REI system 2000, Техническое руководство, Страница: 82 / 98

Form: 640188
TS-7
System 2000 Troubleshooting Chart
-Video -
PROBLEM POSSIBLE CAUSE CHECK / SOLUTION
No power, all Monitors
. Monitors
blank, green LED on the rear panel
off.
Video System not
activated. Activate the Video system via the
button labeled VIDEO on the
Control Head (700227). Display will
indicate "VID".
No power to Video relay, or
wired incorrectly. Verify power connections to relay
and any external current protection
devices, ie fuses or circuit breakers
Defective Video relay Activate the Video System via the
Control Head. Measure the Voltage
on both sides of the Video relay's
coil. The side connected to the
(510566) cable, orange wire, should
measure approximately 0 Volts. The
opposite side should measure power
(+12 or +24V depending on relay
used). Relay should energize. If
these voltages are present but the
relay does not energize, replace the
relay.
Defective or improperly
wired Control Head
(700227) Verify that the orange wire (from
510566 cable) is connected to the
relay coil. Activate the Video
System (as previously described).
Measure Voltage levels at the relay
coil. If the orange wire does not
measure near 0 Volts (less than 1V),
and all other connections are correct,
replace or repair the Control Head
(700227).
Power wire from Video relay
to monitors defective If power is being switched by the
relay, verify that it is also present at
the parcel racks, were the monitors
connect to it. If not, repair or replace
power wire.