7-2. PIF Block Diagram
Fig. 7-2-1
AUDIO SIGNAL
VIDEO SIGNAL
TMDH2–032A
CH SW
S001
RF VIDEO IN
TUNER VIDEO OUT
ON / OFF 5V
EVER 37V
TO VIDEO
TO POWER
SCL1
SDA1
TV VTR
(RF AUDIO IN)
(TUNER AUDIO R OUT)
(TUNER AUDIO L OUT)
TO SERVO
TO AUDIO
AFT
ANT IN
ANT OUT
H001
SPLITER
RF SW
LPF
HPF
BPF
TUNING
TUNING
TUNING
TUNING
IF
IF
VIDEO
FM
VIDEO
TRAP
4.5MHz OSC
PLL
SAW
RESONATOR
CIRCUIT
ANT IN
RF OUT
PC44818D
HA11560FP
MIX / OSC
AJ605A
IF MODULE
4.5MHz
BPF
LPF
TUNING
TUNING
RF
AMP
RF
RF
AMP
AMP
AMP
DET
AMP
RF MODULATOR
TUNE
IF
PIF / SIF LA7578N
7
INPUT
ATTENUATOR
DEMODULATION
SAP
SWITCH
STEREO / SAP
INTERFACE
1 C BUS
BLOCK
BLOCK
DEMODULATION
STEREO
REDUCTION BLOCK
DBX NOISE
ABSORPTION
OFFSET
D / A
15
16
MATRIX
SELECTOR
26
25
27
CONVENTIONAL AUDIO OUT
3 IN 1 TUNER
ICD01 µPC1854AGT
MULTIPLEXED TELEVISION
SOUND PROCESSING SYSTEM
2
32V
REG
BUFFER
ATT
AUDIO IN
CH SW
MB(5V)
CONTROL
VIDEO IN
NC
NC
ADDRESS
S.CLOCK
S.DATA
TU(32V)
AUDIO OUT
AFT
VIDEO OUT
IF OUT
19
18
15
16
13
11
10
9
8
7
6
5
4
3
2
1
12
NC
PB(5V)