Williams Sound PFM 174 Guida

Williams Sound ®

Helping People Hear

HEARING HELPER™Personal FM System

Wireless FM Listening System

MANUAL AND USER GUIDE

MAN 107C

Transmitter Models T1-173.400, T1-174.100, T1-174.300, T1-175.500, T1-176.300

Receiver Models R1-173.400, R1-174.100, R1-174.300, R1-175.500, R1-176.300

Models PFM 173 & PFM 174

Williams Sound ®

Helping People Hear

EARING

ELPER

®P

ERSONAL

FM S

YSTEM

, M

ODELS

PFM 173 & PFM 174

INSTALLATION GUIDE & USER MANUAL

CONTENTS PAGE

System Overview 3

System Components 4

Safety Information 5

Recycling Instructions 5

Using the Transmitter 6

Using the Receiver 7

Battery Information 8

Using Your Personal FM System With A Hearing Aid 10

Applications For Various Hearing Loss Levels 11

In Case Of Difficulty 12

Warranty 13

Acoustic Specifications 14

System Specifications 15

Williams Sound ®

Helping People Hear

SYSTEM OVERVIEW

Thank you for purchasing the Hearing Helper™Personal FM System from Williams Sound Corp.

Anyone needing auditory assistance to overcome background noise, reverberation, or distance

from the sound source can benefit from the Personal FM System.

Your PFM System has two principal parts: the Transmitter and the Receiver. Much like a

miniature radio station, the Transmitter and microphone pick up the sounds you want to hear and

broadcast them over an FM radio signal. The receiver and earphone are used to pick up the

broadcast up to 100 feet away.

To avoid difficulties, please read through these instructions as you begin to use the system. Then

save them for questions that arise as you continue to use your Williams Sound Personal FM

System.

Speaker Uses Transmitter

With Microphone

FM Radio Signal

Listeners use Receivers with Earphones, 

Headphones, Or Neckloop

The speaker wears the body-pack transmitter and a clip-on microphone. The speaker’s voice is

broadcast as an FM radio signal over a distance of 100-150 feet (30-45 m). Listeners use the

pocket receiver and earphone or headphone to hear the speaker’s voice directly, with reduced

background noise. A neckloop telecoil coupler allows the system to be used with telecoil

(T-Switch) equipped hearing aids.

FIGURE 1: HOW THE PFM SYSTEM WORKS

Williams Sound ®

Helping People Hear

SYSTEM COMPONENTS

þBody Pack Transmitter with (2) AA batteries (BAT 001)

þLavalier microphone (MIC 090)

þMini earphone (EAR 013)

þSoft Nylon System Carry Case (CCS 020)

þ(2) Belt clip cases (CCS 001)

þInstructions (MAN 107)

þPersonal FM Receiver with (2) AA batteries (BAT 001)

Receiver

Earphone

On/Off &

FM Volume

Williams Sound

Hearing Helper®

Williams Sound

Hearing Helper®

Transmitter

Microphone

On/Off Switch

Mic Jack

Williams Sound

Hearing Helper®

Williams Sound

Hearing Helper®

FIGURE 2: SYSTEM COMPONENTS

Williams Sound ®

Helping People Hear

CAUTION!

SAFETY INFORMATION

HEARING SAFETY

This product is designed to amplify sounds to a high volume level which could

potentially cause hearing damage if used improperly. To protect your hearing and the

hearing of others:

Make sure the volume is turned down before putting on the earphone or headphone before

adjusting the volume to a comfortable level.

Set the volume level at the minimum setting that you need to hear.

If you experience feedback (a squealing or howling sound), reduce the volume setting and

move the microphone away from the earphone or headphone.

Do not allow children or other unauthorized persons to have access to this product.

BATTERY SAFETY AND DISPOSAL

This product is supplied with disposable Alkaline batteries. Do not attempt to recharge

disposable batteries, which may explode, release dangerous chemicals, cause burns, or

other serious harm to the user or product.

PACEMAKER SAFETY:

Before using this product with a pacemaker or other medical device, consult your physician

or the manufacturer of your pacemaker or other medical device.

If you have a pacemaker or other medical device, make sure that you are using this product

in accordance with safety guidelines established by your physician or the pacemaker

manufacturer.

BATTERY SAFETY AND DISPOSAL

Help Williams Sound protect the environment! Please take the time to dispose of your

equipment properly.

Product Recycling for Customers in the European Union:

Please do NOT dispose of your Williams Sound equipment in the household trash. Please take

the equipment to a electronics recycling center; OR return the product to the factory for proper

disposal.

Battery Recycling for Customers in the European Union:

Please do NOT dispose of used batteries in the household trash. Please take the batteries to a

retail or community collection point for recycling.

RECYCLING INSTRUCTIONS

08/18/05

Williams Sound ®

Helping People Hear

USING THE TRANSMITTER

Note: Rechargeable batteries are shipped in a discharged state and must be charged overnight

before using.

1. Make sure there are two charged AA batteries in the transmitter. If batteries are not installed,

see Battery Information on page 8.

2. Plug the microphone cord into the “Mic” jack on top of the Transmitter.

3. Place the Transmitter in the belt clip case provided.

4. Turn the power switch on top of the Transmitter to “On.”

5. Clip the microphone onto a collar, lapel, or tie. It should be as close to the speaker’s mouth

as is practical. (See Figure 4.)

The transmitter can be placed in a pants pocket, or clipped onto a belt or waistband.

Make sure the Transmitter is turned OFF when not in use.

Note On The Transmitter Antenna:

The microphone cord is the transmitting antenna. Do not bunch up the cord or wrap it around the

transmitter. For maximum range, the cord should hang as straight as possible.

Yes Yes No No

The PFM System comes with an omnidirectional, lapel-clip style microphone. It should be clipped to a collar, lapel,

tie, or neckline as close to the mouth as possible and centered on the body as shown.

FIGURE 4: CORRECT MICROPHONE PLACEMENT

Mic

Williams Sound FM

Off On

On/Off Switch

Mic

Jack

ON Indicator

FIG. 3: TRANSMITTER TOP VIEW

Williams Sound ®

Helping People Hear

USING THE RECEIVER:

Note: Rechargeable batteries are shipped in a discharged state and must be charged

overnight before using.

1. Make sure there are two charged AA batteries in the Receiver. If batteries are not

installed, see Battery Information on page 8.

2. Plug the earphone or headphone into the “Ear” jack on top of the Receiver.

3. Turn the power on by rotating the volume control on top of the Receiver.

4. Place the earphone in your ear.

6. Adjust the receiver volume control to a comfortable listening level.

You should be able to hear someone speaking into the Transmitter microphone.

8. Place the Receiver in the belt clip case provided. The Receiver can be placed in a pants

pocket, or clipped onto a belt, harness, or waistband.

Notes:

The earphone cord is the receiving antenna. Do not bunch up the cord or wrap it around the

receiver. For best reception, the cord should hang as straight as possible. Make sure the

Receiver is turned OFF when not in use.

EAR Volume

1On/Off Volume Switch

Headphone Jack

"On" Indicator LED

FIGURE 5: RECEIVER TOP VIEW

Williams Sound ®

Helping People Hear

BATTERY INFORMATION

INSTALLATION

Open the battery compartment using a coin in the slot in the bottom of the receiver or transmitter.

Press the batteries into place, observing proper battery polarity. Incorrect insertion of the battery

is difficult, and if forced, may cause both mechanical and electrical damage to transmitters or

receivers not covered by the five year warranty. Units will not work with the battery incorrectly

installed.

NON-RECHARGEABLE BATTERIES

In normal use, two AA 1.5 V alkaline batteries (BAT 001) will last about 12 hours in the

Transmitter and approximately 30 hours in the Receiver. If the sound becomes weak or distorted,

replace the batteries. Do not leave dead batteries in the receivers. Battery corrosion is not

covered by the Williams Sound five year warranty.

RECHARGEABLE BATTERIES

The Transmitter and Receivers can use rechargeable AA batteries (BAT 026). On an overnight

charge, these NiMH batteries are designed to operate a Transmitter for approximately 8 hours,

and Receivers for 20 hours.

The battery installed in the receiver may be recharged in the receiver only if it is a Nickel-Metal

Hydride (NiMH) battery, and only if a Williams Sound CHG 1600-02 Multi-Charger is used.

Damage from improper charging is not covered by the Williams Sound five year warranty. For

charging instructions, see figure 7.

Important Rechargeable Battery Information

Rechargeable batteries are shipped in a discharged condition. They must be charged for a

complete charge cycle before the first use (approximately 15 hours). Rechargeable batteries will

need to be replaced after 1-2 years of use. Do not dispose of batteries in fire. Do not open

batteries, there are toxic chemicals inside.

+–

Battery 

Compartment

Pry 

Slot

Rear of Transmitter

or Receiver

Note Proper 

Polarity

FIGURE 6: INSTALLATION OF BATTERIES

Williams Sound ®

Helping People Hear

Charging 

Indicators

Charging

Pins

Cord Hook Power Input

Charging

Contact Holes

Step 1: Plug the CHG 200-02’s power supply

into the Power Input on the charger’s

side and a standard AC wall outlet.

Step 2: Route the power cord around the Cord

Hook (see figure at right). This will

minimize strain on the cord and jack and

insure that the power cord is not

detached during charging.

Step 3: Make sure the receivers/transmitters to

be charged are turned OFF.

Step 4: Place the receivers/transmitters in the

slots so that the CHG 200-02’s Charging

Pins and receiver’s side panel contacts

are coupled. Make sure that the charging

contact holes line up with the charging

pins. The receivers should drop easily

into the slots. DO NOT FORCE THEM

IN BACKWARDS.

Step 5: The Charging Indicators will light,

indicating that charging is in process.

It takes 14–16 hours to fully charge the

batteries. Remove the receivers when

charging is completed.

!! WARNING !!

DO NOT ATTEMPT TO RECHARGE DISPOSABLE BATTERIES!

The batteries may heat up and burst, causing possible injury and damage to the equipment.

Avoid shorting the plus and minus battery terminals together with metal objects. Battery damage and

burns can result!

Use only Williams Sound supplied chargers and batteries.

FURTHER SUGGESTIONS

Receivers and Transmitters SHOULD NOT be left charging continuously when not in use.

Receivers should always be turned OFF while charging.

It’s best to allow the batteries to fully discharge before charging.

If the batteries are near end of life and the LED turns off while the receiver is operating, this is an

indication to change or recharge your batteries. Approximately one hour of battery life remains.

Repeatedly charging the batteries after short periods of use (1-2 hours) will shorten battery life.

Rechargeable batteries will need to be replaced after 1–2 years of use.

FIGURE 7: USING THE OPTIONAL CHG 200-02 BATTERY CHARGER TOCHARGE TRANSMITTERS AND RECEIVERS

Williams Sound ®

Helping People Hear

USING YOUR PERSONAL FM SYSTEM WITH A HEARING AID

If you have a hearing aid equipped with a Telecoil (T-Switch), you can use a Neckloop

(NKL 003–children’s size, or NKL 001–adult’s size) to magnetically couple the signal from the

PFM Receiver into your hearing aid.

The Neckloop plugs into the earphone jack of the receiver. Turn the switch to the “T” position on

your hearing aid and adjust the volume control on the receiver to a comfortable level.

Direct Audio Input cords can be used with compatible hearing aids as well as with Cochlear

Implant Processors. If your hearing aid has a direct audio input boot, you can obtain a cord from

your hearing aid manufacturer to plug directly into the PFM receiver. The cord should have a 3.5

mm plug.

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