KE-50XS910 (serv.man2) - Sony TV Service Manual (repair manual). Page 40

 

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∗1 When Power supply unit is not Service JIG FY-0033, even if PD abnormality applies as above, 

all the lighting of LED is SD (shut down) flash 3 times.

∗2 If the unit cannot identify which protection circuit was activated, even if a power-down had been detected, the red LED may flash 15 times.

SD

1 time

Communication failure of the 
panel-drive IC

Immediate shutdown

2 times

Communication failure of the 
module IIC

Immediate shutdown

3 times

Power decrease of the digital 
DC-DC converter

Immediate shutdown

4 times

Panel having high 
temperature

Shutdown 30 seconds 
after warning

PD

with

Power 

Supply 

Unit 

for 

Service 

JIG 

FY-0033

2 times

Panel-POWER SUPPLY

Immediate power-down

3 times

SCAN

Immediate power-down

4 times

SCAN-5V

Immediate power-down

5 times

Y-DRIVE

Immediate power-down

6 times

Y-DCDC

Immediate power-down

7 times

Y-SUS

Immediate power-down

8 times

ADDRESS

Immediate power-down

9 times

X-DRIVE

Immediate power-down

10 times

X-DCDC

Immediate power-down

11 times

X-SUS

Immediate power-down

12 times

DIGITAL-DCDC

Immediate power-down

15 times

UNKNOWN 

∗2

Immediate power-down

RED LED 

D4002

GREEN LED 

D4001

INTERFACE ASSY

Shutdown
• Operation: When the microcomputer detects any abnormality, it forcibly turns off the unit.
• LED indication: The green LED of INTERFACE ASSY flashes.

Power-down
• Operation: When the unit is in emergency status, a protection circuit is activated, and the power is turned off.
• LED indication: The red LED of INTERFACE ASSY flashes.