Pioneer AVH-X8500BHS Service Manual page 50

1
Check 5: 27 MHz Normal?
A
<Outline> Each clock is created inside the IC1501 using the 27 MHz master crystal oscillator (X1501).
X1501
27 MHz
crystal
B
Fig 5.1: Clock configuration
<Check method> Turn the power on, and check with DGND being the reference.
In case of NG, check the applicable line, periphery of IC1501,
soldering of the peripheral components and defective components.
No. Check point
2 IC1501 156pin - DGND1
C
GND
Side A
D
E
F
Fig 5.3: 27 MHz check point
50
1
2
IC1501
DVD-LSI
OSCO
OSCI
VCC33
Module No.
ALL
Specification
value
Fig 5.2: Clock specification value
IC1501 156pin
AVH-X8500BHS/XNUC
2
3
VCC12
Specification value
27 MHz ± 50 ppm
DGND1
3
4
Unit
ppm
4