Table of Contents
Advertisement
4.2.2 Checking VCTCXO Circuit
X400.3 X400.4
Check Pin 3.
? Refer to Graph 4-2
Check Pin 4.
? Refer to Graph 4-3
2V75_VTCXO
C435
2.2u
(1608)
Graph 4-2
13 MHz O.K?
No
2.75V OK?
No
Check U301, PMIC
X400
3
1
OUT
CTL
4
2
VCC
GND
13MHz
- 39 -
Figure 4-4
VCTCXO Circuit is OK
Yes
See next Page to check
ANT SW & Mobile SW
Yes
Changing X400
R414
15K
C432
1000p
Graph 4-3
4. TROUBLE SHOOTING
AFC
Advertisement
Table of Contents
