4-2. How to Check Fault Symptom
4-2-1. Power
FUNCTION/IR Control
<Function/IR>
LED Status / Function Switch
CN1601 (FUNCTION/IR)
1 IR_TX_OCM 7 KEY_INPUT2
2 DGND 8 LED_STB_OUT
3 A3.3V_PW 9 A3.3V_PW
4 IRB_SCL_I2C 10 NC
5 IRB_SDA_I2C 11 NC
6 KEY_INPUT1 12 NC
TV in Standby 1.
LED Status 9
If 2. LED is OFF
LED 1.7Vdc (pin 8) and VCC for 3.3Vdc (pin 3) 9
If missing suspect • Function Assy/Cable Assy/Main Board.
If 3. LED is ON
Switch Operation activates on screen display. 9
[On Screen Selections with Function Control]
If missing: -
Key _Input1 Pin 6 9 change to 0V with a command.
If wrong voltage or no change: -
Switch for stuck or miss-operation. 9
Check 4. IR operation with Standard Remote command changes. (3.3V to 2.5V effective DC)
SDA5. , SCL for effective 3.3Vdc (after power on)
If missing suspect - Function Assy/Cable Assy/Main Board.
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