user manual
TFS-780
TFS-780 user manual
Page 50
MAINTENANCE
Gaining Access
Before beginning to remove any of the outer cover plates, please ensure that the amplifier
has been switched off for at least ten minutes to ensure all internal high voltages have
discharged. You must be reminded that there are potentially lethal DC voltages within this
unit and great care must be exercised.
To reach the supply fuses it is necessary to remove both the amplifier top cover plate. The
cover is secured with special flanged M4 machine screws. When replacing, take care not to
overtighten them as they will bind and be very hard to remove. The fuse holder caps are
clearly visible at the rear of the central bulkhead.
To withdraw one of the amplifier modules
Remove the M3 nut which clamps the retaining bracket. Lift the module and move it
forwards. The module can then be lifted out. Remove the connectors from the module.
Cleaning
The amplifier's faceplate can be cleaned with a soft cloth and any non-abrasive cleaning
solution. We recommend you unplug the unit before cleaning.
Routine Checks
Apart from ensuring the filter is not clogged there are no periodic
tune-up
adjustments. The
TMC amplifiers will go on providing their rated performance until the parts fail from old age.
If a fault develops, servicing should be referred to TUBOSOUND LTD or your local,
authorised dealer.
Cleaning heatsinks
To clean the copper heatsinks, either use an airline to blast the dust out, or in the event of
severe contamination with residues from cracked oil smoke machines, an ultrasonic cleaning
bath filled with a suitable solvent (refer to TURBOSOUND LTD for advice, as an incorrect
solvent could cause irreparable damage to the electronics).
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