Panasonic PT-50LC13 Service Manual page 45

PT-50LC13
9.6. TUNER SCHEMATIC DIAGRAM
TUNER SCHEMATIC DIAGRAM
2TNR
U7001 ENG36714GF
(UHF/VHF MAIN TUNER)
2
1
P7001 PT
1
ESD GND
TP7001
VJES0005
TO REAR JACK
C.B.A. P3501 P7002
M_TNR_VIDEO 1
GND 2
S_TNR_VIDEO 3
GND 4
M_TNR_L_AUDIO
5
GND 6
M_TNR_R_AUDIO
7
GND
8
MAIN_TUNER
5 7
3 4 6 8 9 10
C7001
2200P C7003
2200P
C7002 1000/6.3V
C7004 33P
C7005
PT
C7006
PT
C7007 1000P[KB]
C7008 0.01
TP7101
WA10
TP7501
WA10
Q7501
2SB1218A
(BUFFER)
TP7502
WA10
Q7502
2SB1218A
(BUFFER)
IC7501
AN5832SA
MTS/SAP
SIGNAL PROCESS
11 12 16
13 14 15 17 18
Q7001
PT
D7501
PT
32 31 30 29 28 27 26
NC NC
AGC IIC
DECORDER
MATRIX L+R
& MODE SW
L-R/SAP
OFFSET WIDEBAND SPECTRAL
CANCEL EXPAND EXPAND
SPECTRAL
RMS DET
WIDEBAND
RMS DET
IIC/PARA
1 2 3 4 5 6 7
J7501
WA5
Z7001 LSJA0468
24
19 20 21 22 23 25
MAIN TUNER
VIDEO LEVEL
Q7002
2SB1218A
(BUFFER)
SEPARATION
R7514
R7517
10KB 1800
10KB
2200
D7502
R7515
PT
R7516
R7512
0 WA5 56K
50KB
25 24 23 22 21 20 19 18 17
GND Vcc
SIF OFFSET PLL PILOT
DEMOD CANCEL DET
OFFSET 75us INPUT STEREO L+R PILOT L-R
CANCEL DE-EMPH VCA FILTER FILTER CANCEL FILTER
SIF/BB
SW
dbx
DE-EMPH NOISE
FILTER
SPECTRAL L-R/SAP SAP OUT SAP SAP
FILTER SW FILTER DEMOD FILTER
WIDEBAND NOISE SAP
FILTER DET DET
MUTE SIF/BB NC
AGC SW MODE FOMO
8 9 10 11 12 13 14 15 16
U7101
ENG36712GF ENG36708GY
(UHF/VHF SUB TUNER)
SUB_TUNE
2 5
1 3 4 6
C7101
2200P
R6501 PT
R6502 22K
R6503 PT
R6504
PT
R6505 PT
R6506
PT
R6507 22K
L7501
R6508 PT
100U
42 41 4
IC6501
D750066-330
LINK TO I/O CHART
TUNER
MICROCONTROLLER
1 2
TP7503
WA10
70