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Troubleshooting Guide
The Sherbourn PT-7010A is expertly designed and built
to provide years of trouble-free performance. Most
problems that occur can usually be solved by checking
your setup or making sure that the audio and video
components connected to the processor are on and fully
operational.
The following information will help you deal with common
setup problems you may experience during normal use of
your unit. If problems persist, contact your Sherbourn
Dealer for help.
No Sound (from one or more full range speakers)
• Speaker cables may have come undone. Turn off your
system and check the cables, and tighten the binding
posts.
• An audio cable may have an internal break.
• The volume level is low for the channels concerned.
Recheck the calibration procedure (page 39).
• The Mute switch is on.
• The channel has not been turned on in the Speaker Size
Menu (page 37).
• The correct surround mode is not selected. (Some DVD
discs are stereo only).
Note: In Source Direct mode, only the front left and right
speakers are engaged. They must also be set to Large.
No Subwoofer (or poor output)
• The subwoofer’s amplifier is off or its controls are set
low.
• Are all other speakers set to LARGE in the Speaker
Size menus?
• SUB is not switched on in the Speaker Size Menu (page
37).
• Recheck the calibration procedure (page 39).
• Adjust the Crossover and check Bass Management
(page 40 and 42).
• See page 47 to find the best location for your subwoofer.
• If the bass is weak during Dolby Digital or DTS
playback, check the correct audio output is selected in
your DVD menu, otherwise it may just play stereo into
your PT-7010A and you won’t get the true LFE signal
to the subwoofer.
Poor AM Reception
• Often one of the main complaints about poor AM
reception is that the same AM station can be heard at
different frequencies. Check to see BOTH wires of the
AM loop antenna are connected. A loop antenna is
required for AM reception, as it forms part of the front-
end tuned circuit.
Poor FM Reception
• The antenna may be incorrectly attached.
• Station not correctly tuned in, weak or off the air.
• You can improve reception by using external antennas.
Some cable TV feeds also offer FM reception.
Input Selection Problems
• If you find that certain inputs cannot be selected, check
the INPUTS menu of the OSD (page 36), and make
sure that the input has not been disabled in that
particular Zone.
There is No TV Picture
• Make sure that the video input of your TV monitor is
connected to the Main monitor output on the PT-7010A
rear panel.
• Check that your Monitor is selecting its correct video
input.
• Check the video connection from your selected source
component into the PT-7010A.
• Make sure that you are using the correct video
connections. If in doubt, try connecting the video output
from your source directly to your TV monitor. This
will help you narrow down the problem.
• Use only one type of Component Video, S-Video, or
Composite Video connection on a given input. If more
than one are present at the same time, the PT-7010A
will choose higher quality format and the S-Video and
the Composite Video output will be off in this case.
No Tone Control Functions
• Remember that the tone controls are non-functioning
whenever the PT-7010A is using the 8-CH input, Source
Direct mode, or in Zone 2.
No Dolby Digital or DTS Playback
See page 43
• Look for the Dolby Digital or DTS Logo on the source
program’s box or sleeve. Make sure your player’s digital
output is set to BITSTREAM for Dolby Digital or DTS.
This is often a player’s setup menu item, not the disc’s
menu. Some discs are available with a number of
different options, such as Dolby Digital or Dolby Pro
Logic. Make sure that you have selected the correct
mode from your player’s menu. Only digital inputs will
work for these modes.
• Check that your player’s digital output is connected to
the appropriate corresponding digital input on your PT-
7010A.
• There is no AC-3 RF input connection for Laserdisc
players. You will need an external RF demodulator.
• Check the calibration procedure from time to time. This
is an excellent way of checking that all speakers are
working correctly.