Panasonic SL-VP48 Service Manual page 54

OPTICAL PICKUP
SEMICONDUCTOR
LASER
Q201
LASER
POWER
DRIVE
+B7
PHOTO DETECTOR
E E
D C
A B
D C
F F
+B3
FOCUS COIL
F+
F-
+B3
TRACKING COIL
T+
T-
+B3
M
TRAVERSE
MOTOR
+B3
M
SPINDLE
MOTOR
AN8839NSB-E1
IC101
SERVO AMP
6 LPD
Vref.
Vref.
7 LD
Vref.
4
PDA
A
Vref.
5 PDB
B
Vref.
Vref.
1 PDE
E
Vref.
Vref. VCBA
2 PDF
F
Vref.
13
VBG
1
PVcc1 VM1
MONITOR
6
RO1
8
FO1
7
PGND1
16
PVcc2
11
RO1
9
FO2
10
PGND2
17
PVcc3
22
RO3
24
FO3
23
PGND3
32
PVcc4
27
RO4
25
FO4
26
PGND4
TSD RESET
GND
VGO
14
RF
8 9
RF RF IN CS BRT
RF
DET.
SUBTRA-
Ach
CTOR
VCBA
Bch
Vref.
SUBTRA-
Ech
CTOR
Vref.
Vref.
Fch
27 28 16 22
AN8746SA-E1
IC401
COIL & MOTOR DRIVE
3
MON
FI1 4
RI1 5
2
Vcc
+B6
13
FI2
RI2
12
20
FI3
21
RI3
29
FI4
28
RI4
19
VG1
VG
LIMITTER
30
PC
31
AC
+B6
18
+B7 +B7
10 11
CEA
ENV 19
RFENV
OFTR
3 TENV
DET.
OFTR 17
BDO 12
BDO DET.
/RFDET 15
NRFDET
FE IN 25
FE OUT 24
Vref.
Vcc 3
+B7
ENV OFF 20
GND 14
Vref.
VREF 26
NC 18
Vref.
23
21
VREF
TRV+
SPPOL
SPOUT
OFTR
BDO
FE
MUTE
VREF
MON
FO+
FO-
TR+
TR-
TRV-
VG