4. TROUBLE SHOOTING
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Only for training and service purposes
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START
(1) Check TP1
TP1= Switching Signal
(2) Check TP2
TP2 = Switching Signal
Yes
No
Check the R140 Soldering
No
Check the R141 Soldering
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(3) Check core
voltage(TP3)
TP3= 1.2V
Yes
No
Check Soldering Q102, Q103 L102
If soldering is fine, replace them
N
Yes
(5) Check voltage(TP5)
TP5= 2.5V
Yes
No
Check the Q104 Soldering
If soldering is fine, replace Q104
(4) Check voltage(TP4)
TP4= 2.5V
Check the R152 Soldering
No
Yes
(6) Check XTAL_OUT
Signal (TP6)
TP6= 20MHz
No
Check the X400 Soldering
If soldering is fine, replace X400
Yes
(7) Check
SFLASH DATA(TP7)
No
Check the U202 Soldering
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U202
FINISH
SFLASH_DATA(TP7)
TP7= Data pulse
If soldering is fine, replace U202
Yes