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4. Troubleshooting
4-1. Function Control Operation
<Standby LED Status>
3.3Vdc to 2.5Vdc (Effective DC) r
3.3Vdc (Effective DC) r
1.8dc to 0V with command r
„ FUNCTION/IR Control Test
1. Place TV in Power Standby :
2. Check
LED
Status.
3. If LED is OFF
LED 1.7Vdc (pin 8 ) and VCC for 3.3Vdc (pin 3 )
9
•
If OK replace Function Assy.
•
If Missing check Main Assy/Function Cable.
4. If LED is ON
Switch Operation activates on screen display.
9
•
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.
CN1501 (FUNCTION & IR)
1
IR
3
A3.3V_PW
5
SENSOR_SDA_I2C
7
KEY_INPUT2
9
IR_OUT_1
11
GND
2
GND
4
SENSOR_SCL_I2C
6
KEY_INPUT1
8
LED_STB_OUT
10
IR_OUT_2
12
N.C.
4. Troubleshooting
<To CN1501 Main Board>
<Function Switch>
l 3.3Vdc (Effective DC)
l 1.8dc to 0V with command
l 1.7Vdc STBY
4-1
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