Troubleshooting; Function Control Operation/Test - Samsung UN55MU7000FXZA Manual

Troubleshooting

Function Control Operation/Test

On Screen Selections with Function Control
FUNCTION/IR Control Test
1. TV in Standby
2. Check LED Status
3. If LED is OFF
 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
 Switch Operation activates on screen display
• If missing:
 Key _Input1 Pin 6 change to 0V with a command.
• If wrong voltage or no change:
 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.
CN910
CN910 (FUNCTION/IR)
IR 3.3Vdc to 2.5Vdc
1
(Effective DC)
3 A3.3V_PW
AMP_SDA_I2C
5
3.3 Vdc (effective DC)
KEY_INPUT2 0V
7
(no operation change)
A3.3V_PW 3.3V to Deco
9
Lamp
Function/IR
LED Status/
Function Switch
2 GND
AMP_SCL_I2C
4
3.3Vdc (effective DC)
KEY_INPUT1
6 1.8dc to 0V with
command
LED_STB_OUT
8
1.7Vdc STBY
LED_CTRL to Deco
10 Lamp
1Vdc (off) 0.5V (On)