Panasonic CT-27SL15 Service Manual page 28

A B
8
7
6
5
FROM/TO MICON
AFT
SCL
SDA
SW_AUDIO_L
SW_AUDIO_R
4
TO SOUND
SW_AUDIO_L
SW_AUDIO_R
3
FROM COMB/FILTER/AV
AUDIO_IN1/2[R]
AUDIO_IN1/2[L]
AUDIO_IN3[R]
2
AUDIO_IN3[L]
1
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
A B
G-11
C D
TUNER/STEREO SCHEMATIC DIAGRAM
(MAIN PCB)
TU001 ENG36A29GF
19
18
NC NC NC NC NC NC NC
W833
NC
2.3 2.3 2.3 2.3 0
24 23 22 21 20
OUT SW DAC ZAP
AGC
Switch L-R Filter
Matrix
De-Emph (L-R)/SAP
75us
L+R Filter
Filter
Cancel
SAPout
Offset
Expand
Cancel
Wide Band
RMS Det
Offset
Wide Band
2.3
1 2 3 4 5
0 2.3 2.3 2.2 2.2
NOTE:THE DC VOLTAGE AT EACH PART WAS MEASURED
WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST
WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.
C D
E F
20
21
NC NC NC
R001
68K 1/2W
R002
68K 1/2W
L901
100uH 0305
5.0 5.0 0 3.7 3.6 2.6 3.7
19 18 17 16 15 14 13
GND
Det VCA Det
IIC Decoder St.PLL
Pilot Input SAP
L-R Demod Cancel
Pilot
Filter Filter Filter
L+R Demod Stereo Noise SAP
Demod
Filter Filter
fH.2fH Trap Filter
SAP
Wide Band Spectral
Expand RMS Det Det
dbx De-Emph
Spectral Spectral Noise
Vcc
6 7 8 9 10 11 12
0.4 5.1 2.4 2.4 0.4 2.3 3.4
ATTENTION
:LES PIECES REPAREES PAR UN ETANT
DANGEREUSES AN POINT DE VUE SECURITE
N'UTILISER QUE CELLS DECRITES
DANS LA NOMENCLATURE DES PIECES
E F
G
FROM/TO CHROMA
TUNER+5V
TUNER_VIDEO
P.CON+5V
FROM POWER
P.CON+B
GND
CAUTION
:SINCE THESE PARTS MARKED BY ARE
CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY
G
H
8
7
6
5
4
3
2
PCB070
CME021
1
H
G-12