Pioneer DVH-335UB/XNRC Service Manual page 40

1
Check 10: Is the audio circuit OK?
A
<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).
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
Fig 10.1: Audio circuit
<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.
C
NO. Check point 1 (stylus)
1 ADOUT3
2 SRCK
3 LRCK
Specification
value 1
GND
D
E
F
40
1
2
IECOUT
L R C K IC1801
Audio-DAC
ADOUT
S R C K
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
DVH-335UB/XNRC
2
3
L O
R O
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
4