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Technics SL-PG420A - Page 12

Technics SL-PG420A
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SL-PG420A
Mi
TERMINAL
FUNCTION
OF
IC’S
e
106501
'(482220973234/T
DA88087):
Photo
diode
signal
processor
110
Division
Current
output
of
normalized,
switched
focus
error
signal
need
Current
output
of
switched
focus
Nh
:
Division
Gain
contro!
input
of
HF
amplifier.
Current
output
from
HF
amplitude
detector
voltage
output
On/off
control
(start
input);
ready
signal
output
(starting
up
procedure
successful)
Equalizer
reference
current
input
DC
and
LF
gain
control
reference
current
input
:
Focus
normalizing
circuit
starting
current
d
PLL
on
hold
output
Track
loss
output
Drop
out
detector
suppression
input
Negative
supply
connection
for
FE
and
FElag
output
stage;
also
substrate
connection
week
16
FElag
error
signal,
intended
for
lag
network
|
0
|
Laser
amplifier
current
output
.
Laser
monitor
diode
input
Gain
control
input
for
AC
and
LF
amplifiers.
Current
output
from
LF
amplitude
detector
-
Summation
of
amplified
currents
from
D3
and
D4
:
Summation
of
amplified
currents
from
D1
and
D2
Current
inputs
to
DC
and
LF
_photo
diode
amplifier
>
=—
~“I
19
GCLF
e
iw)
“>
Oo
no
F
L
L
R
Current
inputs
to
DC
and
LF
photo
diode
amplifier
Current
input
to
HF
amplifier
Ground
connection
of
device
Decoupling
input
.
(internal
bypass)
0
Division
Connection
of
integrator
capacitor
for
(Re1—
Re2)
input
currents
Lead
output
Internal
reference
voltage
output
Gain
control
input
for
radial
error
signal
Cc
Biassing
resistor
for
current
output
for
track
jumping
RDAG
(31/5
bits)
:
StseKin
Offset
control
input
for
radial
offset
.
Nh
oS
Oo
(es)
Oo
>
E
Oo
M
2
Low
pass
filter
for
lret,
used
in
track
loss
(TL)
detector
and
LF
gain
control
Positive
supply
voltage
Frequency
setting
capacitors
for
oscillator
,
Wobble
generator
input
Biassing
resistor
for
oscillator
frequency
and
internal
amplitude
;
Radial
error
digital
signal
devided
by
four
°
Digital
output
of
sign
(Re2—Re1)
Input
control
bits
for
off-,
catch-,
play-status
and
DAC
output
current
Positive
external
voltage
input
Negative
external
voltage
input
(also
substrate
connection)
Current
output
of
amplified
(Re2—Re1)
input
currents
Radial
error
input
Voltage
output
of
integrated
(Re2—Re1)
input
currents
DEC
AG
~N
gQ
|x
2,2
afe|s
ne]
osc
i?)
Osc2
P
rc
oO
10)
a
Vref
9
22
3 2
Offset
control
output
for
radial
CLPE
Low-pass
filter
for
Re1
and
Re2,
used
for
radial
offset
control
Cc
High-pass
filter
for
Re1
and
Re2,
used
for
radial
offset
control
-
27
Input
for
amplified
currents
from
photo
diodes
Di
and
D2
Re2
Input
for
amplified
currents
from
photo
diodes
D3
and
D4
|
Coset_|
ie
|
REdig
|
|
83
|
Be
-
as
|
BO
[_Vext
(+)
|
<
x
>
a
=e
oe
:

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