Skyworth 8M26S, Service Manual

Page: 57 / 57

5 5
4 4
3 3
2 2
1 1
D
D
C
C
B
B
A
A
TUAGC
TAGC
TU_SDA TU_SCL
TUNER_SDA TUNER_SCL
TU_SDA
TU_SCL
IF-IN-
TUAGC
IF-IN+
BPF_OUT-
IF-IN-
IF-IN+
VIFP
VIFM
33V
40V
+5V_Tuner
33V
+5V_Tuner
+5V_Normal
+5V_BACK
+5V_BACK
+12V_Normal
+5V_Normal
TAGC TUNER_SDA TUNER_SCL
VIFM VIFP
Title Size
Document Number
Rev
Date:
Sheet
of
TUNER
V1.0
MST6M181VS
<OrgName>
A4
71
0
Friday, July 01, 2011
Title Size
Document Number
Rev
Date:
Sheet
of
TUNER
V1.0
MST6M181VS
<OrgName>
A4
71
0
Friday, July 01, 2011
Title Size
Document Number
Rev
Date:
Sheet
of
TUNER
V1.0
MST6M181VS
<OrgName>
A4
71
0
Friday, July 01, 2011
BPF_IN
BPF FOR 38.9MHz OR 38MHZ
TUNER AGC,Close TUNER
Q
ؐ˖
15(MIN)
Vout=1.25*(1+560/180)=5.13V
100mA
Add by lin.20110315
L26 NC L26 NC
L32
100nH_10%
L32
100nH_10%
R302 1K R302 1K
C366
51R
C366
51R
C357
0.1u
C357
0.1u
C365
0.1u
C365
0.1u
R291
100R
R291
100R
C362
0R
C362
0R
C243 0.1u C243 0.1u
R307
68R
R307
68R
R311
NC/0
R311
NC/0
R362 100K R362 100K
R308 0R/560_1% R308 0R/560_1%
C369
51R
C369
51R
C245
0.1uF/50V
C245
0.1uF/50V
R519
0R
R519
0R
L116
100uH
L116
100uH
C241 0.1u C241 0.1u
D66 33V D66 33V
C242 0.1u C242 0.1u
R309
NC/180_1%
R309
NC/180_1%
L28
0R
L28
0R
C361
33R
C361
33R
C360
NC
C360
NC
C392 2.2u C392 2.2u
+
CA17
470uF/16V
+
CA17
470uF/16V
R299
68R
R299
68R
C355
33R
C355
33R
C356
0R
C356
0R
ADJ
OUT
IN
U28
AMS1117-25
ADJ
OUT
IN
U28
AMS1117-25 3
2
1
4
C358
0.1u
C358
0.1u
U3
HFT2-8F/115CW
U3
HFT2-8F/115CW
N.C
1
AGC
2
+33V
3
AS
4
SDA
5
SCL
6
+5V
7
BT
8
IF2
9
GND
13
GND
14
GND
15
GND
16
IF1
10
N.C
11
N.C
12
L29
NC
L29
NC
L30
NC
L30
NC
R520
0R
R520
0R
+
CA20 100uF/16V
+
CA20 100uF/16V
+
CA21 220uF/16V
+
CA21 220uF/16V
C363 0.1u C363 0.1u
C237 20p C237 20p
L27
NC
L27
NC
R310
22R
R310
22R
L31
0R
L31
0R
C364 NC C364 NC C367 NC C367 NC
C240 0.1u C240 0.1u
C359
220p
C359
220p
L25
NC
L25
NC
C239 20p C239 20p