Pioneer AVH-P5950DVD/XN/RC Service Manual page 46

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
signal at Audio-DAC (IC1801) and are output from the HOST I/F (CN1901).
A
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), is output via CN1852.
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 DGND 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)
C
1 ADOUT3
2 SRCK
3
LRCK
Specification
value 1
GND
D
Side A
E
F
Fig 10.3: Serial 3 lines check points
46
1
2
LRCK IC1801
Audio-DAC
ADOUT3
SRCK
IEC
Fig 10.1: Audio circuit
Specification value 1
VCC33 V-0.6 V or higher
VCC33 V-0.6 V or higher
VCC33 V-0.6 V or higher
Specification
value 2
Fig 10.2: Serial 3 lines specification value
AVH-P5950DVD/XN/RC
2
3
LO
RO
GNDAU
Specification value 2
Reference waveform
0.4 V or lower Waveform 1
0.4 V or lower Waveform 2
0.4 V or lower Waveform 3
3
4
CN1901
HOST I/F
CN1852
SRCK
LRCK
ADOUT3
4