Nokia Ringo2 Troubleshooting
After Sales Technical Documentation
NHN–3N
TROUBLESHOOTING
INSTRUCTIONS
Original, 47/96 NMP Part No. 0275258
Troubleshooting Instructions
After Sales
NHN–3N
Amendment
Number
Technical Documentation
AMENDMENT RECORD SHEET
Date Inserted By Comments
Page 2
Original, 47/96
After Sales
Troubleshooting Instructions
Technical Documentation
1 General
The object of troubleshooting is to define the faulty module block, and then to
locate the faulty component. The troubleshooting diagram has been planned so
that the fault, whatever it is, can be found as simply as possible.
The flow charts 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, go the subbranch.
Required servicing equipment:
– PC for Service Software
– Power supply (2.0A)
– Digital multimeter
– Oscilloscope
– Signal generator
– Spectrum analyzer
NHN–3N
– RF cables
– Service cable SCN–3
– RF–adapter AAT–2N
– Test jig JBS–3N
– RS232/MBUS adapter
2 General Troubleshooting
The General Troubleshooting chart shows the most common fault areas. These
seven fault types can be used to define the possible fault.
Original, 47/96
Page 3
Troubleshooting Instructions
After Sales
NHN–3N
START
Will turn into
local mode ?
OK
Receiver OK ?
(SINAD OK)
OK
Transmitter operating
(RF power OK) ?
Technical Documentation
Logic fault
FAIL
Receiver fault
FAIL
Transmitter fault
OK
Earphone level/
modulation (nom, max)
OK
Is display/keypad
module working ?
OK
OK
FAIL
FAIL
FAIL
Earphone level or
modulation fault
Display or keypad fault
Call set–up faultCall set–up ?
Page 4
END
Original, 47/96
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