Is The Audio Circuit Ok?; Audio Circuit; Serial 3 Lines Specification Value; Serial 3 Lines Check Points - Pioneer AVH-X1500DVD/XNUC Service Manual

1
Check 10: Is the audio circuit OK?
<Outline> The serial 3 lines digital output + DACCLK, output from DVD-LSI (IC1501), are converted to analog audio
A
signal at Audio-DAC (IC1801) and are output from the HOST I/F (CN1952).
Simultaneously, the analog MUTE signal is also output from DVD-LSI (IC1501) via the HOST I/F.
The digital audio signal (IECOUT), output from DVD-LSI (IC1501).
IC1501
DVD-LSI
B
<Check method> Playback DVD-REF-A1 TITLE 2 CHAPTER 1 (48 k/16 bit 1 kHz 0 dB),
and check with DGND1 being the reference.
In case of NG, check the applicable line, periphery of major components as described in the above drawing,
soldering of the peripheral components and defective components.
No. Check point 1 (stylus) Specification value 1
1 ADOUT
2 SRCK
3 LRCK
C
Specification
value 1
GND
Side A
D
E
F
Fig 10.3: Serial 3 lines check points
54
1
2
IECOUT
LRCK
IC1801
ADOUT
Audio-DAC
SRCK
Fig 10.1: Audio circuit
VCC33V - 0.6 V or higher 0.4 V or lower
VCC33V - 0.6 V or higher 0.4 V or lower
VCC33V - 0.6 V or higher 0.4 V or lower
Specification
value 2
Fig 10.2: Serial 3 lines specification value
151pin ADOUT signal
150pin LRCK signal
149pin SRCK signal
AVH-X1500DVD/XNUC
2
3
LO
RO
GNDAU
Specification value 2 Reference waveform
Waveform 1
Waveform 2
Waveform 3
DGND1
3
4
CN1952
HOST I/F
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