
FUNCTION/IR Control Test
Main Board Pins
1.
Place TV in Power Standby
2.
Check
LED
Status
3.
If
LED
is
OFF
9
Check
LED
1.7Vdc (pin 14 ) and VCC for 5Vdc (pin 4 )
→
If missing suspect Function Assy/Cable/Main board.
4.
If
LED
is
ON
9
Check Switch Operation activates on screen display
[On Screen Selections with Function Control]
• If missing:
9
Check
KEY_INPUT1
(pin 11 ) change to 0V with a command.
• If wrong voltage or no change:
9
Check Switch for stuck or miss-operation.
5.
Check
IR
(pin 10 ) operation with Standard Remote command changes. (5V to 3.3V effective DC)
6.
Check
SDA
(pin 17 ),
SCL
(pin 15 ) for effective 5Vdc (after power on)
→
If missing suspect Function Assy/Cable Assy/Main Assy.
FUNCTION/IR Pins
1.
Place TV in Power Standby
2.
Check
LED
Status
3.
If
LED
is
OFF
9
Check
LED
1.7Vdc (pin 17 ) and VCC for 5Vdc (pin 7 )
→
If missing suspect Function Assy/Cable/Main board.
4.
If
LED
is
ON
9
Check Switch Operation activates on screen display
[On Screen Selections with Function Control]
• If missing:
9
Check
KEY1
(pin 11 ) change to 0V with a command.
• If wrong voltage or no change:
9
Check Switch for stuck or miss-operation.
5.
Check
IR_RX
(pin 10 ) operation with Standard Remote command changes. (5V to 3.3V effective DC)
6.
Check
I2C_SDA
(pin 14 ),
I2C_SCL
(pin 13 ) for effective 5Vdc (after power on)
→
If missing suspect Function Assy/Cable Assy/Main Assy.
4-2
4. Troubleshooting