Samsung UN43TU7000F - Power Troubleshooting

4. Troubleshooting
4-1. Power Troubleshooting
4-1-1. FUNCTION/IR Control Test
<Main Board Connector Function Pins>
CN11_CM (Main Board Pins)
1 WIFI_DM 2 WIFI_PHY_ON
3 WIFI_DP 4
WIFI5V_PW
IR5V_PW
5
WIFI_GND
IR_GND
6 WIFI_WOL
7 UART_TX 8 WIFI_NRESET
9 BT_WAKE 10 IR
11 KEY_INPUT1 12 N.C
13 KEY_INPUT2 14 LED_STB_OUT
15 ECO_SCL_I2C 16
WIFI_GND
IR_GND
17 ECO_SDA_I2C 18 IR_OUT_1
19 N.C 20 IR_OUT_2
Pin 19
Pin 1
Pin 20
Pin 2
Function/Wi-Fi/BT
Connector
LED Status/ Function
Switch
< Main Board Connector Reference Chart>
12 345678910 11 12 12 14 15 16 17 18 19 20
13 579246810 11 13 15 17 19 12 14 16 18 20
< Function/Wi-Fi/BT Connector Pins with Main
Reference Chart>
12 345678910 11 12 12 14 15 16 17 18 19
20
13 579246810 11 13 15 17 19 12 14 16 18 20
Wi-Fi /BT Pins Function Pins
1. Place TV in Power Standby
2. Check LED Status
3. If LED is OFF
9 Check LED 1.7Vdc (pin
14
) and VCC for 5Vdc (pin
4
)
→ If missing suspect Function Assy/Cable/Main board.
4. If LED is ON
9 Check Switch Operation activates on screen display
[On Screen Selections with Function Control]
• If missing:
9 Check KEY_INPUT1 (pin
11
) change to 0V with a command.
• If wrong voltage or no change:
9 Check Switch for stuck or miss-operation.
5. Check IR (pin
10
) operation with Standard Remote command changes. (5V to 3.3V effective DC)
6. Check SDA (pin
17
), SCL (pin
15
) for effective 5Vdc (after power on)
→ If missing suspect Function Assy/Cable Assy/Main Assy.
4-1
4. Troubleshooting