Toshiba 20A46C Service Manual - Page 22
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A
B
0
0
0
0
1
2
3
4
8
8
7
6
5
4.9
0
4.8
4.8
C115
100P
CH
7
C118
C114
6.3V
100
KA
100P
CH
AT+5V
1 CNVSS
41 NC
SDA
2 XIN
42 HVCO F/B
SCL
3 XOUT
43 AFC FILTER
4 TEST1
44 DEF GND
6
5 VSS
45 FBP IN
VOLUME
6 MCU VCC
46 H OUT
7 TEST0
47 DEF VCC
AFT
8 FILT
48 NC
R131
9 HLT
49 HI VCC
KEY1
2.2K
R113
10 VHOLD
50 R OUT
11 CVIN
51 G OUT
KEY2
2.2K
R123
12 RESET IN
52 B OUT
POWER_ON
2.2K
13 MCU RESET OUT
53 ACL
R115
14 Y SW OUT
54 NC
22K
REMOCON
15 V/C GND
55 PROTECT
16 3.58 XTAL
56 SDA
AV2
5
17 C-APC
57 H_CTL
AV1
18 MCU5.7V REG OUT
58 SCL
C121
19 NC
59 NC
AUDIO_MUTE
50V
10
20 CVBS IN3
60 NC
21 AUDIO IN3
61 NC
X-RAY
R125
22 V/C VCC
62 DEGAUSS_H
R127
IIC_OFF
47K
23 MCU TEST
63 STANDBY_H
W825
EO_LEAK
24 CVBS IN2
64 VOLUME
ONTIMFR
25 AUDIO IN2
65 NC
26 CVBS IN1
66 AFT
27 AUDIO IN1
67 KEY1
POWER_FAIL
28 5.7V REG OUT
68 KEY2
29 C(Y/C) IN
69 POWER_ON
R129
47K
4
30 Y(Y/C) IN
70 REMOCON
31 VREG VCC
71 AV2
32 FSC OUT
72 AV1
33 MONITOR OUT
73 AUDIO_MUTE
34 AUDIO ATT OUT
74 X-RAY
35 AUDIO ATT FILTER
75 IIC_OFF
36 NC
76 ON_TIMER
AT+5V
37 V RAMP F/B
77 SYNC
38 V RAMP OUT
78 POWER FAIL
39 V RAMP CAP
79 X-RAY_TEST
40 8.7V REG OUT
80 EXT_MUTE
3
4.1
0
ONTIMFR
SWITCHING
4.9
Q105
KRA102SRTK
R143
R107
100 1/4W
120
2
1
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
A
B
G-1
C
MICON/CHROMA/TUNER SCHEMATIC DIAGRAM
S813X
0
SW
Q604
2SC3052
0
5.0
R618
8.2K
R124
R110
22K
1/4W
10K
R109
10K 1/4W
R130
NC
4.7K
0
0
0
0
0
0
4.8
0
4.8
0
5.1
2.8
5.1
64
63
62
61
60
59
58
57
56
55
54
53
52
0
4.8
MCU GND
4.9
IIC BUS
PGB OUTPUT Stage
DECODER
DRIVE
4.9
CUT-OFF
SDA/SCL
ROM
HV BLK
OSD
RAM
4.9
4.9
I/O
4.9
4.9
P-ON CONT
Power Manage.
4.9
IIC
MCU RESET
TIM
1.8
CCD
INT
4.9
PWM
1K
CLK CONT
0
MCU
AD
CPU core
CLK
0
NC
4.9
VCO
0
XO
4.8
NC
MICON/CHROMA IC
1
2
3
4
5
6
7
8
9
10
11
12
13
IC101
0
0
5.0 4.9
0
4.9
0
3.1
0
0.2
2.8
4.9
4.9
OEC7116B
W845
C102
0.01 B
R128
560
R101
R126
2.7K
560 1/4W
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)
R621
6
5
220
H.CTL
5.6
Q607
KTC3198
3
2
C632
10V
470
YK
C629
0.01
B
5
6
7
NC
NC
4.9
5.0
7.9
0
7.9
6.7
9.0
0
3.5
3.7
0
51
50
49
48
47
46
45
44
43
42
41
8.8
4.7
4
D605
Ver.Proc.
3.7
Hor.Proc.
MTZJ12B
V_OUT
Ver SYNC SEP
SYNC SEPA/Hor.VCO
Ver.COUNT DOWN
Hor.COUNT DOWN
R606
2.2
V RAMP
V_FEEDBACK
AFC-1/H COINCIDENT
AFC-2 H PHASE
27K
1/4W
0
2.8
3.5
RGB Proc.2
RGB Proc.1
OSD SW
5.1
RGB MATRIX
CONTRAST
NC
BRIGHTNESS
COLOR CONT
3.0
W832
FSC
8.9
Chroma Proc.
Vldeo Proc.
P.CON+5V
ACC/C-BPF
2.4
C-TRAP/YDELAY
APC/KILLER
SHARPNESS
TUNER+5V
TINT/DEMO
2.4
BLACK STRETCH
Y MUTE
5.7
R604
LPF
6bB AMP
100
ATT
2.3
2.0
FRONT_V_IN
VCXO
2.3
14
15
16
17
18
19
20
21
22
23
24
2.5
0
3.3
2.9
5.5
0
1.9
2.3
5.1
0
1.9
NC
REAR_V_IN
C609
0.01
B
C610
6.3V
47
KA
C615
TU_VIDEO
1
F
5.5
R603
4.9
8.8
120
1/2W
5V REG
Q601
KTC3203_Y
12.1
9.0
P.CON+9V SW
Q609
9.6
KTC3209_Y
ATTENTION
:LES PIECES REPAREES PAR UN
DANGEREUSES AN POINT DE VUE SECURITE
N'UTILISER QUE CELLS DECRITES
DANS LA NOMENCLATURE DES PIECES
D
E
F
G
ACCESSORY
TM101
RC-EH030
R608
1/4W
220
C623
16V
47
YK
7.9
R607
8.5
8V REG
Q606
100
11.3
KTC3203_Y
C635
0.01
F
C636
0.01
F
C621
C620
16V
47
YK
0.01 B
D603
D604
R605
1SS133
MTZJ8.2B
180 1/2W
4.9
TU001
5.5
115-V-KA35ARB
5V REG
7.2
R629
C001
W815
Q602
C617
KTC3209_Y
0.022 B
47 2W
NC
1
NC
7.2
10V
100
YK
C002
5.5
R635
2
NC
NC
4.9
16V
470
YK
5V REG
47 2W
Q603
TUNER+5V
3
KTC3203_Y
NC
4
NC
NC
5
NC
NC
6
NC
NC
7
NC
NC
8
NC
NC
9
NC
SCL
10
100
SDA
11
AFT
12
TU_AUDIO
13
NC
C007
14
SIF
0.1 B
R001
B+
15
15K 1/2W
15K 1/2W
NC
16
NC
R612
TU_VIDEO
17
470
1/4W
ETANT
CAUTION
:SINCE THESE PARTS MARKED BY
CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY
F
G
H
UM-4
BT001
8
MNAAA(R03)
UM-4
BT002
MNAAA(R03)
FROM/TO DEFLECTION/CRT
7
CLAMP
V_OUT
GND
V_FEEDBACK
ABCL
H_OUT
X-RAY
R.OUT
G.OUT
B.OUT
H_SYNC
6
FROM/TO POWER
UNREG+12V
POWER_FAIL
UNREG+12V
DEGAUSS_H
TU+BT
GND
EO_LEAK
FROM AV
5
REAR_V_IN
FRONT_V_IN
GND
FROM/TO SOUND
P.CON+9V
AV2
AV1
FSC
4
TUNER+5V
P.CON+5V
VOLUME
SCL
SDA
GND
AUDIO_MUTE
TEST POINT
3
CP601 A2001WR2-7P
NC
NC
7
NC
6
R004
NC
SCL
GND
5
IIC_OFF
R003
IIC_OFF
4
SDA
SDA
SDA
3
100
SCL
AFT
SCL
2
GND
1
S808Y
R002
TU+BT
2
TU_VIDEO
PCB010
CME026
1
ARE
H
G-2