Trouble Shooting Guide, Electrical 
3.2 Calibrate 1800 
Routine  Repair Action 
GSM1800_Calibrate_RXVCO: 1) N1200 
2) B1300, V1300, C1311, C1314 
3) N1202 
GSM1800_Calibrate_TXVCO: 1) N1200 
  2) B1300, V1300, C1311, C1314 
 3) N1202 
GSM900_Loop_BW_Calibration: 1) N1200 
  2) B1300, V1300, C1311, C1314 
 3) N1202 
GSM1800_PA_Isolation: 1) N1200 
  2) B1300, V1300, C1311, C1314 
GSM1800_Check_Output_Power: 1) N1400 
  2) N1200 
  3) N2600 
 4) W1410 
GSM1800_Measure_Multiframe_XXX: 
(XXX can be : High or Low) 
1) N2600 
GSM1800_Calc_XXXX_Power_DAC: 
(XXXX can be: Full, Low Up, High 
Up, High Down or Low Down) 
1) No repair action 
GSM1800_Calibrate_RSSI  1) N1200 
  2) B1300, V1300, C1311, C1314 
 3) N1202 
3.3 Calibrate 1900 
Routine  Repair Action 
GSM1900_Calibrate_RXVCO: 1) N1200 
2) B1300, V1300, C1311, C1314 
3) N1202 
GSM1900_Calibrate_TXVCO: 1) N1200 
  2) B1300, V1300, C1311, C1314 
 3) N1202 
4/00021-2/FEA 209 544/86 C 
 Sony Ericsson Mobile Communications AB 
5(7)