UPDATING THE FIRMWARE .................................................................... 64
PARTS LIST
IC & DIODE FIGURES
BLOCK DIAGRAM
CIRCUIT DIAGRAM
Copyright (c) NEXO S.A. All rights reserved. PDF ’ 08.01
NXAMP4x1
WARNING: This product contains chemicals known to the State of California to cause cancer, or birth defects or other reproductive harm.
DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT SO
EVER!
Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/flux
vapor!
If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food.
IMPORTANT NOTICE FOR THE UNITED KINGDOM
Connecting the Plug and Cord
WARNING:THIS APPARATUS MUST BE EARTHED
IMPORTANT. The wires in this mains lead are coloured in accordance with the following code:
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 or colored GREEN or colored 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.
GREEN-AND-YELLOW:EARTH
BLUE:NEUTRAL
BROWN:LIVE
■ WARNING
Components having special characteristics are marked and must be replaced with parts having specification equal to those originally
installed.
2
■ PANEL LAYOUT
A021675348 9
• Front Panel
NXAMP4x1
• Rear Panel
1 Power switch
2 Amplifier indicators
3 LCD display
4 Encoder
5 Navigation buttons (A & B)
6 Volume indicators
7 Mute buttons
8 Select buttons
9 Channel indicators
0 Air intakes
A Screw holes for handles
1 Mains connectors
2 Balanced audio inputs with link
3 Expansion slot
4 Power outputs
6 573241
5 RS-232 Firmware update port
6 GPIO port
7 Rear end mounting holes
3
NXAMP4x1
■ CIRCUIT BOARD LAYOUT
PAANL
(PA unit)
RS232-GPI
PSANL
INANL
OPT-AN
CONTROL
OUTANL
PAANL
(PA unit)
Rear Panel
OUTANL
RS232-GPI
OPT-AN
INANL
PSANL
Front Panel
(PA unit)(PA unit)
PN-AN
PAANLPAANL
4
C323C322
C317C316
C324C318
C325
C205
C344C354
C345C355
C357
C356
C348
C347
C319
C323C322
REAR
FRONT
C317C316
C324C318
C325
C205
C201C201
R213R213
C344C354
C345C355
C357
C356
C348
C347
C319
D305
220 ohms/
10W
220 ohms/
10W
220 ohms/
10W
220 ohms/
10W
220 ohms/10W220 ohms/10W
220 ohms/10W
220 ohms/10W220 ohms/10W
220 ohms/10W220 ohms/10W
220 ohms/10W
D306D306
1
3
4
2
CN316CN316
CN307 CN305CN307 CN305CN308CN309CN308
CN310CN310
CN309
6
7
5
■ SERVICE PRECAUTIONS
Safety measures
•Some component parts on the PSANH circuit board maintain a high voltage even when the power is switched off.
For this reason to av oid an electrical shock, do not touch
the upper metallic part of the following capacitors until
the remaining voltage has discharged.
Before starting the service work, connect discharging
resistors (220 ohms 10W) to the terminals indicated in
the figure below to discharge electricity. (7 points)
The required discharging time is about 10 seconds. Check
that the DC voltage between the terminals measures close
to 0 (zero) volts using a multi-meter to mak e sure that the
discharge is completed.
Note:
Do not touch the IC201 and its heat sink before discharging the C205.
5
NXAMP4x1
C205
C201
C316
D305
C354C344
C355C345
C356C347
C357C348
C318
C319
D306
C305
C307
C316
220 ohms/10W
220 ohms/10W
PSANL circuit diagram
C201
220 ohms/10W
7
C205
1
220 ohms/10W
2
220 ohms/10W
6
D305
D306
C316
C322
C317C323
C318
C324
C319C325
220 ohms/10W
3
C305
C354C344
C316
C355C345
C307
4
220 ohms/10W
220 ohms/10W
5
C356C347
C357C348
6
220 ohms/10W
■ OVERALL ASSEMBLY WIRING
115 ± 1 mm
25 ± 1 mm
90˚
90˚
This product has various cables (wires and connector assemblies) inside. To prevent touching component to the cables and/
or connection mistake, perform the cable connection and fixing cables according to the following instructions referring the
wiring diagram, P3 of the circuit diagram.
Notice: Since the following pictures are taken of the preproduction product, they may differ from the commodity products in
detail. However, the wiring and so on is not so differ between them. So, refer only to wiring and so on.
1.Wiring of the PN-AN circuit board
1)Process the flat cable (WK02100). (Fig. 1)
2)Connect the flat cable (WK02100) to the PN-AN circuit board. (Fig. 2)
3)Install the PN-AN circuit board to the front panel. (Fig. 3)
NXAMP4x1
115 ± 1 mm
90˚
Fig. 1
Fig. 2Fig. 3
90˚
25 ± 1 mm
2.Wiring of the power switch
1)Install the power switch to the front panel with its terminals set downward. (Fig. 4, 5)
Fig. 4Fig. 5
7
NXAMP4x1
Check
2)Confirm that the power switch is set to the off position as shown in the figure 6. (Fig. 6)
3)Twist the wires of the power switch assembly more than three times.
4)Connect the connector of the power switch assembly to the connector (CN103). (Fig. 7)
Check
Fig. 6
3.Wiring of the FAN
Connect the connector of the FAN to the each ter minal. (Fig. 8)
4.Attaching of the support cushion
Attach the support cushion (WN15950) at the specified
area on the pattern side of the CONTROL circuit board.
(Fig. 9)
Note: Be sure to remove the oil and the dust, etc. on the
attaching surface before attaching the support
cushion.
Fig. 7
Fig. 8
Fig. 9
8
5.Wiring of the AC-INLET
Cord holder
Cord holder
a)Set a cord holder before installing the PSAN circuit board
on the enclosure. (Fig. 10)
NXAMP4x1
b)Set a ferrite-core at the specified area on the PSAN cir-
cuit board, and fasten the ferrite-core with the cord holder .
(Fig. 11)
Fig. 10
Fig. 11
c)Pass the live and neutral wires of the AC-INLET through the ferrite core’s hole twice and wind them to the ferrite core.
Screw an each screw terminal to the specified terminal. (Fig. 12, 13)
Fasten the GND wire with a cord holder. (U destination) (Fig. 12)
Screwing torque:GND LINE 1.8N • m / L, N LINE 0.78 • m
Cord holder
Cord holder
Fig. 12Fig. 13
(U.S.A. model)(Chinese model)
d, e)Fix the wires to the terminal using the screws, and refer to the fig. 14 and fig. 15 for the direction of each terminal.
Fig. 14Fig. 15
9
NXAMP4x1
6.Wiring of the PA-UNIT
Connect the wires to the connectors (CN401, CN403). (Fig. 16, 17)
CN403
BLUE
CN401
RED
CN403
GREEN
Fig. 16Fig. 17
NOTE: The followings are wires to be connected.
CN401: WK02080
CN403: WK90770
Install this PA-UNIT on the left side of enclosure.
Hereafter, this unit is called PA-UNIT of CH1,
CH2.
The following figure describes a layout drawing of the PA-UNITs seen from the front panel. (Fig. 18)
*
NOTE: The followings are wires to be connected.
CN401: WK90790
CN403: WK17110
Install this PA-UNIT on the right side of enclosure.
Hereafter, this unit is called PA-UNIT of CH3,
CH4.
CN401
YELLOW
CH2
BLUE
CH1
RED
PSANHL
CH3
YELLOW
CH4
GREEN
Fig. 18
7.Wiring of the flat cable and fastening wires
Connect the following wires at first.
CN313: WK68760
CN201: WK68770
a)Install the RS232-GPI circuit board on the enclosure after connecting the wire (WM15830) to it.
b)Connect the wires (WK16830, WN52530) from each PA UNIT to the FASTON terminals of the OUTANL circuit board.
PA-UNIT (CH1, CH2) : WN52530 (ORANGE) –> CN805
WK16830 (YELLOW) –> CN806
PA-UNIT (CH3, CH4) : WN52530 (ORANGE) –> CN807
WK16830 (YELLOW) –> CN808
Then fold the wires (WK16830, WF44430) at the center of them, and fasten them with a cord holder. (Fig. 19)
c)Connect the wires (WK16820 x2) to the connectors (CN306, CN317) of the PSAN circuit board.
Connect the wire (WK14200) to the connector (CN202) of the PSAN circuit board.
Fasten these wires with a cord holder at the position as shown in the figure. (Fig. 19)
d)Connect the wire (WK14210) of PA-UNIT (CH3, CH4) to the connector (CN315).
Fasten the wire (WK14210) and the wires (WK16820 x2, WK14200) with a cord holder at the position where the wire (WK14210)
is vertically pulled from PA-UNIT. Before fastening, pull the wires (WK16820 x2, WK14200) toward the front panel side in
advance.
10
NXAMP4x1
a)
c)
b)
b)
e)d)
f)
f)
e)Connect the wire (WK14210) of PA-UNIT (CH1, CH2) to the connector (CN312).
Fasten the wire (WK14210) and the wire (WK02090) with a cord holder at the position where the wire (WK14210) is vertically
pulled from PA-UNIT. Before fastening, pull the wire (WK02090) toward the front panel side in advance.
f)Twist the wires (white, red and blac k) of PA-UNIT more than two times, and connect them to the FASTON terminals according
to the wire color displayed on the PSANL circuit board.
Then bend these wires, and fasten them with a cord holder. (Fig. 20)
a)
b)
c)
b)
e)
f)
d)
f)
Fig. 19
Fig. 20
11
NXAMP4x1
g)
h)
g)Fasten these wires (WK17900, WK17910 and WK94710) with a cord holder to the hexagonal spacer. (Fig. 21)
h)Bend the wire (WK14200) and wire (WK16820) connected to the connector (CN317), and fasten the wires (WK14210, WK16820
x 2 and WK14200) with a cord holder. (Fig. 21)
h)
g)
Fig. 21
Note: When connecting the connector assembly to the CONTROL circuit board, confirm that the connector housing pin
number of the connector assembly is the same as the connector pin number of the circuit board.
i)Fasten the wires (WK02080, WK90770) with a cord holder at the hole of the RS232-GPI circuit board. (Fig. 22)
j)Fasten the wires (WK02080, WK90770 and WK02070) with a cord holder at the hole of the enclosure.
Fasten the wires (WK90790, WK17110) with a cord holder at the hole of the enclosure. (Fig. 22)
k)Fasten the wires (WK90790, WK17110) with a cord holder at the hole of the OPT-AN circuit board. Then connect the flat cable
(WK02120). (Fig. 22)
l)Fasten the wires (WK02080, WK90770, WK90790, WK17110 and WK02070) with a cord holder at the position close to the
OPT-AN circuit board. (Fig. 22)
m) Bend the wire (WK02090), and fasten the wires (WK02090, WK68760 and WK68770) with a cord holder. (Fig. 22).
n)Bend the flat cable as shown in the figure. (Fig. 22)
12
i)
j)
*
1
j)
*
2
j)
*
2
j)
*
1
m)
o)
n)
l)
k)
k)
k)
The hole of the enclosure
NXAMP4x1
The hole of the enclosure
i)
j)
1
*
1
j)
*
n)
j)
2
*
j)
2
*
m)
o)
k)
k)
l)
Fig. 22
k)
13
NXAMP4x1
Switch knobSwitch knob
o)Bend the flat cable to avoid touching the top cover. (Fig. 23, 24)
Fig. 23Fig. 24
8.Color of the connectors connected to the connector CN012-CN015
Connect the connector assembly from the PA unit to the CONTROL circuit board as shown in the figure below. (Fig. 25)
CN012
RED
CN013
BLUE
CN014
YELLOW
CN015
GREEN
Fig. 25
9.Change of the destination
Set the knob position of the switch SW001 on the CONTROL circuit board as shown in the figure below. (Fig. 26, 27)
U destinationCHN destination
Switch knobSwitch knob
14
Fig. 26Fig. 27
10. Insulation distance between WK17110 and primary side capacitor
Perform wiring the connector assembly WK17110 with care so that its uncovered portion with the SUMI tube does not touch
the capacitor C316 on primary side of the PSANL circuit board. (Fig. 28, 29)
Fig. 28Fig. 29
NXAMP4x1
11. Insulation distance between WK14210 and primary side capacitor
Perform wiring the connector assembly WK14210 with care so that its uncovered portion with the SUMI tube does not touch
the capacitors C317 and C319 on primary side of the PSANL circuit board. (Fig. 30, 31)
C324C318
C325C319
Fig. 30
C323C322
C317C316
C324C318
C325C319
C323C322
C317C316
Fig. 31
15
NXAMP4x1
12. Prevention of touching WK02070 to connector terminal
Perform wiring the connector assembly WK02070 with care so that its uncovered portion with the SUMI tube does not touch
the bare terminal of the connector CN203 of the RS232-GPI circuit board. (Fig. 32)
GPI circuit board
IOAN circuit board
Fig. 32
GPI circuit board
IOAN circuit board
13. Adhesive cloth tape
Cover the two scre ws near R587 and R588 in each PA unit (190 and 230) with adhesive cloth tape (185 and 225) as shown in
the figure below. (Fig. 33)
16
Fig. 33
■ DISASSEMBLY PROCEDURES
1.Top Cover (Time required: about 3 minutes)
1-1.Remove the thirteen (13) screws marked [650]. (Fig. 1)
1-2.The top cover can then be removed. (Fig. 1)
NXAMP4x1
[650]
[650][650]
[650]: Bind Head Screw 4x8 MFZN2B3 (--)
(Fig. 1)
Top coverTop coverTop cover
[650]
17
NXAMP4x1
2.CONTROL Circuit Board, OPT angle and OPT-AN Circuit Board
(Time required: about 10 minutes)
2-1.Remove the top cover. (See procedure 1.)
2-2.Remove the four (4) screws marked [430]. (Fig. 2)
2-3.Disconnect the connector assemblies from other units connected to the CONTROL circuit board. (Fig. 2)
2-4.The CONTROL circuit board can then be removed. (Fig. 2)
2-5.Remove the three (3) screws marked [400] and the two (2) screws marked [410]. (Fig. 2)
2-6.Remove the OPT angle with the OPT-AN circuit board. (Fig. 2)
2-7.Remove the two (2) screws marked [380]. (Fig. 2)
2-8.The OPT-AN circuit board can then be removed. (Fig. 2)
OPT-AN
OPT angle
[380]: Bind Head Tapping Screw-S 3x6 MFZN2W3 (--)
[400]: Bind Head Tapping Screw-S 3x6 MFZN2W3 (--)
[410]: Bind Head Tapping Screw-S 3x6 MFZN2B3 (--)
[430]: Bind Head Tapping Screw-S 3x6 MFZN2W3 (--)
[380]
[410]
OPT angle
OPT-AN
[430]
[400]
CONTROL
[430][400][400]
18
(Fig. 2)
NXAMP4x1
3.OUTANL Circuit Board (Time required: about 15 minutes)
3-1.Remove the top cover. (See procedure 1.)
3-2.Remove the CONTROL circuit board and the OPT angle. (See procedure 2.)
3-3.Remove the eight (8) screws marked [280], the one (1) screw marked [290] and the one (1) screw marked [285]. (Fig. 3)
3-4.Disconnect the connector assemblies from other units connected to the OUTANL circuit board. (Fig. 3)
3-5.The OUTANL circuit board with the two (2) insulation sheets and the two (2) shields can then be removed. (Fig. 3)
3-6.Remove the three (3) plastic rivets marked [277]. (Fig. 3)
3-7.Remove the insulation sheet 1, the shield 1, the shield 2 and the insulation sheet 2 from the OUTANL circuit board. (Fig. 3)
[290]
OUTANL
Insulation
sheet 2
Shield 2
Shield 1
[277]
[277]: Plastic Rivet NRP-345 (--)
[280]: Flat Head Tapping Screw-B 3x8 MFZN2B3 (--)
[285]: Bind Head Tapping Screw-S 3x6 MFZN2W3 (--)
[290]: Bind Head Tapping Screw-B 3x8 MFZN2B3 (--)
Insulation sheet 1
(Fig. 3)
[280]
OUTANL
[285]
19
NXAMP4x1
4.PSANL Circuit Board (Time required: about 20 minutes)
4-1.Remove the top cover. (See procedure 1.)
4-2.Remove the CONTROL circuit Board and the OPT angle. (See procedure 2.)
4-3.Remove the OUTANL Circuit Board. (See procedure 3.)
4-5.Remove the two (2) screws marked [150], and remove the ACPS connector assembly. (Fig. 4)
4-6.Remove the nine (9) screws marked [100], the one (1) hexagonal spacers marked [90] and the one (1) hexagonal spacer
marked [95]. (Fig. 4)
4-7.Disconnect the connector assemblies from other units connected to the PSANL circuit board. (Fig. 4)
4-8.The PSANL circuit board can then be removed. (Fig. 4)
[150]
ACPS connector assembly
[100]
PSANL
[100]
[90]:Hexagonal Spacer H=89 B=5.5 (--)
[95]:Hexagonal Spacer H=41 B=5.5 (--)
[100]: Bind Head Tapping Screw-S 3x6 MFZN2W3 (--)
[150]: Flat Head Tapping Screw-B 3x8 MFZN2B3 (--) (U destination)
[150]: Bind Head Tapping Screw-B 3x8 MFZN2B3 (--) (O destination)
[100]
[95]
[90]
[100]
20
(Fig. 4)
NXAMP4x1
5.INANL Circuit Board
(Time required: about 7 minutes)
5-1.Remove the top cover. (See procedure 1.)
5-2.Remove the sixteen (16) screws marked [70]. (Fig. 5)
5-3.Disconnect the connector assembly from other unit con-
nected to the INANL circuit board. (Fig. 5)
5-4.The INANL circuit board can then be removed. (Fig. 5)
[70]
RS232-GPI
[330]
6.RS232-GPI Circuit Board
(Time required: about 7 minutes)
6-1.Remove the top cover. (See procedure 1.)
6-2.Remove the four (4) hexagonal lock screws marked
[330]. (Fig. 5)
6-3.Disconnect the flat cable from other unit connected to
the RS232-GPI circuit board. (Fig. 5)
6-4.The RS232-GPI circuit board can then be removed.
7.Left (CH1, CH2) PA unit
(Time required: about 15 minutes)
7-1.Remove the top cover. (See procedure 1.)
7-2.Remove the CONTROL circuit board and the OPT
angle. (See procedure 2.)
7-3.Remove the four (4) screws marked [670A], and re-
move the four (4) screw covers marked [660A]. (Fig. 6)
7-4.Remove the six (6) screws marked [220]. (Fig. 6)
7-5.Disconnect the connector assemblies that connects the
left PA unit and other units. (Fig. 6)
7-6.The left PA unit can then be removed. (Fig. 6)
[220]
[660A]
PA unit
[670A]
[660A]
8.Right (CH3, CH4) PA unit
(Time required: about 15 minutes)
8-1.Remove the top cover. (See procedure 1.)
8-2.Remove the CONTROL circuit board and the OPT
angle. (See procedure 2.)
8-3.Remove the four (4) screws marked [670B], and re-
move the four (4) screw covers marked [660B]. (Fig. 6)
8-4.Remove the six (6) screws marked [260]. (Fig. 6)
8-5.Disconnect the connector assemblies that connects the
right PA unit and other units. (Fig. 6)
8-6.The right PA unit can then be removed. (Fig. 6)
PA unit
[220]
[220]: Bind Head Screw 4x8 MFZN2B3 (--)
[260]: Bind Head Screw 4x8 MFZN2B3 (--)
[660A]: Screw Cover T5N (--)
[660B]: Screw Cover T5N (--)
[670A]: Bind Head Tapping Screw-B 3x8 MFZN2B3 (--)
[670B]: Bind Head Tapping Screw-B 3x8 MFZN2B3 (--)
(Fig. 6)
[660B]
[670B]
[660B]
[260]
22
NXAMP4x1
[500]
[500]
[40]
[510]
[590]
[590]
Front panel assembly
Front panel 2
Power switch
Power switch
HookHookHook
Hook
LCD assembly
LCD assembly
LCD unit
PN-AN
[40]
9.Front Panel Assembly
(Time required: about 6 minutes)
9-1.Remove the top cover. (See procedure 1.)
9-2.Remove the CONTROL circuit Board and the OPT
angle. (See procedure 2.)
9-3.Remove the eight (8) screws marked [590]. (Fig. 7)
9-4.Remove the front panel 2. (Fig. 7)
9-5.Disconnect the connector of the power switch assem-
bly connected to the PSANL circuit board. (Fig. 7)
9-6.Remove the eight (8) screws marked [510]. (Fig. 7)
9-7.Disconnect the flat cable from other unit connected to
the PN-AN circuit board. (Fig. 7)
9-8.The front panel assembly can the be removed. (Fig. 7)
10.PN-AN Circuit Board
(Time required: about 10 minutes)
10-1. Remove the top cover. (See procedure 1.)
10-2. Remove the front panel assembly. (See procedure 9.)
10-3. Remove the five (5) screws marked [500]. (Fig. 7)
10-4. Remove the LCD assembly. (Fig. 7)
10-5. Remove the four (4) nylon rivets [40]. (Fig. 7)
10-6. The PN-AN circuit board and the LCD unit can then be
separated. (Fig. 7)
[40]:Nylon Rivet (--)
[500]: Bind Head Screw 3x4 MFZN2B3 (--)
[510]: Flat Head Screw 4x8 MFZN2B3 (--)
[590]: Bind Head Tapping Screw-S 3x6 MFZN2B3 (--)
(Fig. 7)
23
NXAMP4x1
11.Left DC Fan (Time required: about 15 minutes)
11-1. Remove the top cover. (See procedure 1.)
11-2. Remove the CONTROL circuit board and the OPT
angle. (See procedure 2.)
11-3. Remove the front panel assembly. (See procedure 9.)
11-4. Remove the two (2) screws marked [40A] and the two
(2) hexagonal nuts marked [50A]. (Fig. 8)
11-5. Disconnect the connector of the left DC fan connected
to the PSANL circuit board. (Fig. 8)
11-6. The left DC fan can then be removed. (Fig. 8)
[50A]
DC fan
[50A]
[40A]
12.Right DC fan (Time required: about 15 min utes)
12-1. Remove the top cover. (See procedure 1.)
12-2. Remove the CONTROL circuit board and the OPT
angle. (See procedure 2.)
12-3. Remove the front panel assembly. (See procedure 9.)
12-4. Remove the two (2) screws marked [40B] and the two
(2) hexagonal nuts marked [50B]. (Fig. 8)
12-5. Disconnect the connector of the right DC fan connected
to the PSANL circuit board. (Fig. 8)
12-6. The right DC fan can then be removed. (Fig. 8)
13-1. Remove the top cover. (See procedure 1.)
13-2. Remove the CONTROL circuit Board and the OPT angle. (See procedure 2.)
13-3. Disconnect the connector of the power switch assembly connected to the PSANL circuit board. (Fig. 9)
13-4. Remove the front panel assembly. (See procedure 9.)
13-5. Release the four (4) hooks of the power switch, and remove the power switch from the front panel assembly. (Fig. 9)
Front panel assembly
[510]
[590]
Front panel 2
[590]
[510]: Flat Head Screw 4x8 MFZN2B3 (--)
[590]: Bind Head Tapping Screw-S 3x6 MFZN2B3 (--)
Note: See parts list for details of circuit board component parts.
NXAMP4x1
33
NXAMP4x1
• CONTROL Circuit Board
A
to PN-AN
CN001
N.C.
to PSANL
CN313
to PSANL
CN201
to OUTANL
CN809, CN810
34
Component side
A'
2NA-WJ97120-10
2
NXAMP4x1
A
to OUTANL
CN809, CN810
to PAANL
(CH1)
CN401
to PAANL
(CH2)
CN403
to PAANL
(CH3)
CN401
to PAANL
(CH4)
CN403
to INANL
W701
to OPT-AN
CN301
A'
2NA-WJ97120-10
to RS232-GPI
CN201
Component side
2
35
NXAMP4x1
• CONTROL Circuit Board
B
36
Pattern side
B'
2NA-WJ97120-10
2
NXAMP4x1
B
B'
2NA-WJ97120-10
Pattern side
2
37
NXAMP4x1
• INANL Circuit Board
to CONTROL
CN006
DCBA
BALANCED INPUTS
Component side
38
Pattern side
2NA-WJ97320-10
• OUTANL Circuit Board
NXAMP4x1
to PAANL (CH4)
W406 (
YELLOW
to PAANL (CH3)
W405 (
)
ORANGE
to PAANL (CH2)
W406 (
)
YELLOW
to PAANL (CH1)
W405 (
)
ORANGE
)
to PSANL
CN202
to CONTROL
to CONTROL
CN016
CN016
CN317
to PSANL
2NA-WJ97320-10
CN306
to PSANL
Speakon DSpeakon CSpeakon BSpeakon A
POWER OUTPUTS
Component side
39
NXAMP4x1
• OUTANL Circuit Board
40
Pattern side
2NA-WJ97320-10
• RS232-GPI Circuit Board
to CONTROL CN10
RS232
GPIO
NXAMP4x1
Component sidePattern side
• OPT-AN Circuit Board
to CONTROL CN017
Expansion slot
Component side
• LCD SPACER Circuit Board
Component sidePattern side
Pattern side
2NA-WJ97170-10
1
41
NXAMP4x1
• PN-AN Circuit Board
A
SELECT
PEAK
PROTECT
SIGNAL
1
MUTE
23
MUTEMUTE
42
Component side
A'
2NA-WJ97170-10
1
NXAMP4x1
A
Encoder
4A
vol
MUTE
B
AMP PROTECT
STAND-BY
POWER
to CONTROL
CN009
A'
2NA-WJ97170-10
Component side
1
43
NXAMP4x1
• PN-AN Circuit Board
B
44
Pattern side
B'
2NA-WJ97170-10
1
NXAMP4x1
B
B'
2NA-WJ97170-10
Pattern side
1
45
NXAMP4x1
• PAANL Circuit Board
to CONTROL
CN012, CN014
to OUTANL
CN805, CN807
Reduction: 9/10
A
to CONTROL
CN013, CN015
Component side
to OUTANL
CN806, CN808
A'
B
46
Pattern side
B'
2NA-WJ97310-10
1
Reduction: 9/10
A
NXAMP4x1
A'
B
to PSANL
CN312, CN315
to PSANL CN307, CN310
to PSANL CN316, CN309
to PSANL CN305, CN308
Component side
B'
2NA-WJ97310-10
Pattern side
1
47
NXAMP4x1
• PSANL Circuit Board
to OUTANL W802
to PAANL W404
to PAANL W402
to PAANL W401
to FUN
to CONTROL CN007
to PAANL
W403
Reduction: 7/10
A
to OUTANL CN202
to CONTROL CN011
to FUN
to PAANL CN401
to PAANL W402
to PAANL W404
to PAANL W403
to OUTANL
W805
7
6
8
5
9
4
10
3
11
2
12
1
48
Component side
B'
2NA-WJ97350-50
Reduction: 7/10
A
NXAMP4x1
B'
2NA-WJ97350-50
Component side
49
NXAMP4x1
• PSANL Circuit Board
Reduction: 7/10
B
50
Pattern side
B'
2NA-WJ97350-50
Reduction: 7/10
B
NXAMP4x1
6
7
5
8
4
9
3
10
2
11
1
12
B'
2NA-WJ97350-50
Pattern side
51
NXAMP4x1
■ TEST PROGRAM
1.Required items
Computer: DOS/V computer x1 (Pentium 200MHz or more, Windows XP, USB Port)
Software: Software for version up (JTAG Programmer)
Cable: RLINK-ST (USB-JTAG adapter)
Measuring equipment: Power consumption meter
Tools: RS-232C jig x1, GPI jig x1, SLOT jig x1
RS-232C jig
D-SUB 9 pin female connector
GPI jig
SW1
D-SUB 25 pin male connector
/ETH_CS
/ES_CS
SPI_CLK
SPI_MISO
SPI_MOSI
ES_SERIAL_RX
ES_SERIAL_TX
INT_FROM_ES
ES_GPI1
ES_GPI2
ES_GPI3
ES_I2S_DATA0
ES_I2S_DATA1
ES_MCLK
ES_SCLK
ES_LRCK
SOURCE_SEL
a-1
b-1
a-40 b-40
SLOT jig
3.3D
3.3D
XTAL
12.288MHz
Q0
Q1
LV169
Q2
Q3
Q0
Q1
LV169
Q2
Q3
2.Test connection imag e
52
SLOT, GPI, RS-232C jig
NXAMP
Measuring
instrument
NXAMP4x1
3.Operation
3-1. Entry of the test program
While holding down the [SELECT4], [MUTE4] and [A]
buttons simultaneously, turn the power switch on. The start
up screen appears on the LCD.
Start Up Screen
Boot1.00WAIT...
Then release your fingers from the buttons.
The test program starts and the test menu screen appears on the LCD.
Test Menu Screen
00CHOOSETEST<>
01SWITCH
3-2. Executing the test and judgment display
Select the desired test item from the table below using
the rotary encoder, and press the [B] button to start the
test.
Test Program List
01
SWITCH
02
ENCODER
03
LED
04
LCD
05
RS232
06
GPI
07
PORT (no use)
08
DSP
09
WORD CLOCK
10
12C
After executing the test, the display retur ns to the test
menu screen if the test result is OK. If an error occurs,
“ERROR” appears on the LCD and the test program is
stopped. In this case, tur n the power switch off and on
again as was done above in 3-1.
11
FLASH
12
FAN
13
SLOT
14
ATTENUATION
15
ANALOG
16
BRIDGE
17
CALIBRATION
18
STANDBY
19
QUIT
Press the switch displayed on the LCD as instructed.
If all instructed switches are OK, the display automatically returns to the test menu screen.
4-2. ENCODER test
00CHOOSETEST<>
02ENCODER
Press the [B] button to start the test, and the following
display appears.
02ENCODER
TURNRIGHT0
Turn the ENCODER knob clockwise. The 2nd line on the
display changes as shown below.
TURN RIGHT 0 –> • • • • • –> TURN RIGHT 19
The following display appears after the 2nd line on the
display reaches TURN RIGHT 19.
02ENCODER
TURNLEFT0
Turn the ENCODER knob counterclockwise. The 2nd line
on the display changes as shown below.
TURN LEFT 0 –> • • • • • –> TURN LEFT 19
The display returns to the test menu screen after the 2nd
line on the display reaches TURN LEFT 19.
4-3. LED test
00CHOOSETEST<>
03LED
Press the [B] button to start the test, and the following
display appears.
4.Outline of tests
4-1. SWITCH test
00CHOOSETEST<>
01SWITCH
Press the [B] button to start the test. The LCD shows one
by one the switch name to be tested as shown below.
01SWITCH
HITSELECTCH1
03LED
The LEDs automatically light up one by one in a specific
order as shown on the next page.
All LEDs will light at the same time after each LED individually has been tested. Confirm that each LED is lit
normally. If OK, press the [B] button to return the display
to the test menu screen.
53
NXAMP4x1
Lighting order
4-4. LCD test
00CHOOSETEST<>
04LCD
Press the [B] button to start the test.
First the following display appears.
04LCD
All the dots of the LCD go on and off two times. Finally, all
the dots of the LCD are lit. Confirm that all the dots of the
LCD have lit normally. If OK, press the [B] button to return the display to the test menu screen.
4-5. RS-232C test
00CHOOSETEST<>
05RS-232C
Connect the RS-232C jig to the R232C port of the
NXAMP4x1.
Then press the [B] button to start the test, and the following display appears.
05RS-232C
RS-232COK?
Press the [B] button to continue the test. The test e xecutes
automatically.
After executing the test, the following display appears.
(When an error occurs, the “ERROR” appears and the
test program is stopped.)
05RS-232C
RELEASERS-232C
Disconnect the RS-232C jig from the RC232C port. Press
the [B] button to return the display to the test menu screen.
4-6. GPI test
00CHOOSETEST<>
06GPI
Connect the GPI jig to the GPIO port of the NXAMP4x1.
Then press the [B] button to start the test, and the following display appears.
06GPI
GPO[0:4]TESTOK?
Switch the GPI jig to the GPO [0:4] position and press
the [B] button to continue the test.
The test executes automatically.
If normal, the following display appears. (If an error occurs, “ERROR” appears and the test program is stopped.)
54
06GPI
GPO[5:7]TESTOK?
NXAMP4x1
Switch the GPI jig to the GPO [5:7] position. Press the
[B] button to continue the test.
The test executes automatically. If the test result is OK,
the display automatically returns to the test menu screen.
(If an error occurs, “ERROR” appears and the test pro-
gram is stopped.)
Disconnect the GPI jig from the GPIO port.
4-7. PORT test
Test for factory inspection only.
4-8. DSP test
00CHOOSETEST<>
08DSP
Press the [B] button to start test. The following display
appears.
08DSP
CPUtoDSPTESTOK?
Press the [B] button to continue the test. The test e xecutes
automatically.
If normal, the following display appears.
Press the [B] button to start the test. The following display appears.
09WORDCLOCK
LRCK48kTESTOK?
Press the [B] button to continue the test. The test is executed automatically.
If normal, the following display appears.
09WORDCLOCK
LRCK96kTESTOK?
Press the [B] button to continue the test. The test is executed automatically.
If the test result is OK, the display automatically returns
to the test menu screen.
(If an error occurs, “ERROR” appears and the test pro-
gram is stopped.)
4-10. 12C test
00CHOOSETEST<>
1012C
08DSP
DSPtoDSPTESTOK?
Press the [B] button to continue the test. The test e xecutes
automatically.
If the test result is OK, the display automatically returns
to the test menu screen.
(If an error occurs, “ERROR” appears and the test pro-
gram is stopped.)
4-9. WORD CLOCK test
00CHOOSETEST<>
09WORDCLOCK
Press the [B] button to start the test. The following display appears.
1012C
12CTESTOK?
Press the [B] button to continue the test. The test e xecutes
automatically.
If the test result is OK, the display automatically returns
to the test menu screen.
(If an error occurs, “ERROR” appears and the test pro-
gram is stopped.)
55
NXAMP4x1
4-11. FLASH test
00CHOOSETEST<>
11FLASH
Press the [B] button to start the test. The following display appears.
11FLASH
FLASHTESTOK?
Press the [B] button to continue the test. The test e xecutes
automatically.
If the test result is OK, the display automatically returns
to the test menu screen.
(If an error occurs, “ERROR” appears and the test pro-
gram is stopped.)
4-12. FAN test
00CHOOSETEST<>
12FAN
Press the [B] button to start the test. The following display appears.
The FAN starts rotating at low speed.
12FAN
LOW
Check that the FAN rotates at low speed, and press the
[B] button to continue the test. The following display appears, and the FAN rotates at middle speed.
12FAN
MIDD
4-13. SLOT test
00CHOOSETEST<>
13SLOT
Rear panel
(Remove the [610] plate on the rear panel of the NXAMP4x1,
and insert the SLOT jig into the expansion slot.)
Press the [B] button to start the test. The test executes
automatically.
If every signal is normal, the following display appears
and the LED of the SLOT jig lights.
(If an error occurs, “ERROR” appears and the test pro-
gram is stopped.)
[610]
13SLOT
ANALOGTESTOK?
Input the 1 kHz, -10 ± 1 dBu sine wave to the channel 1
input terminal and confirm that the output voltage obtained
at the channel 1 output terminal is +19.1 ± 2.0 dBu.
If OK, press the [B] button to return the display to the test
menu screen.
4-14. ATTENUATION test
00CHOOSETEST<>
14ATTENUATION
Check that the FAN rotates at middle speed, and press
the [B] button to continue the test. The following display
appears, and the FAN rotates at high speed.
12FAN
HIGH
Check that the FAN rotates at high speed, and press the
[B] button to return the display to the test menu screen.
56
Press the [B] button to enter the attenuation test mode.
The following display appears.
14ATTENUATION
NOISETESTOK?
Perf orm the test according to the “Inspection with attenuation test mode”. (See page 60).
If OK, press the [B] button to return the display to the test
menu screen.
NXAMP4x1
4-15. ANALOG test
00CHOOSETEST<>
15ANALOG
Press the [B] button to enter the analog test mode. The
following display appears.
15ANALOG
ANALOGTESTOK?
Perform the test according to the “Inspection with analog
test mode”. (See page 61, 62).
Press the [B] button. The following display appears.
15ANALOG
MUTETESTOK?
If OK, press the [B] button to return the display to the test
menu screen.
4-16. BRIDGE test
00CHOOSETEST<>
16BRIDGE
Press the [B] button to enter the bridge test mode. The
following display appears.
16BRIDGE
ANALOGTESTOK?
Input the 1 kHz, +10 dBu sine wave to the channel 2 input terminal, and press the [B] button. The analog input
level is automatically calibrated, and the following display appears.
17CALIBRATION
CH3INPUTSIGNALOK?
Input the 1 kHz, +10 dBu sine wave to the channel 3 input terminal, and press the [B] button. The analog input
level is automatically calibrated, and the following display appears.
17CALIBRATION
CH4INPUTSIGNALOK?
Input the 1 kHz, +10 dBu sine wave to the channel 4 input terminal, and press the [B] button. The analog input
level is automatically calibrated, and the following display appears.
17CALIBRATION
CH1SETTO39.1dBu?
Input the 1 kHz, +10 dBu sine wave to the channel 1 input terminal.
Adjust the ENCODER so that the output voltage obtained
at the channel 1 output terminal is +39.1 dBu, and press
the [B] button.
The analog output level is automatically calibrated, and
the following display appears.
Perf orm the test according to the “Inspection with BRIDGE
mode”. (See page 63).
If OK, press the [B] button to return the display to the test
menu screen.
4-17. CALIBRATION
00CHOOSETEST<>
17CALIBRATION
Press the [B] button to start the calibration. The following
display appears.
17CALIBRATION
CH1INPUTSIGNALOK?
Input the 1 kHz, +10 dBu sine wave to the channel 1 input terminal, and press the [B] button. The analog input
level is automatically calibrated, and the following display appears.
17CALIBRATION
CH2INPUTSIGNALOK?
17CALIBRATION
CH2SETTO39.1dBu?
Input the 1 kHz, +10 dBu sine wave to the channel 2 input terminal.
Adjust the ENCODER so that the output voltage obtained
at the channel 2 output terminal is +39.1 dBu, and press
the [B] button.
The analog output level is automatically calibrated, and
the following display appears.
17CALIBRATION
CH3SETTO39.1dBu?
Input the 1 kHz, +10 dBu sine wave to the channel 3 input terminal.
Adjust the ENCODER so that the output voltage obtained
at the channel 3 output terminal is +39.1 dBu, and press
the [B] button.
The analog output level is automatically calibrated, and
the following display appears.
17CALIBRATION
CH4SETTO39.1dBu?
57
NXAMP4x1
Input the 1 kHz, +10 dBu sine wave to the channel 4 input terminal.
Adjust the ENCODER so that the output voltage obtained
at the channel 4 output terminal is +39.1 dBu, and press
the [B] button.
The analog output level is automatically calibrated, and
the following display appears.
17CALIBRATION
CH1OUTPUTSIGNALOK?
Adjust the input signal voltage so that the output voltage
obtained at the channel 1 output terminal is 24 Vrms (=
+29.8 dBu), and press the [B] button.
The output voltage monitor is automatically calibrated,
and the following display appears.
17CALIBRATION
CH2OUTPUTSIGNALOK?
Adjust the input signal voltage so that the output voltage
obtained at the channel 2 output terminal is 24 Vrms (=
+29.8 dBu), and press the [B] button.
The output voltage monitor is automatically calibrated,
and the following display appears.
17CALIBRATION
CH3OUTPUTSIGNALOK?
Adjust the input signal voltage so that the output voltage
obtained at the channel 3 output terminal is 24 Vrms (=
+29.8 dBu), and press the [B] button.
The output voltage monitor is automatically calibrated,
and the following display appears.
17CALIBRATION
CH4OUTPUTSIGNALOK?
Adjust the input signal voltage so that the output voltage
obtained at the channel 4 output terminal is 24 Vrms (=
+29.8 dBu), and press the [B] button.
The output voltage monitor is automatically calibrated,
and the following display appears.
17CALIBRATION
CH1CONNECT8OHMLOAD
Connect the 8 ohms resistor to the channel 1 output terminal.
Adjust the input signal voltage so that the output voltage
obtained at the channel 1 output terminal is 24 Vrms (=
+29.8 dBu), and press the [B] button.
The output current monitor is automatically calibrated,
and the following display appears.
17CALIBRATION
58
CH2CONNECT8OHMLOAD
Connect the 8 ohms resistor to the channel 2 output terminal.
Adjust the input signal voltage so that the output voltage
obtained at the channel 2 output terminal is 24 Vrms (=
+29.8 dBu), and press the [B] button.
The output current monitor is automatically calibrated,
and the following display appears.
17CALIBRATION
CH3CONNECT8OHMLOAD
Connect the 8 ohms resistor to the channel 3 output terminal.
Adjust the input signal voltage so that the output voltage
obtained at the channel 3 output terminal is 24 Vrms (=
+29.8 dBu), and press the [B] button.
The output current monitor is automatically calibrated,
and the following display appears.
17CALIBRATION
CH4CONNECT8OHMLOAD
Connect the 8 ohms resistor to the channel 4 output terminal.
Adjust the input signal voltage so that the output voltage
obtained at the channel 4 output terminal is 24 Vrms (=
+29.8 dBu), and press the [B] button.
The output current monitor is automatically calibrated,
and the display returns to the test menu screen.
(If an error occurs, “ERROR” appears and the test pro-
gram is stopped.)
4-18. STANDBY test
00CHOOSETEST<>
18STANDBY
Press the [B] button to enter the standby mode, and the
following display appears.
18STANDBY
Measure the primary power consumption, and check that
the measured value is 23 W or less. Press the [B] button
for one second or more, and the display retur ns to the
test menu screen.
4-19. QUIT (Exit the test program)
00CHOOSETEST<>
19QUIT
Press the [B] button to exit the test program, and the
NXAMP enters the ordinary mode.
■ INSPECTIONS
1.Measurement Conditions
1-1.Environment
•Normal temperature: From 10 ˚C to 35 ˚C
•Normal humidity: From 45 % to 85 %
1-2.Power Source
•When measuring the electrical characteristics, set the power supply voltage and frequency as specified in the tab le below.
Destination
U
CHN
1-3.Measuring Instruments
•Use a reliable measuring device capable of precisely measuring the specification values indicated in this document.
•Input impedance of the measuring instrument should be more than 1 MΩ.
•The noise level should be measured with a 22 Hz-22 kHz band pass filter.
When you use the Audio Analyzer System made by Audio Precision, Inc. for noise measurement, set the filter characteristics as follows.
BW: 22 Hz-22 kHz
Filter (Fltr) : None
Power supply voltage
120 V +2/-0 %
230 V +2/-0 %
Frequency
60 Hz
50 Hz
NXAMP4x1
1-4.Connections
Each input and output terminal of channels 1-4 are as shown in the figure below.
Ch4
OUT
Ch3
OUT
Ch2
OUT
Ch1
OUT
Ch3INCh2INCh1
Ch4
IN
Ch4
Ch3
LINK
LINK
OUT
OUT
Ch2
LINK
OUT
Fig. 1
1-4-1. Input connector
The XLR-3-31 (female) type connectors are used for channel 1-4 input terminals.
Condition: Balanced input
Wiring: pin 1 to ground, pin 2 to hot (+), pin 3 to cold (-)
1-4-2. Output connector
Neutrik SPEAKON connectors are used for output terminals in channels 1-4.
Connect the load resistor between pin 1+ and pin 1- of the Neutrik SPEAKON connector.
1-4-3. Load resistor
Use a load resistor with no inductivity and a power rating high enough to perform each test safely.
IN
Ch1
LINK
OUT
1-4-4. Link out connectors
XLR-3-32 (male) type connectors are used for input terminals in channels 1-4.
Condition: Balanced output
Wiring: pin 1 to ground, pin 2 to hot (+), pin 3 to cold (-)
59
NXAMP4x1
1-5.Other
0 dBu is defined as 0.775 Vrms in these inspections.
2.Inspection with ordinary mode
Condition:
•Ground each input terminal via a 600 Ω resistor.
•Do not connect the load resistor to the output terminal.
2-1.Power ON sequence
1) Turn the power switch on. Confirm that the latest firmware version appears on the LCD and the four (4) MUTE LEDs light
up.
Example of firmware version 1.00
--[v1.00]--(c)NEXO2007.
2) Confirm that all the fans start rotation at low speed within 4 seconds after turning the power switch on.
3) Confirm that the following display appears on the LCD within 18 ± 3 seconds after turning the power switch on. Also
confirm that the POWER LED and only one of the VOLUME LEDs for each channel light up.
-20.0-20.0-20.0-20.0Vol(dB)
[MAIN][MAIN][SUB][SUB]<>
2-2.Power consumption when idling
Measure the primary power consumption and confirm that the measured value is 70 ± 20 W.
2-3.Output terminal DC voltage
Measure the DC voltage (Vdc) of each output terminal and confirm that the measured value is Vdc = 0 ± 50 mV.
3.Inspection with attenuation test mode
Condition:
•Perform each test in this section in the attenuation test mode. (See page 56)
•Connect a 8 Ω load resistor to each output terminal.
•Ground each input terminal via a 600 Ω resistor.
3-1.Residual noise
Confirm that each output terminal’ s residual noise level is -65 dBu or less.
60
4.Inspection with analog test mode
Condition:
•Perform each test item in this section with the analog test mode of the test program. (See page 57)
•Unless otherwise specified, perform the test with a 8 Ω resistor is connected to each output terminal.
4-1.Link out
Input the 1 kHz, -10 dBu sine wav e to each input terminal and confirm that the output voltage obtained at each link out terminal
is -10 ± 0.5 dBu.
4-2.Efficiency
Input the 1 kHz sine wave to the channel 1 input terminal and confirm that the primary power consumption is 175 ± 10 W when
the output voltage obtained at the channel 1 output terminal is +29.2 dBu.
Perform the same test for channels 2-4 in the same manner.
4-3.Gain
Input the 1 kHz, 0 dBu sine wave to each input terminal and confirm that the output voltage obtained at each output terminal
is +29.1 ± 1.2 dBu.
NXAMP4x1
4-4.Frequency response
Perform the following test at each channel.
Input the 10 Hz, 1 kHz, 20 kHz, 0 dBu sine wave to the input terminal and one by one measure the output voltage obtained at
the output terminal for each frequency.
Confirm that the output voltage at 10 Hz is 0 ± 0.5 dB when compared with the output voltage at 1 kHz (0 dB).
Confirm that the output voltage at 20 kHz is +0.5 ± 0.5 dB when compared with the output voltage at 1 kHz (0 dB).
4-5.Distortion
Input the 1kHz sine wave to each channel input terminal and confirm that the distortion in each channel output terminal is 1.0
% or less when 500 W (with 8 ohms load) output is obtained for each terminal at the same time.
4-6.Maximum output
Connect the 4 ohms 500 W resistor to each output terminal.
Input the BURST signal as shown in fig. 2 to each input terminal and adjust the input signal le vel so that a Vburst voltage of 174
Vp-p (volt peak to peak) is obtained in each channel output terminals.
Measure the last wave of the BURST signal peak to peak by the oscilloscope's MEASURE function. Confirm that the measured voltage is 170 volt or more. (See fig. 2)
Note:Perform the test of all channels at the same time.
500 msec
1 msec
20 msec
Close-up
The center of the emission line shall
be adopted as the measurement value.
Signal
Cursor
Fig. 2
Vburst
The last one wave of burst signal
shall be measured.
61
NXAMP4x1
4-7.Channel separation
1) Ground the channel 2, channel 3 and channel 4 input terminals via a 600 Ω resistor.
Input the 1 kHz, 0 dBu sine wave to the channel 1 input terminal and measure the output voltage obtained at the channel
1 output terminal as the reference voltage (0 dB).
Confirm that the output voltage at the channel 2, channel 3 and channel 4 output terminals is -65 dB or less as compared
with the reference voltage.
2) Ground the channel 1, channel 3 and channel 4 input terminals via a 600 Ω resistor.
Input the 1 kHz, 0 dBu sine wave to the channel 2 input terminal and measure the output voltage obtained at the channel
2 output terminal as the reference voltage (0 dB).
Confirm that the output voltage at the channel 1, channel 3 and channel 4 output terminals is -65 dB or less as compared
with the reference voltage.
3) Ground the channel 1, channel 2 and channel 4 input terminals via a 600 Ω resistor.
Input the 1 kHz, 0 dBu sine wave to the channel 3 input terminal and measure the output voltage obtained at the channel
3 output terminal as the reference voltage (0 dB).
Confirm that the output voltage at the channel 1, channel 2 and channel 4 output terminals is -65 dB or less as compared
with the reference voltage.
4) Ground the channel 1, channel 2 and channel 3 input terminals via a 600 Ω resistor.
Input the 1 kHz, 0 dBu sine wave to the channel 4 input terminal and measure the output voltage obtained at the channel
4 output terminal as the reference voltage (0 dB).
Confirm that the output voltage at the channel 1, channel 2 and channel 3 output terminals is -65 dB or less as compared
with the reference voltage.
Note:Measure the output level with the 22 Hz-22 kHz band pass filter specified at 1-3.
4-8.Output noise level
With each input terminal grounded via a 600 Ω resistor, measure the noise le vel in each output terminal and confirm that the
measured value is -60 dBu or less.
Note:Measure the noise level with the 22 Hz-22 kHz band pass filter specified at 1-3.
4-9.Stability
With no load resistors connected to all output terminals, input the 1 kHz, -6.0 dBu square wave and measure the primary
power consumption (Wno_load).
With the 0.1 uF capacitor connected to all output terminals, input the 1 kHz, -6.0 dBu square wave and measure the primary
power consumption (Wcap_load).
Confirm that the following equation is satisfied.
Wcap_load-Wno_load = 10 W or less
62
5.Inspection with BRIDGE mode
Condition:
•Perform each test item in this section with the bridge test mode of the test program. (See page 57)
•Connect individually the 16 Ω load resistors to channel 1 and channel 3 output terminals.
•Keep the measurement reference of the measuring instrument in floating condition and connect it to the middle point of
each load resistors.
•Do not connect any resistor to channel 2 and channel 4 output terminals.
•The input terminals and output terminals of channel 2 and channel 4 are not used in this section.
5-1.Gain
Input the 1 kHz, 0 dBu sine wave to each input terminal and confirm that the output voltage obtained at each output terminal
is +29.1 ± 1.2 dBu.
5-2.Frequency response
Perform the following test at each channel.
Input the 10 Hz, 1 kHz, 20 kHz, 0 dBu sine wave to the input terminal and one by one measure the output voltage obtained at
the output terminal for each frequency.
Confirm the output voltage at 10 Hz is 0 ± 0.5 dB when compared with the output voltage at 1 kHz (0 dB).
Confirm the output voltage at 20 kHz is +0.5 ± 0.5 dB when compared with the output voltage at 1 kHz (0 dB).
NXAMP4x1
63
NXAMP4x1
■ UPDA TING THE FIRMWARE
1.Preparation
1-1.Downloading and installing the software for update
3) Double click the StandaloneJTAG_1_20, and the following
install screen appears. (Fig. 1)
4) Click the [Finish] button to start installing the software for
update.
5) Click the [Next] and [Yes] buttons to finish installing.
6) Restart the PC after completing the installation.
1-2.Connection
Connect the USB port of the PC to the connector CN005 of the
CONTROL circuit board installed in the NXAMP4x1 with the USBJTAG adapter (RLINK-ST).
Note:
When you connect the USB-JTAG adapter (RLINK-ST) for the
first time, the USB driver will be required. The USB driver is included in the downloaded file at previous step 1-1. Locate and
install the driver.
Fig. 1 Install screen
2.Updating operation
1) Turn the power switch of the NXAMP on.
2) Start up the installed JTAG Programmer.
3) Select new project from the project menu. The following “Create Project” screen appears. (Fig. 2)
4) Input the Project Name, Device Family and Device Name as the followings.
Project Name: an (any name may be used)
5) Click the [Create] button, and the following JTAG Programmer screen appears. (Fig. 3)
6) Click the [Browse] button to select the desired file.
Check the [All] at Select region.
Select Program/Verify at Select operation.
Note:
This operation is needed when you start up for the first time. Click the [Save] button to sav e the set up file so that this operation
will not be required again.
Fig. 3 JTAG Programmer screen
7) Click the [HW Setup] button, and the following hardware setting screen appears. (Fig. 4)
8) Select the RLink at Hardware selection.
Fig. 4 Hardware Setting screen
9) Click the [Execute] button, and the following JTAG-ISP Operations screen appears. (Fig. 5)
Fig. 5 JTAG-ISP Operations screen
10)Click the [
11)Restart the PC after the completion of the updating.
LD001LED Green (chip)GREEN SML-512MWSIGNAL-CH1(WJ83350)
LD002LED Green (chip)GREEN SML-512MWSIGNAL-CH2(WJ83350)
LD003LED Green (chip)GREEN SML-512MWSIGNAL-CH3(WJ83350)
LD004LED Green (chip)GREEN SML-512MWSIGNAL-CH4(WJ83350)
LD005LED Y ellow (chip)YELLOW SML-512WWPROTECT -CH1(WG96210)
LD006LED Y ellow (chip)YELLOW SML-512WWPROTECT -CH2(WG96210)
LD007LED Y ellow (chip)YELLOW SML-512WWPROTECT -CH3(WG96210)
LD008LED Y ellow (chip)YELLOW SML-512WWPROTECT -CH4(WG96210)
LD009LED Red (chip)SML-512UWPEAK-CH1(WD11160)
LD010LED Red (chip)SML-512UWPEAK-CH2(WD11160)
LD011LED Red (chip)SML-512UWPEAK-CH3(WD11160)
LD012LED Red (chip)SML-512UWPEAK-CH4(WD11160)
LD013LED Green (chip)GREEN SML-512MWPOWER(WJ83350)
LD014LED Y ellow (chip)YELLOW SML-512WWSTANDBY(WG96210)
LD015LED Red (chip)SML-512UWAMP-PROTECT(WD11160)
LD016LED White (chip)WHITE SMLE12WBC7WCH1-VOL.1(WK27910)
LD017LED White (chip)WHITE SMLE12WBC7WCH1-VOL.2(WK27910)
LD018LED White (chip)WHITE SMLE12WBC7WCH1-VOL.3(WK27910)
LD019LED White (chip)WHITE SMLE12WBC7WCH1-VOL.4(WK27910)
LD020LED White (chip)WHITE SMLE12WBC7WCH1-VOL.5(WK27910)
LD021LED White (chip)WHITE SMLE12WBC7WCH1-VOL.6(WK27910)
LD022LED White (chip)WHITE SMLE12WBC7WCH1-VOL.7(WK27910)
LD023LED White (chip)WHITE SMLE12WBC7WCH1-VOL.8(WK27910)
LD024LED White (chip)WHITE SMLE12WBC7WCH1-VOL.9(WK27910)
LD025LED White (chip)WHITE SMLE12WBC7WCH1-VOL.10(WK27910)
LD026LED White (chip)WHITE SMLE12WBC7WCH1-VOL.11(WK27910)
LD027LED White (chip)WHITE SMLE12WBC7WCH1-VOL.12(WK27910)
LD028LED White (chip)WHITE SMLE12WBC7WCH1-VOL.13(WK27910)
LD029LED White (chip)WHITE SMLE12WBC7WCH1-VOL.14(WK27910)
LD030LED Blue (chip)BLUE SMLE12BC7TCH1-VOL.15(WK15110)
LD032LED White (chip)WHITE SMLE12WBC7WCH2-VOL.1(WK27910)
LD033LED White (chip)WHITE SMLE12WBC7WCH2-VOL.2(WK27910)
LD034LED White (chip)WHITE SMLE12WBC7WCH2-VOL.3(WK27910)
LD035LED White (chip)WHITE SMLE12WBC7WCH2-VOL.4(WK27910)
LD036LED White (chip)WHITE SMLE12WBC7WCH2-VOL.5(WK27910)
LD037LED White (chip)WHITE SMLE12WBC7WCH2-VOL.6(WK27910)
LD038LED White (chip)WHITE SMLE12WBC7WCH2-VOL.7(WK27910)
LD039LED White (chip)WHITE SMLE12WBC7WCH2-VOL.8(WK27910)
LD040LED White (chip)WHITE SMLE12WBC7WCH2-VOL.9(WK27910)
LD041LED White (chip)WHITE SMLE12WBC7WCH2-VOL.10(WK27910)
LD042LED White (chip)WHITE SMLE12WBC7WCH2-VOL.11(WK27910)
LD043LED White (chip)WHITE SMLE12WBC7WCH2-VOL.12(WK27910)
LD044LED White (chip)WHITE SMLE12WBC7WCH2-VOL.13(WK27910)
LD045LED White (chip)WHITE SMLE12WBC7WCH2-VOL.14(WK27910)
LD046LED Blue (chip)BLUE SMLE12BC7TCH2-VOL.15(WK15110)
LD048LED White (chip)WHITE SMLE12WBC7WCH3-VOL.1(WK27910)
LD049LED White (chip)WHITE SMLE12WBC7WCH3-VOL.2(WK27910)
LD050LED White (chip)WHITE SMLE12WBC7WCH3-VOL.3(WK27910)
LD051LED White (chip)WHITE SMLE12WBC7WCH3-VOL.4(WK27910)
LD052LED White (chip)WHITE SMLE12WBC7WCH3-VOL.5(WK27910)
LD053LED White (chip)WHITE SMLE12WBC7WCH3-VOL.6(WK27910)
LD054LED White (chip)WHITE SMLE12WBC7WCH3-VOL.7(WK27910)
LD055LED White (chip)WHITE SMLE12WBC7WCH3-VOL.8(WK27910)
LD056LED White (chip)WHITE SMLE12WBC7WCH3-VOL.9(WK27910)
LD057LED White (chip)WHITE SMLE12WBC7WCH3-VOL.10(WK27910)
LD058LED White (chip)WHITE SMLE12WBC7WCH3-VOL.11(WK27910)
LD059LED White (chip)WHITE SMLE12WBC7WCH3-VOL.12(WK27910)
LD060LED White (chip)WHITE SMLE12WBC7WCH3-VOL.13(WK27910)
LD061LED White (chip)WHITE SMLE12WBC7WCH3-VOL.14(WK27910)
LD062LED Blue (chip)BLUE SMLE12BC7TCH3-VOL.15(WK15110)
LD064LED White (chip)WHITE SMLE12WBC7WCH4-VOL.1(WK27910)
LD065LED White (chip)WHITE SMLE12WBC7WCH4-VOL.2(WK27910)
LD066LED White (chip)WHITE SMLE12WBC7WCH4-VOL.3(WK27910)
LD067LED White (chip)WHITE SMLE12WBC7WCH4-VOL.4(WK27910)
LD068LED White (chip)WHITE SMLE12WBC7WCH4-VOL.5(WK27910)
LD069LED White (chip)WHITE SMLE12WBC7WCH4-VOL.6(WK27910)
LD070LED White (chip)WHITE SMLE12WBC7WCH4-VOL.7(WK27910)
LD071LED White (chip)WHITE SMLE12WBC7WCH4-VOL.8(WK27910)
LD072LED White (chip)WHITE SMLE12WBC7WCH4-VOL.9(WK27910)
LD073LED White (chip)WHITE SMLE12WBC7WCH4-VOL.10(WK27910)
LD074LED White (chip)WHITE SMLE12WBC7WCH4-VOL.11(WK27910)
LD075LED White (chip)WHITE SMLE12WBC7WCH4-VOL.12(WK27910)
LD076LED White (chip)WHITE SMLE12WBC7WCH4-VOL.13(WK27910)
LD077LED White (chip)WHITE SMLE12WBC7WCH4-VOL.14(WK27910)
LD078LED Blue (chip)BLUE SMLE12BC7TCH4-VOL.15(WK15110)
CN401Connector Base PostPH 5P TE(VB39010)
CN403Connector Base PostPH 5P TE(VB39010)
CN405Connector Base PostPH 2P TE(VB38980)
CN406Connector Base PostPH 2P TE(VB38980)