Function Control Test - Samsung QN49Q6FNAF Service Manual

4. Troubleshooting

4-1-5. FUNCTION Control Test

<FUNCTION>
1. TV in Standby
2. Check LED Status.
3. If LED is OFF
LED 1.7Vdc (pin 8) and VCC for 3.3Vdc (pin 3)
9
• If missing suspect Function Assy/Cable/Main board.
4. If LED is ON
Switch Operation activates on screen display.
9
[On Screen Selections with Function Control]
• If missing:
Key_Input 1 Pin 6
9
• If wrong voltage or no change:
Switch for stuck or miss-operation.
9
5. Check IR operation with Standard Remote command changes.
(3.3V to 2.5V effective DC)
6. SDA , SCL for effective 3.3Vdc (after power on)
- If missing suspect Function Assy/Cable Assy./Main Assy.
4-14
CN1601_NQ8
LED Status / Function Switch
change to 0V with a command.
CN1601_NQ8 (FUNCTION & IR)
1 IR 2
3 A3.3V_PW 4
5 IRB_SDA_I2C 6
7 KEY_INPUT2 8
9 A3.3V_PW 10
11 N.C 12
GND
IRB_SCL_I2C
KEY_INPUT1
LED_STB_OUT
N.C
N.C