4. TROUBLE SHOOTING
- 81 -
ANT SW
VC_EGSM
VC_CDSPCS
DCS TX
0
1
EGSM TX
1
0
EGSM, DCS RX
0
0
Table 4-2
Figure 4-11.
CHECKING FLOW
Check SW500.ANT, RF with RF
Cable connected.
Open
Yes
Changing SW500
Check SW500.ANT,RF
with RF Cable disconnected
Short
Yes
Changing SW500
No
No
Check C522,C528
Check whether Ant SW
Set as TX mode
Refer to Graph 5
Refer to Table 4-3
Yes
Check VC_EGSM,
VC_DCSPCS
Check RF Level of
FL500 Pin 9(for GSM) & Pin 3 (for DCS)
Pin9 : ~29.5dBm
Pin 3 : ~26.5dBm
No
Yes
No
Changing board
Go to 4.3.5 Checking PAM
control signal
END
For the test,
TX Stand alone Mode is needed. Refer to
chapter 11 (PL=7 for GSM, PL=2 for DCS)
Содержание KG920
Страница 3: ... 4 ...
Страница 48: ...3 TECHNICAL BRIEF 49 3 8 2 AFE Analog Front End Figure 3 22 ...
Страница 52: ...3 TECHNICAL BRIEF 53 3 8 5 MBGM01 5M CCD ISP Figure 3 25 ...
Страница 55: ...3 TECHNICAL BRIEF 56 3 8 6 MV8620 5M back end IC Multi Media Function Figure 3 26 ...
Страница 58: ...3 TECHNICAL BRIEF 59 3 9 MIDI IC YMU787 Figure 3 27 YMU787 BLOCKDIAGRAM ...
Страница 87: ...4 TROUBLE SHOOTING 88 Graph 4 8 BLUE RST Graph 4 9 DEBUG_TX RX Graph 4 10 PCM_SYNCS TX RX USC0 ...
Страница 96: ...4 TROUBLE SHOOTING 97 4 7 KEY backlight Trouble TEST POINT Q101 R122 Q101 LD101 LD119 Figure 4 38 Figure 4 39 ...
Страница 108: ...4 TROUBLE SHOOTING 109 CIRCUIT WAVEFORM Figure 4 59 Graph 4 11 Figure 4 60 Figure ...
Страница 109: ...4 TROUBLE SHOOTING 110 TEST POINT U602 FB602 U100 Q100 Q101 C113 C114 Figure 4 61 Figure 4 62 ...
Страница 111: ...Figure 4 65 Graph 4 12 4 TROUBLE SHOOTING 112 C102 C113 U101 Figure 4 66 C137 U103 TEST POINT WAVEFORM ...
Страница 112: ...4 TROUBLE SHOOTING 113 Figure 4 67 Figure 4 68 CIRCUIT ...
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