
4. Trouble Shooting
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(1) Checking Regulator Circuit
Test Points
Circuit Diagram
Checking Flow
Figure 4-2.
U303. 3
U303. 5
Pin 3. High ?
Yes
Changing the Board
RF 2.85V O.K?
Yes
No
Replace U303
Regulator Circuit is OK
See next Page to check
VCTCXO
No
Check Pin 5.
10u
C361
VRF
10u
C362
0.01u
C363
3
GND
2
1
IN
5
OUT
U303
MIC5255-2.85BM5
4
BYP
EN
R317
0
VBAT
CLKON
Summary of Contents for C1100
Page 1: ...Service Manual Model C1100 Service Manual C1100 P N MMBD0034301 Date June 2004 Issue 1 0 ...
Page 84: ... 83 5 DISASSEMBLY INSTRUCTION Figure 5 3 ...
Page 85: ... 84 Figure 5 4 5 DISASSEMBLY INSTRUCTION ...
Page 86: ... 85 5 DISASSEMBLY INSTRUCTION Figure 5 5 Figure 5 6 ...
Page 87: ... 86 5 DISASSEMBLY INSTRUCTION Figure 5 7 Figure 5 8 3 1 1 2 ...
Page 88: ... 87 Figure 5 9 5 DISASSEMBLY INSTRUCTION ...
Page 89: ...5 DISASSEMBLY INSTRUCTION 88 Figure 5 10 Figure 5 11 ...
Page 90: ...5 DISASSEMBLY INSTRUCTION 89 Figure 5 12 3 2 1 ...
Page 106: ... 105 9 PCB LAYOUT 9 PCB LAYOUT ...
Page 107: ... 106 9 PCB LAYOUT ...
Page 114: ... 113 Figure 11 1 HW test program Figure 11 1 HW test program 11 STAND ALONE TEST ...
Page 119: ... 118 Note ...