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NXAMP 4X4
Nexo NXAMP 4X4 Service Manual
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2
NXAMP4x4
Bottom section
（ボトム部）
(See page 4)
（4
ページ参照）
LCD Assembly
（LCDAss
y）
(See page 9)
（9
ページ参照）
51
0
520
530
540
550
555
560
755
570
575
580
590
600
605
61
0
620
630
635
635
636
640
650
655
650
660
660
680
690
695
700
71
0
730
720
74
0
74
0
750
76
0
76
5
770
780
790
800
800
800
800
81
0
81
0
81
0
81
0
81
0
81
0
820
820
820
820
580
11
0
11
0
a
690
690
CAUTION
The figure below shows the screw
marked [555] head shape.
To avoid the unit malfunction, make sure
the screw marked [555] head shape is
same as shown below before
assembling the OPT angle.
［555］
のネジ頭形状を下図に示します。
動作不良防止のため、
OPT
アングルを取り
付ける前に、
［555］
のネジ頭形状が下図のと
おりであることを確認してください。
■
OVERALL ASSEMBL
Y 1/2
（総組立
1/2）
92
94
Table of Contents
Contents
1
Connecting the Plug and Cord
2
Panel Layout
3
Front Panel
3
Rear Panel
3
Circuit Board Layout
4
Service Precautions
5
Safety Measures
5
PSANH Circuit Board
5
PSANH Circuit Diagram
6
Overall Assembly Wiring
7
Wiring of the PN-AN Circuit Board
7
Wiring of the Power Switch
8
Wiring of the FAN
9
Attaching of the Support Cushion
9
CHN Destination
10
U/J Destination
10
Wiring of the AC-INLET
10
Wiring of the PA Unit
12
Wiring and Fastening
14
Way of Fastening Wire
14
Change of the Destination
21
Insulation Distance between Wire (WK17110)
22
Adhesive Cloth Tape
22
Confirmation of Switch LED Lighting
23
Method of Fixing PN FFC Assembly
24
Disassembly Procedures
25
Top Cover and NX-DFLT Card
25
PSANHA Circuit Board
27
OUTANH Circuit Board
28
PSANHB Circuit Board
29
INANH Circuit Board
30
RS232-GPI Circuit Board
30
Upper Left (CH1) PA Unit
31
Upper Right (CH2) PA Unit
31
Lower Left (CH3) PA Unit
32
Lower Right (CH4) PA Unit
32
Front Panel Assembly
33
PN-AN Circuit Board
33
Upper Left DC Fan
34
Upper Right DC Fan
34
Lower Left DC Fan
35
Lower Right DC Fan
35
Power Switch
36
Lsi Pin Description
37
IC Block Diagram
38
Sn74Abt245Bnsr (Xu009A0)
42
Circuit Boards
44
CONTROL Circuit Board
46
PAANH Circuit Board
56
PSANHA, PSANHB Circuit Board
58
Test Connection Image
64
Test Program
64
Required Items
64
Operation
65
Entry of the Test Program
65
ENCODER Test
65
Executing the Test and Judgment Display
65
RS-232C Test
66
GPI Test
66
LCD Test
66
Lighting Order
66
PORT Test
67
DSP Test
67
12C Test
67
WORD CLOCK Test
67
FLASH Test
68
SLOT Test
68
FAN Test
68
ATTENUATION Test
68
Calibration
69
BRIDGE Test
69
ANALOG Test
69
STANDBY Test
70
Quit
70
Inspections
78
Inspection with Ordinary Mode
79
Power on Sequence
79
Power Consumption When Idling
79
PEAK Indicator
79
Link out
80
Efficiency
80
Frequency Response
80
Distortion
80
Channel Separation
81
Output Noise Level
81
Stability
81
Confirming Operation of NX-DFLT Card
82
Gain
82
Inspection with BRIDGE Mode
82
Updating the Firmware
88
Downloading and Installing the Software for Update
88
Connection
88
Updating Operation
88
JTAG Programmer Screen
89
JTAG-ISP Operations Screen
89
Hardware Setting Screen
89
Table of Contents
92
Parts List
92
Warning
92
Overall Assembly
93
Pa Unit
98
Lcd Assembly
100
Details on PSANHB Circuit Board
101
Details on PSANHA Circuit Board
101
Details on PAANH Circuit Board
101
Locations of Heat Sink Units
101
Heat Sink Unit L100
102
Heat Sink Unit L100
103
Heat Sink Unit L60
104
Heat Sink Unit L60
105
Heat Sink Unit L50
106
Heat Sink Unit L50
107
Heat Sink Unit Osh
108
Heat Sink Unit
109
Heat Sink Unit Mp-5
110
Electrical Parts
111
Block Diagram
131
Circuit Diagram
131
Notation for Circuit Diagrams
131
IC & Diode Figures
132
Wiring Diagram
133
Block Diagram
134
Block Diagram
135
Block Diagram
136
Block Diagram
137
Block Diagram
138
Nxamp4X4 LEVEL DIAGRAM
138
Parts List
139
Parts List
140
Parts List
141
Parts List
142
Parts List
143
Parts List
144
Inanh
145
Parts List
145
Outanh
146
Parts List
146
Pn-An
147
Parts List
147
Parts List
148
Rs232-Gpi
148
Opt-An, Nx-Dflt
149
Parts List
149
Paanh
150
Parts List
150
Psanha/Psanhb
151
Parts List
151
Parts List
152
Parts List
153
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Nexo NXAMP 4X4 Specifications
General
Brand
Nexo
Model
NXAMP 4X4
Category
Recording Equipment
Language
English
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