B&K ST1400 - Manual (Page 11)

@ CTRL IN Button position Output status @ CTRL OUT
Signal OUT Sound Signal
Signal IN Sound Signal
No Signal OUT Mute No Signal
No Signal IN Sound Signal
Troubleshooting
PROBLEM POSSIBLE CAUSE POSSIBLE SOLUTION
No sound
(‘on’ LED not illuminated) 1. Power cord not plugged in.
2. Power off at AC source.
3. AC power inlet fuse blown or
faulty.
4. Control switch in the wrong
position.
1. Reconnect power cord.
2. Check AC switch or fuse.
3. Check for shorts or
overloading.
4. Place control switch in
proper position (page 9).
No sound on some or all
selected channels (‘on’
LED illuminated)
1. Speaker leads loose or
faulty.
2. Line stage to amp. cables
loose, or faulty.
3. Source to line stage cables
loose or faulty.
4. Line stage or source not
correctly selected.
1. Tighten, repair, or
replace cable
2. Tighten, repair or replace
cable
3. Tighten, repair or replace
cable
4. Check all switch settings.
Sound lacks direction,
bass weak 1. Speakers connected out of
phase.
1. Check connections
making sure that cables
are connected {+) to (+)
and (-) to (-).
Loud hum or buzz on one
or more channels 1. Poor ground connection in
interconnect cables.
1, Check all connectors and
repair as necessary.
Low output from amplifier 1. Balanced switch in balanced
mode when using
unbalanced inputs.
1. Put balanced switch in
correct position.
Channel sounds distorted
and low in output 1. Blown rail fuse. 1. Replace blown rail fuse
inside amplifier.
** Note: If unit continues to blow power inlet fuses, DO NOT USE A HEAVIER
FUSE!!, have it serviced.
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