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NO POWER
(POWER INDICATOR OFF)
Check J403 Voltage
Pin5, Pin6 (5V)?
U301 Pin2 Voltage
(3.3V) ?
Check Key Control
Connector Routine
Is U201
Pin75 (3.3V)
Voltage ?
Check U201 Pin 96
1
Check U201
Waveforms
1
U201-#96
TROUBLESHOOTING GUIDE
1. NO POWER
YES
Check
YES
YES
Pulse
YES
NO
NO
NO
NO
- 18 -
Check Power Board,
And Find Out a Short Point
as Opening
Each Power Line
Check 3.3V Line
(Open Check)
No Problem
Check 3.3V Line
Check X-TAL
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