Technics SL-PJ37A

me TERMINAL FUNCTIONS OF IC’S
e 1C6501 (TDA8808T): Photo diode signal processor
Pin 1/0 is 1/0 .
No. Mark Division Function Mark Division Funetion
[ Gain control input of HF amplifier. FE re) Current output of normalized,
1 GCHF I Current output from HF amplitude switched focus error signal
} detector Current output of switched focus
2 Vp Positive supply voltage FElag 0 error signal, intended for lag
HFout re) HF amplifier and equalizer voltage network
3 ou output LO 0 Laser amplifier current output
a
4 DET | HF detector voltage input LM | Laser monitor diode input
| 5 | Sc | Starting up capacitor input Gain control input for AC and
+— 7 GCLF | LF amplifiers. Current output
aie On/off control (start input); :
6 Si/RD 1/0 ready signal output (starting up | eevee from LF amplitude detector
procedure successful) Re2 re) Summation of amplified
currents from D3 and D4
Equalizer reference current input
7 ; Summation of amplified
8 Bgc \ ee ea control reference Ret oO Guirerits from Diand'D?
aicaal
a
wa
Current
inputs
to
DC
and
9 |FOCSTART| | Ce circuit ae 28) | DI De LF photo diode amplifier
ae T Current inputs to DC and
H P 24,25; D3, D4 : ve
ue + teed e Lien noldiourput als j LF photo diode amplifier
eae, FE D-__} Track loss output 4 26 HFin 1 Current input to HF amplifier
12 DODS \ pte, out detector suppression r 2 ar SE |
mi be P 27 GND ! Ground connection of device
Negative supply connection for
13 Vext | FE and FElag output stage; also 5 baie Decoupling input =
substrate connection 28 DEC I : UPling inpu
(interna! bypass)
Low pass filter for Iret, used in
14 LPF oO track loss (TL) detector and
LF gain control
ah ee ee es ee
e 1C6503 (TDA8809T): Radial error signal processor
7/0 P 1/0 :
Mark
Division
Function
Division
Function
1 Vp bes t Positive supply voltage 18 Lag | Sau Ie capacitor
or (Re1 — Re2) input currents
2 Cosc1 F ; ;
requency setting capacitors for
3
Cosc2
oscillator
a
6)
=}
Lead
output
rm 7 ——_—_— re | Internal refe voltage output
4
Rwob
|
|
Wobble
generator
input
breed
2
z
re — - - 21 AGC \ Gain control input for radial
5 Rose \ Biassing resistor for oscillator error signal
frequency and internal amplitude i + Spike ;
i Diva ae , lassing resistor for current output
i pe ee | Divide-by-4 input = BRAS 2 for track jumping (3% bits)
7
|
REdig
Oo
Digital
output
of
sign
(Re2
—
Re1)
23
bien
|
Offset
control
input
for
radial
8 B3 offset
— ar x
9 B2 | Input control bits for off-, catch-, 24 offset off 16) ao Gontrolouspus tor faaliel
10
B1
play-status
and
DAC
output
current
—
echt
+
Low-pass filter for Rel and Re2,
11
BO
25
CLEF
:
used
for
radial
offset
control
|
12
Vext(+)
||
Positive
external
voltage
input
26
CHPE
;
High-pass
filter
for
Re1
and
Re2,
13 Vext(—) | Negative external voltage input used for radial offset control
be {also substrate connection) 27 Rei | Input for amplified currents from
14
|
GND
[
|
GND
terminal
L
photo-diodes
D1
and
D2
15 RADout O Current output of amplified 28 Re2 | Input for amplified currents from
L (Re2 — Ret) input currents photo diodes D3 and D4
16
REin
|
Radial
error
input
7 REI Voltage output of integrated
ag 9 (Re2 — Re1) input currents