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MZ-N505
3939
6-8. SCHEMATIC DIAGRAM – MAIN Board (2/4) – • See page 42 for Waveform. • See page 43 for IC Block Diagrams.
(Page 38)
(Page 40)
R905
C922
C906
C921
C908
C905R903
R902
R941
D903
L904
C903
L902
R909 R910
D901
C914
R920
R911
C512
C919
C920
D902
L905
C561
R922
C521
C522
C551
C918
R914
R906
R917
R936
C926
C910
C907
R924
R923
R925
Q903
Q904
R921
R916
R907
R908
C928
C913C912
C909
C562
C565
C563
C566
C567
C564
R551
R552
R553
Q902
Q901
R560
R561
R562
R927
C924
D904
R915
C911
R947
R918
C917
C915
L906
CN502
L901
R948
C902C901
R946
L551
L552
L553L554
R928
R919
C916
C927
C557 C558 C559
C904
AP913
IC902
AP912
2.2k
1000p
0.01
0.1
0.1
0.12.2k
470k
22k
MA729
100
6.3V
10k 10k
MA2YD15
0.1
10k
0.5%
470
0.1
10 6.3V
10 6.3V
MA2YD15
0.1
22k
0.1
0.1
0.1
2.2
100
0
4.7k
0.5%
22k
0.5%
10
6.3V
1000p
2.2
220k
220k
220k
2SD2216J-R
2SA1745
470k
220k
1M
100k
0.1
4700p1000p
1000p
0.022
0.01
0.022
0.01
0.01
0.022
10k
10k
10k
2SD2216J-R
2SD2216J-R
2.2k
2.2k
2.2k
1M
1000p
MA111-TX
2.2k
0.5%
10
6.3V
1k
0.5%
10k
0.5%
0.1
0.1
10P
100k
0.5%
10
6.3V
10
6.3V
10k
0.5%
0
0
00
100k
47k
0.5%
1
0.1
0.047 0.047 0.047
22
6.3V
(VLO)
XC61CN0802NR
(VCO)
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
V
L
O
N
FCS- FCS+
T
R
K
-
T
R
K
+
C1
C2
C3
C
1
C
2
C
3
C
4
C
5
C
6
D1
D2
D3
TF1
TR1
FR1
FF1
C4
C5
C6
D1
D2
D3
D5
D6
D7
D5
D6
D7
D4
D8
D4
D8
XRST
SCW
SCV
SCU
SP
SMU
SMV
SMW
XMD
CMW
CMV
CMU
CP
CCU
C
C
V
C
C
W
R
E
C
K
H
A
L
F
W
D
E
T
CSEL
FF
SL
ZZ1ZZ2ZZ3
VCP VLP
PG
ND
2
NC
VD
VC2
XRST
CRST
RSTREF
VREF
VB
GND
CLKSEL
VAIFON
FFCLR
SLEEP
CLK
VL
O
N
XW
K1
XW
K2
XW
K4
X
W
K3
V
STB
VRM
C
GN
D
V
L
V
LO
V
L
L2
P
GND2
UI2
PWM2
CPUO2
CPVO2
CPWO2
OE
GND1
VC
VG
CPWO1
CPVO1
CPUO1
PWM1
UI1
VI1
W
I1
PGN
D
W
1
W
O
1
V
M
VW
1
VO
1
P
G
N
D
U
V1
U
O
1
V
M
U
1
V
M
R
1
R
O
1
P
G
N
D1
FO
1
VM
F1
(2/4)
G
N
D
NC
V
D
D
O
U
T
V
U
N
W
V
U
N
W
1
10
B+ SWITCH
Q903,904
Q901,902
SWITCHING
VOLTAGE
DETECTOR
10µH
100µH
100µH
10µH
22µH
(SLED)
M602
M603
OVER WRITE
HEAD UP/DOWN
(SPINDLE)
M601
SLEDN
SLEDU
SLEDV
SLEDW
HD DRV-
HD DRV+
CLVW
CLVV
CLVU
CLVN
W
M
F2
FO
2
PG
N
D2
R
O
2
VM
R2
VM
U
2
U
O
2
P
G
N
D
U
V
2
VO
2
V
M
VW
2
W
O
2
PG
N
D
W
2
W
I2
VI2
FI1
RI1
COM1
CPUI1
CPVI1
CPWI1
GND2
NC
CPWI2
CPVI2
CPUI2
COM2
RI2
FI2
IC551
SC111258FCR2
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
NC
L2
PGND2
LG
VG
INM2
RF2
DTC2
DTC1
INM1
RF1
L1
VGFB
VDRF
IC901
XPC18A32FCR2
POWER CONTROL
P
GND
1
NC
L1
V
CO
U
T
VC
V
CO
VC
G
N
D
VIFFB
V
D
FB
VA
FB
VA
VIF
P
GND
1