Sony MB-806A Service Manual page 19

3-867-236-21 (1)
UHF Synthesized
Tuner Unit
Operating Instructions
Bedienungsanleitung
WRU-806A
[CE62] [CE69]
© 1999 by Sony Corporation
English
Overview
The WRU-806A is a reliable UHF synthesized tuner unit for the 800-
MHz-band Sony UHF wireless microphone system which uses the
frequency bands allocated for UHF TV broadcasting. To use this unit,
install it in a Sony MB-806A Tuner Base Unit.
The unit is designed to enable simultaneous use of multiple channels
when channels are selected according to the Sony channel plan.
In building up a UHF wireless microphone system, be sure to combine
a microphone/transmitter and a tuner having the same TV channel
number (62 or 69).
The following are the principal features of this unit.
Phase Locked Loop (PLL) synthesized system
The unit has a refined phase locked loop (PLL) synthesizer circuit.
Preprogrammed wireless channel plan for simultaneous
multichannel operation
The unit has many preprogrammed, easily settable channels in a
simultaneous multichannel operation.
Versatile display
A liquid-crystal display provides a variety of information, including
the levels of the reception channels, RF information and transmitter
battery alarm.
Space diversity reception system
The unit provides stable signal reception with minimum dropout.
Tone squelch circuit for noise elimination
A built-in squelch circuit eliminates noise and signal interference
when the unit is in signal reception standby mode.
Compander system
A compander (compressor/expander) system enables stabilized
wireless transmission over a wide dynamic range.
System Configuration
The unit can be used with a UHF Synthesized Wireless Microphone or
UHF Synthesized Transmitter among the models listed in the table
below.
Sony 800 MHz band system models
Frequency band Model name
TV channel Frequency (MHz) Transmitter or Tuner
microphone
62 800.000 to 814.000 WRT-805A (62) WRR-805A (62)
WRT-807A (62) WRR-802A (62)
WRT-822A (62) MB-806A with
WRU-806A (62)
69 854.125 to 862.000 WRT-805A (69) WRR-805A (69)
WRT-807A (69) WRR-802A (69)
WRT-822A (69) MB-806A with
WRU-806A (69)
Precaution
On operation
• The unit must be used within a temperature range of 0°C to 40°C.
Avoid using the unit for extended periods at extremely high
temperatures or placing it in direct sunlight, especially outdoors
because this may damage the finish of the case. Never install the unit
on or near a heat source, such as lighting equipment or power
amplifiers.
• Avoid using in very humid or dusty places, because such use may
shorten the life of the unit.
• To avoid degradation of the signal-to-noise ratio, do not use the unit
in noisy places or in locations subject to noise or vibration, such as
the following:
— near electrical equipment, such as motors, transformers or
dimmers
— near air conditioning equipment or places subject to direct air
flow from an air conditioner
— near public address loudspeakers
— where adjacent equipment might knock against the unit
• Switching lights on or off may produce electrical interference over
the entire frequency range. Position the unit and the wireless
microphones so that interference is minimized.
• The unit is precisely adjusted at the factory and no adjustment before
use is necessary. Do not touch the inside of the unit or try to repair it
by yourself.
On cleaning
Clean the unit with a dry, soft cloth. Never use thinner, benzene,
alcohol or any other chemicals, since these may damage the finish.
A
MB-806A
1
2
B
Lever
Base side of MB-
Hebel
806A
Unterseite des
MB-806A
English
Installing in the MB-806A
Up to six WRU-806A units can be installed in the MB-806A.
In building up a system, be sure to combine a WRU-806A having the
same TV channel number (62 or 69).
For information about operating this unit, refer to the Operating
Instructions for the MB-806A.
Installation (See fig. A.)
Notes
• Be sure to power off the MB-806A before installing this unit.
• The buttons and display of this unit may be damaged if they are
gripped too strongly. Always hold this unit by the side.
• Do not touch the connectors on the rear panel of this unit.
• Be careful of static electricity.
1
Hold this unit by the side and insert into the slot. Push in until
you hear a click.
2
To install two or more units, detach the necessary number of
blank panels by pushing in the top and bottom tabs of each panel
and pulling the panel out. Then do step 1 for each unit.
Removal (See fig. B.)
On the base side of the MB-806A, locate the lever corresponding to
the slot where the unit is installed and pull the lever forward. The unit
is ejected from the slot.
Error Message
Apart from the normal indications, the following error messages may
appear on the display.
Message Meaning Measures
Err 01 An error has occurred in the The memory data is
backup memory data. initialized. Reset the group
and channel settings.
Err 02 The PLL-synthesized circuit Contact your nearest Sony
has a malfunction. dealer.
NO TONE As no tone signal is Make sure that the
available or a tone signal transmitter is turned on. If it
other than 32.768 kHz is is, then the problem lies in
being received, the audio the transmitter's tone signal
signal output is muted. generator or the tuner's
tone squelch circuit.
Contact your nearest Sony
dealer.