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OPTICAL PICK UP UNIT
PHOTO DETECTOR
B1
B2
A1
A2
A4
A3
HEAD
AMP
B4
B3
LASER DIODE
Q5201,Q5211
LD DRIVE
LASER DIODE
Q5202,Q5215
LD DRIVE
IC3001
(DV2.1)
VIN5
134
VIN5
TRS-
DRV5
80
VIN6
133
VIN6
TR+
77
DRV2
VIN7
132
VIN7
VIN8
TR-
131
VIN8
DRV3
78
VIN1
138
VIN1
TRS+
DRV4
79
VIN2
137
VIN2
ACT MUT
VIN3
136
VIN3
P7
61
VIN4
135
VIN4
FO+
DRV0
75
FO-
DRV1
76
VREF
127
VREFH
LPC01
124
LPC01
LPC1
123
LPC1
LPC02
126
LPC02
LPC2
125
LPC2
RF IN N
110
RFINN
RF IN P
111
RFINP
TRV-SW+
P10
58
EC
DRV6
81
PHS
DRV8
83
FAST SEAK H
P16
85
HFG
FG
72
SS
P6
65
IC2501
(TRAVERSE MOTOR DRIVE)
RI3
21
FI2
13
LOGIC
CIRCUIT
FI4
29
FI3
20
L
STB
31
FI1
4
RI1
5
IC2502
(SPINDLE MOTOR DRIVE)
PWMIN
11
PHS
PHASE
12
SHIFT
WAVEA
WAVEB
MEMORY AND
MEMORY SCAN
WAVEC
IC2502-19
3.8Vp-p(1msec./div.)
FREQUENCY
MULTIPLIER
HFG
19
STB
1
INDUCTIVE SENSE
START UP BLOCK
Q2501
RF1
SWITCHING
8
RF SIGNAL
MOTOR DRIVE SIGNAL
R03
22
F03
24
PREDRIVER
H-BRIDGE
F01
8
RESET
R01
6
F02
9
F04
25
H+
9
ROTOR
POSTION
H-
DETECTOR
10
KVAL
BLOCK
DIGITAL
PWM
MULTIPLIER
CONVERTER
THERMAL
SHUTDOWN
OUTU
4
OUTV
POWER
5
SECTION
OUTW
6
CURRENT
0.2V
LIMITER
LOW VOLTAGE
DETECTOR
TRACKING ERROR SIGNAL
FOCUS ERROR SIGNAL
TRAVERS MOTOR
PICK-UP UNIT
ACTUATOR
FOCUS
COIL
F+
F-
TRACKING
COIL
T+
T-
IC2501-6,8,9,25
5.6Vp-p(20usec./div.)
SPINDLE MOTOR UNIT
TRAVERSE SWITCH
SW2
H2+
HALL2
H2-
A1
A2
A3
DVD-LS50EB/EG/GCS/GK/GN
SERVO BLOCK DIAGRAM
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