Pioneer AVIC-X940BT, Service Manual

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AVIC-X940BT/XNUC
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Check 13: 48 MHz Normal?
<Outline> CLOCK of a USB circuit is made using the 48 MHz master crystal oscillator (X1950).
USB_CLOCK
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 Module No. Specification value Unit
2
IC1501 50pin - DGND1
ALL 48 MHz ± 200 ppm
ppm
GND
Fig 13.2: Clock specification value
Side A
Fig 13.3: 48 MHz check point
IC1501
DVD-LSI
X1950
48MHz
crystal
VCC33 VCC12
Specification
value
DGND1
48 MHz