Nokia 7110 Manual page 22

Service & Analysis Center Europe
SACE AMS Training Group
2. TX - POWER FAULTS
3. TX FAULT AT GSM 900
Check 13 MHz Reference Freq. output at G701 ( and VC / AFC Pins ) --- If not ok – change G701.
Check 13 MHz Reference Freq. at N700 / Pin 15 --- If not ok – change N700.
Check VHF Oscillator Freq. 464 MHz at N700 / Pin 8 --- If not ok,
check values at G 702 ( VC / VCC ) --- change Oscillator if necessary.
Check 116 MHz at N700 / Pin 44,45 --- If not ok – change N700.
Check 116 MHz at N600 / Pin 25,26.
Check UHF Oscillator Freq. 2036 MHz at N600 / Pin 4 --- If not ok – change G700.
Check PA_GSM 902 MHz at N600 / Pin 22 --- If not ok – change N600.
Check PA_GSM 902 MHz at N500 / Pin 1 --- If not ok – check / change Z601 in & out (if possible).
Check PA_GSM 902 MHz at N500 / Pin 4 --- If not ok,
check CTL_GSM at N500 / Pin 2 => 0,7 – 1,7 Vpp squarewave / depends on Powerlevel.
If this happens --- change N500.
Check PA_GSM 902 MHz at L500 in & out ( or if bend ) --- If not ok – change L500.
Check PA_GSM 902 MHz at Z503 ( input ) --- If not ok – change Z500 after lifting case.
Check PA_GSM 902 MHz at X500 / X501.
4. TX FAULT AT GSM 1800
Check 13 MHz Reference Freq. output at G701 ( and VC / AFC Pins ) --- If not ok – change G701.
Check 13 MHz Reference Freq. at N700 / Pin 15 --- If not ok – change N700.
Check 464 MHz at N700 / Pin 8 --- If not ok – change G702.
Check 232 MHz at N700 / Pin 46 --- If not ok – change N700.
Check 232 MHz at N600 / Pin 35,37 --- If not ok – check outputs at Z 702 / change if necessary.
Check UHF Oscillator Freq. 1979,8 MHz at N600 / Pin 4 --- If not ok,
check values at G 700 ( VC / VCC ) --- change Oscillator if necessary.
Check PA_PCN 1747,8 MHz at N600 / Pin 40 --- If not ok – change N600.
Check PA_PCN 1747,8 MHz at Z603 in ( at L 613 ) & out --- If not ok – change Z603.
Check PA_PCN 1747,8 MHz at N502 in ( Pin 1 ) & out ( Pin 4 ) --- If not ok – change N502.
Check PA_PCN 1747,8 MHz at Z502 in ( C 515 ) & out ( R513 ) --- If not ok – change Z502.
Check PA_PCN 1747,8 MHz at N501 / Pin 4 --- If not ok,
check CTL_PCN at N500 / Pin 2 => 0,12 – 0,2 Vpp squarewave / depends on Powerlevel
If this happens --- change N501.
Check PA_PCN 1747,8 MHz at L503 in & out ( or if bend ) --- If not ok change L503.
Check PA_PCN 1747,8 MHz at Z504 output (Pin Ant / Throughhole connection).
If output at Z504 not ok – change Z504.
Check VC ( 0,9 Vpp squarewave ) for Z504 (at C 507).
Check VTX ( 2,8 V pulsed ) at N503 / Pin 1 --- If not ok – change N100.
Check BAND_SEL ( low Level ) at N503 / Pin 2 --- If not ok – change N600.
If BAND_SEL and / or VTX not ok after changing N100 / N600 => probably MAD faulty
Check PA_PCN 1747,8 MHz at Z 503 / X501 / X500.
Repairhints_nse5_002508
CONFIDENTIAL
NSE-5
Repairhints
30.07.2000
REFERENCE IS : CH 60 / 902 MHZ
REFERENCE IS : CH 700 / 1747,8 MHZ
Checked by:
AMS TRAINING GROUP
22 (30)
Version 1.0 Approved
Approved by:
SACE