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3-3
BLOCK DIAGRAM
AGC
-
Automatic Gain
Control
Rose
-
Resistor
wobble
oscillator
B0-B3
-
Control
bits
for radial
circuit
Rwob
- Wobble
generator
input
BEQ
-
Equalizer reference current input
RE1
-
Radial error signal
1
(summation
of
BGC
-
DC
and LF
gain control reference input
amplified currents
D
3
and
D
4
Coscl
-
Capacitor
wobble
oscillator
RE2
-
Radial error
signal
2
(summation
of
Cosc2
-
Capacitor
wobble
oscillator
amplified currents
D
1
and
D
2
DEC
-
Decoupling
input of inkruat
bypass
RE
dig
-
Radial error
digital
DET
-
HF
detector voltage input
RE
lag
-
Radial error
signal for
LAG
network
DIV4
-
Divide
by 4
input
Sc
-
Starting
up
capacitor
input
DODS
- Drop
out detector
suppression
Si/RD
-
On/off
control
for
laser
supply
and
focus
DU4
-
Photodiode
currents
circuit.
Ready
signal,
Starting
up
FE
- Focus
error signal
procedure
succesful.
FE
lag
- Focus
error signal for
LAG
network
TL
-
Track
loss
output
signal
HF
-
HF
output
for
DEMOD
TTM-
-
Control voltage
for
turntable
motor
HFD
-
HF
detector output
for
DEMOD
TTM+
-
Control voltage
for
turntable
motor
HF-in
-
HF
current input to
HF
amplifier
Vext-
-
Supply connection
HF-out
-
HF
amplifier
and
equalizer voltage output
Vext+
-
Supply connection
LM
-
Laser monitor diode
input
TCMP
-
Turntable
control
motor
pulse
LO
-
Laser
amplifier
current output
MC
- Motor
control signal
offset
IN
-
Offset control input
offset
OUT
-
Offset control
output
PLLH
-
PLL
on
hold
output
RADout
-
output
of
RE2-RE1
input
RE
-
Radial error signal (Amplified
RE
2
-RE
1
currents)
ATSB
-
Attenuation
of
Audio
level
in
Search
MUSB
-
Soft
Mute
signal
position
(Cueing)
PD/OC
- Phase
detector
-
oscillator
control
CD
ROM
-
Digital
Data
information
on
disc signal
QCL
-
Q-channel Clock
signal
Switch
QDA
-
Q-channel Data
signal
CEFM
- Clock
Eight-to-Fourteen
Modulator
QRA
- Q-channel Request Aknowledge
CLAB
-
Clock
signal
Decoder-A
to Filter-B
SCAB
-
Subcode
clock
Decoder-A
to Filter-B
CLBD
-
Clock
signal
Filter-B to
DAC
SDAB
- Subcode
data
Decoder-A
to
Filter-B
CREF
- Reference
Current
SWAB/SSM
-
Subcode
Word/Start-stop motor
signal
CRI
- Counter Reset
Inhibit
WSAB
-
Word
select
Decoder-A
to Filter-B
DAAB
-
Data
signal
Decoder-A
to Filter-B
WSBD
-
Word
Select
Filter-B to
DAC
DABD
- Data
signal Filter-B to
DAC
XIN
-
Oscillator signal
in
Decoder-A
DEEM
- Deemphasis
XSYS
-
Oscillator signal
out
Filter-B
DOBM
-
Digital
out
signal
EFAB
-
Error
flag
Decoder-A
to Filter-B
MUTE
- Mute
signal
CS
22
791
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