Toshiba VTV1402S Service Manual page 49

A B
8
FROM/TO Y/C/A/H.AMP
7
Y/C_VIDEO
FROM/TO MICON
TEXT_RESET
AT+5.6V_A
FROM/TO CHROMA/IF
SYNC
FROM/TO POWER
AT+5.6V
6
P.CON+5V
GND
1.3 1.3 1.3
1 2 3
5
16 15 14
4.8 1.3 1.3
4
FROM/TO CHROMA/IF
GND
TEXT_B
TEXT_G
TEXT_R
TEXT_Y
FROM/TO MICON
3
TUNERON/OFF-A
SDA
SCL
FROM/TO 21PIN I/O
GND
21_Y
21_R
21_G
21_B
2
1
NOTE: THE RESISTOR MARKED F IS FUSE RESISTOR.
THE ALUMI ELECTROLYTIC CAPACITOR MARKED NP
IS NON POLAR ONE.
A B
C
T'TEXT SCHEMATIC DIAGRAM
W801
D854
SB10-03A3
V.REF
4.8
Q863
2SC2412K
2.4
R861
1.8
D855
12K
1SS133
R869
D858
12K
1SS133
R866
D857
22K
R871
1SS133
D860
22K
1.3 1.3 0 0 0
4 5 6 7 8 1SS133
R870
D859
12K
13 12 11 10 9
1.3 1.3 0 0 0 1SS133 R867
12K
16V
D856
D851
1SS133
1SS133
16V
16V
4.8
0.3
0
BLK. BUFFER
Q862
2SC2412K
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
C
D E
(SYSCON PCB)
L854
100uH
L851_1
10uH
4.8
SYNC BUFFER
Q853
2.3
2SC2412K
1.7
1.0
FRAG2
NC
1.0
FRAG1
W845
C861
2.1
REF.
0.01 B
2.1
RED BUFFER
RGB SET
Q855
2SC2412K
0
4.8 0 AGND
R851 1K 4.8
C872
0 0
RED
0
100 KA
GREEN BUFFER
Q852
0
0
C873 2SC2412K R856 GREEN
100 KA 1K
4.8
4.8
AVCC
BLUE BUFFER
0
Q851
R865
C874 0
R880
2SC2412K
0 BLUE
43K
100 KA 1K
R878
0.3
BLANK
R897
B851
6.8K
R877
LFP3A-M3R2TA 4.8
2.2K
SDA
1001/4W
R876
4.8
SCL
100 1/4W
0.3
TEST3
NC
0.1
WIND
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.
D E
F G
5.0
2.5
BUFFER
2.5 Q856
2SC2412K
C857
16V 100 YK W921
DECODER IC
ET106 W850
IC851
1.0
TEST5
R911
3.5
DATA SLICER IC
SYNC
IC852 ET317
150K
0
3.5
VIDEO SCAN-0
W922
4.4
4.8
DVCC SYNC
C895
5.1 0
RSTB DGND
0.1 TF
0 W853 0.1
CLK.IN WIND
0 4.8
DGND DVCC
2.2
0
C865
TEST1 OSC OUT
NC
0.1 MMTV
4.8 0
TEST4 DGND
0 W851 0
TDATA TADATA
0 0
TCLK TCLK
4.4 0
CSB TSTAPLB
4.8
MUTE
NC
0
TEST2
F G
H
8
7
6
5
C896
1.8
TSIG
0.022 B
C868
1.8
SSIG
W929
0.022 B
C869
0.5
CSIG
220P CH
0
AGND
47
X851
2.3
OSC1
13875KHz
2.5 C890
OSC2
4
15P CH
4.8
AVCC
0.5
CREF
0
AGND
R860
1.7
BIAS
1K
3
2
PCB010
VMX193
1
H