Samsung OFFICESERV 7100 Service Manual page 107

3.3.1.2 Abnormal Internal Music on Hold (MOH)/Background Music Sources
(BGM)
The procedure for resolving the problem that occurs when internal MOH/BGM is abnormal
is as follows. In this case, MOH is set as internal MOH.
Start
Is the communication
between ports normal?
Yes
Are signals generated
properly from PINs of U27?
Yes
Scope if signals
are generated from PIN1 of U28.
Is it normal?
Yes
Check if the corresponding channel
signal of highway TX is generated.
© SAMSUNG Electronics Co., Ltd.
No
Repair the port failed.
No
No
OfficeServ 7100 Service Manual
Replace U27.
Replace U28.
3-13