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
YES
NO
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
NO
NO
NO
Power supp. to the logic
circuits +5 V after pwr on?
Change N100
NO
NO
YES
YES
YES
NO YES
YES
YES
NO
YES
YES
2
3
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?
NO
YES
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
YES
YES
YES
NO
NO
NO
NO
NO
NO
2
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
3
MBUS registration OK?
Display: selftest failed?
D253/EEPROM
/pin 27/EROMSELX pulses
+5 to 0 V during r/w
action?
Check D300 NO
NO
4
/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
NO
YES
YES
YES
YES

P.A.M.S.
Technical Documentation
NME–2A
Troubleshooting Instructions
Page 9
Original 08/97
Flash Programming OK; part 4
4
D251/FLASH
YES
NO
/pin 11 +12 V during
programming?
D250/MCU
/pin 64/RXD2 pulses
during programming?
Check X100/pin 14
R271, L250, R264
NO
NO
YES
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
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
OK
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
NO
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
NO
NO
YES
YES
NO
NO
YES Check
V102, V103,
V104, R109,
R110, R111,
R113, R133,
R134, C100
change N101
C112, C124
R143, V107
R100, R124