Codan 6725-W/E-AC/EX-CE - Figure 25: LNB Fault Diagnosis Chart

Maintenance and fault finding
96 Block Up Converter Systems 6700/6900 series User Guide
Figure 25: LNB fault diagnosis chart
LNB fault
diagnosis chart
Disconnect LNB.
OK?
Check for +15 V DC at
both ends of the Rx IF
cable (Test F)*.
OK?
Does LNB
have an
internal 10 MHz
reference?
Check 10 MHz at both
ends of the Rx IF
cable (Test C)*.
Modem, external
LNB power supply, or
cable faulty. Replace
as required.
LNB faulty.
Replace LNB or
refer to Codan.
Modem, external
10 MHz reference
source, or cable faulty.
Replace as required.
LNB faulty.
Replace LNB or
refer to Codan.
No
Yes
Yes
No
No
Yes