BSS Audio
FCS-930/960 User Manual v3.0
Page 12
9
.2 Transient suppressor replacement
The primary of the mains transformer within the FCS-930/960 is protected against
high voltage spike interference by two voltage dependent resistors. These provide a
short circuit to voltage peaks in excess of their maximum rating.
Should the FCS-930/960 be inadvertently connected to 3 phase line/line voltages,
or to 240V when selected to 120V, or any other incorrect voltage, these
suppressors are likely to fail in a protective short circuit mode. This will be
demonstrated by repeated mains fuse failure when powering up the unit.
Even in this case of extreme overvoltage, the FCS-930/960 are protected against
failure, and the simple removal of these suppressors will allow the unit to be used
again. However, it is important that they are replaced as soon as possible to ensure
continued protection. Ensure that the mains power is disconnected from the unit
before the lid is removed, and the suppressors are removed.
9
.3 Optional balancing transformer fitting
Provision is made internally to fit balancing transformers to both the electronically
balanced inputs and outputs (Refer to the spare parts information sheet for
reference codes for these transformers).
The transformers are easily fitted onto the printed circuit board adjacent to the
respective output connectors. Please ensure correct orientation and removal of
links:
LINK REMOVAL
CHN 1
CHN 2 (FCS-960 only)
INPUT TX
1, 2
7, 8
OUTPUT TX
3, 4
5, 6
!!! WARNING - Refer all servicing to qualified service personnel !!!
Risk of electric shock if the unit is opened.
BSS Audio accepts no responsibility for injury
subsequent to opening of the unit.
