Technics SL-PG200A

SL-PG200A
Mi TERMINAL FUNCTIONOF IC’S
¢
1C6501
(482220973234/T
DA8808T):
Photo
diode
signal
processor
F
ue
Function
Mark
‘
fo
Function
Division
i
Division
Gain
control
input
of
HF
Current
output
of
normalized,
amplifier.
A
FE
e
switched
focus
error
signal
GCHF
I
gna
Current
output
from
HF
amplitude
detector
Current
output
of
switched
focus
Vp jl Positive supply voltage FElag error signal, intended for lag
network
HF amplifier and equalizer
HFout ie)
voltage
output
Laser
amplifier
current
output
DET I HF detector voltage input
: a Laser monitor diode input
Sc I Starting up capacitor input
On/off control (start input); Gain control input for AC and LF
Si/RD ke) ready signal output (starting up amplifiers. Current output from
procedure successful) | LF amplitude detector
Equalizer
reference
current
input
Summation
of
amplified
currents
DC and LF gain control reference from D3 and D4
current input
oy a Summation of amplified currents
Focus normalizing circuit from D1 and D2
starting current
PLL on hold output Current inputs to DC and LF
photo diode amplifier
Track loss output
Current inputs to DC and LF
Drop
out
detector
suppression
: :
|
li
hoto
diode
amplifier
input +
Negative
supply
connection
for
i
Current
input
to
HF
amplifier
FE
and
FElag
output
stage;
also
substrate
connection
Ground
connection
of
device
Low
pass
filter
for
Iret,
used
in
—
track
loss
(TL)
detector
and
LF
Decoupling
input
gain
control
(internal
bypass)
*
1C6503
(482220973235/TDA8809T):
Radial
error
signal
processor
Function
Mark
U0
Function
No. | | Division
|
Positive
supply
voltage
al
Connection
of
integrator
18 Lag capacitor for (Re1—Re2) input
currents
Frequency setting capacitors for
oscillator [
pu generator input 19 Lead o | Lead output
Biassing
resistor
for
oscillator
20
Vref
|
Internal
reference
voltage
output
frequency
and
internal
Se
amplitude
24
AGC
Radial
error
digital
signal
+
devided
by
four
“|
Biassing
resistor
for
current
22
oO
output
for
track
jumping
(3/2
bits)
Gain control input for radial error
signal
Digital output of sign (Re2—Re1)
Input control bits for off-, catch-, 23
play-status and DAC output
current
offset in offset
1
| iF Offset control input for radial
Offset control output for radial
offset
24 | offset off
|
[Positive
external
voltage
input
-
Low-pass
filter
for
Re1
and
Re2,
used for radial offset control
Negative external voltage input 25 CLPF
(also substrate connection) |
GND terminal 26 CHPF
a Current output of amplified
(Re2—Re1)
input
currents
Input
for
amplified
currents
from
photo diodes D1 and D2
VHigh-pass filter for Re1 and Re2,
4 used for radial offset control
Radial error input
Voltage output of integrated Input for amplified currents from
(Re2—Re1) input currents photo diodes D3 and D4