Toshiba 20AF43 Panduan Servis - Halaman 27

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Halaman Cetak
Toshiba 20AF43 Panduan Servis
A
B
TUNER/STEREO SCHEMATIC DIAGRAM
8
(MAIN PCB)
7
6
5
FROM/TO MICON
SCL
SDA
J_AUDIO_OUT_L
J_AUDIO_OUT_R
4
FROM/TO SOUND
SW_AUDIO_L
SW_AUDIO_R
3
FROM/TO AV
J_AUDIO_OUT_L
J_AUDIO_OUT_R
AUDIO_IN1/2[R]
AUDIO_IN1/2[L]
AUDIO_IN3[R]
2
AUDIO_IN3[L]
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.
A
B
G-11
C
D
TU001
115-V-K015AR
19
18
NC
NC
NC
NC
NC
NC NC
W812
3.2
C901
2.3
BUFFER
50V
1
KA
Q901
0
KTA1504S_Y_RTK
3.2
C902
2.3
BUFFER
50V
1
KA
Q902
0
KTA1504S_Y_RTK
NC
2.3
2.3
2.3
2.3
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
Offset
2.3
1
2
3
4
5
0
2.3
2.3
2.2
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
CAUTION
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
C
D
E
20
21
NC
NC
NC
L901
100uH 0305
0
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
fH.2fH Trap Filter
Filter
Filter
SAP
Wide Band
Spectral
RMS Det
Expand
RMS Det
Det
dbx De-Emph
Wide Band
Spectral
Spectral
Noise
Vcc
6
7
8
9
10
11
12
2.2
0.4
5.1
2.4
2.4
0.4
2.3
3.4
:SINCE THESE PARTS MARKED BY
ARE
ATTENTION
:LES PIECES REPAREES PAR UN
CRITICAL FOR SAFETY,USE ONES
DANGEREUSES AN POINT DE VUE SECURITE
DESCRIBED IN PARTS LIST ONLY
N'UTILISER QUE CELLS DECRITES
DANS LA NOMENCLATURE DES PIECES
E
F
G
FROM/TO CHROMA
TUNER+5V
TUNER_VIDEO
P.CON+8V[B]
P.CON+5V
FROM/TO POWER
R001
P.CON+B
68K 1/2W
R002
GND
68K 1/2W
FROM/TO MICON
AFT
PCB010
TMC559
ETANT
F
G
H
8
7
6
5
4
3
2
1
H
G-12