Troubleshooting - B&K 13790 1104 User Manual

56
PROBLEM
No sound
Display will not
illuminate.
No sound
Unit display will
illuminate.
Loud hum or buzz on
one or more channels.
Channel sounds "bad."
Remote / Keypad / IR
sensor(s) will not work.
Surround speakers are
not very loud in
SURROUND mode.
Unit is locked
No component video
S-Video and Composite
video not visible when
using DVD player.
Preamplifier is not
recognizing multi-
channel bitstreams.

TROUBLESHOOTING

TROUBLESHOOTING
POSSIBLE CAUSE
1. Power cord not plugged in.
2. Power off at AC source.
3. AC power inlet fuse blown or
faulty.
4. Power switch in off position (out).
1. Preamplifier is in mute.
2. Volume control to a minimum.
3. Un-used source selected.
4. Line stage or source not correctly
connected.
5. Speaker fuse blown.
1. Poor ground connection in the
interconnect cables.
2. Poor AC ground in main AC supply
3. Audio cables installed across AC
power.
1. Batteries dead, missing, installed
wrong.
2. IR lock is enabled
3. IR inference.
4. Using the wrong IR code-set.
5. Wires are crossed
1. Normal operation.
2. Speaker channels may not be
turned on.
1. Poor power supply
2. Processor lockup
1. Component video input is not
assigned.
1. DVD player set to progressive
scan.
1. DVD player needs to be config-
ured for digital output.
POSSIBLE SOLUTION
1. Reconnect power cord.
2. Check AC switch or fuse.
3. Check AC line fuse, replace line fuse with
.5A 250V Fast Blow fuse.
4. Push in the main power switch.
1. Un-mute the preamplifier .
2. Turn up volume.
3. Select an active source.
4. Check ALL connections. Try substituting
cables.
5. Check all speaker fuses and replace if blown.
Replace fuse with same type and value.
1. Check all connections making sure that
cables are connected (+) to (+) and (-) to (-).
2. Check all cables and repair where necessary.
3. Reposition cables, bundle like cables
together.
4. Try substituting cables.
1. Check and replace batteries.
2. Unlock IR sensor, see Advanced Security
menu.
3. Check for nearby sunlight, plasma TV's or
fluorescent light. Block where needed.
4. Check zone assigned IR code-set.
5. Check wiring diagram on
1. When in SURROUND Mode, most audio
information is directed to the center channel.
Surround and back channels are used for
"effects" scenes.
2. Check speaker setup
1. Check AC power.
2. Cold boot (power switch) or reset the unit.
1. Assign the component video to the appro-
priate source input.
1. Progressive scan (480p) can only be viewed
using component video.
2. Reset DVD player to interlaced (480i).
1. Go into the DVD players setup menu and
turn on the appropriate digital output.
page 21.
page 25.