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24
7.4.
No Sound from MIC at any selector
Press Power Button of Unit
or Remote Control to Turn
ON the Unit
Change Mic cable/
Mic if found NG.
-Check Mic and
Mic cable.
NG
Check Supply
Voltage
IC1400/1
(pin9) >9V - OK
OK
No
signal
Yes
1
2
OK
NG
NG
OK
Monitor CN1401 pin 1
(MIC IN) signal. No
Signal when speaking -
> NG
Check if signal at
main pcb C1048 to
IC1001
No
Signal
Check SOC
IC1001
(Pin 84)
Change IC1400/1
if found short to
gnd.
Replace:
IC1400/1
Replace
C1048 on
Main PCB
Change
IC1001.
3
4
Select USB A selector, connect MIC1/
MIC2. Turn ON MIC and speak into MIC.
No Sound comes out from speaker.
End
Check CN1401(pin 2/3)
Mic Det status when MIC
inserted, 3.3V
±
OK
<2.0V - NG
Yes
No
signal
Yes
5
Replace MIC
Jacks
JK1401/
JK1403
6
Содержание SA-MAX3500PU
Страница 11: ...11 5 Location of Controls and Components 5 1 Remote Control Key Button Operation ...
Страница 12: ...12 5 2 Main Unit Key Button Operation SOUND KARAOKE MIC VOL VOL SELECT 2 C I M 1 C I M SOUND K M VOL SELECT ...
Страница 19: ...19 Check Point SMPS PCB Check Point Main PCB 4 5 1 1 2 3 1 7 6 ...
Страница 21: ...21 Check Point Main PCB 6 1 2 ...
Страница 23: ...23 Check Point Main PCB 1 2 4 3 ...
Страница 25: ...25 Check Point MIC pcb Check Point Main PCB 6 2 IC140 IC140 CN140 JK140 JK140 C140 ...
Страница 27: ...27 Check Point Tuner PCB Check Point Main PCB Antenna CN5 IC5 SO 1 2 3 4 5 6 7 ...
Страница 29: ...29 Check Point Tuner PCB Check Point Main PCB Antenna CN5 IC5 SO 1 2 3 4 5 6 7 ...
Страница 31: ...31 Check Point Main PCB 1 3 4 5 6 7 ...
Страница 33: ...33 Check Point Main PCB 1 3 4 5 6 7 ...
Страница 35: ...35 Check Point Main PCB 2 3 1 ...
Страница 46: ...46 ...
Страница 56: ...56 ...
Страница 82: ...82 ...
Страница 104: ...104 MMH1803 ...