Gsm/Gprs/Edge Repair Procedure - Asus M930 Troubleshooting Manual

10.5 GSM/GPRS 10.5 10.5 10.5 GSM/GPRS/EDGE GSM/GPRS GSM/GPRS
EGG Board Level
Repair Procedure
FEM has R、T、M
waveforms
Tx or Rx path fail
U811 (low band) should
higher than U810 (high
band) about 1dB
Check U811, U810, andU800
華 碩 電 腦
華 碩 電 腦
/EDGE Repair /EDGE /EDGE Repair Repair Procedure Repair
No
YES
Rx
Tx
YES
No
Restart EGG Board Level Repair
Procedure
Recalibration
GTC ■
Procedure Procedure Procedure
Check relevant components on
the path
Check
1. C826 is 3.8V
2. C802 is 2.75V and C805 is
1.8V
3. R828 has 26MHz
Check the four Rx filter
Check range of Vapc：
Low band 0.25(PL19) ~ 1.3V
(PL5)
Check U801 (SKY77513)
46
Service Manual
No
ASUS Proprietary