Durabrand DBTV1300 Service Manual page 18

A B
8
FROM POWER
UNREG+12V
7
6
FROM/TO SOUND/AV
5
R612
AUDIO_OUT
6.8K 1/4W
C642
AUDIO_IN
50V 1 KA
GND
5
R632
220
W817
FROM/TO MICON/TUNER
4
Y_VIDEO
AT+5V
SYNC
TUNER+5V
RESET
AFT
AGC
W834
IF
3
GND
HD
POWER
OSD_B
OSD_BLK
2 OSD_G
VD
OSD_R
I2C_OFF
SDA
SCL
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
1
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
A B
G-3
C
CHROMA SCHEMATIC DIAGRAM
6
7
CF604
8.8
REG
5.5 EFCT4R5MW5
Q603
2SD734
4.9
R615
CF603
EFCT4R5YS5A
470
R608
1.8K
3.0 2.2 0 0 7.9 0 0
48 47 46 45 44 43 42 41
R634
R611 10K
10K 2.3
AUDIO OUT
2.4
C604
AUDIO BYPASS
2.2
50V 1 KA
D608 MTZJ12B
EXT AUDIO IN
3.0
C623 0.0033 M
FM DIRECT OUT
46 SW REG CONT
2.9
C632 50V 2.2 KA
47 LIMITER IN
VIF VCO F/B
R618 10M 1/4W 48 IF AGC
3.2
49 QIF OUT
VREG Vcc
8.7
VIF APC FILTER
3.2
VIF VIDEO OUT
2.2
VIF GND
0
C621 0.01 Y
0
AFT OUT
1.9
C626 64 VIF IN (1)
QIF IN
1 VIF IN (2)
0.001 Y
2.8
R606
RF AGC OUT
10K
4.6
C606
RF AGC FILTER
SAW FILTER
50V 0.22 KA 2.9
CF601
SAF45MFY220ZR
1.5
OUTOUT G IN IN
1 2 3 4 5 6 7 8
5 4 3 2 1
1.5 4.9 4.9 0 4.9 0 0
L601
1.2uH
C609
0.01 Y
8
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
REG
Q605
Q604
2SD734
2SD734
7.2 4.9
4.9 7.2
REG
5.5 5.5 Q606
2SD734
7.9 11.3
8.5
R639
100
R638 22K
C661 0.01 Y
5.7 0 5.6 0 0 2.5 3.2 1.9 8.5
40 39 38 37 36 35 34 33
C638
50V 4.7 NA
3.3
R642 D605
ACL/ABCL
2.6 22K 11E1-EIC
R IN
0
V PULSE OUT
4.7
G IN
34 EXT C in
0
33 8.7V REG OUT
FAST BLK
32 X'TAL
C645
0
SPOT KILLER NC
16V 47
7.0
KA
CHROMA IC fsc OUT NC
2.8
IC601
M61203CFP
4.9
VIDEO CHROMA Vcc
4.9
C613
V RAMP CAP
R641 1 TF
4.7
V RAMP FEEDBACK
22K +-1%
2.8
17 V OUT
B IN
16 B OUT
0
STRAT UP Vcc
7.9
10
7.9
3.6
9 10 11 12 13 14 15 16
0 0 4.9 3.4 3.9 4.9 2.0 2.0 2.0
9
R627 100
R630 100
R631 100
R617 1K
W829
CAUTION: SINCE THESE PARTS MARKED BY ARE
ATTENTION:
CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY
D E
F G
D606
C647
MTZJ6.8B
50V 1 KA
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
7
FROM SOUND/AV
VIDEO_IN
6
5
4
FROM/TO DEFLECTION/CRT
V_OUT
ABCL
V_FEEDBACK
GND
H_OUT
H_SYNC
3
B.OUT
G.OUT
R.OUT
CLAMP
TEST POINT
CP601
173979-6
B.OUT 6
INT.MONI 5
IIC_OFF 4
SDA 3
SCL 2 2
GND 1
DEFLECTION SIGNAL
AUDIO SIGNAL
LUMINANCE SIGNAL
TUNER VIDEO SIGNAL
R.SIGNAL
1
G.SIGNAL
PCB010
B.SIGNAL
TMX464
H
G-4