Nokia Ringo 3 Troubleshooting Instructions 06
PAMS Technical Documentation
NHX–7 Series Transceiver
Chapter 6
Troubleshooting
Instructions
Original 10/98
NHX–7
PAMS
Troubleshooting Instructions
AMENDMENT RECORD SHEET
Amendment
Number
Date Inserted By Comments
Technical Documentation
Page NS–2
Original 10/98
PAMS
NHX–7
Technical Documentation
Troubleshooting Instructions
CONTENTS
Introduction NS–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction NS–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Logic Fault NS–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver Fault NS–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitter Fault NS–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UI Module Fault NS–9–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Set–up Fault NS–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page No
Original 10/98
Page NS–3
NHX–7
PAMS
Troubleshooting Instructions
TROUBLESHOOTING
The purpose of the 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 by as simple measurements 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,
you have to go the subbranch.
Required servicing equipment:
– PC for Service Software
– Power supply (2.0A)
– Digital multimeter
– Oscilloscope
– Signal generator
Technical Documentation
– Spectrum analyzer
– RF cables
– Service cables
– RF–adapter AAT–7X
– Test jig JSU–7
– RS232/MBUS adapter
Page NS–4
Original 10/98
PAMS
NHX–7
Technical Documentation
Introduction
The General Troubleshooting chart defines the most likely fault categories.
START
Will turn into
local mode ?
Receiver OK ?
(SINAD OK)
Troubleshooting Instructions
Logic fault
OK
FAIL
Receiver fault
OK
Transmitter operating
(RF power OK) ?
OK
Earphone level/
modulation (nom, max)
OK
Is display/keypad
module working ?
OK
FAIL
FAIL
FAIL
Transmitter fault
Earphone level or
modulation fault
Display or keypad fault
Original 10/98
END
OK
FAIL
Call set–up faultCall set–up ?
Page NS–5
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