Pioneer AVIC-D3/XU/UC Service Manual page 185

5
Check 9: Is DACCLK normal?
<Outline> DACCLK for Audio-DAC is created by IC1501 using the 27 MHz master crystal oscillator (X1501).
IC1501
X1501 DVD-LSI
27 MHz
crystal
Fig 9.1: Clock configuration
<Check method>
DVD: DVD-REF-A1 TITLE 1
CD: Playback a normal CDDA.
Common to all DVD-V compatible modules.
Check with DGND being the reference.
In case of NG, check the applicable line, the periphery of IC1501, soldering of the peripheral components and
defective components.
NO. Check point 1 (stylus)
1 DACCK
2 DACCK
Specification
value 1
Specification
value 2
GND
Fig 9.2: Clock specification value
Side A
Check point 1 (stylus)
Fig 9.3: 27 MHz, DACCLK check point
5
6
VCC33 VCC12
Media Specification value 1 Specification value 2
DVD 2.0 V~VCC33 V
CD 2.0 V~VCC33 V
Specification
value 3
Check point 2 (IC1501 172 pin)
AVIC-D3/XU/UC
6
7
IC1801
Audio-DAC
DACCLK
DGND~0.8 V
DGND~0.8 V
7
8
Specification value 3
36.864 0 MHz ± 300 ppm
33.868 8 MHz ± 300 ppm
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8
A
B
C
D
E
F