Table of Contents
Advertisement
A
B
PRINTED CIRCUIT BOARD (Foil side)
1
MD MAIN PWB-A (TOP VIEW)
2
L1501
R1519
R1532
C1704
C1501
R1708
R1712
Q1702
R1711
C1703
C1707
28
15
L1700
25
20
R1702
IC1701
3
C1702
L1701
R1403
1
14
5
10
R1413
C1715
R1402
R1705
R1709
R1710
R1706
4
C1616
5
6
C
Note : y ~ o
Connect an oscilloscope to the test points (y ~ o) through a
filter as shown below.
100K
test points
270P
R1808
R1805
C1804
7
5
1
Q1805
L1300
R1514
IC1300
C1802
8
10
14
Q1500
Q1800
R1304
Q1400
C1408
R1801
C1805
R1406
3
1
R1400
Q1804
4
5
IC1801
R1415
R1416
C1411
R1422
C1409
R1420
R1419
1
8
R1421
R1425
IC1402
R1423
R1426
4
5
R1428
C1410
R1427
R1209
R1208
L1201
C1204
C1210
R1212
1
C1207
C1206
R1219
5
R1200
10
R1202
R1201
R1223
15
R1102
R1203
R1210
R1207
20
R1101
C1202
25
28
L1200
R1100
C1203
FLEXIBLE
MD PICKUP UNIT
PWB
D
E
q
@4
to
: TEST POINT WAVEFORMS (See page 66 ~ 67)
oscilloscope
MD MAIN PWB-A (BOTTOM VIEW)
BL
CW1903
D1300
CN1300
Q1300
2
Q1301
Q1303
TP1301
C1300
G
D
S
G
D
S
G
CHASSIS GND
TP1302
TP1303
TP1800
C1800
TP1204
R1809
14
13
EFMMON
1
(TP1201)
11
C1120
10
5
CHASSIS GND
GND
TP1125
(TP1125)
C1115
TP1113
4
TP1132
TP1134
R1109 R1111
TP1133
TP1131
TP1126
R1110
R1108
C1112
TP1127
36
37
35
30
EOUT
(TP1129)
40
IC1101
20
45
15
48
5
10
FOUT
C1105
(TP1130)
1
12
C1104
C1101
R1103
TP1124
TP1107
TP1115
TP1102
TP1111
TP1110
TP1106
TP1137
1 2
RE
BL
M902
MD SLED MOTOR
68
F
1
BL
MAGNET HEAD(32)
2
1
RECORD
1
TP1511
TP1411
TP1519
CN1501
C1803
TP1518
5
10
15
20
1
TP1515
1
TP1300
C1505
C1508
TP1516
TP1606
TP1509
TP1517
TP1512
TP1500
C1608
R1522
TP1502
TP1514
R1535
TP1510
D
TP1504
D1301
TP1508
S
TP1501
TP1503
TP1505
Q1302
R1707
TP1410
R1404
1
2
3
TP1217
R1410
IC1702
TP1218
30
1
TP1701
R1401
TP1215
31
25
100
20
15
10
5
TP1415
C1701
35
TP1404
95
TP1405
IC1401
R1414
40
TP1278
90
R1105
TP1414
45
TP1407
TP1408
85
TP1409
60
TP1413
55
65
70
75
50
81
TP1412
51
80
R1429
C1205
TP1209
TP1207
TP1201
TP1216
100
TP1212
TP1211
76
1
95
90
85
80
75
R1211
TP1135
5
70
R1217
C1117
10
65
C1619
C1209
IC1201
15
TP1128
15
60
C1208
TP1213
TP1406
20
55
TP1200
TP1129
21
R1222
25
30
35
40
45
51
25
TP1130
TP1203
24
26
50
30
TP1900
TP1208
TP1117
TP1214
TP1118
TP1210
TP1205
C1602
22
C1106
TP1206
TP1202
10
1
TP1112
C1603
13
6
5
TP1136
TP1119
TP1101
TP1108
R1606
TP1109
TP1100
28
IC1202
TP1103
TP1122
C1103
C1604
TP1104
TP1121
TP1116
TP1105
11
15
16
20
TP1123
CW1901
SW1953
LEAD IN
R1904
SW1954
1
2
3
PLAY
4
R1903
5
SW1955
RECORD
R1902
SW1956
SW1952
LOADING
DISC MEDIA
R1901
WRITE PRO
M901
MD MECHANISM SWITCH PWB-B
MD SPINDLE MOTOR
G
H
GX-900
28
CNW2002
28
TP1513
TP1521
TP1506
TP1522
25
R1513
TP1524
28
TP1525
C1502
TP1507
R1512
R1516
TP1523
TP1700
TP1703
TP1705
C1709
C1713
TP1702
C1700
C1712
C1710
C1716
18
19
C1711
21
TP1704
20
16
TP1706
2
TP1601
CN1602
1
15
TP1600
6
7
TP1901
9
TP1403
5
C1401
TP1402
17
TP1401
1
C1400
23
14
TP1400
22
TP1603
TP1602
TP1607
12
C1610
8
2
29
1
CN1603
3
R1616
7
2
C1613
TP1801
TP1605
CN1604
2
1
1
TP1604
8
1 2
1 2
RE
BL
RE
BL
M903
MD LOADING MOTOR
69
Hide quick links:
Advertisement
Table of Contents
