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CAUTION: For continued safety, replace safety critical compo-
nents only with manufacturer's recommended parts (refer to
parts list).
indicates safety critical components. For continued
protection against risk of fire, replace only with same type and
1
rating fuse(s). To reduce the risk of electric shock, leakage-cur-
rent or resistance measurements shall be carried out (exposed
parts are acceptably insulated from the supply circuit) before the
appliance is returned to the customer.
The DC voltage is an actual reading
IC2
: ICP-N10
measured with a high impedance
IC4
: SM5843AP
type voltmeter. The measurement
IC5
: KAN05
IC7-14
: TC74AC74F
value may vary depending on the
IC15,16,31-34
: NJM4580E
measuring instruments used or on
IC24
: TC74VHCU04F
the product. Refer to the voltage dur-
2
ing RECORDABLE MD PLAY unless
Q31
: 2SK246(Y,GR)
otherwise specified; The value shown
D32
: UDZ5.1B
in ( ) is the voltage measured at the
D36,37
: 1SS133 or HSS104
moment of STOP. The voltage fol-
lowed by (REC) refers to the value
during MD RECORDING.
+B
-B
LC89170M
3
WH1
+5
1
+5V
X32-A/5
512fs
2
-CN10
EMPH
3
2/3
LRCK
4
DATA
5
C
BCK
6
RESET
7
256fs
8
GND
9
TC7S08FU
GND
10
4
X25-
R100
WH1
10K
2/3
CXA2523AR
D
LC8904Q
X25-
CN7
R110
1K
2/3
5
E
X25-
-CN11
KAN03
2/3
F
X25-
-CN4
2/3
6
G
X25-
TC74HC373AF
-CN1
TC74VHC244F
2/3
H
7
BA
BB
PROCESSOR UNIT
(X32-3470-00): DM-9090 ONLY
IC7,9,11,13
D-LATCH
IC
2.2V
+
+
2.2V
IC7
+5V
BUFFER
4.9V
IC24
(3/6)
14
13
12
IC24 (6/6)
SIGNAL LINE
1
GND LINE
2
+B LINE
-B LINE
IC24(5/6)
3
4
5.2V
+5V
C117 10P
L9 4.7uH
R107 220
R285
VDD
3.9
5.0V
1/4W
IC4
DIGITAL
1.5V
1
FILTER
D1
IC
28
2.5V
2
LRCI
BCK1
27
TMOD
3
R103
(DG)
CKSLN
26
1.3V
470
4
BCKO
40
INF IN
25
R104 470
WCKO
41
(
43
)
1.5V
R101 470
5
24
DOL
IW1N
C103
R102 470
6
23
DOR
XT1
43
(
41
)
1000P
2.5V
1.5V
(
40
)
7
22
XT0
VDD
VDD
2.4V
8
21
C280
NC
+
VSS
5.0V
(DITHN)
9
20
CYNCN
CKO
0.01
(MUTEL)
10
19
IW2N OW2ON
(MUTER)
18
11
FSEL2
MDT
17
(0W1N)
12
FSEL1
MCK
+
16
0V
(0W2N)
13
DEMP
MLEN
(DEMPL)
4.9V
(SYNC)
15
0V
14
MUTE
RSTN
(DEMPR)
R108 1K
R135
470
R194 3.9K
IC8,10,12,14
D-LATCH
IC
2.2V
2.2V
+
+
(BOTTOM VIEW)
(BOTTOM VIEW)
IC14
+5V
+5V
BC
BD
2.5V
2.2V
2.2V
+
2.2V
2.2V
IC11
IC9
+5V
+5V
X1
22.5792MHz
IC24
(4/6)
R260 1M
5
6
IC24
IC24
7
(1/6)
(2/6)
8
11
9
10
+
C257
+
2200P
C135
10P
D36
D37
C258
C112
470P
12
0.01
44
VSS
VSS
R111 470
13
43
LD0
DOR
R113 470
14
42
LD1
DOL
R115 470
15
41
LD2
WCK
IC5
40
16
R117 470
BCK
LD3
24BIT D/A
39
17
VDD
VDD
VDD
VDD
CONVERTER IC
R112 470
18
38
RD3
(BOTTOM VIEW)
RST
R114 470
19
37
RD2
W1
R116 470
20
36
RD1
W0
R118 470
21
35
RD0
CLK21
22
34
VSS
CLK20
C114
VDD
10P
R200 3.9K
R122 3.9K
+
+
(BOTTOM VIEW)
IC12
IC10
4.9V
+5V
BE
BF
2.5V
R177
3.3K
8
6
4.9V
2.2V
4.9V
-
7
5
+
IC31
(1/2)
+
R179
2.2V
3.3K
8
6
4.9V
4.9V
-
7
5
+
IC33
(1/2)
R181
IC13
4.9V
3.3K
2
4.9V
-
1
+5V
3
+
IC33
4
+5V
(2/2)
+5V
R183 33K
2
4.9V
1
-
3
+
4
IC31
(2/2)
Lch
R155
3.9K
2.0V
2.0V
R129 18K
C155
330P
C129 120P
R157
3.9K
2.0V
2
-
3
+
4
+
+
2.0V
4
C108
5
R158
+
3.9K
470P
6
-
2.0V
2.0V
C130 120P
R138
R130 18K
C106 470P
2.0V
2.0V
R156
3.9K
Rch
R184
3.3K
2
-
4.9V
1
3
+
IC34
4
(1/2)
R182
3.3K
2
4.9V
-
1
3
+
IC32
4
(1/2)
(BOTTOM VIEW)
R180
3.3K
IC8
8
6
-
7
5
+
+5V
IC32
(2/2)
4.9V
+5V
R178
3.3K
C284
8
6
4.9V
-
7
+5V
5
+
IC34(2/2)
BG
BH
10.9V
+11V
IC15,16,31-34
OPE AMP
R185
510
4.9V
+11V
R187
510
4.9V
Q31
+5V POWER
R189
STABILIZATION
4.9V
3.3K
C173
0.01
-B
Q31
R191
4.9V
510
R251
1K
4.9V
+
-B
R127 18K
C127 120P
R136
330
6
0.4V
-
7
5
+
IC15
8
(1/2)
+11V
WH2
R137
1
LO+
330
0.4V
1
2
LO-
IC15
10.9V
(2/2)
-B
+B
3
+B
-11.6V
C133
0.01
C134
0.01
4
GND
5
GND
L2
IC2
2.2uH
C167
OUT
IN
6
-B
0.01
-B
IC
IC16
PROTECTOR
(2/2)
0.4V
7
RO-
7
8
RO+
330
+11V
C147
100P
IC16
(1/2)
3
8
+
0.4V
2
1
-
C174
100P
C128 120P
R139
330
R128 18K
P1
P2
4.9V
R192
4.9V
510
-B
4.9V
R190
4.9V
510
-B
+11V
R188
510
+11V
4.9V
R186
4.9V
510
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