Troubleshooting Diagram Of The Buzzer - Nokia 9000i Service Manual

After Sales
Technical Documentation
4

Troubleshooting Diagram of the Buzzer

The functionality
The buzzer test tests the timer controls along with some other internal
functions of the CPU.
4.1 Beep the Buzzer
To beep the buzzer, choose the buzzer test in the service software. Give
the desired frequency and the duration.
Original, 05/97
of
the buzzer can be checked with the Service Software.
0.
Start
1.
Beep the Buzzer
2.
Sound
NO
OK?
YES
Buzzer
OK!
Faultfinding/Disassembly
2.1 Disconnect
SIM–flex
2.2 NO
SPKR (pin 124)
YES
2.3 NO
BUZZEROUT
OK?
YES
2.4 NO
SIM–flex OK?
YES
2.5
Buzzer fault
RAE/RAK–1N
2.2.1
CPU
fault
2.3.1
Check
Driver
Circuitry
2.4.1
SIM–flex
fault
Page 8 – 29