JVC AX-M9000 User manual

SERVICE MANUAL
No.20933
Apr.2001
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
AX-M9000
AX-M9000
Area Suffix
E Continental Europe
MONAURAL INTEGRATED AMPLIFIER
Contents
Safety precautions --------------------------------------------------------1-2
Disassembly method -----------------------------------------------------1-3
Adjustment method -------------------------------------------------------1-10
Description of major ICs -------------------------------------------------1-11~21
PHASE SPEAKER
12 1 -180û 2 123
DOWN UP
45 6
PRESENCE EXT
PROCESSOR LINE
MUTE
GAIN CONTROL
ATT
SLEEP EACH
MONAURAL INTEGRATED AMPLIFIER
AX M9000
STANDBY/ON
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AX-M9000
1-2
1. This design of this product contains special hardware and many circuits and components specially for safety
purposes. For continued protection, no changes should be made to the original design unless authorized in
writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services
should be performed by qualified personnel only.
2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product
should not be made. Any design alterations or additions will void the manufacturer`s warranty and will further
relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.
3. Many electrical and mechanical parts in the products have special safety-related characteristics. These
characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily
be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which
have these special safety characteristics are identified in the Parts List of Service Manual. Electrical
components having such features are identified by shading on the schematics and by ( ) on the Parts List in
the Service Manual. The use of a substitute replacement which does not have the same safety characteristics
as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or
other hazards.
4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be
separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of
electric shock and fire hazard. When service is required, the original lead routing and dress should be
observed, and it should be confirmed that they have been returned to normal, after re-assembling.
5. Leakage currnet check (Electrical shock hazard testing)
After re-assembling the product, always perform an isolation check on the exposed metal parts of the product
(antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the
product is safe to operate without danger of electrical shock.
Do not use a line isolation transformer during this check.
Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage
current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return
path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).
Alternate check method
Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more
sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor
between an exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to eachexposed metal part,
particularly any exposed metal part having a return path to
the chassis, and meausre the AC voltage across the resistor.
Now, reverse the plug in the AC outlet and repeat each
measurement. voltage measured Any must not exceed 0.75 V
AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).
1. This equipment has been designed and manufactured to meet international safety standards.
2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
3. Repairs must be made in accordance with the relevant safety standards.
4. It is essential that safety critical components are replaced by approved parts.
5. If mains voltage selector is provided, check setting for local voltage.
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE
!
Burrs formed during molding may
be left over on some parts of the
chassis. Therefore, pay attention to
such burrs in the case of
preforming repair of this system.
In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the
parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " "
mark nearby are critical for safety.
When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer.
(Except the JC version)
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AX-M9000
1-3
Remove the three screws A attaching the metal
cover on the back of the body.
Remove the four screws B attaching the metal cover
on both sides of the body using a hexagon wrench.
Draw the metal cover upward from the behind while
pulling the both sides of the lower part of the metal
cover outward.
1.
2.
3.
Disassembly method
Removing the metal cover (See Fig. 1)
Prior to performing the following procedure, remove
the metal cover.
Remove the six screws C attaching the top plate
using a hexagon wrench.
Remove the six screws D and tow screws D'
attaching the front panel assembly from the back of
the body.
Remove the four screws E attaching the front panel
assembly from the upper part of the body.
Remove the four screws F attaching the front panel
assembly on both sides of the body.
Disconnect the harness from the connectors CN601,
CN602, CN603, CN604 and CN605 of the system
control board assembly.
Remove the screw G attaching the earth wire.
* The front panel assembly of this machine
comprises the three sets - the front panel
(left), front panel (right) and sub-panel (center).
1.
2.
3.
4.
5.
6.
Removing the front panel assembly
(See Fig. 2 to 5)
Fig.2
Fig.3
B 2
A
C
E
D
Fig.4
CN602 CN603 CN604
CN601 CN605
Metal cover
Fig.1
Top plate
Front panel
assembly
Front panel assembly
System control board assembly
Fig.5
B 2
F 2F 2
G
Earth wire
D'
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AX-M9000
1-4
Removing the rear panel (See Fig.6 to 9)
1.
2.
3.
4.
5.
Prior to performing the following procedure, remove
the metal cover and front panel assembly.
Remove the four screws H attaching the rear panel
on the back of the set.
Remove the eight screws I attaching the rear panel
on the upper part of the set.
Remove the six screws J, two screws K, nine screws
L and one screw M attaching the rear panel.
Draw the rear panel upward from the behind at the
legs while pulling the rear panel outward.
Remove the four screws N attaching the speaker
output cord.
* If necessary, remove the power plug, connector
clamp, etc.
Fig.6
Fig.7
Fig.8
H
Fig.9
I
I
J
L
J
K
J
Rear panel
L
M
NN
Rear panel
(Bottom)
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AX-M9000
1-5
1.
2.
Prior to performing the following procedure, remove
the metal cover and front panel assembly.
Remove the ten screws O attaching the control
switch board assembly 1 & 2 on the back side of the
front panel assembly (left & right sides).
Remove the four screws P attaching the metal base
on the backside of the sub-panel assembly (center).
Remove the four screws Q on the backside of the
metal base. Then the display board assembly can be
removed.
1.
2.
3.
<Removing the front panel section>
Removing the control switch board
assembly 1 & 2 and display board
assembly (See Fig.10 to 11)
Prior to performing the following procedure, remove
the metal cover and front panel assembly.
Remove the four screws R attaching the system
control board assembly.
Disconnect the connectors CN611, CN612, CN613,
CN614, CN615 and CN616.
Removing the system control board
assembly (See Fig. 12)
Fig.12
Fig.10
PO
O
Q
R
R
CN611
CN614
CN613 CN616 CN612 CN615
Front panel (right)
Control switch board (1)
Front panel (left)
Control switch board (2)
Display board
System control board assembly
Fig.11
Sub-panel
Metal base
Metal base
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AX-M9000
1-6
1.
2.
3.
4.
5.
6.
7.
8.
Prior to performing the following procedure, remove
the metal cover, system control assembly and rear
cover.
Remove the six through bolts S attaching the heat
sink and the heat sink cover.
Remove the eleven screws T attaching the power
AMP sub-board assembly.
Disconnect the harness, which is extending from
power transformer, from the connectors TB401,
TB402, TB403 and TB404.
Disconnect the harness, which is extending from the
power transformer for pre-AMP, from the connectors
CN401 and CN402.
Disconnect the harness, which is extending from the
fan, from the connector CN453.
Disconnect the harness, which is extending from the
signal processing board, from the connector CN301.
After removing each screw U attaching the power
AMP sub-board assembly (1) & (2), take off the
power AMP sub-board assembly from the heat sink.
Remove the seven screws V attaching transistor
Q335~Q340.
Removing the power AMP board
assembly / heat sink (See Fig. 13 to 15)
Fig.14
Fig.13
TB401
TB402
CN402
CN401
11
CN301
CN453
TB403
TB404
Power AMP sub-board
assembly (1) (2)
Heat sink cover
Power AMP board
Signal
processing
board
T
U
S
Fig.15
V
Transisitor Q335~Q340.
Power AMP board
Heat sink
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AX-M9000
1-7
Prior to performing the following procedure, remove
the metal cover and the rear panel.
Remove the current mode source selector board
assembly and the rear terminal panel.
Remove the five screws Y attaching the signal
processing board assembly.
Remove the connectors CN251 and CN252.
1.
2.
3.
Prior to performing the following procedure, remove
the metal cover and the rear panel.
Remove the six screws W attaching the RCA pins on
the current mode source selector board assembly.
Then, the current mode source selector board can
be removed.
Remove the four screws X attaching the cannon
connector on the signal processing board.
Then, the rear terminal panel can be removed.
1.
2.
3.
Removing the current mode source
selector board assembly and rear
terminal panel (See Fig. 16)
Removing the signal processing board
assembly (See Fig. 17)
Removing the power switch board
assembly (See Fig. 18)
Prior to performing the following procedure, remove
the metal cover.
Remove the four screws Z attaching the power
switch board assembly.
Remove the cable connecting to the transformer.
1.
2.
Fig.17
Fig.18
Fig.16
W
X
Current mode source selector board assembly
Rear terminal panel
Y
Y
Z
Signal processing board
Power
switch
board
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AX-M9000
1-8
1.
Prior to performing the following procedure, remove
the metal cover.
Remove the two screws A attaching the power
transformer for pre-AMP.
1.
Removing the core transformer
for pre-AMP (See Fig. 19)
Removing the transformer
for power AMP (See Fig. 20)
Prior to performing the following procedure, remove
the metal cover and the front panel assembly.
Remove the four screws B attaching the power
transformer for power AMP.
Fig.20
Fig.19
A
B
Power transformer
for pre-AMP
Power transformer for power AMP
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AX-M9000
1-9
CLAMP
WR104WR103
WR102
13P
12P
8P
CLAMP
CLAMP
CLAMP
Black wire
Purple wire
Red wire
Gray wire
Yellow, Brown wire
CN insertion
Orange, Blue wire
CN insertion
Red, Black wire
CN insertion
Fig 1.
Fig 2.
Arrangement drawings for the clamp binding
In order to secure the performance of the machine, refer to the following arrangement drawings
when the lines are clamped.
White wire 2
Red wire 2
White RED wire
Brown wire
S CLAMP
Red wire 2
Black wire
White wire
Red wire
S CLAMP
S CLAMP
S CLAMP
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AX-M9000
1-10
100Hz More than 70dB
1kHz More than 70dB
10kHz More than 70dB
100Hz More than 70dB
1kHz More than 70dB
10kHz More than 70dB
Adjustment method
2. Adjustments and confirmation
Remarks
Five minutes later
after turning the
power on
Description
Standard
output
Total distortion
factor
Output level
Hum noise
Frequency
characteristics
AC voltage of
speaker terminal
Adjustments of
idling currency
Confirmation of
idling currency
Crosstalk
Adjusting method
1) INPUT LINE1 - Output at the time of THD0.5% at f=1kHz
1) INPUT LINE1 - Distortion factor at the time of
200W (40.0V) at 8 load
1) Output level at the time when inputting 1kHz 200mV
to LINE 1
1) Line 1
1) No signal, no load, Vol. 0.0
1) Prior to turning the power on, turn the R398
counterclockwise fully
2) After connecting the 3 pin and 4 pin of the CN303 to the
electronic voltmeter, adjust the voltage to 2-3mV.
3) After elapsing five minutes, adjust the voltage to
3.5+/-0.5mV. Since there is backlash, thoroughly adjust it.
4) After elapsing two minutes, make sure that the voltage
falls within 3.5-7mV. In case where the voltage does not
fall within the specified value, readjust it to the values
specified in 3) above.
1) No signal, no load, rated power
Confirm under the room temperature of 20-25
1) INPUT LINE 1 - The output at the
input terminal side shall be +20dBm
as a standard.
The CH to be measured shall be terminated at 10k
Standard value
More than
210W/8 (41.0V)
192mV +/- 10mV
Less than +/- 1mV
20Hz Less than 0.04%
1kHz Less than 0.04%
20kHz Less than 0.06%
Line1
to
Line2
Line1
to
Line5
100Hz
1kHz
10kHz
Vol. 99. 5
Vol. 99. 5
Vol. 69. 5
Vol. 44. 0
Vol. 99. 5
45.6dB 1dB
45.6dB 1dB
33.4dB 1dB ATT ON
31.0dB 1dB
5.8dB 1dB
45.6dB 1dB
Less than 10mV
Less than 0.4mV
1) Line 1
2) Base hum
Input short
Volume min.
1. List of measuring devices
Measuring devices : Electronic voltmeter
Oscilloscope
Low-frequency transmitter (50Hz-20 kHz of transmitting frequency and output of 0
dBs at the 600 terminal)
Distortion factor tester (with a built-in band path filter)
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AX-M9000
1-11
BU2114F-X (IC542,543,544) : LED controller
SIN
CK
LATCH
SOUT
EN
RST
GND
GND
GND
VDD
01
02
03
04
05
06
07
08
1. Pin layout
2. Pin function
Symbol
SIN
CK
LATCH
SOUT
EN
RST
GND
GND
GND
08
07
06
05
04
03
02
01
VDD
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
I/O
I
I
I
O
I
I
-
-
-
O
O
O
O
O
O
O
O
-
Function
Serial data input terminal
Shift lock of the shift register
When this terminal is set at "L", the latch output will be secured,
In addition, when the output of the shift register is changed during
"H", the latch output will be changed simultaneously.
Output of the shift register at the final stage
Enable terminals of 01 to 08
Reset of the shift register and latch
Ground
Ground
Ground
Output of the shift register at the 8th stage
Output of the shift register at the 7th stage
Output of the shift register at the 6th stage
Output of the shift register at the 5th stage
Output of the shift register at the 4th stage
Output of the shift register at the 3rd stage
Output of the shift register at the 2nd stage
Output of the shift register at the 1st stage
Power supply
Description of major ICs
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AX-M9000
1-12
MN101CP10A(IC521) : System controller
1
16 17 32 33
48
4964
~
~
~
~
1.Pin layout
2. Pin function
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Symbol
KY10 (DOWN)
KY11 (LINE)
KY12 (MUTE)
TMP IN1
TMP IN2
VREF+
VDD
OSC2
OSC1
VSS
XI
XO
MMOD
SADATO
SADATI
SACLK
SBDATO
SBDATI
SBCLK
SREQO
RST
VOLCS
VOLCLK
VOLDATO
AT T
MUTE LED
M.WAKE
SREQI
INH
ROT3
ROT2
I/O
I
I
I
I
I
O
I
I
O
I
O
I
O
O
I
I
O
I
O
O
O
O
O
I
I
I
I
I
Pin No.
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
Symbol
ROT1
C
B
A
POWER
ABS
MONPRO
ALLEACH
PRESEN1
PRESEN2
SPKB
SPKA
FANH
GM1
GM2
HPS
LRST
FANL
LDATO
LCLK
LACH
B.CON
RM
KY1 (HPS)
KY2 (EACH)
KY3 (PRO)
KY4 (PRE)
KY5 (SP)
KY6 (PHASE)
VSS
KY7 (POWER)
KY8 (ATT)
KY9 (UP)
I/O
I
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
I
I
I
I
I
I
I
I
I
Pin function
Key input 10
Key input 11
Key input 12
Temperature detect 1
Temperature detect 2
AD reference voltage
terminal 5.0V
2.0 5.0V supply
Clock out
Clock in
0.0V supply
GND
Open
Memory extended mode
SA data out
SA data in
SA clock
SB data out
SB data in
SB clock
Request for the communication
output between the sets
Reset terminal
VOL. CS
VOL. clock
VOL. out
Input ATT
Mute LED
Return form the stop mode
Request for the communication
output between the sets
INM
Rotary input 3
Rotary input 2
Pin function
Rotary input 1
Line decoder C
Line decoder B
Line decoder A
Power SW
Absolute phase SW
MON/ PRO SW
All each (LED)
Presence SW1
Presence SW2
Speaker B
Speaker A
Fan control High
GM volume output 1
GM volume output 2
HPS filter SW
Serial/ Parallel IC reset
Fan control LOW
Serial/ Parallel IC out data
Serial/ Parallel IC clock
Latch
Brightness control
Remote control input
Key input 1
Key input 2
Key input 3
Key input 4
Key input 5
Key input 6
(GND)
Key input 7
Key input 8
Key input 9
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AX-M9000
1-13
NJM2903M-XE(IC454) : Temperature detector
1
2
3
45
6
7
A OUTPUT
A -INPUT
A +INPUT
V
+
B OUTPUT
B -INPUT
B +INPUT
OUTPUT
-INPUT
+INPUT
(TOP VIEW)
Q110 Q109 Q111
D104
D102
Q102
Q107
Q108
Q4 Q3
Q5
Q6 Q2
Q1
Q7
Q8
R1
Q104
Q103
Q105 Q106
Q101
D103
D101
Q112
GND
GND
V
+
8
1. Pin layout
2. Block diagram
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AX-M9000
1-14
NJM5532M-D-W(IC152,153) : Presence circuit amp
V
OUTPUT
V+
+INPUT
INPUT
1
2
3
45
6
7
8V +
B OUT
B - IN
B + IN
A OUT
A - IN
A + IN
V -
1. Pin layout
2. Block diagram
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AX-M9000
1-15
OPA134PA(IC108, 201, 301) : OP Amp.
1
2
3
45
6
7
Offset Trim
- In
+ In
Offset Trim
V +
Output
NC
8-Pin DIP, SO-8
V -
8
+
-
Pin layout
1
2
3
4
5
6
78
9
10
11
12
13
14
1A
1Y
2A
2Y
3A
3Y
GND
Vcc
6A
6Y
5A
5Y
4A
4Y
(TOP VIEW)
TC74HC04AF(IC264) : Data line buffer
AY
L
HL
H
Pin layout
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AX-M9000
1-16
TC74HC238AF-X(IC525) : Line recorder
1
2
3
4
5
6
7
9
10
11
12
13
14
A
B
C
G2A
G2B
G1
GND
Vcc
Y0
Y1
Y2
Y3
Y4
Y5
(TOP VIEW)
8
Y7
15
16
Y6
INPUTS
ENABLE SELECT
OUTPUTS
SELECTED OUTPUT
G1 G2A G2B CBA
L
LL LL
L
LLLL
LLL
LLL
L
LLLL
LL
LL
LL
L
L
X
X
XXXXX
XXXX
XXXX
H
H
H
H
HH
H
HH
HH
H
HH
H
H
H
H
H
H
H
H
LLLLLLLL
LLLLLLLL
LLLLLLLL
LLLLLLL
LLLLLL
LLLLL
LLLL
LLLL LLL
LLL
LL
LL
L
L
LLLLL
LLLLLL
LLLLLLL
NONE
NONE
NONE
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
H
H
H
H
H
H
H
H
Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
A
B
C
1
2
3
SELECT
INOUT
ENABLE
INPUTS
G2A
G2B
G1
4
5
6
15
14
13
12
11
10
9
7
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
DATA
OUTPUTS
1. Pin layout
3. Block diagram
X : Don't Care
2. Truth table
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AX-M9000
1-17
TC74HC27AF-W(IC531) : Noa gate
1
2
3
4
5
6
78
9
10
11
12
13
14
1A
1B
2A
2B
2C
2Y
GND
Vcc
1C
1Y
3C
3B
3A
3Y
(TOP VIEW)
X : Don't Care
2. Truth table
AB CY
HX
XL
H
H
X
XX
XL
L
H
L
L
L
1. Pin layout
1
2
3
4
5
6
78
9
10
11
12
13
14
1A
1B
1Y
2A
2B
2Y
GND
Vcc
4B
4A
4Y
3B
3A
3Y
(TOP VIEW)
X : Don't Care
TC74VHC08F-X(IC281) : Dataline buffer
ABY
LLL
LHL
HLL
HHH
1. Terminal layout 2. Truth table
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AX-M9000
1-18
1
2
3
4
5
6
7
8
9
10 11
12
13
14
OE
Q0
D0
D1
Q1
Q2
D2
Vcc
Q7
(TOP VIEW)
X : Don't Care
Z : High impedance
Qn: The Q output level immediately
before the LE becomes to "L".
TC74HC373HF-X(IC522, IC523, IC524) : Shift register for relay control
OE LE
H
L
L
L
15
16
17
18
19
20
D3
Q3
GND
D7
D6
Q6
Q5
D5
D4
Q4
LE
INPUTS
OUTPUTS
X
L
H
H
X
X
L
H
DQ
Z
Qn
L
H
D
Q
L
LE
OE
D0 D1 D2 D3 D4 D5 D6 D7
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
19
16
15
12
9
6
52
34 781314 17 18
D
Q
L
D
Q
L
D
Q
L
D
Q
L
D
Q
L
D
Q
L
D
Q
L
1. Pin layout
3. Block diagram
2. Truth table
All manuals and user guides at all-guides.com

AX-M9000
1-19
1
2
3
4
5
6
7
89
10
1A
1B
1CLR
1Q
2Q
1Cx
2Rx/Cx
Vcc
1Rx/Cx
(TOP VIEW)
TC74VHC123AF-X(IC532) : Monostable multivibrator
11
12
13
14
15
16
GND
1Cx
1Q
2Q
2CLR
2B
2A
2. Block diagram
3. Timing diagram
-
+
-
+
D
B
B
t
rr
t rr
LH
Vref Vref
C2
F/F
R
R
X /C X
RX/CX
C X
Q N
Q P
V CC
V CC
Q
CK Q
A
A
CLR
CLR
Q
Q
Q
Q
V
IH
V OL
V OH
V OH
VrefH
VrefL
GND
V OL
V IH
V IH
V IL
V IL
V IL
V CC
t w OUT t w OUT t w OUT+
1. Pin layout
All manuals and user guides at all-guides.com

AX-M9000
1-20
UPC1237HA (IC453) : Protection IC
12345678
D1
R4 R9
Q6 Q20
R5 R6
D4
Q4
R10
R11
Q7
R13 R16
R18
R17
D6
R21 R22
Q15
D7
R19
R15
R20
Q12 Q14
R25
R24
R28
Q19
Q18
R27
Q17
R26
Q16
Q13
Q11
Q10
Q9
Q8
R14
Q5
D2
D3
Q1
R3
Q2
2
475
1
6
8
3
1. Pin layout
2. Block diagram
All manuals and user guides at all-guides.com