Flow Chart of Troubleshooting
10-2. RF
10-2-1. GSM900 RX
Continuous RX ON
RF Input : 62 CH
AMP :
|
|
| ① | |
NORMAL CONDITION | NO | Check soldered status of | ||
|
| |||
Catch the channel ? |
|
| L103, C101, C104, L101 | |
YES |
|
|
|
|
|
|
| ② | |
F100 Check | NO | RFS101, C100 |
| |
|
|
| ||
Pin #17 ≥ |
|
| Resolder or Change |
|
YES |
|
|
|
|
|
|
| ③ | |
F100 Check | NO | F100 Resolder or Change |
| |
Pin #5,6 ≥ |
|
|
| |
YES |
|
|
|
|
|
|
|
| |
NO
UCD100 Check
Pin#6,7 ≥
YES
NO
UCD100 Check
Pin#27 =1.8V ?
YES
④
Check soldered status of L108, L109, C121
CHECK UCD301
UCD100 Check | NO |
| ||
Pin#34 =Clean 2.8V? |
|
| ||
| YES |
|
| |
UCD100 Check | NO |
| ||
Pin#35,36,37,38=100mV? |
|
| ||
| YES |
|
| |
|
|
| ||
|
|
| UCD100 Check | NO |
|
|
| Pin #21 : 26MHz ? | |
|
|
|
| |
|
|
| Vpp : 1.1V? |
|
|
|
| YES |
|
|
| ⑥ |
|
|
|
|
|
|
|
|
|
| UCD100 |
|
|
|
| Change or resolder |
|
|
|
|
|
|
⑤
C113, UCD301
Check or resolder
TCX101 Check | NO | |
Pn#3 : Freq =26MHz, | ||
Vpp=1.2V? |
| |
YES |
| |
|
|
|
UCD100 |
|
|
Check & resolder |
|
|
⑦
TCX101 Check & resolder
Check UCD301
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
