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MXD-D400
6-7.
SCHEMATIC DIAGRAM – BD (MD) Board (1/2) – •
(MD)
CN101
21P
VEE
E
D
C
F
I
VC
A
B
J
VCC
LD-GND
ILCC
MOD
VR
PD
K
FCS+
FCS-
TRK+
TRK-
I+3V
Iop
GND
TEST PIN
TE
(FOR ADJUST)
FE
VC
RF
CN105
7P
M102
(SLED)
M101
(SPINDLE)
CN104
2P
HR901
(OVER WRITE
HEAD)
•
See page 55 for Waveforms.
See page 66 for IC Block Diagrams.
(1/2)
R707
4.7k
TP701
Q704
2SA1576A-T106
-QR
2.3
3.5
2.3
3.5
2.5
-1
-2
Q702
FMW1-T-148
2.2
Q701-704
R702
R701
1k
HF MODULE
C701
1k
SWITCH
0.1
TP616
2.2
E
TP615
0
Q701
Q703
TP614
D
UN5214-TX
UN5214-TX
TP613
C
TP612
F
I
TP611
C105
10
6.3V
TP609
A
B
TP608
TP607
J
TP606
C101
4.7
L601
0uH
L602
0uH
L603
0uH
I
R103
J
TP605
4.7k
0uH
L201
AA1
A
TP604
TP603
AA2
B
TP602
AA3
C
C106
10
TP601
AA4
D
6.3V
E
F
TP204
C107
0.022
R110
470k
TP203
R105
3.3M
R108
2.2k
Q201
UN5113
-TX
LASER ON
R104
SWITCH
470k
C103
0.01
R102
R106
R107
C104
1
100k
680
0.1
Q203
UN5113
R101
-TX
BB8
2.2
BB5
Q202
2SB798
-T1DK
BB1
Q202,203
AUTOMATIC
POWER CONTROL
TP404
DD1
DD2
Q181,182
OVER WRITE
TP403
HEAD DRIVE
TP402
DD3
TP504
TP503
TP502
TP501
DD4
BG1
R501
0
TP401
C501
470p
630V
C704
0.047
R712
100
L701
0uH
R703
R705
IC701
1k
4.7k
TLV2361CDBV
R710
R713
47k
10k
COMPARATOR
C702
R706
4.7
2.2k
R709
2.2k
R704
C703
R708
R711
33k
0.1
4.7k
10k
C114
C109
TP207
C111
2200p
0.047
0.01
C112
0.022
TP215
11
TP163
I
BOTM
TP219
J
ABCD
VC
FE
TP218
A
AUX
TP217
B
ADFG
C
RF AMP,
ADAGC
FOCUS/TRACKING
D
ADIN
ERROR AMP
E
ADFM
IC101
TP216
F
CXA2523AR
SE
C120
PD
CSLED
APC
TE
APCREF
WBLADJ
13
TP214
C116
4.7
TP11
C110
R114
R116
C115
TP212
0.001
4.7k
3.3k
0.1
C117
R112
C113
R113
R115
0.01
100k
0.0068
10k
10k
R111
D101
10k
1SS355TE-17
C108
0.1
R109
4.7k
OVER WRITE
HEAD DRIVE
IC181
MC74ACT08D
TR2
<1.7>
Q181
2SJ518AZTR
<1.7>
<
∗
>
<2.5>
<2.5>
D501
F1J6TP
<
∗
>
<
∗
>
C550
22
D502
20V
F1J6TP
R551
<
∗
>
47k
<
∗
>
Q182
2SK2788VYTR
R552
C504
C502
47k
10
0.1
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : MD PLAY
52
52
<
L202
C299
0uH
0.1
C409
0.1
C490
0.1
12
C406
0.01
BB3
BB4
BB5
BB6
BB9
C119
1
FOCUS/TRACKING
C118
0.0047
COIL DRIVE,
BB7
SPINDLE/SLED
0.068
MOTOR DRIVE
IC401
BB8
BH6519FS-E2
R120
33k
R119
C405
22k
0.1
L203
0uH
R117
100k
C122
0.033
R118
C121
2.2k
0.01
TP143
<
∗
>
<
∗
>
∗
<
>
∗
<
>
<2.5>
<
∗
>
C505
100
6.3V
L550
0uH
L502
L501
0uH
0uH
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
{
} : CD PLAY
Replace only with part number specified.
∗
> : MD REC
: Impossible to measure
A1
A2
A3
A4
A5
A6
A7
L401
0uH
A8
C410
C411
100
4.7
L402
0uH
6.3V
A9
C407
0.1
A10
A11
(MD)
C412
0.01
(Page 53)
A12
A13
A14
A15
A16
A17
A18
A19
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