Tuner/Stereo - Toshiba 14AF46 Service Manual

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 COMB FILTER/AV
AUDIO_IN1/1[R]
AUDIO_IN1/1[L]
2 AUDIO_IN2[R]
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
TU001 115-V-KA35ARB
19
18
NC NC NC NC NC
W812
W832
W833
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 4
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
S803X
21
NC NC NC
L901
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
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
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
68K 1/2W
GND
R002
68K 1/2W
CAUTION
:SINCE THESE PARTS MARKED BY ARE
CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY
F G
14AF46/14AF46C
H
8
7
6
5
4
3
2
PCB010
CME017
1
H
G-12