Pioneer DVH-335UB/XNRC Service Manual page 32

1
Check 5: 27 MHz Normal?
A
<Outline> Each clock is created inside the IC1501 using the 27 MHz master crystal oscillator (X1501).
OSCO
X1501
27 MHz
OSCI
crystal
B
<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.
C
NO. Check point
2 IC1501 169pin
Specification
value
GND
D
Fig 5.2: Clock specification value
Side A
E
F
Fig 5.3: 27 MHz check point
32
1
2
IC1501
DVD-LSI
VCC33 VCC12
Fig 5.1: Clock configuration
Specification value
Module No.
27 MHz
ALL
± 50 ppm
DVH-335UB/XNRC
2
3
Unit
ppm
IC1501 158pin
DGND1
3
4
4