OfficeServ 7100 Service Manual
© SAMSUNG Electronics Co., Ltd.
3-27
3.4.5.2 C.O. line Call cannot be Originated
The procedure for resolving the problem that occurs when C.O. line call cannot be
originated is as follows:
Yes
Yes
Yes
No
Check the power after disconnecting
the C.O. line from the board.
No
Yes
Yes
Check if RELAY control
signal is normal.
No
No
No
Check if the absolute power
between TIP-RINGs exceeds 30 V
in the hook-on status.
Replace C.O. line loop HYBRID.
Replace RELAY.
Repair the C.O. line.
Replace TMC
(LINE1~4: U5, LINE 5~8: U6)
Replace TMC
(LINE1~4: U5, LINE 5~8: U6)
Is the power normal?
When the C.O. line is occupied,
check if RELAY operates by sound.
RELAY operation is normal?
HOS is HIGH?
Power between TIP-
RINGs exceeds 30 V?
Check RELAY control signal.
HOS signal is HIGH?
Содержание OFFICESERV 7100
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