Nokia 9000i - Troubleshooting Diagram of the Buzzer

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