Troubleshooting; Care And Cleaning - B&K ST125.1 Owner's Manual

PROBLEM POSSIBLE CAUSE
No sound ('on' LED 1. Power cord not plugged in.
not illuminated) 2. Power off at AC source.
3. AC power inlet fuse blown or faulty
4. Control Input not activated.
No sound on some 1. Speaker leads loose or faulty
or all selected 2. Line stage to amp cables loose or
channels ('on' LED
illuminated) 3. Source to line stage cables loose
4. Line stage or source not correctly
5. Speaker fuse blown
Sound lacks 1. Speakers connected out of phase
direction, bass
weak
Loud hum or buzz 1. Poor ground connection in inter-
on one or more
channels
Channel sounds 1. Blown rail fuse
distorted and low
output
* *Note:
If unit continues to blow power inlet fuses,
FUSE,
please contact customer service to have the unit serviced.
Under normal use, the amplifier will not require any special care. Over time you may wish to clean the exterior of
the unit by wiping it with a damp cloth to remove any dirt or dust that accumulates on it. Unplug the amplifier and
be sure that it has completely powered down before you apply any damp cloth. Do not let any liquid enter the
amplifier through the vents in the top cover. REMEMBER, LIQUIDS CONDUCT ELECTRICITY!!! You may clean
the connectors on the back panel with isopropyl alcohol annually.

TROUBLESHOOTING

faulty
or faulty
selected
connect cables

CARE AND CLEANING

POSSIBLE SOLUTION
1. Reconnect power cord.
2. Check AC switch or fuse
3. Check for shorts or overloading
4. Supply Control IN with a 5-24 Volt AC or DC
supply (Page 8)
1. Tighten, repair or replace cable
2. Tighten, repair or replace cable
3. Tighten, repair or replace cable
4. Check all switch settings
5. Check all speaker fuses
1. Check all connections making sure that
cables are connected (+) to (+) and (-) to (-)
1. Check all connectors and repair as
necessary
1. Replace blown rail fuse inside amplifier.
DO NOT USE A HIGHER RATED
9