Akai LEA-19V07P, Service Manual

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Check E3 for 12V output ?
Y
N
1
、
Power Supply Trouble
F1 damage or power supply Check E9 for 5V output
Y
N
L13/10 μ H is
damaged or false
Check if U1,U2 for 3.3V
and U3 for 2.5V output?
N
Y
g
welding
Check the circuit
Check U4 for 1 2V
Y
N
It’s normal but
of U1,U2 ,U3
Check U4 for 1.2V
output
Y N
It’s normal but the
voltage is high
It s normal but
the voltage is
Low
Check if pin
N 4 f U7/
U4/ AIC2857GR8TR damage
L2/10 μ H is damaged or
false welding
No.4 for U7/
RT8269GSP is
false welding
or U7 is
damaged
E9 is
damaged or
the loader is
in short
circuit
It
’
s
normal
but
the voltage is
high
It’s normal but
the voltage is
Low
Ch k if i N 4 f U4/ E6 i d d th Check if pin No.4 for U4/
AIC2857GR8TR is false welding
or U4 is damaged
E6 is damaged or the
loader is in short
circuit
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