Sony MB-806A, Service Manual

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1-4
MB-806A (CE)
WRU-806A
(CE,
AU)
4 GB
CH
GP
ON
OFF
POWER
+
–
GP CH
1 2 3 4 5 6
BATT AF
RF
1
POWER switch
2
GP button
3
CH button
4
+ button
5
– button
6
Display
Front Panel
Display
Location of Parts and Controls
1
AF (audio frequency) indicator
2
AF (audio frequency) level indications
The indicator lights and the indications appear when
the audio output level is higher than the reference
level.
1
POWER switch
Turns the power on and off.
2
GP (group) button
To change the group, press the + or – button while
holding this button down.
3
CH (channel) button
To change the channel in a group, press the + or –
button while holding this button down.
4
+ button
To go to a higher group or channel, press this button
while holding the GP or CH button.
Press this button changes the indication from GP/CH
to frequency.
5
GP/CH indication
1
AF indicator
2
AF level indications
3
BATT indicator
4
BATT indication
6
RF level indications
7
RF indicator
5
– button
To go to a lower group or channel, press this button
while holding the GP or CH button.
6
Display
Displays the status of the tuner and the group and
channel assigned to the unit.
For details, see the following section “Display”.
7
Blank panels
Remove these panels to install optional WRU-806A
UHF Synthesized Tuner Units.
3
BATT (battery) indicator
4
BATT (battery) indication
Indicate the condition of the wireless microphone
transmitter batteries. The indicator and indication
appear and start flashing about one hour before the
transmitter batteries go flat.
The time at which flashing begins will depend on the
type of battery used in the transmitter, and its
condition.
5
GP/CH (group/channel) indication
Shows the reception channel group and respective
channel number.
Pressing the + button changes this indication to the
frequency indication.
6
RF (radio frequency) level indications
7
RF (radio frequency) indicator
The indicator lights and the indications (dots) appear
when the antenna reception is optimal. Depending on
the RF input level, the number of dots changes.
GP CH
BATT AF
RF
7
Blank panels
5 GB
ANTENNA B TUNER OUTPUT MIX OUTPUT
IN(DC 9V OUT)
ATT
0
6
10dB
AC IN
OUTPUT
LEVEL
LINE
–20dBm
MIC
–58dBm
⁄
ANTENNA A
IN(DC 9V OUT)
ATT
0 10dB
5 4 3 2 1
3
AC IN connector
4
OUTPUT LEVEL switch
5
MIX OUTPUT connector
6
TUNER OUTPUT connectors
2
ANTENNA A, B ATT switches
Rear Panel
1
ANTENNA A, B IN/DC 9V OUT (antenna A, B
input/DC power output) connectors (BNC type)
Connect the supplied antenna or an optional AN-820A
UHF Antenna. To connect two of these units, these
connectors are connected to the ANTENNA OUT
connectors of the WD-820A UHF Antenna Divider.
When the AN-820A is connected, 9 V DC power is
supplied to the antenna’s internal booster through these
connectors.
Note
Never short-circuit these connectors.
2
ANTENNA A, B ATT (attenuation) switches
Select the RF attenuation as 0 dB or 10 dB.
Usually set the switches to 0 dB. If noise generates or
sound discontinues due to interference, set the
switches to 10 dB.
It is recommended that you set the switches as follows
depending on the antennas connected to the
ANTENNA A, B IN/DC 9V OUT connectors.
Using the supplied antenna: 0 dB
Using an optional AN-820A UHF Antenna (with a
WD-820A Antenna Divider): 10 dB when the coaxial
cable (5D-2V, RG-212/U or equivalent) connecting the
antennas and tuner is 30 m (100 feet) or less, or 0 dB
when the cable is over 30 m (100 feet)
3
AC IN connector
Connects to an AC power source with the supplied AC
power cord.
4
OUTPUT LEVEL switch
Selects the mixed output level and tuner output level as
–20 dBm or –58 dBm. (0 dBm = 0.775Vrms)
Set this switch according to the input level of the
equipment connected to the unit.
5
MIX OUTPUT connector (XLR type)
Supplies mixed audio signals of six tuner units. You
can connect this to the audio input connector of a
mixer, amplifier or similar equipment.
6
TUNER OUTPUT (tuner sound output) (XLR
type)
Each connector supplies the audio signal from the
corresponding tuner unit. You can connect this to the
audio input connector of a mixer, amplifier, or similar
equipment.
1
ANTENNA A, B IN/DC 9V OUT connectors
MB-806A (CE)