Hisense 32LD840FT Service Manual page 41

5
TUNER
D 1
ANT_PWR
2 5V_B1
Vcc1
3 T_RFAGC
RAGC
4
5V_B2
Vcc2
5
R392 R392
Vsync
6
Reset
7 T1_3.3V
Vcc3 100R 100R
8 T1_3.3V
VTS
9 R396 R396 10k/NC 10k/NC
CAS
10
T_SCL
SCL
U1 U1 11
T_SDA
SDA
12
RF AGC
VI4607 VI4607 13
IF
14 T2_1.2V
Vcc4
15
XTO
16 TV_CVBS
CVBS
17
T_IFAGC
IF AGC EXT
18
Audio
19 SIFPOUT
SIF
20
#IF_OUT
#IF_OUT
IF+
21 IF_OUT
IF_OUT
IF-
IF demodulator I2C address is 0x10
C
1
ANT_PWR
2 5V_B1
Vcc1
3
RAGC
4 5V_B2
Vcc2
5
NC5
6
NC6
7
NC7
8
VTS
U2 U2 9
NC9
10
T_SCL
SCL
VI4603/NC VI4603/NC 11
T_SDA
SDA
12 R427 R427 0R/NC 0R/NC
RF AGC
13 IF_TV
IF
14
NC14
15
XTO
16
NC16
17 T_IFAGC
IF AGC EXT
18
NC18
19
NC19
20 #IF_OUT
#IF_OUT
IF+
21 IF_OUT
IF_OUT
IF-
B
U3 U3
W1/NC W1/NC
13
GND
12
GND
1
NC1
2
NC2
3
NC3
4
AS
5
T_SCL
SCL
6
T_SDA
SDA
7 5V_B1
+B_5V
8 IF_TV
AIF_OUT
9
A T_IFAGC
IF_AGC
10
#IF_OUT
DIF_OUT+
11
IF_OUT
DIF_OUT-
15
GND
14
GND
VA1P1BF8402/NC VA1P1BF8402/NC
5
4
R394 R394
R393 R393 10k 10k
Demod_RST 2,8
100R 100R
TV_CVBS C272 100u/16V C272 100u/16V 1 V27 V27
MMBT3904LT1 MMBT3904LT1
8
R399 R399
8
100R/NC 100R/NC R397 0R R397 0R
R400 R400 R401 R401
220R 220R
10k 10k
2,8 SIFPOUT
R404 R404 47R 47R C281 100n/16V C281 100n/16V
2,8
R405 R405 0R 0R C282 100n/16V C282 100n/16V
R369 R369 0R 0R
T_IFAGC 3 2
T-IF-AGC 8
V23 V23
MMBT3906LT1/NC MMBT3906LT1/NC
5V_TUNER
R387 R387
8
100k 100k R389 R389
8
R388 R388 10k 10k 10k 10k
5V_TUNER
T_RFAGC
V25 V25
MMBT3904LT1 MMBT3904LT1
1
V26 V26
MMBT3904LT1 MMBT3904LT1
1
2,8
2,8
SAW Drive-----NC
+12V
R372 R372 300R 300R
R373 R373 300R 300R
C257 C257
C256 C256 R374 R374
6.8k 6.8k
C258 C258
47n/16V 47n/16V 100n/16V 100n/16V
10n/50V 10n/50V
C259 C259 R381 R381
IF_TV
10n/50V/NC 10n/50V/NC 33R 33R
8
8
R385 R385
1k 1k
2,8 靠近tuner放置
2,8
4
3
5VAIN
TUNER POWER
L31 L31
BLM18PG121SN1 BLM18PG121SN1
C267 C267 C268 C268 +12V
100n/16V 100n/16V 10u/16V 10u/16V R370 R370
10R/2W 10R/2W
TV+
R398 R398 47R 47R C273 C273
TV+ 2
47n/16V 47n/16V
R402 R402
75R/NC 75R/NC
TV-SIFP
TV-SIFP 2
TV-SIFM
TV-SIFM 2
RF AGC Switch
T_RFAGC V21靠近tuner RFAGC脚放置
R376 R376 0R 0R
T_IFAGC R377 R377 0R/NC 0R/NC 3 V21 V21 2
MMBT3906LT1/NC MMBT3906LT1/NC
3.3VA
R380 R380
100k 100k
R382 R382 10k 10k
5V_TUNER
R383 R383
10k 10k
R384 R384
V24 V24 1
MMBT3904LT1 MMBT3904LT1
10k 10k
VIF_12V
L28 L28
R375 R375
0.82 uH 0.82 uH 680R 680R
R378 R378
N22 N22
10k 10k R379 R379
C260 10n/50V C260 10n/50V 1
IN1
V22 V22 22R 22R
1
MMBT3904LT1 MMBT3904LT1
R390 R390
2
NC/390R NC/390R
IN2
HS8601/NC HS8601/NC
R386 R386
22R 22R
靠近MSD309放置
3
2
5V_Tuner
N21 N21
R371 R371
1 2
10R/2W 10R/2W
Vin Vout
C250 C250 C251 C251 C252 C252
CW78D05CZ CW78D05CZ
10u/25V 10u/25V 100n/16V 100n/16V 100u/16V 100u/16V
5VAIN
LD1117A-3.3AZ1117H-3.3 LD1117A-3.3AZ1117H-3.3
3
C296 C296
C297 C297
2.2u/10V 2.2u/10V
100n/16V 100n/16V
R406 R406
0R 0R
RF_AGC_T 2
3.3V_TUNER
3
C298 C298
C299 C299
RF_AGC_SEL 2
2.2u/10V 2.2u/10V
100n/16V 100n/16V
R426 R426
0R 0R
5 C261 100n/16V C261 100n/16V VIFM
VIFM 2
OUT2
L29 L29
NC/3.3 uH NC/3.3 uH
4 VIFP
C262 100n/16V C262 100n/16V
VIFP 2
OUT1
close together
Title Title Title
Size Size Size
Date: Date: Date:
2
1
5V_B1
L26 L26
BLM18PG121SN1 BLM18PG121SN1
C247 C247 C248 C248 C249 C249 C266 C266
100u/16V/NC 100u/16V/NC
1n/50V 1n/50V 100n/16V 100n/16V 2.2u/10V 2.2u/10V
靠近tuner放置
5V_B2
L27 L27
BLM18PG121SN1 BLM18PG121SN1
C253 C253 C254 C254 C255 C255 C274 C274
100u/16V/NC 100u/16V/NC
1n/50V 1n/50V 100n/16V 100n/16V 2.2u/10V 2.2u/10V
靠近tuner放置
N23 N23 3.3V_TUNER
4
VIN VOUT
2
C300 C300 C277 C277
VOUT
100n/16V 100n/16V
100u/16V 100u/16V
0R/NC 0R/NC
R403 R403
N24 N24 1.2V_TUNER
AZ1117-1.2 AZ1117-1.2
4
VIN VOUT
2
C295 C295 C301 C301
VOUT
100n/16V 100n/16V
100u/16V 100u/16V
0R/NC 0R/NC
R425 R425
3.3V_TUNER
T1_3.3V
40mA
L30 L30
BLM18PG121SN1 BLM18PG121SN1
C269 C269 C270 C270 C271 C271 C275 C275
100u/16V/NC 100u/16V/NC
1n/50V 1n/50V 100n/16V 100n/16V
2.2u/10V 2.2u/10V
closed to tuner
1.2V_TUNER
T2_1.2V
L32 L32
BLM18PG121SN1 BLM18PG121SN1 280mA
C278 C278 C279 C279 C280 C280 C276 C276
100u/16V/NC 100u/16V/NC
2.2u/10V 2.2u/10V 1n/50V 1n/50V 100n/16V 100n/16V
closed to tuner
MSD329ZX+MSB123X MSD329ZX+MSB123X MSD329ZX+MSB123X
Document Number Document Number Document Number
A3 A3 A3
TUNER TUNER TUNER
Monday, June 20, 2011 Monday, June 20, 2011 Monday, June 20, 2011 Sheet Sheet Sheet 9 9 9 of of of 10 10 10
1
D
C
B
A
Rev Rev Rev
1.0 1.0 1.0