4. Troubleshooting
4-1. Function Control Operation Test
<FUNCTION/IR>
LED Status / Function Switch
CN1601 (FUNCTION & IR)
1
IR
2
GND
3
A3.3V_PW
4
SENSOR_SCL_I2C
5 SENSOR_SDA_I2C 6
KEY_INPUT1
7
-
8
LED_STB_OUT
9
IR_OUT_1
10
IR_OUT_2
11
GND
12
-
<To
CN1601
Main Board>
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 missing suspect Function Assy/Cable/Main board.
4.
If
LED
is
ON
9
Switch Operation activates on screen display
[On Screen Selections with Function Control]
•
If missing:
9
Key_Input 1
(pin 6 ) change to 0V with a command.
•
If wrong voltage or no change:
9
Switch for stuck or miss-operation.
5.
Check
IR
operation with Standard Remote command changes.
6.
Check
SDA
,
SCL
for effective 3.3Vdc. (after power on)
-
If missing suspect Function Assy/Cable Assy./Main Assy
4-1
4. Troubleshooting