Sunfire TGP-5(E) User Manual

User's Manual

APPENDIX

Check the following: 

• Make sure each speaker's average 

impedance is not less than your 
amplifi ers can safely handle.

• The amplifi ers have good ventila-

tion, no vents are covered.

• Try setting all the speakers to 

Small, and let your subwoofers 
handle the heavy bass.

• Check that the amplifi er power 

output is a good match for your 
speakers. If your speakers are 
ineffi cient, consider using larger 
power amplifi ers.

The TGP-5 is a microprocessor 

controlled device of great complexity. 
Occasional power fl uctuations and 
spikes may cause the TGP-5 to "lock 
up" or act strangely. Often times a 
software problem may be resolved 
by completely powering off the unit, 
waiting 30 seconds and then plugging 
the unit back in. Try this method fi rst 
before using the Full Reset procedure 
described below as follows:

Warning: the TGP-5 will be re-
set to the factory defaults, and 
will clear all memory. All your 

stored OSD settings and Tuner 
presets will be erased.

• On page 57, write down your 

calibration settings, input settings, 
Tuner presets, and any other set-
tings you have made. 

• Press the power button to turn the 

unit off, or turn it off from the wall 
for a moment.

• Press and continue to hold down 

the front panel Power button and 
the Tone DOWN button at the 
same time.

• The TGP-5 will power on and cycle 

through the display. Keep holding 
the buttons down until "Resetting 
to Factory Defaults" appears in the 
front panel display

• When the TGP-5 has been reset, it 

will shut off.

• Turn the TGP-5 back on and it will 

go to the default screen. It has now 
been reset.

• If the TGP-5 has to be reset regu-

larly, you should invest in a good 
quality AC line conditioner.

• See page 51
• If you have a Palm Pilot™ or simi-

lar device with “HotSync™” or its 
equivalent, you may need to dis-
able this software before proceed-
ing. This software ‘seizes’ control 
of a serial port on your machine 
and prevents the Sunfi re software 
from accessing that port. Use an-
other port or disable HotSync.

• Check that the serial cable is con-

nected correctly between the TGP-
5 and your computer's serial port.

This problem is more than likely 

caused by a “ground loop” in your sys-
tem, rather than a fault in the TGP-5. 
Follow these steps to isolate the main 
cause of the hum, there may even be 
more than one.

•  Remember to turn off all compo-

nents in your system, including the 
TGP-5, before disconnecting or 
con nect ing any cables.

• Disconnect the following items in 

order, and check each time if the 
hum has gone away:

•  Disconnect all cables which come 

from outside the room, such as 
cable TV, satellite TV, or roof top 
antennas. Make sure that they are 
dis con nect ed where they fi rst enter 
the room, so they are making no 
con nec tion to the TGP-5 or the TV, 
or any other component. If the hum 
is caused by the cable TV line, 
then you will need a “ground loop 
iso la tor.” This is an inexpensive 
device fi tted in line with the coaxial 
cable feed. Con tact your ca ble 
com pa ny or your Sun fi re Dealer for 
as sis tance.

•  Disconnect all connections from 

the TGP-5 to your TV.

• Disconnect any component which 

has a grounded power cord.

• If the hum persists, disconnect all 

the source com po nents one at a 
time from the back of the TGP-5, 
until you identify the prob lem.

• Ground loop isolators are available 

for audio lines and video. Ask your 
Sunfi re Dealer for assistance.

• Try moving the speaker cables 

away from any power cords. Try 
just one speaker, connecting it to 
different channels and see if an 
amplifi er channel is bad.

• If you are still having a problem, 

remember that Sunfi re’s dealers 
and technical support staff will as-
sist you. 

• Speaker noise may also be caused 

by in ter fer ence or noise on your 
AC line. Make sure there are no 
large ap pli anc es sharing the line, 
or halogen lamps or light-dimming 
Triac devices.

• Try connecting your system to an-

other AC socket on a sep a rate line.

• If the hum is heard from within the 

TGP-5 and not through the speak-
 ers, this may also be caused by 
in ter fer ence on the AC or DC lines. 
The power trans form ers may turn 
this interference into an audible 
noise. Internal hum can be made 
worse by a shelf or cabinet reso-
nating, so try moving the TGP-5 to 
another shelf.

•  Try moving your components further 

away from the TV, es pe cial ly if 
you ever notice the screen has 
changed color in the area closest 
to the component.

• If you have very high effi ciency 

speak ers, these may show up 
noise which other speakers may 
not.