Samsung QRQ60T - Troubleshooting; Function Control Operation Test

4. Troubleshooting
4-1. Function Control Operation Test
<FUNCTION/IR>
LED Status / Function Switch
CN1501 (FUNCTION & IR)
1 IR 2 GND
3 A3.3V_PW 4 SENSOR_SCL_I2C
5 SENSOR_SDA_I2C 6 KEY_INPUT1
7 KEY_INPUT2 8 LED_STB_OUT
9 IR_OUT_1 10 IR_OUT_2
11 GND 12 N.C.
<To CN1501 Main Board>
Place TV in Power Standby 1.
Check 2. LED Status
If 3. LED is OFF
LED 1.7Vdc (pin 9
8
) and VCC for 3.3Vdc (pin
3
)
If missing suspect Function Assy/Cable/Main board.
If 4. LED is ON
Switch Operation activates on screen display 9
[On Screen Selections with Function Control]
If missing:
Key_Input 1 9 (pin
6
) change to 0V with a command.
If wrong voltage or no change:
Switch for stuck or miss-operation. 9
Check 5. IR operation with Standard Remote command changes.
Check 6. SDA, SCL
If missing suspect Function Assy/Cable Assy./Main Assy -
4-1
4. Troubleshooting