4. Troubleshooting
4-1. Function Control Operation
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.
<Standby LED Status> <Function Switch>
<To CN1501 Main Board>
3.3Vdc to 2.5Vdc (Effective DC) r
3.3Vdc (Effective DC) r
1.8dc to 0V with command r
l 3.3Vdc (Effective DC)
l 1.8dc to 0V with command
l 1.7Vdc STBY
FUNCTION/IR Control Test
1. Place TV in Power Standby :
2. Check LED Status.
3. If LED is OFF
9 LED 1.7Vdc (pin
8
) and VCC for 3.3Vdc (pin
3
)
• If OK replace Function Assy.
• If Missing check Main Assy/Function Cable.
4. If LED is ON
9 Switch Operation activates on screen display.
• If missing:
9 Key_Input1 (pin
6
) change to 0V with a command.
• If missing:
9 Switch for stuck or miss-operation.
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.
4-1
4. Troubleshooting
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