No Sound From The Speaker - Oki OKIFAX4550 Maintenance Manual

Table of Contents

Advertisement

4.1.10 No sound from the speaker

10: No sound from
the speaker
Monitor or buzzer
buzzer
Pulse wave input is provided
at pin 5 of IC11 when the
key is pressed or the soft
ringer goes
No
Replace IC2.
41309401TH Rev.4
Monitor
Communication normal
No
See sending or receiving NG.
Yes
No
No
Replace IC11.
Yes
Sine wave or modulated
No
wave input is provided at
pin 13 of IC11 during
Replace TR501.
Either pin 9, 10, or 11 of IC11
becomes 5V when the key is
pressed or the soft ringer goes
or during communication
Yes
Sine wave or modulated wave
is input to pin 3 of IC5 when the
key is pressed or the soft ringer
goes or during communication
Yes
Sine wave or modulated wave is
output from pin 5 of IC5 when the
key is pressed or the soft ringer
goes or during communication
Yes
Check CN9.
communication
Yes
No
Replace IC5.
544 /

Advertisement

Table of Contents
loading

This manual is also suitable for:

Okioffice87

Table of Contents