Read Panasonic RR-US571PP / RR-US571E / RR-US571EE Service Manual online
16
7.2.
Speaker output circuit confirmation
7.3.
Earphone output circuit confirmation
Start
CL115 and CL116
Is there an output signal? (*2)
QR304 collector
2.8V
The speaker NG.
YES
QR304 or QR305 NG.
NO
NO
Digital amplifier standby release
YES
Between IC301(PIN15) & R325
Between IC301(PIN16) & R323
Between IC301(PIN16) & R323
Is there an output signal? (*3)
IC304 or C313 or C314 NG.
YES
Power-supply voltage
OK?
NO
NO
YES
IC301 or IC1101 is NG.
(or R323 or R325 NG)
Refer to the voltage table.
MP3 file play
(*3) GND shape confirmation
(*2) CL115,CL116 Please confirm the wave shape at both terminal
Note : The shape of waves is a digital amp output.
Note : The shape of waves is a digital amp output.
The low pass filter is necessary for the measurement.
Power-supply voltage
OK?
NO
YES
Refer to the voltage table.
Start
CL113,CL114
Is there an output signal?
(*4)
Inner phone or JK301 NG.
YES
NO
Between R307/LB316
and R308/LB317
Is there an output signal?
(*5)
LB316 or LB317 or LB315 NG.
YES
NO
(*4)
CL113:Rch
CL113:Rch
䡠CL114:Lch
7KHGXPP\UHVLVWDQFHȍLVSXWEHWZHHQ&/&/DQG
&/&/
The shape of waves at both ends of resistance is confirmed.
&/&/
The shape of waves at both ends of resistance is confirmed.
IC301 or IC1101 is NG.
(or R307 or R308 or
&RU&1*
(*6) When the sound is sounded from the speaker though the inner
phone is used, LB318 or QR301 is NG
phone is used, LB318 or QR301 is NG
MP3 file play
Wavy confirmation
Click on the first or last page to see other RR-US571PP / RR-US571E / RR-US571EE service manuals if exist.