Sony WRT-800A Service Manual page 4

3-860-354-31(1)
UHF Synthesized
Wireless Microphone
Operating Instructions
WRT-800A
© 1997 by Sony Corporation
[AU66]
Printed in Japan
Precautions
•
The unit is designed for use in ambient temperature
range of 0°C to 50°C (32°F to 122°F).
•
Do not place the unit on or near heat sources, such as
lighting equipment, power amplifiers, or in a place
subject to direct sunlight or excessive moisture. In such
places, the external finish or internal parts of the unit
may be damaged.
•
If the unit is used in a very humid or dusty place or in a
place subject to an active gas, clean its surface as well as
the connectors with a dry, soft cloth soon after use.
Lengthy use of the unit in such places or not cleaning it
after its use in such places may shorten its life.
•
When cleaning the unit, never use organic solvents such
as thinner or benzine, which will damage the finish of the
unit.
•
The unit has been factory adjusted precisely. Do not
tamper with its internal parts or attempt to repair it.
Introduction
The WRT-800A is a wireless microphone to be used
in combination with the WRR-800A/801A UHF
Synthesized Diversity Tuner for an 800 MHz band UHF
synthesized wireless microphone system for broadcast or
movie production purpose.
The WRT-800A can also be used in conventional Sony
Wireless Microphone System composed of the WRT-810A/
820A UHF Synthesized Transmitter, WRR-810A/820A/
840A/850A UHF Synthesized Diversity Tuner, etc.
Features
Easy selection of 102 channels
The microphone can operate on any one of 102 carrier
frequencies selected by a simple operation.
Operation powered by easily available battery
The built-in high-efficiency DC-DC converter allows stable
operation, for about 12 hours continuously, with just a
single LR6 (size AA) alkaline battery.
Remote battery alarm on tuner
This microphone has capability of transmitting "Battery
status information" to the WRR-800A/801A/850A to give
advance warning of battery depletion.
The information is sent to the WRR-800A/801A/850A in
approx. 1 hour advance to battery exhaust so that they can
safely replace battery of the microphone.
When the WRR-800A/801A/850A receives the
information, the LED and the LCD on the panel start
flashes.
RF carrier with tone signal
The unit transmits the RF carrier accompanied by a tone
signal, enabling the tuner with a tone squelch circuit to take
out only the target audio signal received.
Wide dynamic range and low noise
The compander (compressor/expander) system enables
transmission over a wide dynamic range with minimum
noise.
Compact helical antenna
Parts Identification
S
1 Power indicator
2 Power switch
3 Channel select switches
4 Screwdriver compartment (rear)
Battery compartment
Antenna
Grip
1 Power indicator
Lights when the power of the wireless microphone is turned
ON. Promptly replace the battery if the indicator does not
light even when you turn the power on.
2 Power switch
Turns the power of the wireless microphone ON or OFF.
3 Channel select switches
For setting the transmitting channel.
4 Screwdriver compartment
To store the supplied screwdriver for channel setting.
Removing/storing the screwdriver
To remove To store
Power Supply
The microphone can operate on one LR6 (size AA) alkaline
battery continuously for about 12 hours at 25°C (77°F).
Inserting the batteries
1
Rotate the grip counterclockwise and slide it down.
Battery compartment
Note
The grip may separate from the body. Be careful not to
drop it.
2
Match the polarity and insert the battery.
3
Return the grip to its original position and rotate it
clockwise to secure.
Battery indication
When you turn the power on, the power indicator lights.
When the battery level becomes low, the indicator goes off
as a warning. Promptly replace the battery if the power
indicator does not light when you turn the power on.
•
The BATT indication on the WRR-800A/801A/850A
starts flashing in synchronization when the power
indicator of this wireless microphone goes off.