18
continued from
previous page
Fig. 4.1 Main Setup Menu Diagram (continued from previous page)
(
MRC88m / MRAUDIO8X8m require Firmware Ver. 2.03 or later to work
with the MRKP1)
19
5. Troubleshooting
Symptom
Possible Cause
Solution
MRKP1 does not power
up
1. RJ-45 plug crimped
incorrectly; or wiring
pin-out of RJ-45
reversed.
Verify wiring pin-out and
RJ-45 crimp. Correct by
re-crimping RJ-45 to
CAT-5 cable.
2. Break in CAT-5
between Zone and
“Head-End”.
Check RJ-45 to RJ-45
connections with cable
tester or voltmeter.
No control or IR
sources
1. Wiring: Incorrect
wiring between MRKP1
and MRC88m.
Verify and correct
wiring.
2. IR emitter defective
at source.
Replace IR emitter.
Intermittent IR source
control
IR flooding
Check to see if ambient
light is shining on built in
IR receiver or in direct
line with plasma TV
noise. If the IR emitter is
flashing when IR is not
being sent, IR flooding
is likely cause. Disable
the built-in IR Receiver.
Consider use of an
external IR Receiver
(see Fig 2.2 and 3.2).
