Panasonic CT-20SL15 - 20" CRT TV Servicehandleiding - Pagina 27

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Panasonic CT-20SL15 - 20
A
B
8
7
6
5
FROM/TO MICON
AFT
SCL
SDA
SW_AUDIO_L
SW_AUDIO_R
4
FROM/TO SOUND
SW_AUDIO_L
SW_AUDIO_R
TUNER+5V
3
FROM COMB/FILTER/AV
AUDIO_IN1/2[R]
AUDIO_IN1/2[L]
2
AUDIO_IN3[R]
AUDIO_IN3[L]
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
1
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
A
B
G-11
C
D
TUNER/STEREO SCHEMATIC DIAGRAM
TU001
ENG36A29GF
19
18
NC
NC
NC
NC
NC
W909
2.3
2.3
2.3
24
23
22
21
OUT SW
AGC
Switch
Matrix
De-Emph
(L-R)/SAP
75us
Filter
Cancel
SAPout
Offset
Expand
Cancel
Wide Band
Offset
2.3
1
2
3
0
2.3
2.3
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
(MAIN PCB)
20
21
NC NC
NC
NC
NC
R002
18K 1/2W
100uH 0305
NC
2.3
0
5.0
5.0
0
3.7
3.6
2.6
3.7
20
19
18
17
16
15
14
13
GND
Det
VCA
Det
DAC
ZAP
IIC Decoder
St.PLL
Pilot
Input
SAP
L-R Filter
L-R Demod
Cancel
Pilot
Filter
Filter
Filter
L+R Filter
L+R Demod
Stereo
Noise
SAP
Demod
Filter
Filter
fH.2fH Trap Filter
SAP
Wide Band
Spectral
RMS Det
Expand
RMS Det
Det
dbx De-Emph
Wide Band
Spectral
Spectral
Noise
Vcc
4
5
6
7
8
9
10
11
12
2.2
2.2
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
R001
P.CON+B
18K 1/2W
GND
L901
CAUTION
:SINCE THESE PARTS MARKED BY
ARE
CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY
F
G
H
8
7
6
5
4
3
2
PCB070
CME022
1
H
G-12