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Chapter 4
TROUBLE SHOOTING
This chapter provides trouble shooting information for AL2023W
1. No Power
No Power
Check CN1
+12V and +5V
Yes
Change
Power Board
NO
Check D1=1.8V
U1 out=3.3V
Change
Q3,D1,U1,D2
NO
Check Short Of
Main Board
No
Yes
Check
X1=24MHz
NO
Change X1
Yes
Check U5 Pin
42,43 Clock
NO
Change U5 or
U4
RUN Software
ISP
Change U5
Yes
Check U6
Pin 42,43 Clock
Change U6
NO
Check Bottom
Board
All manuals and user guides at all-guides.com
Summary of Contents for AL2023W
Page 19: ... 19 PCB LAYOUT Main Board All manuals and user guides at all guides com ...
Page 20: ... 20 Button Board All manuals and user guides at all guides com ...
Page 21: ...Power Board All manuals and user guides at all guides com a l l g u i d e s c o m ...
Page 22: ...All manuals and user guides at all guides com ...
Page 23: ...All manuals and user guides at all guides com ...
Page 32: ... 32 Real View Top View All manuals and user guides at all guides com ...
Page 33: ... 33 Side View unit mm All manuals and user guides at all guides com ...
Page 50: ...All manuals and user guides at all guides com ...
Page 52: ...Chap SCHEMATIC DIAGRAM Main Board All manuals and user guides at all guides com ...