Technics SL-P202A - TERMINAL FUNCTION of ICs

m@ TERMINAL FUNCTIONS OF IC’s
© 1C6501 (TDA8808T): Photo diode signal processor
| Pi | 1/0 “| Pi 1/0
in . in 7
No. Mark Division Function No. Mark Division Function
Gain control input of HF amplifier. 15 FE O Current output of normalized,
1 GCHF | Current output from HF amplitude switched focus error signal
4 detector Current output of switched focus
2 Vp ! Positive supply voltage 16 FElag ie) error signal, intended for lag
So . 7] network
3 HFout O HF amplifier and equalizer voitage =
i output LO oO Laser amplifier current output
4 DET 1 HF detector voltage input LM I Laser monitor diode input
=
5 Sc I Starting up capacitor input Gain control input for AC and
GCLF I LF amplifiers. Current output
On/off
control
(start
input);
from
LF
amplitude
detector
6 Si/RD 1/0 ready signal output (starting up
procedure successful) Re2 [= Oo Summation of amplified
F a currents from D3 and D4
7 Beq | Equalizer reference current input
, Summation of amplified
8 Bgc \ DC and LF gain control reference Ret oO currents from D1 and D2
current
input
4
a Ts Current inputs to DC and
9 |FOC START | Focus normalizing circuit 1,02 LF photo diode amplifier
starting current
10 PLLH O PLL on hold output D3, D4 peat ae te
u mH o 1 Track loss output HFin I Current input to HF amplifier
12 DODSs 1 adit out detector suppression
P GND | Ground connection of device
Negative supply connection for
13 Vext I FE and FElag output stage; also ee 1
substrate connection DEC l Decoupling input
(internal bypass)
Low pass filter for Iret, used in
14 LPF (e) track loss (TL) detector and
LF gain control
e 1C6503 (TDA8809T): Radiat error signal processor
1/0 . 1/0 ,
Mark
Division
Function
Division
Function
|
1 Vp | Positive supply voltage Lag | fpieet cv eahieen capacitor ?
or (Re1 — Re2) input currents
2
Cosc1
Fre
i
i
quency setting capacitors for
3 Goes i] oscillator Lead Oo Lead output
+ - Vref | Internal reference voltage output
4
Rwob
|
Wobble
generator
input
;
L +. — - - AGC | Gain contro! input for radial
5
Rosc
'
Biassing
resistor
for
oscillator
error
signal
frequency and internal amplitude - Biassi - ; 4
=e a - lassing resistor tor current output
6
DIV4
!
Divide-by-4
input
RDAC
0
for
track
jumping
(3%
bits)
[_
7
REdig
|
O
Digital
output
of
sign
(Re2
—
Re1)
6hsécin
;
Offset
control
input
for
radial
8 B3 offset
9
B2
|
Input
control
bits
for
off-,
catch-,
offset
off
Oo
mii
control
outputtor
radial
10
B1
plat-
status
and
DAC
output
current
enon
ins
set
—
Low-pass filter for Re1 and Re2,
11 BO CERF ! used for radial offset control
12
Vext(+)
I
|
Positive
external
voltage
input
CHPF
;
High-pass
filter
for
Re1
and
Re2,
13 Wextt) ' Negative external voltage input used for radial offset control
{also substrate connection) Ret | Input for amplified currents from
14
GND
1
GND
terminal
|
photo-diodes
D1
and
D2
Current output of amplified Input for amplified currents from
1 OMe a (Re2 — Re1) input currents one photo diodes D3 and D4
16 REin i I | Radial error input
Voltage output of integrated
1 :
Z REled 0 (Re2 — Re1) input currents [
eof Om