Technics SL-EH760 Service Manual page 59

OPTICAL PICKUP
Semiconductorl
aser
Q701
Laser
power
drive
+B2
+B2
Photo detector
E E
D C
A B
D C
F F
AN8739SBE2
FOCUS COIL / TRACKING
COIL / TRAVERSE MOTOR /
SPINDLE MOTOR DRIVE
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.
IC703
17 D4+
Focus
coil drive
D4-
16
15 D3+
Tracking
coil drive
14 D3-
D1+
11
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
BDO
DET.
RF
DET.
Ach
Subtracter
VCBA
Bch
Vref.
Vref.
Ech
Subtracter
Vref.
Fch
27 28 22 16
22
VREF
24
IN3
IN4 23
IN1 6
3
IN2
4
PC2
7
PVcc1 +B1
20
PVcc2
+B2 +B2
10 11
CSBRT CEA
3 ENV
OFTR 19
RFENV
TENV
DET.
OFTR 17
OFT
BDO 12
BDO
/RFDET 15
/RFDET
FE IN 25
FE OUT 24
FE
Vref.
V 3
CC
+B2
VREF 26
VREF
GND 14
Vref.
23
VREF
VREF
TRD
FOD
TVD
ECS
ECM
PC