BSS Audio FPC900r, User Manual

Page: 68 / 78

VARICURVE
6 8
TM
S Y S T E M
The primary of the mains input transformer on the 900i Interface is
protected from high voltage spike interference by two voltage
dependent resistors (VDR). These provide a momentary short circuit to
voltage peaks in excess of the normal voltage rating.
Should your unit be inadvertently connected to three phase line/line
voltages, or to 240v when selected for 120v, or any other incorrect
voltage, these suppressors are likely to fail in a short circuit mode. This
will be demonstrated by repeated mains fuse failure at switch on.
Even in this case of extreme overvoltage the unit is 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.
The two VDRs are mounted on the small circuit board LVS300,
attached to the rear of the 120/240v selector switch. They are specified
as Philips 2322-594-61312 (Max voltage 130v).
WARNING! Ensure the unit is disconnected from mains power before
attempting removal.
20.0 Appendix
Transient Suppressor Replacement
20.1 Transient
Suppressor
Replacement
The base of the 900r remote is supplied with four fixing holes for an
Omnimount adaptor. The adaptor should be fitted with four M4 screws
of
maximum length 6mm otherwise internal damage will result.
Omnimount parts are available from Canford Audio in the UK (+44)
(0)91 415 0205
Canford Part no.
Omnimount clamp 50ST 18-532
Mic stand adaptor ( 5 /
8
"-27tpi- US) 5000MA 18-782
For Europe a 5 /
8
" to 3 /
8
" Whitworth insert
is required in addition to the adaptor. 53-217
20.2 Microphone
Stand Adaptor
Spares Ordering