McIntosh MA7000, Руководство по обслуживанию

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23 24
DISPLAY/HEADPHONE
750680 SCH
4
[-]
[+]
1
1
1
10R
10R
10L
10L
7
7
3
3
3
FR
O
M
M
AI
N
[-]
[+]
1
10R
10L
7
7
3
3
FR
O
M
R
IG
H
T
PU
SH
BU
TT
O
N
3
3
3
3
3
33
3
3
5R
5R
5R
5R
GND
+5V
+5V
AC DET
R PG
SELECT
IR SENSOR
DECODER
INPUT LED
L PB LOGO
R INTENSITY
L INTENSITY
R METER
R METER
L METER
R GRN
L GRN
+5V
LED
LED
MUTE
OUT 2
LED
LED
MONO
COM
LED
PHONO
DVD
LED
LED
TUNER
REC
LED
LED
SERVER
MONO
+5V
VOL [-]
IR MUTE
FP IR
SCLK
DATA
3
3
3
3
5R
5R
GND
EXT IR
L PG
10
k
R1
47
.5
k
R2
.1u
F
C1
MANUAL RESET
D1
100
R4
10
uF
C2
475k
R5
.1u
F
C4
2.2
1
R7
IR BANK
22
.1
k
R9
47
uF
C5
FRONT PANEL
10
0
R10
10
0k
R12
22
0p
F
C8
1k
R11
MODE LED
DECODER
18
2 R15
18
2
R21 18
2
R23
R COLOR
L COLOR
4.75k
R32
4.75k
R29
4.75k
R30
4.75k
R31
4.75k
R27
L METER
R BLU
+5V
L BLU
STNDBY
LED
OUT 1
LED
LED
CD1
LED
CD2
VOL [+]
TO
M
AI
N
R LCLK
3 1
2
Q1
2
1
3
7
B+
GND
14
U1A
5
4
6
U1B
M
A7
00
0
M
IC
R
O
C
O
N
TR
O
LL
ER
10uF
C7
DS3
DS4
DS5
DS6
DS7
TO
L
M
ET
ER
TO
R
M
ET
ER
TO
R
M
ET
ER
L
IG
H
T
TO
P
R
EA
M
P
R MET [-]
R MET [+]
L MET [+]
ROW0
ROW1
COL0
COL2
POWER GUARD LEDS
R PB
J3:4
L MET [-]
J3:1
J3:3
J3:7
J3:23
J3:20
J3:21
J3:16
J3:19
J3:22
J3:13
J3:15
RESET
COL1
47
uF
C3
10
R6
.1u
F
C6
6
5
4
U4B
.1u
F
C9
200
CCW
1
2
3
R38
200
CCW
1
2
3
R35
18
2 R18
18
2 R22
FRONT PANEL ILLUMINATION
J5B
J4B
J5A
J10:9
J10:5
J10:1
J9:5
J9:1
J2G
J2O
J2C
J2M
J2E
J2Q
J2A
J1G
J1Q
J1E
J1A
J1M
J1C
J1O
J8:4
J8:6
J8:10
J3J
J3L
J3H
J3R
J3N
8x 22k
2 3 4 5 6 7 8 9
1
R3
12.0MHz
1 3
2
Y1
1 3
2
GND
OUT VCC
U3
8x 22k
2 3 4 5 6 7 8 9
1
R8
3
2
1
7
B+
GND
14
U4A
200
CCW
1
2
3
R37
200
CCW
1
2
3
R36
J4A
J9:9
J8:12
V
SS
20
V
D
D
40
P2.0
21
XT1 19
P2.2
23
P2.3
24
P3.7 17
P3.6 16
P2.5
26
P3.4 14
P2.7
28
PSE
29
P3.2 12
P3.1 11
EA
31
RST 9
P0.6
33
P1.6 7
P0.5
34
P1.5 6
P0.3
36
P1.3 4
P0.1
38
P1.1 2
P0.0
39
P1.0 1
P2.1
22
P2.4
25
P3.5 15
XTO 18
P2.6
27
ALE
30
P0.7
32
P0.4
35
P1.4 5
P1.7 8
P3.0 10
P3.3 13
P0.2
37
P1.2 3
U2
DATA
DATA
DATA
F LCLK
L PG
L PG
MONO RLY
MUTE LED
MUTE LED
R PG
R PG
R LCLK
R LCLK
SCLK
SCLK
SCLK
SCLK
VOL DWN
VOL UP
+5V
+5V
+5V
+5V
+5V
+5V
+5V +5V +5V +5V +5V
+5V
+5V
+5V
+5V +5V
+5V
10
9
8
U1C
MUTE LED
8
10
9
U4C
FP IR
FP IR
RLY
J2:16
J2:8
J2:12
J2:14
J2:6
J2:10
J2:4
5R
GND
5L
5L
5L
5L
ROW2
ROW3
COL0
COL2
COL1
J1:16
J1:8
J1:14
J1:6
J1:4
5L
J1:12
J1:10
FR
O
M
L
EF
T
P
U
SH
BU
TT
O
N
5L
ROW2
COL0
5L
MONO LED
OUT1 LED
OUT2 LED
MONO LED
OUT1 LED
OUT2 LED
TO
R
IG
H
T
PU
SH
BU
TT
O
N
5R
5R
5R
5R
5R
5R
5R
5L
5L
5L
5L
5L
TO
L
EF
T
P
U
SH
BU
TT
O
N
5L
5L
11
13
12
U4D
4.75k
R33
4.75k
R28
GND
LEFT
DS2
32
4
R14
RIGHT
DS1
32
4
R13
+5V +5V
+5VM
+5VM
+5VM
3
3
R MET FB
L MET FB
J3E
J3B
L METER ADJ
R METER ADJ
100k
CCW
1
2
3
R16
100k
CCW
1
2
3
R17
QF 5
QG 6
QD 3
QA 15
QB 1
GND
8
QH 7
SQH
9
OE
13
VCC 16
QC 2
QE 4
LCLK
12
RESET
10
SCLK
11
DATA
14
U5
+5V
.1u
F
C10
QF 5
QG 6
QD 3
QA 15
QB 1
GND
8
QH 7
SQH
9
OE
13
VCC 16
QC 2
QE 4
LCLK
12
RESET
10
SCLK
11
DATA
14
U6
+5V
.1u
F
C11
J8:2
7 HDPH RLY
HDPH
RLY
QG
QF
QD
QC
QA
QH
QG
QE
QD
QB
QA
QH
QE
QB
QF
QC
OUT2 LED
OUT1 LED
ILLUM
PHONO LED
REC LED
SERVER LED
CD2 LED
CD1 LED
FRONT
ACC CTRL
T/O DELAY
OUT2 CTRL
OUT1 CTRL
PWR ON
REC OUT RLY
PHONO RLY
REC RLY
SERVER RLY
CD2 RLY
CD1 RLY
REAR
PG/MET MUTE
MONO LED
TUNER LED
DVD LED
MUTE
TUNER RLY
DVD RLY
MET LIGHTS
MET LIGHTS
2
1
3
Vcc
Vout
GND
MT1
HDPH RLY
13
12
11
U1D
10
12 7
15 4
17 2
9
11
13
14
16
18
8
6
5
3
1
GND
U7
HDPH RLY
MONO RLY
MET LIGHTS
J1:18 GND
5L
J2:18
5R
GND
+5V
+5VM
18
2
R24
DS8
+5V
EQ VOL BAL
CONTROL
VOLUME
MOTOR DRIVER
V
C
C
2
V
C
C
10
G
ND
5
IN1
4
OUT1 8
IN2
7
OUT2 3
V
C
C
9
V
C
C
1
G
ND
6
U8
10
R34
+5V
22
0u
F
C12
VOL UP
VOL DWN
MA7000 PreAmp
1
7
VOL [+]
J8:11
VOL [-]
J8:9
7
F LCLK
4.75k
R25
4.75k
R26
3
1
2
Q2
3
1
2
Q3
2
3
1
J7
J6:10
J6:12
J6:6
J6:8
J6:2
J6:4
GND
L HP
R HP
R HP
L HP
GND
TO
L
M
ET
ER
L
IG
H
T
10L
+5V
J9:11
10R
+5V
J10:11
2.21k
R19
2.21k
R20
0V
0V
0V
5V
0V
0V
0V
5V
0V
7
7
7
7
7
7
HEADPHONES