18
th
August 1999
Valhalla Service Manual
Page5
Copyright © 1999 Linn Products Limited. All rights reserved.
Power-up problems
Important – Do not carry out any work on or near the Valhalla while it is powered up before reading
the ‘
Please note - It is very important to differentiate between “powering up” and “switching on” the Valhalla. We
define “powering up” as plugging the Valhalla to the mains (if the Valhalla is connected to mains it is
powered up). “Switching on”, on the other hand comprises of pressing the switch on the LP12 to start the
platter turning.
This section deals with Power up only – Switch on is dealt with in the ‘Switch on’ section later.
Power up problems
Symptom
Circumstances
Possible Cause(s)
Cure
Won’t power up
at all
Constant
Fuse blown in unit and/or in
mains plug.
Replace fuse(s) with correct
value & type.
Fuse in mains lead should be 5A.
Fuse fitted to Valhalla should be
1Amp
Won’t power up
Constant
Fuse on Valhalla is missing
or in wrong location (e.g.
Valhalla is wired for 115V but
fuse is positioned at 240V
location)
Ensure fuse is fitted and is
located correctly e.g. if used at
240V, locate in 240V location etc.
Won’t power up
May be intermittent
Mains lead faulty or
incorrectly wired
If you suspect a problem with the
mains lead or its connections at
either end, DISCONNECT FROM
MAINS IMMEDIATELY and
carefully check all connections. If
cable is faulty, replace it – do not
attempt to repair.
Won’t power up
May be intermittent
Valhalla is wrongly wired for
Mains supply being used –
i.e. mains voltage is too low.
(e.g. a Valhalla wired for use
with 240V mains being
connected to 115V 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.
Won’t power up
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 the Bridge rectifier
– BR1, 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.
