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5.1
Amplifier
5.1.1 Power Malfunction
When the power on
CHECK the AMP PCB
AIC01,FIC01,WIC01,WIC02
5.1.2 No Output
SECTION 5
TROUBLESHOOTING
Front pcb
u-com Vdd
NO
normal?
YES
Front pcb dose
UX101(10MHz)
NO
oscillate?
YES
Front pcb
"H" pin
NO
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
NO
normal?(3.3V)
YES
Check the
master clock
(12.288MHz)
Check the FIC01
SMPS pcb
SMIC42 input
NO
voltage normal?
YES
Check amp PCS
wire CN107
Front pcb p-
sense voltage
NO
normal?(#82)
YES
Replace u-COM IC
(UIC01)
Check
the SMPS
pcb SMIC02
NO
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
Check the SMPS
SMD44
check the
SMIC01,SMd43
(No.MB508)1-11
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