13
SCHEMATIC DIAGRAM-5 (TUNER/IF SECTION)
*
N O T E : V O L T A G E P B O R R E C M O D E
:REC AUDIO SIGNAL
:PB AUDIO SIGNAL
:REC VIDEO SIGNAL
:PB VIDEO SIGNAL
0
2 . 8
2 . 1
FM
MODULATOR
VIDEO
MODULATOR
OFF
THROUGH SW
ANT
IN
OUT
TO
TV
RF CARRIER
OSC
4.5MHz
TANK
VHF
RF AMP
MIXER
IC
IF
AMP
SAW
FILTER
FM
DETECTOR
SIF
FILTER
VIDEO
DETECTOR
UHF
RF AMP
UHF
MIXER
VHF
OSC
UHF
OSC
PLL
AGC
AFT
1
2
3
4
REG5V
CONTROL
6
RF AGC
7
NC
8
ENABLE
NC
REG5V
NC
TU30V
NC
IF
NC
5
9
10
11
12
13
C701
4.7/50
C704
0.1/50
ZD701
MTZ33B
14
17
19
18
16
15
20
IF
BLOCK
TUNER
BLOCK
MODULATOR
BLOCK
2E
1E
4B
3B
2B
1B
GND
36V
5.1VD
REG9V
AUDIO(TU)
MOD AUDIO
1F
2F
VIDEO(TU)
VIDEO(LINE)
1G
2G
3G
4G
5G
6G
1G
6G
VIDEO
VIDEO(ACSS)
AFT
IIC DATA
IIC CLOCK
VCR "H"
To
SYSCON/
SERVO
SECTION
1F
2F
To
A/V
SECTION
,
1B
4B
To
POWER
SECTION
1E
2E
To
Hi-Fi
SECTION
,
A MAIN(TUNER/IF SECTION)C.B
C710
0.1
C705
470/6.3
R703
470
Q701
KTA1267
L701
27u
R701
3.9K
C709
220/6.3
R707
470
R706
470
R702
1K
R708
33K
C708
3.3/50
C703
0.01
R711
18K
R710
1.5K
C702
220/6.3
TU701
TADC-H002F
TUNER
SW701
CH3
CH4
VHF/UHF/CATV
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