Pioneer AVH-P7800DVD [197/280] Check 11 audio circuit ok

Pioneer AVH-P7800DVD [197/280] Check 11 audio circuit ok
AVH-P7800DVD/UC
197
5678
56
7
8
C
D
F
A
B
E
CN1901
HOST I/F
LRCK LO
ADOUT3
SRCK RO
GNDAU
CN1851
IEC
Fig.11.1 : Audio circuit
IC1821
Audio-DAC
IC1501
DVD-LSI
Check 11 : Audio circuit OK?
Reproduce DVD-REF-A1 Title 2 Chapter1 (48 k/16-bit 1 kHz/0 dB).
Checks are to be conducted using DGND as a reference.
If the locations, listed under "verification location 2", can be verified, there is no need to conduct verifications for
the locations listed under "verification location 1."
If the result is not satisfactory, check to see if there are any problems with resin flux cored solder and other
defects in the applicable line, vicinity of major parts stated in the above diagram and
peripheral components.
GND
Rated value 1
Rated value 2
Fig,11.2 : Three serial output rated values
No.
1
2
3
Verification location 1
(Sensing pin)
AOUT3
SRCK
LRCK
Verification
location 2
IC1501 pin169
IC1501 pin168
IC1501 pin167
Rated value 1
VCC33V - 0.6 V or over
VCC33V - 0.6 V or over
VCC33V - 0.6 V or over
Rated value 2
0.4 V or lower
0.4 V or lower
0.4 V or lower
Reference
waveform
Waveform 1
Waveform 2
Waveform 3
The three serial audio signals and DACCLK, output from the DVD-LSI(IC1501), are applied to the IC1821 (Audio DAC),
where they are converted into analog audio signals. These analog signals are output from the HOST I/F.
An analog MUTE signal is also outputted simultaneously.
The digital audio signal (IECOUT) outputted from DVD-LSI (IC1501) is outputted through CN1851.

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