Nokia 7110 Manual page 19

Service & Analysis Center Europe
SACE AMS Training Group
POOR / NO SERVICE -GSM 900 / GSM 1800
RSSI Measurement Failure messages.
REFERENCE IS : CH60-947 MHZ FOR GSM 900 AND CH700-1842,8 MHZ FOR GSM 1800.
IF THERE IS ONE OF THE FOLLOWING FAILURE MESSAGES, CHECK ALSO TX–SPECTRUM.
IF IT IS ONLY RF FAULT – OR USE CCONT CHAPTER AND SEE SPECTRUM SAMPLES.
CAN´T SET HIGH REFERENCE / CAN´T SET LOW REFERENCE AT GSM 900
Check 71 MHz IF at C617 / C618 --- If not ok – Check 13 MHz Ref. Freq. at G701.
Check 71 MHz IF at N700 / Pin 37,38 --- If not ok – change Z700.
Check 13 MHz IF at Z701 in & out ( 5dB attenuation over ) --- If not ok – change Z701.
Check 13 MHz at N700 / Pin 23,24 --- If not ok – change N700.
Check GSM_LNA 947 MHz at N600 / Pin 27 --- If not ok check / change Z500 / Z503.
Check GSM_LNA 947 MHz at Z600 in & out --- If not ok – change Z600.
Check UHF Oscillator Freq. 2036 MHz at N600 / Pin 3 --- If not ok – change N600.
Check UHF Oscillator Freq. 2036 MHz at G700 ( and VC/VCC ) --- If not ok – change G700.
Change N200 ( COBBA ).
NOTE: IF COBBA HAS BEEN CHANGED, IT IS NECESSARY TO REWRITE IMEI AND SIMLOCK DATA .
ALSO RX / TX - AND TX I/Q - VALUES MUST BE REALIGNED.
CAN`T SET LOW REFERENCE AT GSM 1800
Check if Z501 is bend --- change if necessary.
Check PCN_LNA 1842,8 MHz at N600 / Pin 34-If not ok -ckeck Signal at Z504/503 and X501/500.
Check PCN_LNA 1842,8 MHz at Z602 in & out --- If not ok change Z602.
Check UHF Oscillator Freq. 2029,8 MHz at N600 / Pin 3 --- If not ok – change G700.
Check 187 MHz IF at N600 / Pin 45,46 --- If not ok – change N600.
Check 116 MHz (1/4 VHF) at N600 / Pin 9 --- If not ok – check Values at N700 and G702.
Check 71 MHz IF at C617 / C618 --- If not ok – check 13 MHz Ref. Freq. at G701.
Check 71 MHz IF at N700 / Pin 37,38 --- If not ok – change Z700.
Check 13 MHz IF at Z701 in & out ( 5dB attenuation ) --- If not ok – change Z701.
Check 13 MHz at N700 / Pin 23,24 --- If not ok – change N700.
Check GSM_LNA 947 MHz at N600 / Pin 27 --- If not ok check / change Z500 / Z503.
Check GSM_LNA 947 MHz at Z600 in & out --- If not ok – change Z600.
Check UHF Oscillator Freq. 2036 MHz at N600 / Pin 3 --- If not ok – change N600.
Check UHF Oscillator Freq. 2036 MHz at G700 ( and VC/VCC ) --- If not ok – change G700.
Change N200 ( COBBA ).
NOTE: IF COBBA HAS BEEN CHANGED, IT IS NECESSARY TO REWRITE IMEI AND SIMLOCK DATA
ALSO RX / TX - AND TX I/Q - VALUES MUST BE REALIGNED.
Repairhints_nse5_002508
CONFIDENTIAL
NSE-5
Repairhints
30.07.2000
Checked by:
AMS TRAINING GROUP
19 (30)
Version 1.0 Approved
Approved by:
SACE