4. TROUBLE SHOOTING
- 59 -
(1) Checking Regulator Circuit
U303. 3
U303. 5
VRF
VBAT
4
BYP
EN
3
GND
2
1
IN
5
OUT
U303
MIC5255-2.85BM5
4.7u
C345
C344
10u
0.01u
C343
CLKON
Pin 3.High ?
Yes
Changing the Board
RF 2.85VO.K?
Yes
No
Replace U303
Regulator Circuit is OK
See next Page to check
VCTCXO
No
Check Pin 5.
Test Points
Circuit Diagram
Checking Flow
Figure 4-9
Содержание C1150
Страница 1: ...Service Manual Model C1150 Service Manual C1150 Date October 2005 Issue 1 0 ...
Страница 3: ......
Страница 94: ...5 DOWNLOAD AND CALIBRATION 95 11 Wait until Sending Block is completed 1 Wait Until Sending Block is completed ...
Страница 99: ...Note 100 ...
Страница 104: ... 105 8 PCB LAYOUT 8 PCB LAYOUT ...
Страница 105: ... 106 8 PCB LAYOUT ...
Страница 113: ...10 STAND ALONE TEST 114 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Страница 117: ...Note 118 ...
Страница 119: ... 120 Note ...
Страница 135: ...Note 136 ...