Non Operation Of All Modules; Changing A Fuse - Focusrite Red Series Manual

Non Operation of All Modules

Non-Operation of All Modules
Warning: Do not attempt to fix a Red 5 Power
Amplifier - contact your dealer or the factory.
• If none of the LEDs light, check the mains supply:
1. If the module connected to the mains supply?
2. Is the socket switched off?
3. Is the voltage select switch on the back of the unit in
the correct position?
4. Have you switched the module on?
5. If the supply is okay and the module turned on but
no LEDs light, then a fuse has probably blown. See
the section on changing a fuse

Changing a fuse

In most modules there are two fuses inside the module
on the supply side of the transformer. These fuses are
ALWAYS 250 mA anti-surge type: the fuse value does
NOT change when the mains voltage selector switch is
changed, since we fuse each winding separately.
We strongly recommend that you do NOT attempt to
change fuses unless you are absolutely certain that you
know exactly what you are doing. If you are in any
doubt whatsoever, contact your dealer or the factory
before you open the module.
Warning: Do not attempt to investigate fuse failure in a
Red 5 Power Amplifier without first consulting your
dealer or the factory. The fuses in a power amplifier
are the safety device of last resort - all normal mishaps
should trigger shutdown and not blow the fuse. A fuse
failure is serious and almost certainly indicates a major
problem.
To change a fuse in a Red module other than a power
amplifier, if you are certain of your technical ability:
1. Disconnect the mains cable
2. Viewing the module from the front, remove the hex
bolts that secure the left-hand panel. These bolts are
located on the front and rear panels
• If some LEDs light but the unit does not work
properly, check the LEDs:
- The mains switch LED will only light if the ±15V rails
are okay
- The small switch LEDs will only light if the +5V rail is
okay
- The phantom switch LED will only light if the +48V
rail is okay
These LEDs will allow you to see if a power rail has
failed. If a power rail has failed, contact your dealer or
the factory.
3. Carefully remove the left-hand panel, disconnecting
the earthing lead from the chassis by removing the
spade connector
4. Slightly loosen the hex bolts that secure the right-
hand panel. This allows the top cover to slide out
5. Remove the top cover, disconnecting the earthing
lead from the chassis by removing the spade
connector
6. The fuses are in holders to the rear of the
transformer. By shining a torch onto the fuse
holders, you should be able to see which fuse has
blown. To remove the fuse, pull off the top of the
fuse holder, which holds the fuse
7. When you have replaced the fuse, slide the top cover
back into position and check that the bottom cover is
also in position
8. Reconnect the earth lead to the top cover and left-
hand panel, and also check the earth lead
connection for the bottom cover
9. Replace the left-hand panel and secure it with the
four hex bolts
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