Nokia 5190 Service Manual tuning
PAMS Technical Documentation
NSB–1/3 Series Transceivers
Tuning Instructions
Original 06/98
NSB–1/3
PAMS
Tuning Instructions
CONTENTS
Tuning Instructions 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Required Equipment 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Setup 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Setup for Tuning a Phone without Removing Covers 5
Flash Concept for NSB–1/3 6. . . . . . . . . . . . . . . . . . . . . . . . . .
Light Flash Concept for NSB–1/3 7. . . . . . . . . . . . . . . . . . . . .
Tuning With Covers Off – Using Test–frame JBS–19 8. . . .
Tuning With Covers Off – using Light Jig JBT–1 9. . . . . . . .
Warranty Transfer 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tuning Steps 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. RX Calibration (AGC + AFC) 11. . . . . . . . . . . . . . . . . . . . . .
2. I/Q Modulator Amplitude Balance and Phase Shift Tuning 12
3. Tuning of Transmitter Power Levels 14. . . . . . . . . . . . . . . .
4. Energy Management Calibration 15. . . . . . . . . . . . . . . . . . .
Technical Documentation
Page 2
Original 06/98
PAMS
NSB–1/3
Technical Documentation
Tuning Instructions
General
All tuning operations of the NSB–1/3 are carried out using the service
software. The service software turns the phone into the locals mode, in
which the phone can be outwardly controlled via the MBUS interface.
Tuning is based on the software communicating with the D/A and A/D
converters of the phone. In some instances the phone processor will also
calculate the required correction parameter.
The tuning values of the phone reside on the EEPROM. The contents of
the EEPROM can be read by the service software and saved as a file.
This is advisable when there is need to retain that information, e.g. in
view of replacement of the circuit. The program also enables writing the
default parameters on the EEPROM, in which case all tuning steps should
be carried out.
Tuning Instructions
During tuning, proceed as follows:
– Take care not to damage sensitive measuring instruments with exces-
sive RF power.
– Carry out all tuning steps in the shortest possible time to avoid exces-
sive heating of RF units.
– Perform all tuning steps in the order presented.
– Never try to mask a fault by tuning it out!
Original 06/98
Page 3
NSB–1/3
PAMS
Tuning Instructions
Required Equipment
– PC/AT computer with service software; see separate section for
instructions on installation and use.
– Service accessories; see equipment setup pictures.
– Multimeter or DVM.
– GSM radio telephone test station or separate measuring equipment as
follows:
– RF generator
– pulse power meter
– spectrum analyzer
– attenuator and branching unit
Equipment Setup
Technical Documentation
Caution: Make sure that you have switched off the PC and the printer
before making connections !
Caution: Do not connect the PKD–1 key to the serial port. You may
damage your PKD–1 !
Attach the protection key PKD–1 to parallel port one (25–pin female
D–connector) of the PC. When connecting the PKD–1 to the parallel port
be sure that you insert the PC end of the PKD–1 to the PC (male side). If
you use a printer on parallel port one, place the PKD–1 between the PC
and your printer cable.
Next connect the M2BUS service cable, DAU–9P, to the serial port
(RS–232) of the computer. Attach one end of the service cable to the PC
serial port and the other end to the service box, JBA–4. For servicing the
phone with the covers in place the service box should always be used.
When the phone covers are removed the jigs should be used.
For audio measurements connect the audio cable, ADS–1, as follows:
– EAR line to AF INPUT of test equipment
– MIC line to MOD GEN OUTPUT of test equipment
Page 4
Original 06/98
PAMS
NSB–1/3
Technical Documentation
Tuning Instructions
Equipment Setup for Tuning a Phone without Removing Covers
4.
1.
5.
2.
3.
Item: Service accessory: Product code:
1 Service Battery BBD–3 0775071
2 DC Cable SCB–3 0730114
3 Service MBUS Cable DAU–9P 0730109
4 Software protection key PKD–1 0750018
5 Service SW diskette 3.5” 0774080
Original 06/98
Page 5
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