Block Diagram - Panasonic SA-AK78 Service Manual

SA-AK78

13 Block Diagram

CD CHANGER SECTION
•
OPTICAL PICKUP
SEMICONDUCTOR
LASER
+B2
PHOTO DETECTOR
E E
D C
A B
D C
F F
FOCUS COIL
F+
F-
TRACKING COIL
T+
T-
TRV+
M
M701
TRAVERSE
MOTOR
TRV-
SP+
M
M702
SPINDLE
MOTOR
SP-
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AN8839NSBE2
IC701
SERVO AMP
6
LPD
Q701
Vref.
Laser
7
LD
power
Vref.
drive
+B2
4
PDA
Vref.
13
LDON
Vref.
5 PDB
1 PDE
E
Vref.
2 PDF
F
Vref.
AN8739SBE2
IC703
FOCUS COIL / TRACKING
COIL / TRAVERSE MOTOR /
SPINDLE MOTOR DRIVE
17 D4+
16 D4-
D3+
15
14 D3-
11 D1+
10 D1-
D2+
13
12 D2-
8
PGND1
19
PGND2
(RF)
TJ701
8 9
RF RFIN
Vref. RF
DET.
A Ach
VCBA
Bch
B
Vref.
Vref.
Ech
SUBTRACTER
VCBA
Vref.
Fch
27 28
22
VREF
FOCUS
24
IN3
COIL
DRIVE
TRACKING 23
IN4
COIL
DRIVE
TRAVERSE
6
IN1
MOTOR
DRIVE
IN2 3
SPINDLE
MOTOR
DRIVE
4
PC2
RESET
7
SIGNAL
+B1
PVcc1
GENERATOR
20
PVcc2
/RST
1
16
+B2 +B2
10 11
CSBRT CEA
3 ENV
OFTR
TENV
DET.
OFTR
BDO
BDO
DET.
/RFDET
FE IN
SUBTRACTER
FE OUT
Vref.
V
VREF
Vref.
GND
Vref.
Vref.
22 16 23
19
RFENV
17
OFT
12
BDO
15
/RFDET
25
24
FE
CC 3
+B2
26
VREF
14
VREF
(VREF)
TJ702
TRD
FOD
TVD
ECS
ECM
PC