No Signal; No Leds Illuminated Or No Fans; Overvoltage Led Lit; Standby Led Remains Illuminated - AE Techron 7224 Operator's Manual

8.3 No Signal

Missing Output signal may be caused by one of
the following:
1. Master/Slave Jumpers are set to the Slave
(down) position. The amplifier should only be
configured for Slave mode if it is in a multi-ampli-
fier system; otherwise it should be set for Master
mode. See the "Advanced Configuration" sec-
tion in this manual for more information.
2. Signal is not connected to any inputs on the
SIM card. See the "Amplifier Setup" section
in this manual for more information.

8.4 No LEDs Illuminated or No Fans

If none of the LEDs on the Display Panel are il-
luminated and/or the fans are inoperative, check
the following:
1. The AC mains are not connected or not on
(see the "Amplifier Setup" section for more
information).
2. Front Panel Breaker/Switch has been tripped.
Reset by turning the unit Off (O) and then On.
3. Fuse F1 is open.
To Inspect Fuse F1 follow these steps:
1. Turn Off (O) the amplifier and disconnect the
AC mains.
2. Remove Access Panel (see "Advanced Con-
figuration").
3. Locate Fuse F1 (see Figure 8.2). Remove fuse
and inspect. Replace, if necessary, with same
type fuse (T1.6A L 250V).

8.5 OverVoltage LED Lit

The amplifier will protect itself from AC mains volt-
age that is 10% above the voltage indicated on
the back panel. If the AC mains voltage is more
than 10% above the operating voltage, reduce the
AC mains voltage to the proper level. When the
line voltage condition is corrected, the amplifier
will automatically reset. If the amplifier does not
automatically reset, the amplifier's three internal
transformers may need to be rewired. Please see
Section 8.9 for Factory Service information.
40

8.6 Standby LED Remains Illuminated

The Standby indicator may remain illuminated
under three conditions:
1. If the output wells or power transformer have
overheated. If overheating is the problem, see
the following topic ("Amplifier Overheats").
2. If both the Standby and Ready LEDs remain
illuminated and the Interlock I/O Cable is being
used, the amplifier is being held in Remote
Standby mode by another device (see Figure
8.3). For more information on 7224 Remote
Operation, see the "Applications" section in
this manual.
3. If the connection to the Interlock – I/O Connec-
tor or other input/output connection isn't fully
secure. Check all wiring and connections.
Information subject to change
7224 OPERATOR'S MANUAL – SECTION 8
Figure 8.2 – Fuse F1 Location
Figure 8.3 – Interlock I/O Connector
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