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5.1
Amplifier
5.1.1 Power Malfunction
dose UX101(10MHz)
-CHECK the AMP PCB
AIC01,FIC01,WIC01,WIC02
5.1.2 No Output
TROUBLESHOOTING
Front
PCB u-com Vdd
NO
normal?
YES
Front PCB
NO
oscillate?
YES
Front PCB
When the power
NO
on "H" pin no.94
(UIC01)
YES
Amp PCB
AIC01,WIC01,02
PIN NO.4,7,12,15
NO
B+ normal?
YES
Amp
PCB AIC01,PIN
NO.51 normal?
NO
(2.5 5V)
YES
Amp
PCB BIC01,PIN
NO14 normal?
NO
(3.3V)
YES
CHECK the master
clock (12.288MHz)
CHECK the
FIC01
SECTION 5
SMPS
pcb SMIC42 input
voltage
normal?
YES
-CHECK AMP PCS
WIRE CN107
Front PCB
p-sense voltage
normal?
(#82)
YES
Replace u-COM IC
(UIC01)
Check
the SMPS pcb
NO
SMIC02
YES
CHECK AMP PCB
WIRE CN107
CHECK AMP PCB
BIC02 pin#3,6,7
voltage(3.0 5V)
Replace of
BIC02
check the
SMIC01,SMD43
NO
Check the SMPS
SMD44
NO
check the
SMIC01,SMd43
(No.MB517)1-17
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