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IC BLOCK DIAGRAM & DESCRIPTION
IC902 LC78622E(Degital Signal Processor)
EFMO
9
1
Slice level
DEFI
Control
EFMIN
10
Syncrnous Detect
22
FSEQ
EFM Demodulation
12
CLV+
CLV
Digital Servo
13
CLV-
14
V/P
PW
49
SBCK
51
Subcode Dxract
47
QCRC
SBSY
SFSY
50
63
CS
53
WRQ
COM
Inter Fase
55
SQOUT
CQCK
57
56
COIN
Servo Commander
54
RWC
15 16
17
20
HFL
TES
TOFF
JP-
IC301 LA4227(Power Amp)
VCC
BS1
OUT1
12
11
10
Ch1
THERMAL
SHUT DOWN
PROTECTION
STANDBY
SW
Ch2
1
2
3
STANDBY
OUT2
BS2
VV
VV
PDO ISET FR
PCK
DD
SS
6
4
3
5
7
21
VCO Clock Oscillator
& Clock Control
General Ports
19 58
18
24 25 26 27 28
29
JP+
RES
TGL
CONT1
CONT3
CONT5
EMPH
CONT2
CONT4
NF1
PRE GND
IN1
9
8
7
-
+
BIAS
CIRCUIT
+
-
4
5
6
NF2
IN2
DC
(FILTER)
TST11
TEST2
TEST4
TAI
TEST1
TEST3 TEST5
V
V
DD
SS
2
59 64 11 32 33 62
23
8
2K,8bit
RAM
C1 C2 Error Detect &
Correct Control Flag
Quadruple Over Sampling
X'tal Root
Timing Generator
48
60 61 46 52 45 44 43
39 41 42
EFLG
16M
4.2M
FSX
XIN
XV
RV
DD
DD
XV
XOUT
RV
MUTER
SS
SS
IC501 LC75342(2 Band Equalizer)
LSELO LIN LTRE
10
L4
11
L3
12
L2
13
L1
14
NC
15
NC
16
R1
17
R2
18
R3
19
R4
20
21
RSELO RIN RTRE
- 8 -
RAM Address
Generatorl
Interpolalation Mute
30
Billingual
Digital Out
31
Digital Attenuator
Digital Filter
34
1bit DAC
L.P.F
40
37
35
38
36
RCHO
LCHO
MUTEL
LV
DD
LV
SS
LBASS1 LBASS2
9
8
7
6
LVref
CONTROL
CIRCUIT
LOGIC
CCB
CIRCUIT
INTERFACE
CONTROL
CIRCUIT
RVref
22
23
24
25
RBASS1 RBASS2
C2F
DOUT
(NC)
LOUT
5
4
TEST
3
V
SS
2
CE
1
DI
30
CL
29
V
DD
28
Vref
27
NC
26
ROUT
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