Panasonic PV-4601 A Service Manual page 179

UHF/VHF TUNER/TV DEMODULATOR SCHEMATIC DIAGRAM
TO MAIN
R14 C8
PIN-5 VIDEO 5
R11
PIN-4 TV (H)/VCR (L) 4
R16 R15
PIN-3 UNSW +5V (VIDEO) 3
R10
PIN-2 3/4 CH 2
PIN-1 AUDIO 1
5
R2 C7
C29
R7
C15
Q1
R3
L1
IC1
C9
C1
C14
Q2
UHF/VHF UHF/VHF R4
L2
4
C2
R6
L4
R1 C4 C10
Q4
L6
3 L101
R12 C57
L8
C52
C6 C28
BAN1
R91
L5 BAN2
L102
C16 C22
R53
C58
C110
R56
2
C169
R93
C60
1
A B C
(B)
VIDEO SIGNAL AUDIO SIGNAL
X1
R57
C17
C30
C24 C52
C23
C31
DT107
L112
16 15 14 13 12 11 10 9 L113
DT108
ANT
VIDEO
CARRIER RF CARRIER
SW
OSCILLATOR
OFF SW
CLAMP
R51
WHITE VIDEO
CLIP
MODULATOR AMP
AUDIO AMP
FM R63 R69
CARRIER
MODULATOR CHANNEL SW C53
MODULATOR
C63 C72
1 2 3 4 5 6 7 8
C55
C11 C19
Q102
R80
C77
R54
T1
C12
R72
R8 C73
C87
L107
DT102
C81
C21 C32 C25
R9 R68 C76
DT101
C18
C54
R64
R13 C67 R75
L7
C13 C20 R76
DS104
L106 R66
C82 R78
C83 C98
R82
C58
DS107
DS105
C170 C65
C114
L119
R59
L103
DS101
C69
R98
R62
L104
DT106
C130
R95
DS106
R60
C66
L118 C131
R96
C115 C116
L105
C122
R67
C171
C70
R94
R117
C51
C117
C71
D E F G
C75
R56
CT2 CT3
Q101 C84
R70
R108
L114 C59
C93
C101
L115
R61 DT110
R74
DT109
C149
R52
R71
L115
C56 R55 C74
C79
C92
R81
R65
C97
R83
C85
R79 R110
C80 C86 C95
R87
C106
C96 C156
C88 C51
L110 DT104
C103
L111
TP100
C100
C90
DS103
C99
C158
DT105
C89
C107 RSARSB
C104
L108 L109
R89
DT103
R88
C111
R85
C118 R84
C109 L117
L121
C102
R92
C94
R90 IC102
R115
C112
C133
20 19 18 17 16 15
14 13 12 11
C105 R86
IC101
R100
1 2 3 4 5 6 7 8 9 10
C129
C125
C124
C127 C121 C123
C120
R101
C119
R97
C128
C138
C135 C134
L120
C126
DT111
C135
R99
L122 DT112
C140
R102 R104
R103
R107
C91
C139 C137
C133
H I J
NOTE:
FOR SCHEMATIC AND C.B.A. DIAGRAM NOTES, REFER
TO BEGINNING OF SCHEMATIC SECTION (SECTION III)
R113
R112
R111
R116
C151 C152 C153 C162 C155 C167 C146
C165
R109
C166
C160
X101
C154
X301
C158
SAW
FILTER
16 15 14 13 12 11 10 9
1 2 3 4 5
20
OUTPUT
TUNING SIF
OSD GATE
AMP
CONTROL
VOLTAGE
CONTROL
DIVIDER
POWER-ON IN-LOCK
15-BIT FREQ.
REGISTER RESET DETECT
LOGIC
IC301
C301
RSA RSB
15-BIT 7-BIT
DIGITAL
CHARGE
DIVIDER CONTROL
PHASE
PUMP
REGISTER
COMPARATOR
PRESCALER 4-BIT BAND SWITCH R302
R301
DIVIDE-BY-B REGISTER
1
GND VCC1 VCC2
L305 L303
C316 R306
1 2 3 4 5 6 7 8
R307
C317
C315
X302
Q301
L304
R310
R105
R312
C142 C143 C144 C145 C147
C132
R311
R106
K L M
TO MAIN
11 CH FREQUENCY LOCK (L) PIN- 11
10 DTS CS (H) PIN- 10
9 SERIAL DATA 0 PIN-9
8 SERIAL CLOCK PIN- 8
7 +30V PIN- 7
UNSW +5V (VIDEO) 6
6 PIN-
C148 C150 C159 C161 C154 C163
IMPORTANT NOTICE:
1 IF PARTS OF TUNER AND FS SECTION ARE
REPLACED INDIVIDUALLY. THE FCC SPECIFICATIONS
WILL NOT BE SATISFIED.
DURING SERVICING. PLEASE REPLACE AS A UNIT.
2 SINCE THE UHF/VHF TUNER/TV DEMODULATOR UNIT
HAS ALREADY BEEN PRE-ADJUSTED AT THE FACTORY,
DO NOT TRY TO ADJUST THE UHF/VHF TUNER/TV DEMODULATOR UNIT.
THE UHF/VHF TUNER/TV DEMODULATOR UNIT REPLACEMENT PART
IS AVAILABLE ONLY AS A COMPLETE ASSEMBLY UNIT.
C312
T301 C313
C311
VCO
C310
19 18 17 16 15 14 13 12 11
VCO
AFC
DET.
INTERNAL R317
VOLTAGE
STABILIZER
FPLL
R315
TUNER AND
SINGLE
VIF-AGF
REFERENCE
QSS
C309
MIXER
VIDEO DEMODU.
&AMP
SIF- FM
AGC DET.
VIF
AMP
2 3 4 5 10
6 7 8 9
R314
R318
R304
C307
WF33
C303 C308
C306
TO MAIN
C305
X303
18 VIDEO PIN- 18
17 UNSW +5V (VIDEO) PIN- 17
16 AFC PIN- 16
15 GND PIN- 15
R303
14 AUDIO PIN- 14
C302 R305
13 SW +12V PIN- 13
R316
12 PIN- 12
VR301
WF32
R313
C314
UNLESS OTHERWISE SPECIFIED:
WATTAGE OF RESISTORS ARE 1/8W AND 1/16W.
N O P Q