Williams Sound CFM 300, CFM 400 I F F EEDBACK O, I F I NTERFERENCE O, I F O THER P ROBLEMS O, I F P ROBLEMS R

Williams Sound

Helping People Hear

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IFFEEDBACK OCCURS

1. Do not stand with the microphone directly in front of the speaker. Don’t try to set the

volume while standing with the microphone in the “feedback zone.” Have someone

help you adjust the volume.

2. Place the receiver and speaker as shown in Figure 5. Avoid pointing receivers or

speakers directly perpendicular to a wall.

3. Turn the volume down. Remember, the system is not intended to play loudly. It should

slightly boost the teacher’s voice above normal background noise levels.

4. Turn down the treble control. This will reduce the volume of higher frequencies.

5. Use the MIC 074 Headset Microphone. This bring the microphone closer to the sound

source (the speaker’s mouth) and thus reduces the amount of amplification required to

achieved the desired volume.

IFINTERFERENCE OCCURS

1. Do not try to use more than one transmitter on the same channel in close proximity to

each other.MORE THAN ONE TRANSMITTER ON THE SAME CHANNEL WILL

RESULT IN INTERFERENCE IF THEY ARE CLOSE TOGETHER. Keep the sys-

tems 50 - 100 feet apart or use separate channels for each system used.

2. If you are still hearing interference on the Receivers, turn the transmitter offand listen

with a receiver. If you hear the interference with the transmitter off, you need to

change to a clear channel. See the frequency change instructions elsewhere in this

manual.

3. Make sure that the transmitter and optional personal receivers are tuned to the same

channel. The units have stickers inside the back cover identifying the channel. Unless

the transmitter channel has been changed, set the personal receiver to channel 1.

IFOTHER PROBLEMS OCCUR

1. If the rechargeable batteries will only work for a short period of time (less than 1

hour) even after they are fully charged, they must be regenerated. Leave them in the

transmitter or receiver with the unit turned on for 5 - 6 hours. Then turn the transmit-

ter or receiver off, place it in the charger, and charge for 14 - 16 hours. This should

restore normal battery life. Rechargeable batteries will gradually lose their capacity

over time and should be replaced every year.

2. If you’re using the SoundFocus System with the optional PFM R31 Receiver, make

sure that the earphone has been plugged into the earphone jack and not into the R31

Receiver’s microphone jack.

IFPROBLEMS REMAIN

If none of the remedies above provides the solution, call Williams Sound’s Customer

Service Department at 1-800-843-3544 (8:00 AM– 4:30 PM Central Time).