No Acoustic Line Monitor - Oki OKIOFFICE44 Service Manual

7.1.16 No Acoustic Line Monitor

There are two source routes of acoustic line monitor:
(a) General communication signal
(b) DP pulse signal
MONITOR VOLUME
(Function program No. 06)
MONITOR CONTROL
(Technical function No. 02)
has been set to OFF?
Connect oscilloscope probe
across CN8-01 (SP) and
The signal appears?
received normally?
Replace R44 Board.
Signal route (R):
CN10-A6, B6 IC12-1 (RM)
TR1-2 IC11-1 IC11-3
IC5-5
Troubleshooting
Start
No
has been set to
LOW or HIGH?
Yes
Yes (OFF)
No (ON)
CN8-02 (AG).
Yes
No
No
A message can be
Yes
7 - 24
Set MONITOR VOLUME
to LOW or HIGH.
Set it to ON.
Replace the speaker.
Go to 7.1.9.
(Reception problem)
Service Manual, P/N 59276801
OKIOFFICE 44