4. TROUBLE SHOOTING
- 61 -
(4) Checking PAM Control Signal
TX_RAMP (R509)
PA_EN (R502)
GPO_17
GPO_16
150
R505
VBAT
C507
22u
27p
C509
C532
100p
R508
180
RF2.85V
C501
27p
28
VDD2
32
26
XEN
27
XOUT
GND4
RFOD
22
RFOG
23
RXQP
24
DIAG1
DIAG2
25
29
GND2
GND3
30
31
6
GSM_IN
1
2
PAC_ENABLE
VCC1A
3
8
VCC1B
4
BS
DCS_PCS_IN
5
GND1
7
GND2
9
10
R502
100
0.01u
C506
RF2.85V
R504
150
R503
36
30
R506
100
R501
22n
C525
180
R507
PA_BAND
PA_EN
PA_EN
TX_RAMP
Go to Next Step
Similar?
Yes
No
Redownload S/W
Check TX_RAMP and PA_EN
Check if there is
Any Major Difference or not
Refer to Graph 4 - 7
i
Test Points
Waveform
Checking Flow
Circuit Diagram
Graph 4-6
Figure 4-11
Содержание C2100
Страница 1: ...Service Manual Model C2100 Service Manual C2100 P N MMBD0048201 Date April 2005 Issue 1 0 ...
Страница 54: ...4 TROUBLE SHOOTING 55 4 2 TX Trouble SW500 U503 X500 FL500 U501 U505 5 4 1 3 2 Test Points Figure 4 7 ...
Страница 70: ...4 TROUBLE SHOOTING 71 4 7 MIC Trouble Soldering Check U203 C225 C224 C230 Test Points Figure 4 18 ...
Страница 76: ...4 TROUBLE SHOOTING 77 4 10 KEY backlight Trouble Test Points Figure 4 21 ...
Страница 104: ... 105 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: ......
Страница 135: ......