Better Solutions Are Within Reach
TM
MODEL NUMBER:
PDI-772HE
Document Number:
PD196-038R2
10 Tap AC Central Power Supply
Page 3 of 4
PDi Communication Systems, Inc. 40 Greenwood Lane Springboro, Ohio 45066 USA PH 1-800-628-9870 FX 937-743-5664
FAULT
CORRECTIVE ACTION
TV picture noisy
on all TVs.
1. At the central power supply, remove the
input RF cable and check the signal level.
The central power supply requires a
minimum RF level of +20 dbmv for a
healthy RF signal level at each TV.
2. At the central power supply, remove the
output coax and check the signal level at
each “F” output. With a know RF input
signal level to the central power supply “RF
IN”, check for an insertion loss of 14 dbmv
at each “F” output. Any insertion loss
greater than 14 dbmv indicates a fault.
Remove from service and replace with a
know good working central power supply.
TV picture noisy
on one TV.
1. At the TV, open the cover on the support
arm. Slide the rubber boot and expose the
“F” barrel connection. Disconnect the “arm
side” coax and verify an RF signal level
equal to or greater than 0 dbmv. Caution
AC voltage is present on the coax during
this measurement. If the signal level is less
than specified check for coax wiring faults.
2. If the signal level is greater than 0 dbmv,
replace the “F-61” barrel connector and
check the TV’s picture.
3.
If the TV’s picture is noisy, replace the TV.
