Block Diagram - Panasonic SC-AK48 Service Manual

17 Block Diagram

CD CHANGER SECTION
CD OPTICAL PICKUP
SEMICONDUCTOR
LASER
Q701
LASER
POWER
DRIVE
+B8
+B2
PHOTO DETECTOR
E E
D C
A B
D C
F F
FOCUS COIL
F+
F-
TRACKING COIL
T+
T-
TRV+
M701 M
TRAVERSE
MOTOR
TRV-
SP+
M702
M
SPINDLE
MOTOR
SP-
AN8839NSBE2
IC701
SERVO AMP
6
LPD
Vref.
7
LD
Vref.
Vref.
4
PDA
A
Vref.
13
LDON
B
Vref.
5 PDB
Vref.
1 PDE
E
Vref.
VCBA
Vref.
2 PDF
F
Vref.
17 D4+
FOCUS
COIL
DRIVE
16 D4-
15 D3+
TRACKING
COIL
14 D3-
DRIVE
11 D1+
TRAVERSE
MOTOR
DRIVE
10 D1-
13 D2+
SPINDLE
MOTOR
DRIVE
12 D2-
RESET
8
SIGNAL
PGND1
GENERATOR
19
PGND2
/RST
1
(RF)
TJ701
8 9
RF RFIN
RF
DET.
A ch
SUBTRACTER
VCBA
B ch
Vref.
Vref.
E ch SUBTRACTER
F ch
27 28 22 16
22
VREF
24
IN3
23
IN4
6
IN1
3
IN2
4
PC2
7
PVcc1 +B1
FOCUS COIL / TRACKING
20
COIL / TRAVERSE MOTOR /
PVcc2
SPINDLE MOTOR DRIVE
69
+B2 +B2
10 11
CSBRT CEA
3 ENV
OFTR 19
TENV
DET.
OFTR 17
BDO 12
BDO
DET.
/RFDET 15
FE IN 25
FE OUT
24
Vref.
V
CC
26
VREF
GND 14
Vref.
Vref.
23
VREF
AN8739SBE2
IC703
SA-AK48
RFENV
OFT
BDO
/RFDET
FE
3
+B2
VREF
VREF
TRD
FOD
TVD
ECS
ECM
PC