Toshiba 20A42 Manuale di servizio - Pagina 21

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Toshiba 20A42 Manuale di servizio
A
B
8
FROM POWER
UNREG+12V
GND
7
6
TO SOUND
STEREO+5V
C620
TU_AUDIO_OUT
50V
4.7
YK
GND
C655
0.0068 B
5
CF604
TPSRA4M50C00-A0
R609
180
50V
FROM/TO MICON/TUNER
4
STEREO+5V
RESET
Y_VIDEO
SAW FILTER
AT+5V
TUNER+5V
IN
AGC
1
IF
AFT
PROTECT
W831
3
GND
HD
POWER
OSD_B
OSD_BLK
OSD_G
2
VD
OSD_R
SYNC
I2C_OFF
SDA
SCL
FSC
CLOCK_CONT
CAUTION: DIGITAL TRANSISTOR
1
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
A
B
C

CHROMA SCHEMATIC DIAGRAM

R629
12
2W
REG
REG
Q604
Q605
KTC3203_Y
KTC3203_Y
REG
7.2
0
Q606
KTC3203_Y
RED
4.9
7.2
Q608
KTC3203_Y
5.5
5.5
11.3
7.9
8.5
0
7.2
5.5
R643
10M
CF603
SFSRA4M50CF00-A0
NC
NC
1.59 8.66
0
0.51
8.03
48
47
46
45
44
5.75
2.26
C641
100P CH
QIF OUT
R611
10K
2.32
AUDIO OUT
C604
50V
1
KA
2.3
AUDIO BYPASS
C623
100P CH
3.158
47 8.7V REG OUT
EXT AUDIO IN
48 LIMITER IN
49 P.Con5.7V REG
3.07
FM DIRECT OUT
3.2
VIF VCO F/B
C632
0
VIF GND
50V
0.1
YK
0
VIF GND
R615
R644
2.28
VIF VIDEO OUT
C602
0.01 B
470
47
R606
4.7
RF AGC OUT
10K
C605
2.25
64 VIF IN (2)
VIF APC FILTER
1 V RAMP CAP
0.47
KA
C606
0.01 B
2.59
IF AGC FILTER2
2 AFT OUT
C628
50V
0.1
KA
2.59
IF AGC FILTER1
C634
1.53
VIF IN (1)
0.01 B
1.53
CF601
S803X
TSF5229P3
1
2
3
4
5
GNDOUTOUT
C613
4.91 2.21 4.94
3.84 2.11 3.53 0
2
3
4
63V
1
MKT
W817
10
S803Y
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)
REG
Q603
6
KTC3203_Y
8.8
4.9
5.5
7
R646
27K
C638
3.17
8.76
2.59
5.6
5.6
1.96
2.84
0
0
3.25
2.89
43
42
41
40
39
38
37
36
35
34
33
16V
10
KANP
R642
D605
5.67
Y SW OUT
6.8K
11E1-EIC
2.77
MCU RESET
5
fsc OUT 1
2.6
34 X'TAL
POWER ON CONT
33 ACL/ABCL
5.02
32 AT5.7V REG OUT
SCL
4.92
SDA
4.92
CLOCK CONT
CHROMA IC
IC601
4.74
M61250FP
FAST BLK
0
R IN
2.88
G IN
2.86
B IN
17 H VCO F/B
2.93
VD
16 B OUT
V PULSE OUT
4.88
INV FBP OUT
4.06
SYNC
INTELLIGENT MONI
0.84
3.69
6
7
8
9
10
11
12
13
14
15
16
0
0
0.72 2.3
8.03
0.027 2.0
2.0
2.0
C639
W848
NC
0.01 B
R627_1
100 1/4W
R630_1
100 1/4W
R631_1
100 1/4W
R617
220 1/4W
CAUTION:
SINCE THESE PARTS MARKED BY
CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY
D
E
F
G
C652
50V
10
KA
C647
50V
1
YK
C609
0.01 B
C636
220P B
R621
10K
CLOCK_CONT
SWITCHING
Q607
7.97
KRA102SRTK
SWITCHING
7.95
7.92
0.02
0
0
8
9
R613
56 1/4W
ARE
ATTENTION:
LES PIECES REPAREES PAR UN
ETANT
DANGEREUSES AN POINT DE VUE SECURITE
N'UTILISER QUE CELLS DECRITES
DANS LA NOMENCLATURE DES PIECES
F
G
H
8
TO AV
7
TU_VIDEO
GND
FROM/TO COMB/FILTER
Y_IN
C_IN
STEREO+5V
6
FSC
GND
FROM SOUND
AUDIO_OUT_L
AUDIO_OUT_R
5
Q609
KTC3198
FROM/TO DEFLECTION/CRT
V_OUT
ABCL
4
V_FEEDBACK
GND
H_OUT
H_SYNC
B.OUT
G.OUT
R.OUT
CLAMP
3
TEST POINT
CP601
173979-7
2
AUDIO_OUT_R
7
AUDIO_OUT_L
6
INT.MONI
5
IIC_OFF
4
SDA
3
SCL
2
GND
1
PCB010
TMB540
R.SIGNAL
G.SIGNAL
1
B.SIGNAL
DEFLECTION SIGNAL
TUNER VIDEO SIGNAL
H