4. Troubleshooting
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T/R Switch(U601)
Test point part
Function
Typical value
Description
U601, pin1
D_RX
DCS RX
U601, pin2
VC3
2.8V
PCS RX control signal
U601, pin3
P_RX
PCS RX
U601, pin4
VC2
2.8V
DCS, PCS TX control signal
U601, pin5
D_TX
DCS PCS TX
U601, pin7
G_TX
GSM TX
U601, pin9
ANT
Antenna port
U601, pin10
VC1
2.8V
EGSM TX control signal
U601, pin11
G_RX
GSM RX
Содержание KG300
Страница 3: ... 4 ...
Страница 11: ...2 Software Download Procedure 12 Select default folder Press Install ...
Страница 12: ...2 Software Download Procedure 13 Press Finish Enable Leo Download tool ...
Страница 19: ...3 Assembly and Disassembly 20 v Take off the Main Board from B Cover Receiver Keypad ...
Страница 53: ...4 Troubleshooting 54 7312 RF Placement PX Path TX Path ...
Страница 57: ...4 Troubleshooting 58 RF transceiver U602 ...
Страница 61: ...4 Troubleshooting 62 U602 U601 J601 ...
Страница 62: ...5 Circuit Diagrams 63 SYSTEM BLOCK DIAGRAM 5 CIRCUIT DIAGRAMS ...
Страница 67: ... 68 ...
Страница 76: ... 77 6 PCB LAYOUT ...
Страница 77: ... 78 6 PCB LAYOUT ...
Страница 79: ... 80 ...
Страница 84: ...Note ...
Страница 85: ...Note ...