Sony SXA-J750 User manual

Sony Corporation Printed in Japan
Specifications
Design and specifications are subject to change
without notice.
SX-H750 Wired Monitor Unit
Input 12-pin connecting cable
Output Earphone (minijack) ×1
Output level 39 mV (–26 dBs),
8 ohms
Current consumption
24 V DC, 8 mA
Dimensions 41 × 64.3 ×106 mm (w/h/d)
(15⁄8×2 5⁄8×41⁄4inches)
Mass 0.22 kg (8 oz)
SXA-J750 Interface Unit
Input LINE IN (D-sub 15-pin) ×1
AC IN (3-pin) ×1
Output LINE OUT (D-sub 15-pin) ×1
Terminal (6-pin and 4-pin) ×1
Power requirements
USA model: 120 V AC, 60 Hz
European model: 230 V AC,
50/60Hz
Power consumption
USA model: 0.32 A
European model: 30 W
Dimensions 202 × 68.1 ×258.9 mm (w/h/d)
(8 ×2 3⁄4×101⁄4inches)
Mass 2.4 kg (5 lb 5 oz)
Supplied accessories
AC power cord (1)
Operating Instructions (1)
SXA-J751 Joint Box
Input 2.54-mm pitch connector (14-pin)
×1
Output 2.54-mm pitch connector (14-pin)
×1
2-mm pitch connector (12-pin) ×2
Dimensions 102 × 38.2 ×75.5 mm (w/h/d)
(41⁄8×1 9⁄16 ×3 inches)
Mass 0.15 kg (5 oz)

1997 by Sony Corporation
Operating Instructions
Before operating the unit, please read this manual
thoroughly and retain it for future reference.
3-861-157-12 (1)
Wired Monitor
System
SXA-J750 Interface Unit
SXA-J751 Joint Box
SX-H750 Wired Monitor Unit

2
Owner’s Record
The model and serial numbers are located on the rear panel
of the SXA-J750, on the front panel of the SXA-J751 and at
the side panel of the SX-H750. Record the serial numbers in
the spaces provided below. Refer to them whenever you call
upon your Sony dealer regarding the product.
Model No. SXA-J750 Serial No.______________
Model No. SXA-J751 Serial No.______________
Model No. SX-H750 Serial No.______________
WARNING
To prevent fire or shock hazard, do not
expose the unit to rain or moisture.
This symbol is intended to alert the user to
the presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the appliance.
This symbol is intended to alert the user to
the presence of uninsulated "dangerous
voltage" within the product's enclosure that
may be of sufficient magnitude to
constitute a risk of electric shock to
persons.
For the customers in the U.S.A.
NOTICE FOR THE CUSTOMERS IN THE
UNITED KINGDOM
WARNING
THIS APPARATUS MUST BE EARTHED
IMPORTANT
The wires in this mains lead are coloured in accordance with
the following code:
Green-and-yellow: Earth
Blue: Neutral
Brown: Live
As the colours of the wires in the mains lead of this
apparatus may not correspond with the coloured markings
identifying the terminals in your plug proceed as follows:
The wire which is coloured green-and-yellow must be
connected to the terminal in the plug which is marked by the
letter E or by the safety earth symbol Yor coloured green or
green-and-yellow.
The wire which is coloured blue must be connected to the
terminal which is marked with the letter N or coloured black.
The wire which is coloured brown must be connected to the
terminal which is marked with the letter L or coloured red.
VORSICHT
Um Feuergefahr und die Gefahr eines elektrischen Schlages
zu vermeiden, darf das Gerät weder Regen noch
Feuchtigkeit ausgesetzt werden.
Für Kunden in Deutschland
Dieses Produkt kann im kommerziellen und in begrenztem
Maße auch im industriellen Bereich eingesetzt werden. Dies
ist eine Einrichtung, welche die Funk-Entstörung nach
Klasse B besitzt.

3
Table of Contents
Overview ................................................................................................................4
Features ..............................................................................................................4
System Configuration ........................................................................................5
Location and Function of Parts and Controls....................................................6
SXA-J750 Interface Unit ...................................................................................6
SX-H750 Wired Monitor Unit ...........................................................................6
Precautions ............................................................................................................7
Setting Up the System ...........................................................................................8
System Connection ............................................................................................8
Pin Assignments ................................................................................................9
Monitoring the Conference ................................................................................11
Troubleshooting Guide .......................................................................................11
Specifications ........................................................................................Back cover

4
Overview
Features
This system is composed of the following units:
SXA-J750 Interface Unit
When connected to a simultaneous interpretation
system, the original speech and up to six different
interpreted languages are sent to the monitor units via
this unit. Up to 30 SXA-J751 Joint Boxes can be
connected to one SXA-J750 unit. Thus, up to 60
monitor units can be connected to one line.
This unit also supplies the power of 24 V DC to the
monitor system.
SXA-J751 Joint Box
The SXA-J751 Joint Boxes are designed for
installation near the audience seats. Up to two SX-
H750 Monitor Units can then be connected to one
SXA-J751.
SX-H750 Wired Monitor Unit
This unit allows observers to listen to the conference
via an earphone by selecting either the original speech
or one of up to six interpreted languages.
Since the monitor unit is compact and light, they can
be placed anywhere.
The Sony conference system has three types of
monitor systems, wired, infrared and inductive loop,
which are designed mainly for the observers at
conferences using a simultaneous interpretation.
This system is a wired system designed for easy
installation. Combined with a simultaneous
interpretation system, it is applicable to various
venues, such as large international symposiums or
panel discussions. In addition, since this system
employs an automatic, wide-range power system (100
V, 120 V or 230 V AC), you can use it on the local
power source without changing the power voltage
settings in the unit.

5
System Configuration
The figure below shows an example of the
simultaneous interpretation system.
Conference hall
VU
I
O
POWER
PHONE
ON
OFF
MONITOR
MIN MAX
1
2
3
456
7
8
9
MONITOR
ORIGINAL
INTRT[TRYRT
CHANNEL
12345
6
INTERPRETER'SUNIT SX-P700
MICROPHONECHANNEL MICROPHONE CHANNEL
MONITOR
1
2345
61
2345
6
MONITOR
ORIGINAL RELAY
VOLUME
MIN MAX
1
2
34567
8
9
COUGHCUT
MICROPHONE
ONON OFF
COUGHCUT
SLOW
VOLUME
MIN MAX
1
2
34567
8
9
ORIGINALRELAY
INTERPRETER'SUNIT SX-P700
MICROPHONECHANNEL MICROPHONE CHANNEL
MONITOR
1
2345
61
2345
6
MONITOR
ORIGINAL RELAY
VOLUME
MIN MAX
1
2
34567
8
9
COUGHCUT
MICROPHONE
ONON OFF
COUGHCUT
SLOW
VOLUME
MIN MAX
1
2
34567
8
9
ORIGINALRELAY
010
1
2
3
456
7
8
9
MIC/LINE 1 MIC/LINE 2
MIC/LIMIT
ON/OFF DIRECT ACCESS ON/OFF SEAT ASIGN START/END
D/C UNIT SP
010
1
2
3
456
7
8
9
010
1
2
3
456
7
8
9
010
1
2
3
456
7
8
9
D/C UNIT MIC
ORIGINAL
POWER AC IN
Conference seat
SX-C700A
Chairman’s Unit a)
SX-D700A Delegate’s Unit a)
SXA-J751 Joint Box SXA-J750 Interface Unit
SX-H750 Wired
Monitor Unit
Operator section
SX-M700 Control Unit
Interpreter’s booth
SX-P700
Interpreter’s Unit
a) You can also use the SX-C750/D750 desk-mounted Chairman’s Unit and
Delegate’s Unit instead of the SX-C700A/D700A.

6
Location and Function of Parts and Controls
SXA-J750 Interface Unit
1POWER indicator
2AC IN connector
3LINE IN connector
4LINE OUT connector
5Outlet for SXA-J751 connecting cable
1POWER indicator
Lights when the power of the control unit of the
conference system is turned on.
2AC IN (AC power input) connector
Connect to an AC power source using the supplied AC
power cord.
3LINE IN (input) connector (D-sub 15-pin)
Inputs the audio signals of the original speech and six
channel interpreted languages and 24 V DC power.
4LINE OUT (output) connector (D-sub 15-pin)
Outputs the buffer audio signals of the original speech
and six channel interpreted languages and 24 V DC
power for the wired monitor unit. Connect to another
SXA-J750.
5Outlet for SXA-J751 connecting cable
Outlet for the cable connecting to the SXA-J751. The
connecting cable is soldered to the TM1 and TM2 pins
of the outlet connector. The SXA-J751 Joint Boxes are
connected successively by using the cabe with
connectors at both sides. Up to 60 SX-H750 can be
connected to one SXA-J751. Decide the number of the
SXA-J751 according to the layout of the wired
monitor units. Up to two SX-H750 can be connected to
one SXA-J751.
SX-H750 Wired Monitor Unit
1CH selector
2VOL control
3@connector
1CH (channel) selector
Select the channel corresponding to the desired
interpreted language. Channel 0 is the channel of the
original speech.
2VOL (volume) control
Adjust the volume of the earphone. Rotating the VOL
control fully counterclockwise does not turn the
earphone volume completely off.
3@(earphone) connector (minijack)
Connect an earphone. The minijack accepts stereo
headphones with a mini plug, but the output signal is
monaural sound.
Notes
•To connect the wired monitor units to the conference
system, the SXA-J750 and SXA-J751 (neither is
supplied) are required.
•The audio signal input to the SXA-J750 is high
impedance. Short-circuit the input pins of unused
channels to put them at low impedance.
•Up to 60 SX-H750 can be connected to one SXA-
J750, and two SX-H750 can be connected to one
SXA-J751.

7
Precautions
Safety precautions
Power supply
•Operate the unit only with a power source as
specified in “Specifications” section.
•Do not drop or place heavy objects on the power
cord. If the power cord is damaged, turn off the
power immediately. It is dangerous to use the unit
with a damaged power cord.
•Disconnect the power cord from the AC outlet by
grasping the plug, not by pulling the cord.
Keep foreign objects out of the cabinet
Dropping flammable or metal objects into the cabinet,
or spilling liquids onto the cabinet can lead to
accidents.
In case of malfunctions
If you notice any unusual sound, smell or smoke, turn
off the power immediately, disconnect the power
supply and contact your Sony dealer.
Cleaning
Clean the cabinet and panels by wiping with a soft, dry
cloth. For severe stains, moisten the cloth with a small
amount of neutral solvent, and finish by wiping with a
dry cloth. Do not use alcohol, benzine, thinner or
volatile liquids, as these may discolor or damage the
cabinet surface.

8
Setting Up the System
System Connection
Cable with 20-pin
multi-connector c)
INTERPRETER’S
UNIT a)
CONTROL UNIT/
INTERPRETER’S
UNIT a)
RK-1700/1705
connecting cable
(10 m/5 m) (not
supplied) b)
MIC IN
SX-P700
to AC power source
Microphones
AC power cord
(supplied with SX-M700)
SX-C700A d)
to output
connector a)
Main headphones
Sub-headphones
SUB
MAIN
RK-1700/1705
connecting cable (10 m/
5 m) (not supplied) b)
a)For details of connecting cables, see “How to connect
cables” on page 9.
b)You can extend the distance between units up to 60
meters by using the RK-1710/1713 connecting cable
between the RK-1700/1705 connecting cable and the
interpreter’s unit. Note, however, that the maximum length
must not exceed 60 meters (196.8 feet).
c) You can extend the distance between units by using the
RK-1710/1713 connecting cable (not supplied).
MIC LINE
EXT UNIT EXT IN-1 LINE OUT
CH6 CH5 CH4 CH3 CH2 CH1 ORG
@TELEPHONE COUPLER
AC IN94B
1234 DELEGATE'S/CHAIRMAN'S UNITINTERPRETER'S UNIT 12
LINEMIC LINEMIC
LINE
1
2
12345
ORG
OUT IN
EXT IN-2
INTERPRETER'SUNIT SX-P700
MICROPHONECHANNEL MICROPHONE CHANNEL
MONITOR
1
2345
61
2345
6
MONITOR
ORIGINAL RELAY
VOLUME
MIN MAX
1
2
34567
8
9
COUGHCUT
MICROPHONE
ONON OFF
COUGHCUT
SLOW
VOLUME
MIN MAX
1
2
34567
8
9
ORIGINALRELAY
INTERPRETER'SUNIT SX-P700
MICROPHONECHANNEL MICROPHONE CHANNEL
MONITOR
1
2345
61
2345
6
MONITOR
ORIGINAL RELAY
VOLUME
MIN MAX
1
2
34567
8
9
COUGHCUT
MICROPHONE
ONON OFF
COUGHCUT
SLOW
VOLUME
MIN MAX
1
2
34567
8
9
ORIGINALRELAY
POWER AC IN
AC IN
DELEGATE’S/CHAIRMAN’S UNIT a)
SX-D700A d) (Up to 15 units of SX-C700A and SX-
D700A can be connected to one line.)
SXA-J751 SXA-J751 SXA-J750
SX-H750 SX-H750
The figure below shows an connection example.
d)The desk-mounted SX-C750/D750 can also be used in this
system. Up to 15 desk-mounted SX-C750 and SX-D750
units can be connected to one line.The specially designed
cables are used to connect these units to the system.
For details, contact your Sony dealer.
e)The distance from the first SXA-J750 and the last SXA-
J750 is 120 meters (394 feet).
SX-M700

9
When connecting When disconnecting
When connecting When disconnecting
How to connect cables of SX-C700A/D700A
The figure below shows how to connect and
disconnect the 20-pin multi-connectors of the
chairman’s/delegate’s unit, RK-1700/1705 and RK-
1710/1713 connecting cables.
White mark
White mark
With the white mark on the 20-
pin multi-connector facing up,
push the connector home until it
clicks.
Grasp the knurled part
of the connector and
pull it towards you.
Grasp the knurled
part of the
connector and pull
it towards you.
Meet the white marks on
each connector and push
the connectors each other
until they click.
Pin Assignments
Pin assignments between the 20-pin
round connector and the D-sub 15-pin
connector
The table below shows the pin assignments to connect
the last SX-C700A/D700A and the SXA-J750.
20-pin
round
connector
Pin No.
1
2
3
4
5a)
6
7
8
9
10
11
12
13a)
14
15
16
17
18
19
20
Signal
ORG
CH2
CH1
CH3
P.GND
CH4
CH5
CH6
NC
MIC
D.GND
+12V
P.GND
+24 V
+24 V
(spare for
24 V)
DTO + OUT
DTO – OUT
DTO + OUT
DTO + OUT
D-sub
15-pin
connector
Pin No.
2
4
3
9
5
10
12
11
—
1
6
13
5
13
13
—
7
8
14
15
Type and color of the
core cable
Shielded cable, Brown
Shielded cable, Red
Shielded cable, Orange
Shielded cable, Yellow
Shield of the brown
shielded cable
Shielded cable, Blue
Shielded cable, Purple
Shielded cable, Gray
—
Shielded cable, White
Vinyl cable, Black
Vinyl cable, Brown
Shield of the gray
shielded cable
Vinyl cable, Red
Vinyl cable, Orange
—
Twisted cable, Yellow
Twisted cable, Gray
Twisted cable, White
Twisted cable, Black
a) Use the 7-613-001-61 shielded cable with 16 core
cables.
To connect the SX-C750/D750 desk-mounted
type Chairman’s Unit and Delegate’s Unit and
the SXA-J750
Use the specification in the right column of the above
table to connect the SX-C750/D750 and SXA-J750.
Note
The multiple connecting cables of the shielded cable
are connected to one connector. Be sure to check that
they are correctly connected.
For detailed information on the pin assignment, see “Pin
Assignments”.

10
Pin assignments of D-sub 15-pin to
interconnect SXA-J750 Wired Monitor
Units
The table below shows the pin assignments to connect
the SXA-J750 with the next SXA-J750.
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Signal
MIC
ORG
CH1
CH2
P.GND
D.GND
DTO + OUT
DTO – OUT
CH3
CH4
CH5
CH6
+24 V
CKO + OUT
CKO – OUT
Type and color of the core cable
N.C
Shielded cable, Brown
Shielded cable, Orange
Shielded cable, Red
Shield of the brown shielded cable
Vinyl cable, Black
N.C
N.C
N.C
Shielded cable, Yellow
Shielded cable, Blue
Shielded cable, Gray
Shielded cable, Purple
Shielded cables, Red, brown and
orange
N.C
N.C
Pin assignments to connect the interface
unit with the joint box
•To connect the SXA-J751 Joint Box with the next
SXA-J751: CN4 nCN3
•To connect the SXA-J750 Wired Monitor Unit with
the SXA-J751 Joint Box: TM1 and 2 nCN3
The following core cables of the 7-613-001-61
shielded cable with 16 core cables are not used. Cut
those cables at the shield.
•Shielded cable, White
•Twisted cables, Yellow, gray, white and black
The LINE IN connector (D-sub 15-pin) of the SXA-
J750 is male and the LINE OUT connector (D-sub 15-
pin) is female.
Pin No.
TM1-1
TM1-2
TM1-3
TM1-4
TM1-5
TM1-6
TM2-1
TM2-2
TM2-3
TM2-4
Square 14-pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Signal
24 V
24 V
24 V
24 V
ORG
GND
CH1
CH2
CH3
CH4
CH5
CH6
GND
GND
Type and color of the
core cable
Vinyl cables, Red and
orange
Vinyl cable, Brown
Twisted cable, Yellow
Twisted cables, Gray
and white
Twisted cable, Black
Shielded cable, Brown
Shield of the brown
shielded cable
Shielded cable, Orange
Shielded cable, Red
Shielded cable, Yellow
Shielded cable, Blue
Shielded cable, Gray
Shielded cable, Purple
Shield of the gray
shielded cable
Vinyl cable, Black
Use the 7-613-001-61 shielded cable with 16 core
cables.
Cut the white shielded core cable at the shield. This
core cable is not used.
Setting Up the System

11
Monitoring the
Conference
For detailed information on how to operate the
conference system, refer to the manuals supplied with
the SX-M700/M150/M100.
For details of how to operate the SX-H750 Wired
Monitor Unit, see “SX-H750 Wired Monitor Unit” in
“Location and Function of Parts and Controls” on page
6.
1Insert the earphone into the earphone jack.
2Set the CH selector to the channel corresponding to
the desired interpreted language.
3Adjust the sound volume with the VOL control.
2
3
1
Troubleshooting Guide
Should a problem arise in your system, check the
system while referring to the instructions in the table
below.
For more information on the troubleshooting guide,
refer to the manual supplied with the SX-M700/
M150/M100.
Symptoms
The POWER indicator of
the SXA-J750 lights, even
though the power of the
control panel of the
conference system is not
turned on.
The POWER indicator of
the SXA-J750 does not
light, even though the
power of the control panel
of the conference system
is turned on.
Possible cause/remedies
The AC remote switch in the
SXA-J750 is set to CHECK.
nAC remote switch should be
set to REMOTE. This
operation must be
performed by qualified
service personnel only.
Contact your nearest Sony
dealer.
The power cord of the SXA-
J750 is not connected.
nConnect the AC power cord
to the AC IN connector of
the SXA-J750.
If this symptom continues
even after the AC power
cord is connected, contact
your nearest Sony dealer.