4. Troubleshooting
- 57 -
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
Summary of Contents for KG300
Page 3: ... 4 ...
Page 11: ...2 Software Download Procedure 12 Select default folder Press Install ...
Page 12: ...2 Software Download Procedure 13 Press Finish Enable Leo Download tool ...
Page 19: ...3 Assembly and Disassembly 20 v Take off the Main Board from B Cover Receiver Keypad ...
Page 53: ...4 Troubleshooting 54 7312 RF Placement PX Path TX Path ...
Page 57: ...4 Troubleshooting 58 RF transceiver U602 ...
Page 61: ...4 Troubleshooting 62 U602 U601 J601 ...
Page 62: ...5 Circuit Diagrams 63 SYSTEM BLOCK DIAGRAM 5 CIRCUIT DIAGRAMS ...
Page 67: ... 68 ...
Page 76: ... 77 6 PCB LAYOUT ...
Page 77: ... 78 6 PCB LAYOUT ...
Page 79: ... 80 ...
Page 84: ...Note ...
Page 85: ...Note ...