Samsung SGH-T429 Service Manual - Page 52
GSM Receiver
 |
View all Samsung SGH-T429 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 52 highlights
Flow Chart of Troubleshooting 9-12. GSM Receiver RX ON RF input : CH center freq : +67.7kHz Amp : -50dBm Yes F100 Pin13 No >= -65dBm Resolder CN100,C104 Yes F100 Pin1,2 >= -68dBm Yes U101 pin 23 >= -70dBm pin 24 >= -70dBm No Check F100 pin9,pin10 = L Yes No Resolder C116, C119, L113 Yes No U101 pin 4,5,6,7 >= 1V U101 pin12,13,28,29 >=2.8V Yes Yes Check UCP200 No Check ANT Switch control circuit Resolder F100 No Check & Resolder U101, RF PSU Part Resolder U101 END 9-20 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
-
1 -
2
-
3
-
4
-
5
-
6
-
7
-
8
-
9
-
10
-
11
-
12
-
13
-
14
-
15
-
16
-
17
-
18
-
19
-
20
-
21
-
22
-
23
-
24
-
25
-
26
-
27
-
28
-
29
-
30
-
31
-
32
-
33
-
34
-
35
-
36
-
37
-
38
-
39
-
40
-
41
-
42
-
43
-
44
-
45
-
46
-
47 -
48 -
49 -
50 -
51 -
52 -
53 -
54 -
55 -
56 -
57 -
58
-
59
-
60
-
61
-
62
-
63
-
64
 |
 |
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-20
9-12. GSM Receiver
RX ON
RF input : CH center freq : +67.7kHz
Amp : -50dBm
Yes
F100 Pin13
>= -65dBm
No
Resolder
CN100,C104
Yes
Check ANT Switch
control circuit
F100 Pin1,2
>= -68dBm
Check F100
pin9,pin10
=L
No
No
Yes
Yes
Resolder F100
No
Resolder
C116, C119, L113
U101
pin 23
>= -70dBm
pin 24
>= -70dBm
Yes
No
U101
pin12,13,28,29
>=2.8V
U101
pin 4,5,6,7
>= 1V
No
Check & Resolder
U101,
RF PSU
Part
Yes
Yes
Resolder U101
Check
UCP200
END