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
for effective 3.3Vdc. (after power on)
If missing suspect Function Assy/Cable Assy./Main Assy
-
4-1
4. Troubleshooting
