Receiver Frequency Change Procedure:
The R7 receiver tuning is determined by a single tuning coil, and is stabilized by phase-locked-loop
circuitry. A plastic tuning wrench (PLT 005) is needed to adjust the receiver tuning coil.
(1)
Use the PPA transmitter as a tuning signal source. Make sure there is some kind of audio input
(tape or radio) to the transmitter so you have something to listen to.
(2)
Disconnect the antenna from the transmitter. The receiver must be tuned under weak signal
conditions.
(
3)
Open the back of the receiver to expose the circuit board. Open the receiver battery flap first.
The receiver back snaps open like a book. Hold the receiver near the transmitter while tuning.
(4)
Use the diagram below to locate the tuning coil. Use the earphone supplied with the receiver to
listen for the transmitter signal while you adjust the tuning coil with the tuning wrench. Adjust the
tuning coil slowly and carefully. Do not press down on the tuning slug. Adjust for maximum signal.
(5)
Re-tune all the receivers and mark the new frequency inside the case for future reference.
Warranty
The Williams Sound PPA Transmitter is warranted against defects in workmanship and materials for
FIVE YEARS. PPA Receivers are warranted against defects in workmanship and materials for THREE
YEARS. Microphones, earphones, cables, carry cases, rechargeable batteries and chargers are
warranted against defects in workmanship and materials for 90 DAYS. This warranty does not extend
to intentional or accidental physical damage. This warranty applies only to products returned to
Williams Sound for service. Please complete and return the Warranty Registration Card included
with the system.
To return a product for service, call 1-800-843-3544 and request a Return Authorization (RA) number.
FCC License Instructions:
The T21 Transmitter requires an FCC license for legal operation. We have enclosed a license form
for your convenience. Complete the form, following the instructions below, and mail it to the FCC at
the address listed. There is a $80.00 filing fee, payable to the FCC. When the application is
approved and payment is received, the FCC will mail the license to you.
Important Note:
Be sure to fill in all items completely, even if you are duplicating information. Do
not use phrases like "see above." The FCC will reject incomplete applications.
Receiver Case Open
Page 11
Tuning Coil
Receiver Tuning Coil Location
