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4-2-2. SMPS Power On
1
GND
2
7
A13V
8
POWER_On/Off
Power
TV POWER ON SEQUENCE TEST :
1. Power TV On
9 Power_On/Off / POWER_ON
NOTE
• There is an approx 20 second delay from PS-ON to off condition when the TV is powered off, and approx a 2
minute delay when the TV is first plugged into AC Power.
2. If voltage error or no change:
Jog Function Control Test
9
3. If OK replace
Main Board
All
A13V
supplies for approx. 12.7VDC (pins 3 , 5 ,
9
4. If any wrong voltages, remove SMPS connector to Main Board
All
A13V
again for 12.7VDC (pins 3 , 5 ,
9
5. If OK replace
Main Board
6. If still wrong voltage replace SMPS
9 OD_ON/OFF
(Over Voltage Detect) (pin 4 ) 3.3Vdc : Operating Normal
7.
If 0V or changing, an SMPS or Panel error exists. Perform Backlight Test.
9 BLU_PWM / PWM_BLU
dimming level for video.
•
If missing or error : Replace
Main Connector (POWER)
CNM801 (MAIN Connector)
ANA-DIM
3
9
(pin 8 ) .2Vdc (when off) changes to 3.3Vdc (on)
(pin 6 ) Backlight On/Off & Dim Control : 1Vdc – 3.3 Vdc depending on backlight
Main
Board.
CNM801
A13V
4
OD_ON/OFF
A13V
10
GND
,
7
,
9 )
7
5
A13V
11
GND
9 )
4. Troubleshooting
6
BLU_PWM
12
GND
Backlight
4-3
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