Samsung OFFICESERV 7100 Service Manual page 128

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3.4.6.5 Call cannot be Connected or There is Noise during a Call
The procedure for resolving the problem that occurs when a call cannot be connected or
there is noise during a call while the LED status of TEPRI2 board is normal is as follows:
Start
4MHz, and FSX are normal?
Yes
If other board is mounted,
a call is connected?
Yes
Each part signal of highway
of board is normal?
Yes
The signals sent to FALC
(U6, U7) are normal?
Yes
End
3-34
No
Replace MP10/11 board
No
Replace MP10/11 board
No
Modify corresponding part
The signals
No
exchanged with
transformer(T2, T3) are
normal?
Yes
No
Replace transformer(T2, T3)
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