McIntosh MCD550 Service Manual

MCD550
13 14
MAIN 751544 SCH 3 of 3
2
D13
.1UF
C144
4.75k
R198
Idle=4.5mA
AGND(BLK)
AGND(BLK)
LEFT(WHT)
22µF
C117
22µF
C116
47µF
C131
47.5k R168
47µF
C129
47.5k
R167
47.5k
R166
47µF
C127
47.5k
R165
47.5k
R164
.1UF
C139
2
3
1
L
R
J10
.1UF
C138
4
1
3
2
G
S
-
+
J14
LEFT
HEADPHONE
OUTPUT
DRIVER
4.75k
R201
3
1
2
Q23
.1uF
C143
4.75k
R200
3
1
2
Q22
4.75k
R199
3
1
2
Q21
.1uF
C142
3
1
2
Q20
47
R207
47
R206
RIGHT(RED)
47µF
C130
47.5
k
R169
47µF
C128
47µF
C126
4
1
3
2
G
S
-
+
J15
.1UF
C145
D12
10
R196
J16:3
D10
22µF
C124
VARIABLE LEFT-
BALANCED
OUTPUT DRIVER
VARIABLE RIGHT
UNBALANCED
OUTPUT DRIVER
499
R175
499
R174
499
R173
VARIABLE LEFT
UNBALANCED
OUTPUT DRIVER
499
R171
VARIABLE
LEFT
BALANCED
OUTPUT
10
R205
10
R197
10
R204
J16:2
10
R195
10
R202
J16:1
10
R194
D9
VARIABLE RIGHT-
BALANCED
OUTPUT DRIVER
22µF
C125
VARIABLE LEFT+
BALANCED
OUTPUT DRIVER
499
R172
VARIABLE
RIGHT
BALANCED
OUTPUT
499
R170
J16:4
2
1
3
4
K2
10
R203
2
1
3
4
K1
D11
VARIABLE RIGHT+
BALANCED
OUTPUT DRIVER
RIGHT
HEADPHONE
OUTPUT
DRIVER
3
1
2
Q14
3
1
2
Q15
3
1
2
Q18
3
1
2
Q19
3
1
2
Q17
3
1
2
Q16
100
R178
100
R180
100
R181
100
R179
100
R177
100
R176
47µF
C132
47µF
C135
47µF
C137
47µF
C134
47µF
C133
47µF
C136
1K
R182
1K
R187
1K
R184
1K
R185
1K
R186
1K
R183
5
6
7
+
-
U27:2
3
2
1
+
-
8
4
B+
B-
U27:1
3
2
1
+
-
8
4
B+
B-
U28:1
5
6
7
+
-
U28:2
3
2
1
+
-
8
4
B+
B-
U26:1
5
6
7
+
-
U26:2
15VA
-15VA
15VA
-15VA
-14.5VA
14.5VA
-14.5VA
14.5VA
14.5VA
-14.5VA
HMUTE
OMUTE
100k R156
100k
R157
10µF
C118
.1UF
C119
CLOCK DATA LATCH
100µF
C120
100µF
C123
.1UF
C121
.1UF
C122
-14.5VA14.5VA
3.3VD
LEVEL
CONTROL
VARIABLE
LEFT
UNBALANCED
OUTPUT
825
R24
825
R23
1.65k
R14
1.65k
R13
1.65k
R15
825
R17
825
R16
1.65k
R30
5
6
7
+
-
U3:2
3
2
1
+
-
8 4
B+
B-
U3:1
-14.5VA
14.5VA
220µF
C163
220µF
C164
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
47.5k
R25
47.5k
R26
21
22
24
25
26
27
28
29
30
31
32 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1617
18
19
20
23
Z/C REFL
L_REF
L+
L_REF
L-
L_REF
OUTL
DCCAP_R
OUTR
R_REF
R-
R_REF
R+
R_REF
Z/C REFRD_VDD
DATA
CLOCK
LATCH
D_REF
V+
INR
V+
V-
INL
V-
D_CAP
ADR2
ADR1
ADR0
Z/C
DCCAP_L
U25
10µF
C4
100µF
C8
100µF
C6
3
2
1
+
-
8
4
B+
B-
U2:1
5
6
7
+
-
U2:2
39pF
C13
39pF
C10
-14.5VA
14.5VA
HEADPHONE
PCB
10K
R18
10K
R19
VARIABLE
UNBALANCED
OUTPUT
10k
R148
10k
R149
10k
R114
10k
R115
LEFT
RIGHT
10k
R31
10k
R32
.0047µF
C22
.0047µF
C23
.0047µF
C15
.0047µF
C24
.0047µF
C16
.0047µF
C17
1000µF
C18
1000µF
C19
47
R33
47
R34
.068µ F
C20
.068µF
C21
RIGHT
3
2
1
8
4
B+
B-
U29:1
5
6
7
U29:2
-15VA
15VA
1k
R190
1k
R192
3.16k
R189
3.16k
R188
470pF
C141
470pF
C140
100µH
L9
LEFT
4
1
3
2
G
S
-
+
J11
4
1
3
2
G
S
-
+
J12
RIGHT
UNBALANCED
OUTPUT
RIGHT
OUTPUT
UNBALANCED
LEFT
BALANCED
825
R119
825
R118
47µF
C101
47µF
C100
47µF
C99
47µF
C98
47µF
C97
47µF
C96
499
R135
499
R134
499
R133
499
R132
499
R131
499
R130
.1UF
C108
OUTPUT
BALANCED
OUTPUT
.1UF
C111
1.65k
R116
1k
R22
1.65k
R113
1.65k
R117
825
R121
RIGHT
UNBALANCED
OUTPUT DRIVER
1k
R21
825
R120
LEFT
UNBALANCED
OUTPUT DRIVER
1.65k
R112
1k
R20
47.5k
R129
RIGHT-
BALANCED
OUTPUT DRIVER
RIGHT+
BALANCED
OUTPUT DRIVER
3
2
1
+
-
8 4
B+
B-
U23:1
47.5k
R126
47.5k
R125
5
6
7
+
-
U22:2
47.5k
R124
3
2
1
+
-
8 4
B+
B-
U22:1
5
6
7
+
-
U21:2
1k
R111
3
2
1
+
-
8 4
B+
B-
U21:1
47.5k
R128
LEFT-
BALANCED
OUTPUT DRIVER
47.5k
R127
LEFT+
BALANCED
OUTPUT DRIVER
5
6
7
+
-
U23:2
3
1
2
Q8
3
1
2
Q9
3
1
2
Q10
3
1
2
Q11
3
1
2
Q12
3
1
2
Q13
100
R136
100
R137
100
R139
100
R138
100
R140
100
R141
1K
R142
1K
R143
1K
R144
1K
R145
1K
R146
1K
R147
47µF
C103
47µF
C104
47µF
C102
47µF
C105
47µF
C106
47µF
C107
-14.5VA
14.5VA
14.5VA
-14.5VA
-14.5VA
14.5VA
0V
0V
0V
0V
0V
0V
-14.5VA
GP1
GP2
2
3
1
L
R
J9
47.5K
R12
.0047µF
C5
.0047µF
C7
.0047µF
C9
.0047µF
C11
.0047µF
C12
.0047µF
C14
LEFT+
LEFT-
RIGHT+
RIGHT-
OMUTE
FIXED
FIXED
FIXED
FIXED
8
8
8
8

McIntosh MCD550 Specifications

General

SACD playback	Yes
CD changer	-
Device type	Personal CD player
Product color	Black, Silver
Channels quantity	2 channels
Playback disc types	CD
Frequency range	4 - 40000 Hz
Audio formats supported	MP3, WMA
Signal-to-Noise Ratio (SNR)	110 dB
Total Harmonic Distortion (THD)	0.0015 %
Package weight	19200 g
Volume control	Rotary

Weight and Dimensions

Depth	483 mm
Width	445 mm
Height	153 mm
Weight	12700 g