Troubleshooting; Function Control Operation Test - Samsung UA43RU7100K Service Manual

4. Troubleshooting

4-1. Function Control Operation Test

LED Status / Function Switch
<FUNCTION/IR>
1. Place TV in Power Standby
2. Check LED Status
3. If LED is OFF
LED 1.7Vdc (pin
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
9
• If wrong voltage or no change:
Switch for stuck or miss-operation.
9
5. Check IR operation with Standard Remote command changes.
6. Check SDA, SCL for effective 3.3Vdc. (after power on)
If missing suspect Function Assy/Cable Assy./Main Assy
-
<To CN1601 Main Board>
8 ) and VCC for 3.3Vdc (pin 3 )
(pin 6 ) change to 0V with a command.
CN1601 (FUNCTION & IR)
1 IR
3 A3.3V_PW
5 SENSOR_SDA_I2C
7 -
9 IR_OUT_1
11 GND
4. Troubleshooting
2 GND
4 SENSOR_SCL_I2C
6 KEY_INPUT1
8 LED_STB_OUT
10 IR_OUT_2
12 -
4-1