LK2 Service Manual
Page11 Copyright © 2000 Linn Products Limited. All rights reserved.
Contents Paul O'Neill
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 in LK2 should be “Slow
Blow” – look for a ‘T’ before the
rating on the fuse. Correct types
are:
100-115V - T3.15A antisurge
220-240V - T6.3A antisurge
Fuse blowing May be intermittent Mains surges Consult an electrician or your
electricity supply company..
Doesn’t power up
or
Powers up
(display LED lit)
but no function.
Possible
distortion or poor
sound quality
May be intermittent Wrong mains voltage for LK2
type – mains voltage is too
high (e.g. 115V unit being
used with 240V mains
supply.)
Check voltage rating on
underside of LK2. If wrong,
transformer will require
replacement. Correct part
numbers are:
MCAS 001/100 for 100V mains
MCAS 001/115 for 115V mains
MCAS 001/220 for 220V mains
MCAS 001/240 for 240V mains
Our stock of these transformers is
very limited, so it may not be
possible to supply the part you
require.
Fuse blowing May be intermittent
but usually constant
Transformer faulty. To check
if it is definitely the
transformer, power down the
unit, replace fuse, disconnect
the transformer output from
the Main board and power
up. If the transformer IS the
cause, the fuse will continue
to blow. If the fuse remains
intact, the fault is more likely
to be on the board.
Replace transformer. Correct part
numbers are:
MCAS 002/100 for 100V mains
MCAS 002/115 for 115V mains
MCAS 002/220 for 220V mains
MCAS 002/240 for 240V mains
Our stock of these transformers is
very limited, so it may not be
possible to supply the part you
require.
Fuse blowing Constant Bridge rectifier diode on
amplifier board faulty
(probably internally short
circuit). These are the four
large diodes which can be
found on the underside of
each amplifier board, under
the big capacitors Try
measuring across all four
with an ohmmeter – if one
has an internal short circuit, it
should be quite obvious.
Replace faulty bridge rectifier
diode(s)
Part details: MR752 6A 200V
Rectifier diode (Linn Part no:
MISS 010)
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