Function Control Operation Test - Samsung QA55Q900RBWX Series Service Manual

4-2. Function Control Operation Test

„ FUNCTION/IR Control Test
1. Place TV in Power Standby :
2. Check LED Status. (Note: Can be turned off in menu)
3. If LED is OFF ( & LED should be on with menu setting)
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
• If missing:
Key _Input1(Pin 6) or Key_Input2(Pin 7) change to 0V with a command.
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.
[On Screen Selections with Function Control]
TO CN1501
LED STATUS/SWITCH
4. Troubleshooting
4-3