7-23
15
Buzzer does not sound.
a. Defective buzzer circuit.
Problem
Check Item
Cause
Remedy
Repair
See
Section
a. Defective
buzzer circuit
Are 4kHz pulses output from
DV0 (20 pin) on main
CPU#1?
Defective main CPU#1.
Replace Main PCB
assy.
Replace
CPU#1.
3.3.3
Are correct voltages applied
across buzzer BZ1?
Defective resistors R82
and R83.
Replace Main PCB
assy.
Replace R82
and R83.
3.3.4
3.3.5
Buzzer BZ1 does not sound?
Defective buzzer BZ1.
Replace Main PCB
assy.
Replace BZ1.
3.5.1
Summary of Contents for LX-200
Page 1: ...SERVICE MANUAL MODEL LX 200 LX 900 LX 910D REVISED EDITION May 2000 ...
Page 4: ...Chapter 1 SPECIFICATIONS ...
Page 8: ...Chapter 2 MECHANISMS ...
Page 18: ...Chapter 3 DISASSEMBLY PROCEDURES ...
Page 60: ...Chapter 4 REASSEMBLY PROCEDURES ...
Page 107: ...Chapter 5 ELECTRONIC CONTROLLERS ...
Page 128: ...Chapter 6 MAINTENANCE ...
Page 151: ...Chapter 7 TROUBLESHOOTING ...