Sony KDL-32BX301 Service Manual ▷ View online
Power structure-1
Power structure-2
Troubleshooting-1
No display on screen (screen is black, no power)
No power/ No video
Does power cord plug
in AC outlet?
in AC outlet?
Plug TV power cord
in AC outlet
in AC outlet
Does power cord of TV
set connect to PSU?
set connect to PSU?
No
Yes
Check if power cord plug
in PSU CN6101 tightly
in PSU CN6101 tightly
No
Can turn on TV(Green LED
light) by pressing power key of
remote controller or keypad?
light) by pressing power key of
remote controller or keypad?
No
Check power on PSU & MB (refer to
P.12 check power steps)
P.12 check power steps)
Yes
Yes
Video problem refers to
check video steps
check video steps
Audio problem refers to
check audio steps
check audio steps
Refer to System
Diagram 1
Diagram 1
If failure (Red) LED blink, please
refer to self-diagnostics function
refer to self-diagnostics function
PSU: Power Supply Unit
MB: Main Board
MB: Main Board
Troubleshooting-2
Check power steps
Does PSU have
STBY3.3V output?
STBY3.3V output?
No
Yes
PSU failure
Does PSU have
REG12V output?
REG12V output?
No
Have 5V on MB?
Check MB IC231
Check PSU
CN6401 pin3
CN6401 pin3
Yes
Hi (2V-3.3V)Æ Power ON
Low(0V-0.8V)Æ Power OFF
Low(0V-0.8V)Æ Power OFF
Have 1V on MB?
No
Yes
No
Check MB IC232
Yes
Have +3.3V
SW on MB?
No
Check MB IC267
No
Have +1.25V on MB?
Yes
Check MB IC268
Have +DDRV on MB?
Yes
No
Check MB IC269
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