4.7 Receiver Trouble
- 56 -
4. TROUBLE SHOOTING
Re-soldering U201
START
Check the signal level of
RCVP &RCVN at R206,R207.Are
these voltage is about 1.2V?
Check the signal level at R209.Is
it almost 0?
Check the contact state of dual
mode speaker.
The dual mode speaker will work
properly.
No
Yes
Yes
No
No
Check the soldering
of U201
Replace the dual mode speaker
No
No
Yes
Yes
Re-soldering
R206,R207
Check the soldering
R206 &R207
Replace the Main board.
ABB is out of order.
Replace U201
39p
C207
C212
39p
VA200
4.7
R207
VA201
5
7
NC2
2
NO1
10
NO2
1
V+
NLAS4684MR2
U201
COM1
3
COM2
9
GND
6
4
IN1
8
IN2
NC1
CN200
1
2
R206
4.7
R209
100K
39p
C210
SP201
SP200
C211
39p
RCVP
RCVN
SPK_RCV_EN
U201
R207 R209
R206
Figure 4-20.
Содержание C3100
Страница 1: ...Service Manual Model C3100 Service Manual C3100 P N MMBD0033001 Date June 2004 Issue 1 0 ...
Страница 51: ...Graph 4 15 EGSM TX 50 VCX VC2 VCX VC2 4 TROUBLE SHOOTING Graph 4 14 DCS TX ...
Страница 67: ...5 DISASSEMBLY INSTRUCTION Figure 5 1 Figure 5 2 66 5 DISASSEMBLY INSTRUCTION ...
Страница 68: ... 67 5 DISASSEMBLY INSTRUCTION Figure 5 3 Figure 5 4 ...
Страница 69: ... 68 Figure 5 5 5 DISASSEMBLY INSTRUCTION ...
Страница 70: ... 69 5 DISASSEMBLY INSTRUCTION Figure 5 6 Figure 5 7 1 3 2 4 1 2 3 ...
Страница 71: ... 70 Figure 5 8 Figure 5 9 5 DISASSEMBLY INSTRUCTION 4 2 3 1 2 1 ...
Страница 72: ... 71 5 DISASSEMBLY INSTRUCTION Figure 5 10 ...
Страница 83: ... 82 7 BLOCK DIAGRAM 7 BLOCK DIAGRAM Power supply ...
Страница 90: ... 89 9 PCB LAYOUT 9 PCB LAYOUT ...
Страница 91: ... 90 9 PCB LAYOUT ...
Страница 98: ... 97 11 3 HW Test Software for Standalone Test Setup 11 STAND ALONE TEST ...
Страница 100: ... 99 Tx Stand alone Test Setting 11 STAND ALONE TEST ...
Страница 102: ... 101 Rx Stand alone Test Setting 11 STAND ALONE TEST ...
Страница 104: ... 103 12 3 Equipment Setup Figure 12 1 Equipment Setup 12 AUTO CALIBRATION ...
Страница 107: ... 106 12 AUTO CALIBRATION ...
Страница 108: ... 107 13 EXPLODED VIEW REPLACEMENT PART LIST 13 EXPLODED VIEW REPLACEMENT PART LIST 13 1 Exploded View ...
Страница 109: ... 108 13 EXPLODED VIEW REPLACEMENT PART LIST ...