5
English –
Transmitter Battery Installation
1. Slide the transmitter POWER ON/OFF switch to the OFF
position.
2. Press down on the OPEN side of the battery compart-
ment cover, slide it back and flip it open, as shown in Fig-
ure 11.
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FIGURE 11
3. Insert a fresh 9V alkaline battery into the battery compart-
ment as shown in Figure 11 (Duracell MN1604 recom-
mended and included with the system). A fresh 9V alkaline
battery should typically provide 18 hours of performance
time. A fully charged 8.4V NiCad battery should provide
2 hours of performance time.
When the red LOW BAT-
TERY light on the transmitter glows, you have 1 hour or
less of useful battery life remaining; change the battery
at your first opportunity.
IMPORTANT: Carbon-zinc and zinc-chloride batteries will not
provide adequate power and are not recommended.
4. Replace the battery cover.
Transmitter audio gain adjustment
FIGURE 12
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The transmitter audio gain control has been factory preset to
provide satisfactory output. However, if the PEAK light on the
T88 receiver is constantly on or never on, the transmit audio lev-
el may require adjustment. Use the gain controls as follows to
adjust the equipment for the best sound quality.
To adjust the audio gain, locate the transmitter audio gain con-
trol and use the supplied screwdriver to adjust the control.
•
If the PEAK light is always on, decrease the audio gain by turn-
ing the gain control counter-clockwise (while the vocalist is
singing or the musical instrument is being played) until the
PEAK light on the receiver flickers only occasionally.
•
If the PEAK light is never on, increase the audio gain by turning
the gain control clockwise (while the vocalist is singing or the
musical instrument is being played) until the PEAK light on the
receiver flickers only occasionally.
TIPS AND TROUBLESHOOTING
Tips for getting the best performance
•
Maintain a line-of-sight between the transmitter and receiver
antennas.
•
Keep the receiver and antennas away from large metal ob-
jects.
•
Avoid placing the receiver near computers or other RF gener-
ating equipment.
•
Point the receiver antennas straight up.
•
Avoid placing the receiver in the bottom of an equipment rack
unless the antennas are remotely located.
Troubleshooting
Some common problems and their solutions are identified in
the table below. If you are unable to solve a problem, contact your
dealer.
Problem
Solution
No sound; RF light(s)
not glowing.
•
Make sure the transmitter
POWER switch is ON and the re-
ceiver is plugged into a power
source.
•
Check battery.
•
Check receiver squelch setting.
•
Check receiver antenna connec-
tion(s).
•
Make sure antennas are in line of
sight of transmitter.
No sound; RF and Audio Level
meter lights glowing.
•
Turn up receiver audio VOLUME
control.
•
Check for proper connection be-
tween receiver and karaoke unit.
•
Talk into microphone and ob-
serve receiver audio level lights.
If they glow, the problem is else-
where in the sound system.
Received signal is noisy or con-
tains extraneous sounds with
transmitter on.
•
Check battery.
•
Remove local sources of RF inter-
ference.
•
If using a guitar or other instru-
ment, check connections.
•
Two transmitters may be operating
on the same frequency. Locate
and turn one off.
•
Signal may be too weak. Reposi-
tion antennas. If possible, move
them closer to transmitter.
Noise from receiver with trans-
mitter off.
•
Adjust receiver squelch control.
•
Remove local sources of RF inter-
ference.
•
Reposition receiver or antennas.
Momentary loss of sound as
transmitter is moved around
performing area.
•
Reposition receiver and perform
another “walkthrough” test and
observe the RF indicators. If au-
dio dropouts persist, mark these
“dead spots” in performing area
and avoid them during perfor-
mance.
