Nokia 232N Service Manual trouble
After Sales Technical Documentation
THA–4S
TROUBLE SHOOTING
GUIDE
Original, 12/95
NMP Part No. 0275180
THA–4S
After Sales
Troubleshooting Guide
AMENDMENT RECORD SHEET
Amendment
Number
Technical Documentation
Date Inserted By Comments
Page 2
Original, 12/95
After Sales
THA–4S
Technical Documentation
Troubleshooting Guide
TROUBLESHOOTING GUIDE
CONTENTS
Introduction 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Faults 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Faults 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Logic Faults 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver Faults 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitter Faults 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Display / Keyboard Faults 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Setup Faults 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Earphone / Modulation Faults 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page No
Original, 12/95
Page 3
THA–4S
After Sales
Troubleshooting Guide
Introduction
The following pages in this guide contain useful flow charts designed to
assist with system faultfinding.
General Faults
STAR T
Off Current
consumption >
0.5mA
Y
Will turn into
local mode
N
Technical Documentation
DC Fault
N
Logic fault
Y
Receiver O.K
Y
Transmitter O.K
Y
Earphone
level/modulation
OK
Y
Display/keypad
working
N
N
N
N
Receiver fault
Transmitter fault
Earphone
level/modulation
OK
Display/keypad
fault
Page 4
Y
Call set–up
Y
END
N
Call set–up fault
Original, 12/95
Loading...