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

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6. 6. 6. 6. Common Common Common Problems Problems
Common Problems Problems
No. Failure
1 PWR power supply
indicator lamp not
lightening
2 LOF out-of-frame
alarm lamp lightening
3 LOS data loss alarm
lamp lightening
4 TXD lamp not
lightening
Common Failures and
Common Common Common Failures Failures and Failures and and Solutions
Cause
1.Power supply not properly
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 in wrong
interconnection
2.Optic fiber not well inserted
3.Optic fiber broken
4.Internal circuit damaged
V.35 interface not well
connected or the router etc. not
turned on.
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MODEL7304 User Manual
Solutions
Solutions Solutions
Solution
1.Check power switch
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.
1. Correct the connection
2. Insert the SC connector in place
3. Check optic cable
4. Returned to the manufacturer for
repair.
1. Check the connecting line and
terminal device
and jack