Noblex 21TC657, Service Manual

Page: 7 / 30

IC Block Diagrams
-7-
IC002 < Audio AMP. > LA42052-E
Thermal
Protection
-
+
AMP
Pump
Up
1
INVER
TING
INPUT
2
Vcc
3
PUMP UP OUT
4
GND
5
Ve
r.
OUTPUT
6
OUTPUT ST
A
GE Vcc
7
NON INV
.
INPUT
IC501 < Vertical Output > LA78040N, TDA9302H
10 11
LFLT
VCO
12
PCINT1
PCINT2 PLINT
13
VCA
LPF
FLT
19
COMPIN
Vcc
17
Analog Block GND
23 NOISETC
18
SAPTC
14 15
VG
R
IREF
IREF
7 6
5
I
2
C BUS I/F
Digital Bloc
k GND
SCL SD
A
SAPIND
NOISE
DET
SAPVCO
BPF
STIND
1/4 1/2
LPF
DeEm LPF
LPF
DeEm
AMP
(+4dB)
LPF
SW
24
25 22
SAPOUT
SAPIN
STIN
26 27 28
VE
VEWGT
LPF
HPF
LOGIC
NRSW/FOMO/SAPC
VCA
21 9
SUBOUT (L-R signal output)
MAIN OUT (L+R signal output)
8
MATRIX
VE
VCA
RMSDET
RMSDET
29 30 32 31 1
VETC
VEOUT
VCAIN
VCA
WGT
VCA
TC
TREBLE OUT
-L
SPECTRAL
34 33
FEXT1
TVSW
EXT1/EXT2/M1
M2
SURR
SURROUND
BASS
BASS
TREB
BASS
TREBLE
TREB
V
OL-L
V
OL-L
V
OL-R
48
V
OLIN-L
4
LSOUT
-L
3
LSOUT
-R
V
OL-R
VOLUME RIGHT
CHANNEL INPUT
43
44 TREBLE OUT-R
41
47 TREBLE FILTER-L
45
2 BASS FILTER-L
40 SURRTC
38 TVOUT-R
39 TVOUT-L
36
37
AUX2-L
(Left channel
external input)
FEXT2
INPUT PIN OF (L+R) SIGNALFR
OM
MAIN OUT(PIN9)
(+6dB)
WIDEBAND
"STEREO"
"NOISE"
"SAP"
"PONRES"
ATT/ATTSW
BASS FILTER-R
(Stereo b
loc
k
PLL loop filter integ
rating
pin)
(Pilot cancel circuit loop filter interg
rating pin)
(Audio multiplexing
signal input)
AUX2-R
(Right channel
external input)
TREBLE FILTER-R
A
UX1-L(Left channel
e
xter
nal input)
A
UX1-R(Right channel
e
xter
nal input)
(Band gap ref
erence
output)
(Sap FM detector output)
(Input of L-R signal from SUBOUT)
(Input of SAP signal)
(V
ar
iab
le de-
emphasis integ
rating pin)
(V
ar
iab
le de-emphasis
output pin)
IC3401 < MTS Decoder, Audio Control & Switch > CXA2134QP
1
2
3
PRE
GND
4
6
7
8
IN2
10
AMP
5
POWER
GND
IN1
RIPPLE
FILTER
P.P
VCC
STANDBY
OUT2
12
OUT1
AMP
INPUT AMP. OUTPUT AMP.
THERMAL
PROTECTION
CIRCUIT
AMP AMP
AMP
REF AMP.
RIPPLE FILTER
BLOCK
POP NOISE PREVENTION
BLOCK
INPUT AMP. OUTPUT AMP.