Samsung UN49KS800DF Service Manual page 43

FUNCTION/IR Control
„
1 IR 3.3Vdc to 2.5Vdc (Effective DC)
3
5 AMP_SDA_I2C 3.3 Vdc (effective DC)
7 KEY_INPUT2 0V (no operation change)
9 A3.3V_PW 3.3V to Deco Lamp
<DECO Lamp>
1. TV in Standby
√ LED Status
2. LED is OFF
If
√ LED 1.7Vdc (pin 8) and VCC for 3.3Vdc (pin 3)
• If missing suspect
3. If LED is ON
√ Switch Operation activates on screen display.
<On Screen Selections with Function Control>
If missing:
-
√ Key _Input1 Pin 6
If wrong voltage or no change:
-
√ Switch for stuck or miss-operation.
4. Check IR operation with Standard Remote command changes. (3.3V to 2.5V effective DC)
5. SDA , SCL for effective 3.3Vdc (after power on)
If missing suspect
-
CN910 (FUNCTION/IR)
A3.3V_PW
Function Assy/Cable Assy/Main Assy.
change to 0V with a command.
Function Assy/Cable Assy/Main Assy.
2
4 AMP_SCL_I2C 3.3Vdc (effective DC)
6 KEY_INPUT1 1.8dc to 0V with command
8 LED_STB_OUT 1.7Vdc STBY
10 LED_CTRL to Deco Lamp 1Vdc (off) 0.5V (On)
<Function/IR>
4. Troubleshooting
GND
CN910
LED Status / Function Switch
4-3