Checking order
1, 2. Check IR cable condition between IR & Main board.
3. Check the st-by 3.5V on the terminal 12.
4. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog
Tester needle moves slowly, and defective when it does not move at all.
Standard Repair Process Detail Technical Manual
Normal Remote controller operation checking method
D. Function error_ No response in remote controller
<ALL MODELS>
A27
Established
date
Revised
date
Error
symptom
Content
P4000
1
GND
2
3.4V_WIFI
3
M_RESET
4
USB_DM
5
GND
6
USB_DP
7 SDA
8 KEY1
9 SCL
10 KEY2
11 IR
12 +3.5V_ST
13 LED_R
14 GND
②
③
④
①
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