TROUBLE SHOOTING
1. No Power
No Power
Check CN7
+12V and +5V
Yes
Change
Power Board
NO
Check U13=1.8V
U12=3.3V
Change
U13,U12
NO
Check Short Of
Main Board
No
Yes
Check
X1=14.318MHz
NO
Change X1 or
U4
Yes
Check U8 Pin
1,2,5,6 Clock
NO
Change U7 or
RUN Software
ISP
Change U7
Yes
Check Key
Board
Yes
Change Key
Board
NO
Chapter
4
Summary of Contents for X241
Page 16: ...PCB CONDUCTOR VIEW Main Board ...
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Page 26: ...Button Board ...
Page 27: ......
Page 28: ... 16 POWER BOARD ...
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Page 30: ......
Page 38: ... 38 Real View Top View ...
Page 39: ... 39 Side View unit mm ...
Page 59: ...EXPLODED VIEW ...