MZ-NH900
36
36
MZ-NH900
6-13. PRINTED WIRING BOARD – MAIN Section (1/2) –
: Uses unleaded solder.
Q301
D303
D302
Q451
B C E
S890
S891
CN451
(USB)
CN451
(FRONT VIEW)
1
5
6
7
J301
LINE IN
(OPT)
DIN
DGND
DVCC
C302
R302
C371
1
4
RVDD
DTCK
KEY_R
RGND
1
5
C406
R446
R640
R638
R657
R639
C811
C823
C927
C954
C809
C857
R820
R824
R963
R841
C846 C839
C817
R826
C821
R918
R917
R859
R808
C932
R962
R927
R930
C929
R922
C810
C856
R912
R974
C920
R961
R966
R960
R965
R904
R907
IC402
IC603
R447
C713
C715
C714
R712
C712
FB501
R713
R522
R521
R503
R504
R636
R825
R805
R854
R804
R806
R807
R914
C928
R920
R908
R910
C419
R420
R418
R419
C420
R662
R661
R466
R462
R660
R306
R304
R301
R305
R303
R663
R467
R464
R659
R463
R708
C703
C305
C311
C319
C705
C706
C708
C707
C709
C710
C702
R508
C569
R507
C568
C701
C304
C303
C716
C717
C253
C153
R486
R417
R477
R476
C476
R475
R474
R316
R433
R432
R357
R363
C452
R364
C660
R635
R650
C958
C661
FB355
FB353
FB357
L251
L151
C9001
C481
C255
C155
C453
C480
IC471
+
C312
+
C208
+
C318
+
C320
S893
OPEN/CLOSE
DETECT
+
C355
+
C356
C310
+
+
C357
D252
A
K
D152
A
K
J351
i
D352
THP401
Q402
Q616
Q452
Q617
D438
K
A
+
C403
+
C402
+
C922
LF401
D458
K
A
L607
D304
D301
A
K
A
K
K
A
A
K
FB301
Q432
E
B
C
S
D
D
G
D
D
1E
1B
2C
D
D
G
D
D
S
1C
S D D
G D D
Q403
S D D
G D D
1E 1B 2C
1C 2B 2E
Q406
1E
4
3
1
2
1B 2C
1C 2B 2E
Q501
1S 1G 2D
1D 2G 2S
2B
2E
R711
R710
R707
R709
R424
R423
R561
R422
R421
R438
R437
D439
A
K
+
C652
L606
Q609
5
8
4
1
Q603
1
4
8
5
Q614
1E 1B 2C
1C 2B 2E
Q615
S
D
D
G
D
D
+
C923
C909
+
Q613
G D S
3
1
4
5
D611
K
A
D904
A
K
D801
Q801
A
K
R642
R641
R801
R865
R837
C827
C835
C902
C892
C853
C828
R857
R856
R894
R833
C926
R895
R866
R897
C960
C901
C434
R923
R442
R939
R443
C961
C959
R444
C903
R903
R906
R931
R924
R967
R950
R940
R968
R938
R937
R969
L805
L903
L904
L702
L501
L701
C915
+
C918
C931
C933
C812
C864
FB807
L806
C808
C885
C887
FB803
FB802
FB809
C935
C936
C942
C937
C941
C919
C906
Q904
S
D
D
G
D
D
C916 +
Q905
1E
1B
2C
1C
2B
2E
D902
K
A
IC502
1
16
48
33
17
32
64
49
C424
+
C423
+
D440
A
K
Q433
B
C
E
C562
C561
4
3
1
1
3
5
4
2
IC903
CN501
1
26
OPTICAL
PICK-UP
BLOCK
(ABX-U)
C908
45
31
1
15
60
46
16
30
D906
K
A
S
G
D
Q802
G D S
2
1
3
4
IC804
5
8
4
1
C939
+
C940
+
C948
+
Q906
1E 1B 2C
1C 2B 2E
R936
R935
R929
R926
R934
R933
R836
R957
R843
R855
R913
R876
R842
R879
R878
R880
R813
R809
R863
R839
R817
R821
R818
R822
R815
R819
FB810
R864
R834
R835
C814
C813
C847
C802
C801
C861
R925
Q803
B C E
C816
+
C884
+
C845
+
IC902
3
1
4
3
4
2
1
5
IC881
3
1
4
5
D881
A
K
D441
K
A
C886
R885
C427
C895
R873
IC882
Q883
B
C
E
X802
C836
+
L803
R441
R706
MAIN BOARD
(COMPONENT SIDE)
1-861-363-
(11)
11
S890
(PROTECT DETECT)
S891
Hi-MD
PROTECT DETECT
A
B
C
D
E
F
G
H
I
J
1
2
3
4
5
6
7
8
9
10
11
•
Semiconductor
Location
Ref. No. Location
D152
G-9
D252
G-9
D301
D-8
D302
E-8
D303
E-8
D304
D-8
D352
G-9
D438
H-8
D439
I-7
D440
D-7
D441
E-1
D458
F-8
D611
I-5
D801
I-4
D881
F-1
D902
G-5
D904
H-4
D906
H-4
IC402
G-5
IC471
I-9
IC502
D-4
IC603
I-5
IC701
E-6
IC804
I-3
IC881
F-1
IC882
E-1
IC891
I-3
IC901
G-4
IC902
F-2
IC903
F-4
Q301
E-8
Q402
H-8
Q403
D-6
Q406
D-6
Q432
E-7
Q433
D-6
Q451
E-7
Q452
F-7
Q501
E-5
Q603
I-6
Q609
H-6
Q613
I-5
Q614
H-5
Q615
I-5
Q616
F-8
Q617
F-8
Q801
I-4
Q802
I-4
Q803
H-3
Q883
E-1
Q904
F-5
Q905
F-5
Q906
F-3
Summary of Contents for Walkman MZ-MH900
Page 22: ...22 MZ NH900 MEMO ...