4-2-2. TV POWER ON SEQUENCE
• 55 inches_SMPS Board
CNM801
Main Connector (POWER)
FUSE
CNM801 (Main Connector)
1 GND 2 ANA_DIM 3 A13V_PW 4 OD ON/OFF 5 A13V_PW 6 BLU_PWM
7 A13V_PW 8 Power_On/Off 9 A13V_PW 10 GND 11 GND 12 GND
TV POWER ON SEQUENCE TEST :
1. Power TV On
9 Power_On/Off (pin
8
) .2Vdc (when off) changes to 3.3Vdc (on)
NOTE
• Will stay On for short time when powered off.
2. If voltage error or no change:
9 Jog Function Control Test
3. If OK replace Main Board
9 All A13V supplies for approx. 12.7VDC (pins
3
,
5
,
7
,
9
)
9 See (SMPS label for approx. STBY and On voltage).
4. If any wrong voltages, remove SMPS connector to Main Board
9 All A13V again for 12.7VDC (pins
3
,
5
,
7
,
9
)
5. If OK replace Main Board
6. If still wrong voltage replace SMPS.
9 OD (Over Voltage Detect) 3.3Vdc - Operating Normal.
7. If 0V or changing, an SMPS or Panel error exists. Perform Back light Test.
9 Backlight On/Off 0V- Off to 5Vdc-ON
• If missing/error replace Main Board.
Power
4-3
4. Troubleshooting
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