Nokia NME-2A Series Guide

Programmes After Market Services (P.A.M.S.)

NME–2A SeriesTransceivers

Technical Documentation

Original 08/97

Troubleshooting

Instructions

P.A.M.S.

Technical Documentation

NME–2A

Troubleshooting Instructions

Page 2 Original 08/97

AMENDMENT RECORD SHEET

Amendment

Number Date Inserted By Comments

08/97 Original

P.A.M.S.

Technical Documentation

NME–2A

Troubleshooting Instructions

Page 3

Original 08/97

Contents

Page No

Troubleshooting Instructions 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

BB Troubleshooting Flow Diagrams 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Flash Programming OK; part 1 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Flash Programming OK; part 2 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Flash Programming OK; part 3 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Flash Programming OK; part 4 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PWR Button Fault 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Display Selftest Failed 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

No Registration to the System (no serv) 12. . . . . . . . . . . . . . . . . . . . . . . . . .

Audio Fault 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RF Troubleshooting Instructions 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RX Part 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TX Part 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

UHF Synthesizer 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

VHF Synthesizer 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

P.A.M.S.

Technical Documentation

NME–2A

Troubleshooting Instructions

Page 4 Original 08/97

[This page intentionally left blank]

P.A.M.S.

Technical Documentation

NME–2A

Troubleshooting Instructions

Page 5

Original 08/97

Troubleshooting Instructions

The purpose is to define fault block of the module and then find out the

broken component. The trouble shooting diagram has been planned so

that the fault, whatever it is, can be found by as simple measurements as

possible.

Required servicing equipment:

– PC for PCLocals

– Power supply (12 V 5 A)

– Digital multimeter

– Oscilloscope with 10:1 probes

– Spectrum analyzer (capable of 10 W input e.g. external attenuator)

– Signal generator

– Test SIM

– RF cables with BNC or N in the other end

– Modular cable

– RS232/M2BUS adapter DAU–2

– HP8922H

BB Troubleshooting Flow Diagrams

The baseband flow diagrams give you the overview of the blocks. The

purpose is that you proceed through the flow diagram so that, if your

answer is YES for the asked question, go straight to the next level, but if

your answer is NO, you have to go the sub–branch.

P.A.M.S.

Technical Documentation

NME–2A

Troubleshooting Instructions

Page 6 Original 08/97

Flash Programming OK; part 1

YES

FLASH programming OK

MBUS

registration

OK?

Display:

selftest failed D250/MCU/pin 3

D300/ASIC/pin 97

rstrobe

Power

stays on?

YES

Display:

selftest failed NO Short circuits in data

data lines. data line

disconnected, VREF

unconnected

MBUS line X100/5

+5 V after pwr on? R263

+ 5 V?

VBATT

pins 4, 16 ?

Check X102

N100/pin 8/XRESET

+5 V after pwr on?

C114 OK?

R106 OK?

Change N100

MCU/D250/PIN67/RDX

+5 V after pwr on ?

NO If D250 at

pin 66/TXD

doesn’t apply

+5 V change

D250

V250 base

∼1 V

Check

R262, R263

V250, V251

Check R257

R260, R258,

V250, R268,

Change first

D250

If R259 is OK

change D250

Power supp. to the logic

circuits +5 V after pwr on?

Change N100

YES

NO YES

YES

R270

P.A.M.S.

Technical Documentation

NME–2A

Troubleshooting Instructions

Page 7

Original 08/97

Flash Programming OK; part 2

MCU/D250/pin 10

RESETX +5 V after

power on?

26 MHz clock

D300/pin 119?

Change D300

Check components

D301, D302, C306

R913, G902, C918

26 MHz at MCU

/D250 pin 69

/MCUCLK?

MCU/D250

/pin 8/MD2,

/pin 9/STNDBY?

MCU/D250/pin 43

/XPWROFF pulses up to

+5 V after pwr on?

YES

MCU/D250/pin 77

/IRQ0 +5 V after

power on?

MCU/D250/pin 4

/WSTROBEX +5 V

after pwr on?

Change D300

Check joints

and foils

Change D250

Change D300

Check D300

Check all soldered joints

The data and address signals must

a clear difference between low (0 V)

and high (+5 V)

YES

P.A.M.S.

Technical Documentation

NME–2A

Troubleshooting Instructions

Page 8 Original 08/97

Flash Programming OK; part 3

EEPROM

initialization OK?

(FLASH8N.MES)

D253/EEPROM

YES

MBUS registration OK?

Display: selftest failed?

D253/EEPROM

/pin 27/EROMSELX pulses

+5 to 0 V during r/w

action?

Check D300 NO

/pin 1/RSTROBEX pulses

+5 to 0 V during r/w

action?

D253/EEPROM

/pin 1/WSTROBEX pulses

+5 to 0 V during r/w

action?

YES

Check D250 NO

(D300)

Check D250

(D300)

Change D253

YES

P.A.M.S.

Technical Documentation

NME–2A

Troubleshooting Instructions

Page 9

Original 08/97

Flash Programming OK; part 4

D251/FLASH

YES

/pin 11 +12 V during

programming?

D250/MCU

/pin 64/RXD2 pulses

during programming?

Check X100/pin 14

R271, L250, R264

YES

Check X100/pin 6

R252, R253, R255

X100/pin 7

/TXD2 pulses during

programming? Check D250/pin 63

R250, R251, C250

D251/FLASH

/pin 12/PWD +5 V

after power on? NO Check D300

D251/FLASH

/pin 9/ROMSELX pulses

from +5 to 0 V after

power on?

NO Check D250 (D300)

YES

D251/FLASH

/pin 37/RSTROBEX pulses

from +5 to 0 V after

power on?

NO Check D250 (D300)

D251/FLASH

/pin 38/WSTROBEX pulses

from +5 to 0 V after

power on?

NO Check D250 (D300)

Check D251/FLASH

ADDRESS/DATA LINES

/no shortcircuits or

unconnected pins allowed

Change D251

YES

R265, C264

C254

P.A.M.S.

Technical Documentation

NME–2A

Troubleshooting Instructions

Page 10 Original 08/97

PWR Button Fault

Nothing happends

N100/PSL pins

YES

5,20 +6.2 V When either

YES

when PWR button

is pressed

IGNS is high

XPWRON is low or

Check N101 pin 2

+6.2 V if not OK

N100/PSL

pin 9/XPWROFF pulses

from 0 to +5 V after

power on

Check VL1, VL2, VA2, VREF

if OK then change N100

N101/pin 4

VBATT voltage

V110 gate

is 0V

Check V101

if OK change V110

D250/pin 5,42 VL1

+5 V When XPWRON

Check V106, L100

Change N100

is push high

Check D250,

D300

YES

YES Check

V102, V103,

V104, R109,

R110, R111,

R113, R133,

R134, C100

change N101

C112, C124

R143, V107

R100, R124

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