Trouble Shooting
1. No Power
No Power
Check CN4
+12V and +5V
Yes
Change
Power Board
NO
Check D23=1.8V
U3 out=3.3V
Change
Q8,D23,U3,D21
NO
Check Short Of
Main Board
No
Yes
Check
X1=14.318MHz
NO
Change X1 or
U4
Yes
Check U5 Pin
6,7 Clock
NO
Change U5 or
U4
RUN Software
ISP
Change U5
Yes
Check U6
Pin 5,6 Clock
Change U6
NO
Check Bottom
Board
Chapter 4
Содержание X191W
Страница 16: ...MAIN BOARD PCB CONDUCTOR VIEW ...
Страница 17: ......
Страница 18: ......
Страница 19: ......
Страница 20: ......
Страница 21: ... 16 BUTTON BOARD ...
Страница 22: ... 16 16 16 POWER BOARD ...
Страница 23: ......
Страница 24: ......
Страница 31: ... 24 Bottom View Side View ...
Страница 48: ......