Yamaha NXAMP-4-X-1 Service Manual
SERVICE MANUAL
■ CONTENTS
PANEL LAYOUT .......................................................................................... 3
CIRCUIT BOARD LAYOUT ......................................................................... 4
SERVICE PRECAUTIONS ........................................................................... 5
OVERALL ASSEMBLY WIRING .................................................................. 7
DISASSEMBLY PROCEDURES ................................................................ 17
LSI PIN DESCRIPTION .............................................................................. 26
IC BLOCK DIAGRAM ................................................................................ 27
CIRCUIT BOARDS ..................................................................................... 33
TEST PROGRAM ....................................................................................... 52
INSPECTIONS ...........................................................................................59
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
A0 216 7 53 48 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 5 73 24 1
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
C323 C322
C317 C316
C324 C318
C325
C205
C344 C354
C345 C355
C357
C356
C348
C347
C319
C323 C322
REAR
FRONT
C317 C316
C324 C318
C325
C205
C201C201
R213R213
C344 C354
C345 C355
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 CN305 CN308 CN309CN308
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.
Capacitors Discharging point
C316, C317, C322, C323
C318, C319, C324, C325
C344, C354
C345, C355
C347, C356
C348, C357
C205
PSANL circuit board
1
D305: + pin <=> D305: - pin
2
D306: + pin <=> D306: - pin
3
CN305 <=> CN316
4
CN307 <=> CN316
5
CN308 <=> CN309
6
CN310 <=> CN309
7
R213: lead <=> C201
NXAMP4x1
[Discharging Method]
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
C317 C323
C318
C324
C319 C325
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. 2 Fig. 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. 4 Fig. 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. 12 Fig. 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. 14 Fig. 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. 16 Fig. 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 knob Switch knob
o) Bend the flat cable to avoid touching the top cover. (Fig. 23, 24)
Fig. 23 Fig. 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 destination CHN destination
Switch knob Switch knob
14
Fig. 26 Fig. 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. 28 Fig. 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)
C324 C318
C325 C319
Fig. 30
C323 C322
C317 C316
C324 C318
C325 C319
C323 C322
C317 C316
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 cover Top 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.
(Fig. 5)
INANL
[70]: Bind Head Tapping Screw-B 2.6x8 MFZN2B3 (--)
[330]: Hexagonal Lock Screw (--)
(Fig. 5)
21
NXAMP4x1
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)
[50B]
[40B]
[40A]: Bind Head Screw 4x35 MFZN2W3 SP (--)
[40B]: Bind Head Screw 4x35 MFZN2W3 SP (--)
[50A]: Hexagonal Nut M4 #1 (--)
[50B]: Hexagonal Nut M4 #1 (--)
(Fig. 8)
DC fan
[50B]
24
NXAMP4x1
Hook
13. Power switch (Time required: about 15 minutes)
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 (--)
Power switch
(Fig. 9)
Power switch
Hook
Hook
Hook
25
NXAMP4x1
■ LSI PIN DESCRIPTION
• PCM1803ADBR (X7357B0) A/D CONVERTER CONTROL: IC035, IC036, IC037, IC038
PIN
NO.
10
11
12
13
14
15
16
17
18
19
20
(1) Schmitt trigger input
(2) Schmitt trigger input with internal pulldown (50 kΩ, typically), 5 V tolerant
(3) Schmitt trigger input, 5 V tolerant
NAME
1
2
3
4
5
6
7
8
9
VINL
V
INR
REF1
V
V
REF2
VCC
AGND
PDWN
BYPAS
TEST
LRCK
BCK
DOUT
DGND
V
DD
SCKI
OSR
FMT0
FMT1
MODE0
MODE1
I/O FUNCTION
I
Analog input, L-channel
Analog input, R-channel
I
–
Reference voltage 1 decoupling capacitor
–
Reference voltage 2 decoupling capacitor
Analog power supply, 5 V
–
–
Analog GND
I
Power-down control, active-low
I
HPF bypass control / LOW: Normal mode (dc reject); HIGH: Bypass mode (through)
I
Test, must be connected to DGND
I/O
Audio data latch enable input/output
I/O
Audio data bit clock input/output
O
Audio data digital output
–
Digital GND
–
Digital power supply, 3.3 V
I
System clock input: 256 fs, 384 fs, 512 fs or 768 fs
I
Oversampling ratio select input / LOW: x 64 fs, HIGH: x 128 fs
I
Audio data format select input 0 / See data format section
I
Audio data format select input 1 / See data format section
I
Mode select input 0 / See data format section
I
Mode select input 1 / See data format section
(2)
(2)
(1)
(1)
(3)
(2)
(2)
(2)
(2)
(2)
(2)
26
■ IC BLOCK DIAGRAM
NXAMP4x1
• 74HCT273PW,118 (X8681A0)
D-type Flip Flop
PN-AN: IC002, 003
D0
CP
MR
GND
1
20
V
2
Q0
3
D0
4
D1
5
Q1
6
Q2
7
D2
8
D3
9
Q3
10
CC
19
Q7
18
D7
CP
17
D6
16
Q6
MR
15
Q5
14
D5
13
D4
12
Q4
11
CP
FF1
R
D
D4
CP
FF5
R
D
• 74LVC169PW,118 (X8482A0)
Binaly Counter
CONTROL: IC044, 045
D1
QD
Q
Q0
D5
QD
Q
Q4
D2
QD
CP
FF2
Q
R
D
Q1
D6
QD
CP
FF6
Q
R
D
Q5
D3
QD
CP
FF3
Q
R
D
QD
CP
FF7
Q
R
D
QD
CP
FF4
Q
R
D
Q2
Q6
Q3
D7
QD
CP
FF8
Q
R
D
Q7
U/D
CEP
GND
1
16
CP
2
15
D0
3
14
D1
4
13
5
12
D2
6
11
D3
7
10
8
9
V
TC
Q0
Q1
Q2
Q3
CET
PE
3
DC
CC
4
D1
5
D2
6
D3
9
PE
7
CEP
10
CET
2
CP
1
U/D
Q
D
CP
Q
Q
D
CP
Q
Q
D
CP
Q
Q
D
CP
Q
14
Q0
13
Q1
12
Q2
11
Q3
15
TC
• 74HCT4514PW,118 (X8630A0)
Decoder
PN-AN: IC004-007
A
0
V
24
Q
Q
Q
Q
Q
Q
Q
Q
GND
1
LE
A
2
0
A
3
1
4
7
5
8
6
5
7
4
8
3
9
1
10
2
11
0
12
CC
23
E
A
22
3
21
A
2
20
19
18
17
16
15
14
13
A
Q
1
10
Q
11
Q
8
Q
9
Q
14
Q
15
Q
A
12
2
Q
13
A
3
LE
latch
latch
latch
latch
• CS3318-CQZ (X8486A0)
Volume Controller
CONTROL: IC001
REFO1
OUT1
OUT2
REFO2
IN2
VA-
VA+
Q
0
S
D
Q
1
Q
R
D
S
D
Q
2
Q
R
D
S
D
Q
3
Q
R
D
S
D
Q
4
Q
R
D
E
Q
1
Q
2
Q
3
Q
4
Q
5
Q
6
Q
7
Q
8
Q
9
Q
10
Q
11
Q
12
Q
13
Q
14
Q
15
8-channel
Analog
Inputs
I2C/SPI
Serial
Control
REFI1
RESET
MUTE
SCL/CCLK
SDA/MOSI
AD0/CS
ENOut
DGND
REFI8
±8V to ±9V
+3.3V
4847464544434241403938
1
IN1
2
3
4
5
6
7
8
9
VD
10
11
IN8
12
1314151617181920212223
OUT8
REFO8
5
I2C/SPI
Control
Port
VA+
VA-
OUT7
Zero Crossing
Detector
REFO7
IN7
REFI2
REFI7
REFI3
REFI8
OUT3
REFO3
IN3
37
36
VA-
35
VA+
34
OUT5
33
REFO4
32
IN4
31
REFI4
30
REFI5
29
IN5
REFO5
28
OUT5
27
VA-
26
VA+
25
24
IN6
OUT6
REFO6
8-channel
3
Analog
Outputs
27
NXAMP4x1
• CS4272-CZZR (X8487A0)
CODEC
CONTROL: IC012, 013
3.3V to 5V2.5V to 5V
Hardware or
I2C/SPI
Control Data
Reset
Serial
Audio
Intput
Serial
Audio
Output
Registor/Hardware
Level Translator Level Translator
Configuration
Volume
Control
Volume
Control
PCM Serial Interface/Loopback
• IR2110 (X2382A02)
Driver
PSANL: IC302, 303
Selectable
Interpolation
Filter
Mixer
Selectable
Interpolation
Filter
High Pass Filter and
DC Offset Calibration
High Pass Filter and
DC Offset Calibration
Internal Voltage
Reference
∆∑ Modulator
∆∑ Modulator
LOW-Latency
Anti-Alias Filter
LOW-Latency
Anti-Alias Filter
Internal
Oscilator
5V
External
Mute Control
Switched Capasito
DAC and Filterr
Switched Capasito
DAC and Filterr
Multibit
Oversampling
ADC
Multibit
Oversampling
ADC
Left and
Right Mute
Controls
Left
Differential
Output
Right
Differential
Output
Left
Differential
Input
Right
Differential
Input
• DSPB56371AF180 (X8489A0)
DSP
CONTROL: IC022, 023
5
SHI
Interface
2
EXTAL
RESET
PINIT/NMI
212
Triple
Timer
DAX
Address
Generation
Unit
Six Channel
DAM Unit
Bootstrap
ROM
Internal
Data
Bus
Switch
Clock
Gen-
erator
PLL
ESAI
Interface
12
ESAI_1
Interface
Program
Interruput
Controller
Expansion Area
PIO_EB
11
GPIO
Peripheral
Program
Decode
Controller
MODA/IRQA
MODB/IRQB
MODC/IRQC
MODD/IRQD
EFCOP
Program
Address
Controller
Program
RAM
4K x 24
ROM
64K x 24
YAB
PM_EB
XAB
PAB
DAB
24-Bit
DSP56300
Core
DDB
YDB
XDB
PDB
GDB
24 x 24+56 56-bit MAC
Two 56-bit Accumulators
Memory Expansion Area
X Data
RAM
36K x 24
ROM
32K x 24
XM_EB
Data ALU
56-it barrel Shifter
Y Data
RAM
48K x 24
ROM
32K x 24
YM_EB
Power
Mngmnt.
JTAG
OnCE
4
TM
COM
VCC
1
LO
2
3
4
5
VS
6
VB
HO
7
14
13
VSS
12
LIN
11
SD
10
HIN
9
VDD
8
• LD1117STR (X8495A0)
Regulator
CONTROL: IC024
VOLTAGE
GENERATOR
CURRENT
GENERATOR
V
B
HV
UV
9
V
DD
10
HIN
11
SD
LIN
12
V
SS
13
Q
R
S
S
Q
R
VDD/V
LEVEL
SHIFT
VDD/V
LEVEL
SHIFT
CC
PULSE
PULSE
GEN
GEN
CC
LEVEL
SHIFT
DETECT
PULSE
FILTER
UV
DETECT
DELAY
R
Q
R
S
6
7
HO
5
V
S
3
CC
V
LO
1
2
COM
• MAX3221CPWR (X2757A0)
RS-232C Driver
CONTROL: IC041
V
IN
C1+
C1–
C2+
C2–
RIN
EN
1
2
3
V+
4
5
6
7
V–
8
16
15
14
13
12
11
10
9
FORCEOFF
V
CC
GND
DOUT
FORCEON
DIN
INVALID
ROUT
DIN
11
13
DOUT
THERMAL
COMPENSATION
28
THERMAL
PROTECTION
FORCEOFF
V
OUT
GND
16
12
FORCEON
9 8
ROUT
Auto-powerdown
10
1
INVALID
RIN
EN
NXAMP4x1
CATHOD
REFERENCE
ANODE
(A)
CATHODE
(K)
REFERENCE (R)
ANODE
CS#
SO
GND
VCC
HOLD#
1
2
3
4
5
6
7
8
SI
WP#
SCLK
Data
Register
SRAM
Buffer
Output
Buffer
Sense
Amplifire
HV
Generator
Mode
Logic
SO
State
Machine
SI
Y-Decoder
Memory Array
Page Buffer
X-Decoder
CS#
Address
Generator
SCLK
Clock Generator
1
2
3
4
-V
8
7
6
5
Output A
+V
Non-Inverting
Input A
-DC Voltage Supply
+DC Voltage
Supply
Output B
Inverting
Input B
Non-Inverting
Input B
Inverting
Input A
+-
+-
1
2
3
4-V
8
7
6
5
Output A
+V
Non-Inverting
Input A
Ground
+DC Voltage
Supply
Output B
Inverting
Input B
Non-Inverting
Input B
Inverting
Input A
+-
+-
COMMON
OUTPUT
R23
R24
R13
R14
R20
R17
D3
Q22
Q21
Q25
Q20
Q24
Q18
Q9
R18
R19
R16R15R21R12R11
R10
Q17
R9R8
R7
R5
R4
D2D1
R6
C1 C2
C3
R22
Q11
Q13
Q14
Q15
Q19
Q16
Q23
Q8
Q7
Q2
Q1
Q6
Q5
Q3
Q10
Q12
Q4
R1
R2
R3
INPUT
INPUT
OUTPUT
GND
INPUT
OUTPUT
GND
• MX25L1605AM2C-12G (X8718A0)
Flash Memory
CONTROL: IC039
• NJM431U (TE1) (X6770A0)
SHUNT Regulator
PSANL: IC204
• NJM2068M-D (X3505A0)
Operational Amplifier
CONTROL: IC002-005, 008-011, 018-021, 028-034
INANL: IC701, 702
OUTANL: IC801, 802
• NJM79M09DL1A (X5366A0)
Regulator
CONTROL: IC007
• NJM7815FA (XD853A0)
Regulator +15V
PSANL: IC202, 203
• NJM78M09DL1A (XZ940A0)
Regulator
CONTROL: IC006
• NJM2904V (TE1) (XR532A0)
Operational Amplifier
CONTROL: IC047, 048, 050, 052
29
NXAMP4x1
• NJU7630-M (X8682A0)
Regulator
PSANL: IC205
V+
1V
Vref
Soft Start
2
ER.AMP
UVLO
Latch
2µA
SCP
2kΩ
0.5
R
1V
1V
FB
IN-
SCP
3
4
5
PWM
OSC
0.5V
67 8
RT
GND
R
T
DTC
A
T
0.8V
0.2V
Buffer
• PCM1803ADBR (X7357B0)
A/D Converter
CONTROL: IC035-038
Delta-Sigma
Modulator
Delta-Sigma
Modulator
DGND
20
MODE1
19
MODE0
18
FMT1
17
FMT0
16
OSR
15
SCKI
14
V
DD
13
DGND
12
DOUT
11
BCK
BCK
LRCK
x 1/64, x 1/128
Decimation
Filter
With
High-Pass Filter
Clock and Timing Control
V
DD
Serial
Interface
Mode/
Format
Control
DOUT
FMT0
FMT1
MODE0
MODE1
BYPAS
TEST
OSR
PDWN
SCKI
1
VINL
2
R
V
IN
3
V
1
REF
4
2
V
REF
5
V
CC
6
AGND
7
PDWN
TEST
LRCK
Reference
CC
8
9
10
Power Supply
AGNDV
BYPAS
V
L
OUT
1
IN
1
V
REF
V
2
REF
V
R
IN
• PQ1CX12H2ZP (X6188A0)
Regulator
PSANL: IC208
1 8
V
IN
Drive
2
V
B
Circuit
Comparator
Over
current
Detection
circuit
Over
Heat
Detection
circuit
Q
R
F/F
S
6, 7
COM
Oscill
ator
fo Conversion
circuit
Voltage
regulator
ON/OFF
circuit
+
-
AMP
Soft
Start
• SG2525AN (X8960A0)
PW Modulator
PSANL: IC301
V
REF
OSC.
REF.
REG.
16
U.V.
LOCK
OUT
TO INTRENAL
CIRCUITRY
OSCILLATOR
OUTPUT
4
FLIP
FLOP
R
COMP.
V
5kΩ
S
PWM
LATCH
S
REF
50µA
NOR
NOR
OR
OR
V
13
C
OUTPUT A
11
OUTPUT B
14
SG1525A OUTPUT STAGE
V
13
C
OUTPUT A
11
OUTPUT B
14
SG1527A OUTPUT STAGE
Vo
V
15
i
12
GROUND
4
ON/OFF
5
+
V
ref
VNCadj
3
SYNC.
DISCHARGE
COMP.
INV.INPUT
N.I.INPUT
SOFT-START
SHUTDOWN
3
R
6
T
C
5
T
7
9
1
ERROR
AMP.
2
8
5kΩ
10
30
Loading...