MZ-NH1
21
21
MZ-NH1
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM – MD SERVO Section –
IY
VREF
OPTICAL
PICK-UP
BLOCK
(ABX-U)
HR601
OVER
WRITE
HEAD
RF AMP, FOCUS/TRACKING ERROR AMP
IC501
M703
OVER WRITE
HEAD
UP/DOWN
IX
JX
JY
A
B
C
D
S0
S1
L2
TRK+
FCS+
FCS–
FCS+
FCS–
TRK–
TRK+
TRK–
101
106
107
108
109
114
153
110
225
113
252
209
210
251
142
169
170
164
165
166
160
232
168
167
172
216
157
156
154
155
162
163
47 46 45
238
IIN
F
OVER WRITE
HEAD DRIVE
Q601, 602
M
M
OVER WRITE HEAD DRIVE
IC601 (1/2)
123
180
CLK
SLD MON U
SLD MON V
CLV MON U
CLV MON V
CLV MON W
SLD MON W
SLD MON V
SLD MON U
FCS–
FCS+
TRK–
TRK+
FOCUS/TRACKING
COIL DRIVE,
SPINDLE/SLED
MOTOR DRIVE
IC701
M701
(SPINDLE)
PLSE_XDC
CONT
254
272
52 53 54
CLV MON W
CLV MON V
CLV MON U
159
289
290
175
U
W
V
M702
(SLED)
U
W
V
171
SLD MON W
RF BUFFER
Q504
•
SIGNAL PATH
: PLAYBACK
: REC
L2 B+
L1
L1 B+
VCC
REG3 B+
PVCC
REG2 B+
MVCC
MDVCC