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4 . TROUBLE SHOOTING
Table 4-2
EGSM_Tx
DCS PCS_Tx
EGSM DCS_ Rx
PCS_Rx
VC1
L
L
L
H
ANT SW CONTROL TABLE
VC2
L
H
L
L
VC3
H
L
L
L
For the test,
TX Stand alone Mode is needed. Refer to
chapter 11 (PL=7 for GSM, PL=2 for DCS)
Check VC1, VC2, VC3
Changing board
Go to 4.3.5 Checking PAM
control singnal
Changing SW500
Changing SW500
Pin17 : ~29.5dBm
Pin15 : ~26.5dBm
Open
No
No
No
No
Yes
Yes
Yes
Yes
Short
END
Check RF Level of
FL500 Pin 17 (for GSM) & Pin 15
(for DCS)
Check SW500.ANT, RF with RF
Cable connected.
Check SW500.ANT, RF
with RF Cable disconnected
Checking Flow
Check R512, R515, R517
Check whether FEM
Set as TX mode
Refer to Graph4-6(a), 4-6(b)
Refer to Table 4-3
Содержание B2050
Страница 7: ... 6 2 PERFORMANCE 2 PERFORMANCE 2 1 H W Features ...
Страница 8: ... 7 2 PERFORMANCE ...
Страница 9: ... 8 2 PERFORMANCE 2 2 Technical Specification ...
Страница 10: ... 9 2 PERFORMANCE ...
Страница 11: ... 10 2 PERFORMANCE ...
Страница 12: ... 11 2 PERFORMANCE ...
Страница 13: ... 12 2 PERFORMANCE ...
Страница 53: ... 52 4 2 TX Trouble TEST POINT 13Mhz OSCILLATOR Mobile SW FEM TRANCEIVER LDO PAM 4 TROUBLE SHOOTING ...
Страница 57: ... 56 3 Checking Ant SW Mobile SW 4 TROUBLE SHOOTING ...
Страница 67: ... 66 TEST POINT 4 6 LCD Trouble 4 TROUBLE SHOOTING ...
Страница 70: ... 69 4 TROUBLE SHOOTING TEST POINT 4 7 Speaker Trouble ...
Страница 77: ... 76 4 TROUBLE SHOOTING 4 10 KEY backlight Trouble TEST POINT ...
Страница 91: ... 90 5 DOWNLOAD AND CALIBRATION 6 Press Start and Pover on the phone using JIG remote Power on Switch 1 ...
Страница 92: ...5 DOWNLOAD AND CALIBRATION 91 5 2 Calibration ...
Страница 93: ... 92 5 DOWNLOAD AND CALIBRATION ...
Страница 97: ......
Страница 103: ... 102 Figure 8 1 B2050 BOTTOM SIDE PCB LAYOUT 8 PCB LAYOUT ...
Страница 104: ... 103 8 PCB LAYOUT Figure 8 1 B2050 TOP SIDE PCB LAYOUT ...
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Страница 113: ...10 STAND ALONE TEST 112 ...
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