Flow Chart of Troubleshooting
10-2-3. EGSM TX
① | PAM100 pin12 | NO | PAM100 | NO |
: about 2~3 |
|
| ||
| pin6 : 2.8 V? |
| ||
| dBm? |
|
|
|
YES
YES
③ check&changeC199,RFS100
U107
check & change
②
CONTINOUS TX ON CONDITION
TX POWER DAC: 600 CODE APPLIED
CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
PAM100 |
| NO | BATTERY | |
pin7 : 3.7 | V? |
|
| check & change |
|
|
|
|
|
| YES |
|
|
|
| PAM100 | NO | R118 |
|
|
|
| ||
| pin 8 : 1.6V ? |
| Check |
|
| YES |
|
|
|
NO | PAM100 pin11 |
|
|
|
| about : |
|
|
|
| ? |
|
|
|
| YES |
|
|
|
| PAM100 | NO |
|
|
| pin 4 : 2.9V? |
|
|
|
| YES |
|
|
|
| PAM100 | U107 |
|
|
| change or resolder | check |
|
|
| NO | U102 |
| ⑤ |
|
| pin12,13,25,26, | ||
|
| 28 : 2.8V ? |
|
|
|
|
| YES |
|
|
|
|
| U102 |
NO
| U107 | pin30,31 : | |||
| pinA13,C172 | 26MHz ? | |||
⑥ change or resolder | |||||
|
|
|
|
| YES |
|
|
| NO | U102 | |
|
|
|
| pin4,5,6,7:100m | |
|
|
|
| V? | |
|
|
|
|
| YES |
|
|
|
|
| |
|
|
|
|
|
|
U107 |
|
|
|
| |
change or resolder |
| U102 |
|
| change or resolder |
|
|
|
OSC100 change or resolder
⑦
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