4-2. How to Check Fault Symptom
4-2-1. Power
FUNCTION/IR Control
<Function/IR>
LED Status / Function Switch
CN1601 (FUNCTION/IR)
1
IR_TX_OCM
7
KEY_INPUT2
2
DGND
8
LED_STB_OUT
3
A3.3V_PW
9
A3.3V_PW
4
IRB_SCL_I2C
10
NC
5
IRB_SDA_I2C
11
NC
6
KEY_INPUT1
12
NC
TV in Standby
1.
LED Status
9
If
2. LED
is
OFF
LED 1.7Vdc (pin 8) and VCC for 3.3Vdc (pin 3)
9
If missing suspect
•
Function Assy/Cable Assy/Main Board
.
If
3. LED
is
ON
Switch Operation activates on screen display.
9
[On Screen Selections with Function Control]
If missing:
-
Key _Input1 Pin 6
9
change to 0V with a command.
If wrong voltage or no change:
-
Switch for stuck or miss-operation.
9
Check
4.
IR
operation with Standard Remote command changes. (3.3V to 2.5V effective DC)
SDA
5.
,
SCL
for effective 3.3Vdc (after power on)
If missing suspect
-
Function Assy/Cable Assy/Main Board
.
4-2
4. Troubleshooting
