Nokia 6610 Troubleshooting Instructions page 11

CCS Technical Documentation
PA & ant switch
troubleshooting
Yes
Check with RF probe
signal level on
PA input >=0dBm (*
OK ?
Yes
Check with
oscilloscope:
-VBATT ~4V
- VTXB = 2.8 V pulsed
- VTxLO_GSM = 0V (GSM900)
OK ?
No
Check components
around PA
OK ?
No
Replace
faulty
component(s)
,VVXH  
Company confidential
)LJXUH  3$ DQG $QWHQQD 6ZLWFK WURXEOHVKRRWLQJ
*(When 1kOhm passive probe is used,
correct the measurement by +26dB
Check with
Yes
oscilloscope:
-VANT_1 (GSM900)
-VANT_2 (GSM1800)
-VANT_3 (GSM1900)
Yes
Replace
PA
Yes
1RNLD &RUSRUDWLRQ
Troubleshooting Instructions
OK ?
No
Check
VANT lline components
OK ?
Yes
Replace
faulty
component(s)
Replace
HELGA
NHL-4/4U
Replace
ant. switch
No
3DJH