Sli Failures - Samsung OfficeServ 12 Service Manual

3.3 SLI Failures

Failure 1
When No Power is supplied to the SLI port.
Troubleshooting 1
Check the voltage of the tip
and ring.
Are they higher than 40 V?
No
Check if the voltage of pin3 of SLIC.
(795552QC)
Is higher than -40 V
No
Trace -55 V from P992 and repair
the fault.
END
© SAMSUNG Electronics Co., Ltd.
Yes
END
Yes
Check if the voltage of 26, 27.
Is higher than -50 V?
Yes
- Check the relay(e.g., K501), fitter
(e.g., M501), Wattage resister.
(R504, R505)
- Repair the fault.
Replace the
No
SLIC.(Subscriber Line
Interface Circuit)
5