18
th
August 1999
Valhalla Service Manual
Page6
Copyright © 1999 Linn Products Limited. All rights reserved.
Doesn’t power up
or
Powers up
(power LED may
or may not be lit)
but no function.
Intermittent -
tapping or bumping
the unit makes fault
come & go
Bad connection either inside
or outside the unit.
Find and eradicate bad
connection. It may be something
as simple as a connector not
pushed fully home and may be
easily visible. If fault is
intermittent, see the Introduction
to Fault Finding (section on
intermittent faults), which can be
accessed via the Product
Information page of Linfo. If fault
is not intermittent, it may be
possible to trace the fault – again
see Introduction to Fault Finding
– Substitution & Isolation
Fuse blowing
Symptom
Circumstances
Possible Cause(s)
Cure
Fuse blowing
May be intermittent
Wrong type of fuse fitted
Replace fuse(s) with correct
value & type.
Fuse in mains lead should be 5A.
Fuse fitted to Valhalla should be
1Amp
Fuse blowing
Probably random &
sporadic
Mains surges
Consult an electrician or your
power company
Fuse blowing
Probably constant
Valhalla is wrongly wired for
Mains supply being used –
i.e. mains voltage is too high.
(e.g. a Valhalla wired for use
with 115V mains being
connected to 230V mains
supply.)
Check that the Valhalla is
correctly set for mains voltage
being used. If wrong, adjust to
correct mains setting by moving
the ‘Neutral’ (blue) mains
connection and move the fuse to
the correct location.
Fuse blowing
Constant
Bridge rectifier BR1 faulty –
gone short circuit internally.
Replace BR1 – Linn part no:
MISS 032
Fuse blowing
Some
components on
the board (near
the fuse holder)
may be blown
Only affects older
spec Valhallas.
This fault only
occurs if a resistor
is fitted at location
R1 – on later
Valhallas, this was
replaced with a
Surge Guard
Varistor (a round
black component)
Early Valhallas would
occasionally blow if there
was a surge in the mains,
destroying BR1 (the Bridge
rectifier), resistor R1 and the
fuse.
Replace the 3 blown parts –
available as a repair kit – Linn
part no: VAL REPAIR.
Note – the resistor is replaced
with a Surge Guard to prevent re-
occurrence.
Fuse blowing
Probably random &
sporadic
Mains surges
Consult an electrician or your
power company
