Pioneer AVH-X8500BHS Service Manual page 61

5
Check 13: 48 MHz Normal?
<Outline> CLOCK of a USB circuit is made using the 48 MHz master crystal oscillator (X1950).
X1950
48MHz
crystal
Fig 13.1: Clock configuration
<Check method> Turn the power on, and check with DGND1 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 50pin - DGND1
GND
Fig 13.2: Clock specification value
Side A
Fig 13.3: 48 MHz check point
5
6
IC1501
DVD-LSI
USB_CLOCK
VCC33
Module No.
ALL
Specification
value
AVH-X8500BHS/XNUC
6
7
VCC12
Specification value
48 MHz ± 200 ppm
7
8
Unit
ppm
48 MHz
DGND1
61
8
A
B
C
D
E
F