Common Common Common Problems Problems - 3One data 7304 User Manual

6. 6. 6. 6. Common Common Problems
Common Common Problems Problems Problems
No. Failure
1 PWR power
indicator lamp
lightening
2 LOF out-of-frame
alarm lamp lightening
3 LOS data loss alarm
lamp lightening
4 TXD lamp
lightening
Common Common
Common Failures Common
Cause
supply 1.Power supply not properly
not connected
2.Protector tube damaged
3. -48V DC input tie-line in
reverse connection
4.Internal power supply circuit
with failure
1.Optic interface not clean
2.Optic fiber not well inserted
3.Wrong clock setting
4.Time slots of the devices at
two ends not conformance
5.Internal circuit damaged
1. Optic fiber
interconnection
2.Optic fiber not well inserted
3.Optic fiber broken
4.Internal circuit damaged
not V.35 interface
connected or the router etc. not
turned on.
Failures Failures and and Solutions Solutions
Failures and and Solutions Solutions
Solution
1.Check
2.Replace protector tube 3.Correct -48V
power supply line connection
4.Returned to the manufacturer for
repair.
1. Clean the connector of optic interface
2. Insert the SC connector in place
3. Refer to the description on rear panel
4. Returned to the manufacturer for
repair.
in wrong 1. Correct the connection
2. Insert the SC connector in place
3. Check optic cable
4. Returned to the manufacturer for
repair.
not well 1. Check the connecting line and
terminal device
Page 11 of 11
MODEL7304 User Manual
power switch and jack