Printed Wiring Boards - Sony Walkman MZ-R900 Service Manual

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