Troubleshooting; Function - Samsung Frame QN43LS03TAF Service Manual

4. Troubleshooting

4-1. Function

„ Function /IR Control Test
1. Place TV in Power Standby
2. Check LED Status (Note: Can be turned off in menu)
3. If LED is OFF
Check LED 1.7Vdc (pin 14 ) and VCC for 5Vdc (pin 4 )
9
→
If missing suspect Function Assy/Cable/Main board.
4. If LED is ON
Check Switch Operation activates on screen display
9
[On Screen Selections with Function Control]
• If missing:
Check KEY_INPUT1
9
• If wrong voltage or no change:
Check Switch for stuck or miss-operation.
9
5. Check IR (pin 10 ) operation with Standard Remote command changes. (5V to 3.3V effective DC)
6. Check SDA (pin 17 ),
→
If missing suspect Function Assy/Cable Assy/Main Assy.
(pin 11 ) change to 0V with a command.
SCL (pin 15 ) for effective 5Vdc (after power on)
To Main Board
LED Status / Function Switch
CN1901 (FUNCTION & IR)
1 D-_USB_BTWIFI_CM
3 D+_USB_BTWIFI_CM
5 GND
7 BT_UART_TX
9 BT_WAKE
11 KEY_INPUT1
13 KEY_INPUT2
15 SENSOR_SCL_I2C
17 SENSOR_SDA_I2C
19 MIC_DATA
<Main Board Connector Function Pins>
4. Troubleshooting
2 WIFI_PHY_ON
4 A3.3V_PW (A5V_PW)
6 WIFI_WOW
8 BTWIFI_NRESET
10 IR
12 MIC_CLK
14 LED_STB_OUT
16 IR_GND
18 IR_OUT_1
20 IR_OUT_2
4-1