Toshiba 14AF45C, 20AF45C Servicehandleiding - Pagina 33
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A
B
8
7
6
5
FROM/TO MICON
AFT
SCL
SDA
J_AUDIO_OUT_L
J_AUDIO_OUT_R
4
TO SOUND
SW_AUDIO_L
SW_AUDIO_R
3
FROM/TO COMB FILTER/AV
AUDIO_IN1/1[R]
AUDIO_IN1/1[L]
AUDIO_IN2[R]
2
AUDIO_IN2[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
(MAIN PCB)
TU001
115-V-KA35ARB
19
18
NC
NC
NC
NC
NC
NC
NC
NC
W812
W832
W833
NC
2.3
2.3
2.3
2.3
0
5.0
5.0
24
23
22
21
20
19
18
GND
OUT SW
DAC
ZAP
IIC Decoder
AGC
Switch
L-R Filter
L-R Demod
Matrix
De-Emph
(L-R)/SAP
75us
L+R Filter
L+R Demod
Filter
Cancel
SAPout
Offset
fH.2fH Trap Filter
Expand
Cancel
Wide Band
RMS Det
Offset
dbx De-Emph
Wide Band
2.3
Vcc
1
2
3
4
5
6
7
0
2.3
2.3
2.2
2.2
0.4
5.1
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
S803X
21
NC
NC
R001
68K
1/2W
R002
68K
1/2W
L901
100uH 0305
0
3.7
3.6
2.6
3.7
17
16
15
14
13
Det
VCA
Det
St.PLL
Pilot
Input
SAP
Cancel
Pilot
Filter
Filter
Filter
Stereo
Noise
SAP
Demod
Filter
Filter
SAP
Wide Band
Spectral
Expand
RMS Det
Det
Spectral
Spectral
Noise
8
9
10
11
12
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
H
FROM/TO CHROMA
TUNER+5V
TUNER_VIDEO
P.CON+5V
FROM POWER
P.CON+B
GND
PCB010
CME017
CAUTION
:SINCE THESE PARTS MARKED BY
ARE
CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY
G
H
20AF45/20AF45C
8
7
6
5
4
3
2
1
G-12