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MZ-R900
Note on Schematic Diagram:
• All capacitors are in F unless otherwise noted. pF:
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in
and
1
/
W or less unless otherwise
4
specified.
•
%
: indicates tolerance.
• C : panel designation.
Note:
Note:
The components identi-
Les composants identifiés par
fied by mark 0 or dotted
une marque 0 sont critiques
line with mark 0 are criti-
pour la sécurité.
cal for safety.
Ne les remplacer que par une
Replace only with part
pièce por tant le numéro
number specified.
spécifié.
• A : B+ Line.
• Total current is measured with MD installed.
• Power voltage is dc 3 V and fed with regulated dc power
supply from external power voltage jack.
• Voltages and waveforms are dc with respect to ground in
playback mode.
no mark : PLAYBACK
(
) : REC
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
E
: PLAYBACK
k : REC (ANALOG IN)
l : REC (DIGITAL IN)
* Replacement of IC801 used in this set requires a
special tool.
• The voltage and waveform of CSP (chip size package)
cannot be measured, because its lead layout is different
form that of conventional IC.
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
Parts on the pattern face side seen from
(Conductor Side)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component Side) the parts face are indicated.
• MAIN board is four-layer printed board.
However, the patterns of layers 2 and 3 have not been
included in this diagrams.
* Replacement of IC801 used in this set requires a
special tool.
• Lead Layouts
surface
Lead layout of conventional IC
CSP (chip size package)
6-4.
PRINTED WIRING BOARDS
• Semiconductor
1
2
3
4
Location
Ref. No.
Location
D301
H-13
D302
H-13
A
D303
F-13
D601
I-20
D602
I-15
D603
F-9
D605
I-16
D606
I-19
D607
H-21
B
D608
H-18
D801
D-18
D901
H-14
D902
F-15
D903
G-14
D904
G-14
MAIN BOARD
(COMPONENT SIDE)
IC301
E-15
C
IC302
G-13
S802
S801
IC303
E-13
SYNCHRO REC
HOLD
ON
T
OFF
HOLD
T
OFF
IC501
G-18
IC551
E-17
IC601
H-21
IC801
E-20
BATTERY IN
IC804
D-19
IC805
E-6
R840
D
C823
IC901
G-15
R838
R830
Q302
D-14
R805
Q501
F-17
Q601
I-20
C818
C803
Q602
G-9
R806
R833
Q603
I-20
EXECEPT
R835
US, Canadian
Q604
H-19
E
C804
C812
C833
Q605
H-18
R810
Q801
I-14
C835
R804
Q803
H-14
(CHASSIS)
C805
R801
F
OPTICAL
PICK-UP BLOCK
(LCX-4R)
G
H
R607
C621
R613
R606
R610
C619
C613
I
(CHASSIS)
J
05
30
30
5
6
7
8
9
10
S803
PROTECT
DETECT
S805
OPEN
S804
J301(1/2)
DETECT
LINE IN
(OPT)
RB551
RB552
RB553
IC805
+
C113
1
5
C559
3
4
C832
C522 C560
C558
CN501
+
C554
1
+
C553
R907
+
C556
+
C903
+
C555
D603
S806
K
A
(OPEN/CLOSE DETECT)
Q602
L905
1
8
C309 +
20
L902
R308
C313 +
+
C312
4
5
L601
L551
L903
L901
L554
L553
RB801
T601
1-679-610-
(CHASSIS)
30
30
11
12
13
14
15
16
MAIN BOARD
(CONDUCTOR SIDE)
MOTOR FLEXIBLE
R317
C211
J301(2/2)
LINE IN
(OPT)
C118
C112
15
C117
4
1
R118
(CHASSIS)
5
16
C212
R305
IC303
42
28
22
R304
8
13
43
J303
9
12
1
21
MIC
IC301
(PLUG IN POWER)
R102
R101
7
15
C217
8
14
C306
C218
C302
56
C304
+
C301
R319
1
L302
L301
AP914
(VC)
+
C344
C904
R920
AP915
D303
AP912
(VL)
(GND)
K
A
TP
R310
14
1
C926
(–)
D903
4
1
15
56
C906
R941
5
16
L501
R909
8
13
TP
R815
C908
C921
(+)
IC901
9
12
J302
C905
i
/ LINE OUT
R902
C917
FB301
K
A
28
43
FB302
D904
FB303
29
42
D901
+
C337
C919
FB304
R949
A
K
C
8
5
R912
FB305
+
C920
Q803
R901
D301
C901 +
FB306
B
E
R946
K
1
4
C338
A
R948
C329
C335
D302
R936
C106
R204
R203
R104
R205
R105
Q801
TH601
C836
R846
D605
C601
A
K
1
5
10
15
18
R622
A
K
CN801
D602
C837
11
(11)
DRY BATTERY
(IEC DESIGNATION R6)
J601
SWITCH
&
DC IN 3V
LCD MODULE UNIT
–
+
(BATTERY CASE)
30
30
17
18
19
20
21
22
RECHARGEBLE
BATTERY
(NICKEL-METAL)
NH-14WM
1.2V 1400mAh
BOARD
1-679-392-
11
MD
MECHANISM
C811
1
8
L802
IC804
FB804
+
C815
+
C821
4
5
FB803
FB801
FB802
X801
CN502
118
106
107
108
109
110
111
100
112
105
104
88
92
83
79
77
70
81
60
58
164
145
85
72
93
115
116
117
102
99
101
97
94
87
80
74
67
65
63
62
57
61
10
5
1
147
89
82
86
124
123
122
121
120
114
243
127
128
129
130
131
133
135
137
68
55
54
56
R841
157
159
90
75
78
64
69 71
119
98
103
143
91
84
76
73
66
59
49
53
+
C830
170
174
125
44
50
47
29
172
224
126
154
35
36
45
28
L801
180
161
132
153
31
30
51
182
149
134
151
113
24
42
181
166
136
142
25
20
26
165
168
138
139
28
16
40
IC551
140
146
141
23
17
38
C561
*
152
148
163
IC801
21
15
34
185
179
183
27
8
22
R844
191
189
193
96
95
18
15
C827
207
206
205
19
4
9
232
158
156
29
2
7
14
C521
144
160
169
6
1
3
C502
C508
150
167
171
48
10
5
R501
1
44
178
175
231
241
12
11
+
C529
187
197
195
37
14
13
R507
199
173
228
176
216
184
215
196
221
194
212
52
238
240
234
32
177
162
226
220
188
217
223
186
192
198
214
219
222
218
230
33
236
237
239
242
C503
155
204
203
201
209
211
210
208
225
202
200
213
190
227
229
233
46
43
235
41
39
IC501
R312
R822
C816
C505
R821
C526
C519
C506
C828
C507
C829
22
23
C530
R517
R505
C612 +
+
C611
14
1
5
4
4
1
15
56
Q605
8
1
D608
Q604
IC601
K
A
5
4
Q603
C615
4
1
8
1
28
43
R601
C616
29
42
S
G
R608
C610 +
Q601
1-679-610-
R611
C614
11
D
(11)
SIZE "AA"
HR601
OVER WRITE
1PC. 1.5V
HEAD