Printed Wiring Board - Main Board - Sony MZ-R70 Service Manual

MZ-R70
Common note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
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.
• : internal component.
f
• C : panel designation.
Note:
Note:
Les composants identifiés par
The components identi-
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 piéce portant le numéro
number specified. spécifié.
• A : B+ Line.
• Power voltage is dc 3V 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 : REC
( ) : PB
: 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.
J
: CD
Common note on Printed Wiring Boards:
• Y : parts extracted from the conductor side.
•
f : internal component.
•
: Pattern from the side which enables seeing.
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B) pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A) parts face are indicated.
• Main board is four-layer printed board.
However, the patterns of layers 2 and 3 have not been in-
cluded in this diagrams.
* IC502, IC801 is not replaceable
• Lead Layouts
surface
Lead layout of conventional IC CSP (chip size package)
6-4. PRINTED WIRING BOARD — MAIN BOARD —
1 2 3
MAIN BOARD (SIDE A)
A
S801
(OPEN/CLOSE)
B
C
D
IC504 IC505
FB601
TP904
8 5 8 5
1 4 1 4
C629
R524
E
C534
C536
C535
R522
F
OPTICAL
PICK-UP
G
TP816
AP910
AP909
H
S803
T.MARK C605
L606
R637
TP601
D602
I
C613
C615
04
– 31 –
4 5 6
AP530
X501
L604
20 15
C514
25
10
C621
30
IC601
5 L601
35
1
40 45 48
C631
R520
CN501 1
R638
TP5105
10
TP5118
20
AP5119
R809
R813
C810
TP914
R807
AP808
R838
TP9001 TP915
R937
TP801
R929
C922
TP828
R942
C612
R611
D601
R612
R639
R613
1 8
Q603
4 5
D600
7 8 9
S802
(OPEN)
TP343
TP344
RB603 RB602
TP315
TP333
TP331 TP334 TP341
R307
R321 R302
TP332
C220
R204
C222
AP5101 TP5112
R104
L501
AP5102 C308
C122
R202
R102
TP348
C307
R301
TP5120
TP347 R322
D905 C333
L902
TP903
C106
R936 R923
R921
C206
C910
C929
C918
R924 R913
L905
C933
C932
R930
C935
C902
R907
L904
TP316
TP823
Q905
L603
– 32 –
10 11
TP335 TP342
J301
(1/2)
LINE IN
(OPTICAL)
TP345
TP346
TP336
TP337
TP338
C203
D101 D201
C201
R209
TP317
TP905
TP906
TP311
J304
TP312
(1/2)
TP313
i 1
TP314
(LINE OUT)
1-677-124- 11