Print Date 08/04/14 Page 21 of 34 S79005-00MA-05
0.25A Hold
RXEF 60V
Resettable Fuses
Two
For protection of the two fan cooling
units.
If the fuse goes high impedance,
the fan, which it supplies, will not
operate and the FANS display on
the front of the E2026 Drive
Changeover/Output Monitor Unit
will go from green to red.
On Bus Boards inside top rear of
Transmitter.
Note this fuse will automatically reset if
the front panel Disconnector switch is
temporarily set to ‘off’ (i.e. to ‘O’) or if the
Fan Unit is temporarily disconnected
from the Bus Board.
3A Hold
RUE 30V
Resettable Fuse
One only.
For internal protection of E2023
Controller unit.
If the fuse goes high impedance,
the E2023 front panel displays will
all go out and any automatic control
will cease.
Inside E2023, on rear Interface Board.
Note this fuse will automatically reset if
the front panel Disconnector switch is
temporarily set to ‘off’ (i.e. to ‘O’) or if the
E2023 is temporarily disconnected from
the Control Bus Boards at both sides of
the rear of the Transmitter.
1A (T) HBC
5x20mm Fuses
One only on –07
and –08 variants
For protection of +48v DC supply
output lead and circuitry intended
for
connection
to
ancillary
equipment.
At the bottom left rear of the Transmitter,
the smaller fuseholder adjacent to the
associated DC output socket. FS6
! CAUTION ! this is a high energy
circuits and thus care must be taken
if replacing the fuse with power on.
2.3.2 Output Power Level and Frequency Adjustment
If the Transmitter is not supplied with preset output power levels and frequency, its front panel HIGH
POWER and LOW POWER controls and the Exciter/Drive(s)’ power output and frequency will need to
be set. The manuals for the type of Exciter/Drive(s) supplied or in use must be consulted for
information on how the settings required of them are actually made.
The procedure is as follows :
1) Ensure the Transmitter has been installed as detailed in sections 2.1 and 2.2. and that the
E2026 Drive Changeover/Output Monitor front panel switches are set to MUTE and either
SELECT A or SELECT B (i.e. not AUTO).
2) Disconnect both E2021 Amplifier modules by releasing their front mechanical locks and pulling
them slightly forward.
3) Apply power to the Transmitter (i.e. ensure supply distribution 10A MCB(s) is/are on and the
front panel Disconnector switch is at ‘ON’.
4) Ensure all displays are on red, green or amber (except disconnected E2021s) else follow fuse
checking procedure as detailed in section 2.3.1 (fault finding may be required if this occurs).
Check Exciter/Drive(s) are operating.
5) Check the E2026 INTERLOCK/EXT MUTE display is green (if red ensure the safety interlock
link at the rear of this unit is made).
6) Set the Exciter/Drive(s) power output to minimum (which must be less than 13W) and
frequency to that required.
7) Reconnect both E2021 Amplifier modules ensuring their mechanical locks are remade and
ensuring all their displays come on at red, green or amber – if not, again check fuses.