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4.3.2 Checking VCTCXO Circuit
X400.3
Check Pin 3.
• Refer to Graph 4-8
Check Pin 4.
• Refer to Graph 4-9
X400.4
13 MHz O.K?
2.75V OK?
Check U301, PMIC
2V75_VTCXO
C435
2.2u
(1608)
Graph 4-8
Figure 4-11
VCTCXO Circuit is OK.
Yes
See next Page to check
ANT SW &Mobile SW.
No
Yes
Changing X400
No
C432
1000p
- 45 -
4. TROUBLE SHOOTING
R414
AFC
15K
Graph 4-9
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