appears about D3. 3V,

VDDMQO(=2.5V), VD1_8, D5V.

• If the output voltage is right, confirm whether

X4500 does an oscillation definitely.

• Change IC4500 to new one.

FAN

9

• Trouble-Info from FAN near digital models.

DFE

10

• No communication from Digital Front End.

B_ENGINE

11

• No communication from Trident-bus.

*Each of the above blinking is repeated every 2 seconds

Example : The figure above shows a LED display when SHUTDOWN is caused by an DC. Alert 2. It repeats flashing for a

specified number of times in 0.3 sec/cycle, has a 2 seconds interval of lighting-off, and again repeats flashing for the
same number of times. Please note that a 2 seconds interval of lighting-off is fixed regardless of abnormal state types.

2.0 sec

2.0 sec

0.3 sec

0.3 sec