Samsung OFFICESERV 7100 Service Manual page 133

3.4.7.3 When the Tone Is Not Heard
The method to solve the problem when the tone is not heard in the 8COMBO port is as
follows:
Check the voltage between TIP-RING.
Is the voltage -30 V or more?
Yes
Check if the HOS signal
becomes ACTIVE in SMC.
Is HOS detected?
Yes
Check if the tone signal is generated
in the PIN3 of CODEC.
Is the tone generated?
Yes
Check or repair the SBS9401 output.
Is the time slot signal generated?
Yes
Is the signal generated
from HWR?
Yes
Replace CODEC.
© SAMSUNG Electronics Co., Ltd.
- Repair the power supply part.
No
- See descriptions of '4.5.2 When the
Power Is Not Supplied'.
No
Replace surrounding circuits of TR.
No
Check if the time slot signal is
generated from PIN5/12 of CODEC.
- Check or repair ADDRESS BUS,
No
DATA BUS.
- Replace SBS9401.
No
Repair the highway of the MP40
board and the mother board.
OfficeServ 7100 Service Manual
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