Sony WRR-805A, Service Manual

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1-4
WRR-805A (CE, AU)
12 GB
Microphone System Operation
1
Set the MUTING switch ON before turning on the tuner.
2
Turn the POWER switch on.
3
Set the reception channel.
For details on setting the channels, see page 8.
4
Set the MUTING switch OFF, and turn on the transmitter
or the wireless microphone.
If noise is heard
Depending on the environment where the system is
installed, outside noise or radio wave may disrupt the
transmission of certain channels.
To select a channel under this circumstance, turn off the
wireless microphone or transmitter. Then select a channel at
which the RF indicator is off. (A channel free from noise or
radio wave interference is selected.) Set the same channel on
the microphone or transmitter.
Muting Functions
When the MUTING switch is set to ON, the following
muting functions work in combination.
(1) Muting by RF input level
As sufficient S/N for the audio output may not be obtained if
no RF signal is received or the RF input level is low. The
audio output can be muted when the RF input level falls
below the muting level (15dBµ
).
(2) Tone squelch
The audio output is obtained only when the unit receives an
RF signal which includes a specified tone signal. The audio
output is muted to eliminate noise which may be heard when
the transmitter is turned on/off or the unit receives an
interference RF signal.
(3) Noise squelch
The audio output is muted to eliminate noise which may be
heard when there is such excessive interference RF signal
that the tone squelch does not work.
13
GB
When a problem occurs, one of the following error message
may appear on the display.
Messages Contents Measures
ERROR 03 The battery voltage exceeds the allowable value. Use the specified batteries.
ERROR 11 An error occurred in backup memory data. The memory data is initialized. Reset the group and
channel settings.
ERROR 21 The PLL synthesized circuit is in trouble. Contact your Sony dealer.
ERROR 51 Defect of the A/D converter. Contact your Sony dealer.
Notes
To eliminate interference or noise, please note the
following.
• Do not use two or more wireless microphones or
transmitters whose wireless channels are the same.
• The number of wireless channels actually usable in a
multi-channel system may be smaller than the normal
capacity of that system if there is interference from TV
broadcasting or other RF signals.
• When using two or more WRR-805As, do not directly put
one unit upon the other.
Error Messages
15
GB
Specifications
Tuner section
Type of reception F3E
Circuit system Dual conversion superheterodyne
Receiving frequencies
CE 62 model: 800.000 - 814.000 MHz
CE 69 model: 854.125 - 862.000 MHz
Local oscillators Crystal controlled PLL synthesizer
Selectivity 60 dB or more (at ±250 kHz detuned)
Spurious rejection ratio
70 dB or more
Image rejection ratio
60 dB or more
Muting level 15 dBµ ±5 dBµ
Type of antenna 1 /
4
- wavelength wire
Frequency range 100 Hz to 15,000 Hz ±3 dB
De-emphasis 50 µsec
Signal-to-noise ratio
30 dB or more at an A-weighted RF
input level of 10 dBµ
60 dB or more at an A-weighted RF
input level of 60 dBµ
(±5 kHz deviation at 1 kHz
modulation)
Distortion 1% or less (±40 kHz deviation at
1 kHz modulation)
Tone signal frequency
32.768 kHz
Output level –58 dBm (±5 kHz deviation at 1 kHz
modulation)
Output impedance 600 ohms
Output connector 3.5 mm dia., balanced
0 dBµ = 1µV
0 dm = 0.775 Vrms (600 ohms loaded)
General
Power requirements DC 3 V, two batteries LR6 (size AA)
Current consumption
Approx. 170 mA
Battery life Approx. 6 hours of continuous use
with two Sony LR6 batteries
at 25
°
C (77
°
F)
Operating temperature
0
°
C to +50
°
C (32
°
F to 122
°
F)
Storage temperature –20
°
C to +55
°
C (–4
°
F to +131
°
F)
Dimensions 44
×
121
×
24 mm (w/h/d)
(1
5
/
8
×
4
7
/
8
×
31
/
32
inches)
Mass 140 g (6 oz) including batteries
Supplied accessories
Attachment case with a belt clip (1)
Output cable (1)
Operating instructions (1)
Design and specifications are subject to change without
notice.
14 GB
1
2
Use of the Soft Case
The soft case can be used as shown below.
Output cable holder
To microphone
input of the
camcorder
Cable
holders
Inserting the unit in reverse direction
MONITOR connector
can be used without
hindrance.
Detaching the belt clip
While pressing down the shoe on the case
1
, pull out the belt clip
2
.
Attaching the unit to a handle
or a belt Turning the unit Attaching the unit to a camcorder