Technics SL-HD550, Service Manual

Page: 35 / 63

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