Pioneer PDP-507CMX Service Manual page 113

5
B
Is the audio signal waveform input
to Pin 15 of IC5308?
Yes
Waveform 46
No
When INPUT1 input is selected, is
the audio signal waveform input to
Yes
Pin 1 of IC5308?
Waveform 46
No
Note: When INPUT 2 input is selected, you can
observe waveform at IC5308-3pin.
Failure in the audio input
connectors or the audio output
equipment
Failure analysis for the
AUDIO OUT on the MAIN Assy ⇒ AU2
No
Is the cable that connects
Yes
between the AUDIO OUT jack
and the equipment broken or
short-circuited to ground?
No
Is the connected equipment
terminated with 22 kohms or
more?
Yes
Is 12 Vdc power input to Pin 14 of
IC5308?
Yes
Is an audio waveform output from
the audio input terminal of IC5308
(Pin 1 for INPUT 1, Pin 3 for
INPUT 2, or Pin 5 for video slot
input)?
Waveform 46
Yes
Is an audio waveform output from
Pin 15 of IC5308?
Waveform 46
Yes
Failure in the audio muting circuit
on the MAIN Assy for the AUDIO
OUT connector, or poor
connection of the AUDIO OUT
connector.
5
6
Failure in the IC5306
Failure in the IC5308
Change the connecting cable.
Connect equipment whose input
impedance is 22k ohms or more.
No
(No sound when the connected
equipment is terminated with 75
ohms)
No
Failure in IC5308 or IC5306
Failure in the equipment
No
connected via the input
connector, or poor connection of
the audio input connector
The connector (INPUT 1-5) to
No
which the audio signal is input is
not selected, or failure in IC5308.
6
7
PDP-507CMX
7
8
A
B
C
D
E
F
113
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