5V-Tuner - Grundig Davio 20 LCD 51-5732 DVB-T Service Manual

GRUNDIG Service
Hauptplatte / Main Board – Tuner
5
5V-IF
L330
4.7uH/160mA

5V-Tuner

+
C493
0.1uF
GND
5V-IF
T331
R567
BC807-40
15R
1
R568
15R
T316
R572
BC857B
1K
R569
ANTPOWER
10K
T309
1 Enable
BC847B
0 Disable
GND_T
(1)
TOP TAGC VAGC VPLL
9 ( ) 8 14 (15) 1 6 1 ( ) 7 19 (21)
C AGC(neg)
C BL
TUNER AGC VIF-AGC
2 (31)
VIF2
VIF-PLL
1 (30)
VIF1
SINGLE REFERENCE QSS MIXER
24 (27)
INTERCARRIER MIXER
SIF2
AND AM DEMODULATOR
23 (26)
SIF1
OUTPUT
SUPPLY SIF-AGC
PORTS
C AGC
(6, 12, 13, 14, 17,
19, 25, 28, 29, 32)
13
20 (22) 18 (20) 3 (1)
V P AGND n.c. O P 1
5V-IF
R533
1K
R532
6.8K
C496
IF_TV
10nF R534
2K2
GND
L334
R555
51R
1.0uH/NC
GND
6 7
TU303
THOMSON DTT75407
Hybrid Tuner
GND
GND 5V-Tuner
IC319
L335
2 I2CSDA_5V 14 12
X X0
FB0603 13
X1
15
I2CSCL_5V
Y
C522
1uF 2
Y0
4 1
R740 1K
Z Y1
C523
1nF
5
8
Z0
VSS
3
Z1
GND 16 11
+5V_ST VDD A
GND 7 10
VEE B
6 9
EN C
GND
C495
M74HC4053_TSSOP16
0.1uF
A/D
GND GND
0 Analog
1 Digital
(1) Not connected for TDA9885. REF AFC
1 5 1 ( ) 6 2
RC VCO DIGITAL VCO CONTROL AFC DETECTOR
SOUND CARRIER
TRAPS
4.5 to 6.5 MHz
TDA9885
TDA9886
AUDIO PROCESSING
MAD
NARROW-BAND
2
I C-BUS TRANSCEIVER
FM-PLL DEMODULATOR
11 (10) 10 (9)
22 (24) 7 (5) 12 (11)
O P 2 SCL SDA DGND SIOMAD
5V-IF
R537
22K
R536
T320
1
BC847B
220K
R535
C497
680K
10nF
GND
GND
SAW301
K9656M
1 IN OUT2 5
SAW
2 4
ING OUT1
D318
BA591
GND
SAW302
K3953D
1 5
IN OUT2
SAW
2 4
ING OUT1
A/D
C498
10nF
R561
5.6K
GND
5V-IF
IFD1
IFD2
IFAGC
IF_TV
7
I2C_SDA_5V
SDAT
6
I2C_SCL_5V
SCLT
5
RFAGC
RFMON
R575
+5V_ST
10K
1 2 ( ) 3
GND
(18) 17
3V3_ASTBY
CVBS
+
C623
10uF/16V
(7) 8
AUD
(3) 5
AND SWITCHES
DEEM
GND
(4) 6
AFD
4 (2)
F M P L L
1 2
5V-IF
5V-OUT
+
C502 L331
R539
10uH/160mA 12K
0.1uF
C491
10uF/16V
R540
GND
100K
X302
4MHz
C500 GND
R538
GND
330R
1.5nF
C503
GND
470nF
C501
220nF
CVBS
IC317
TDA9886TS/V3
GND
140mVrms
R559 R560
C499
100R
100R 5V-OUT
10nF R340
C504
1k
470nF
C516
1
GND
C515 10nF
14
R339
390pF
1k
6 5
2 - 
Chassis LX IDTV (iX)
$
TU302
ENV57DD3H6F
Hybrid Tuner
L333
10uH/100mA
R525
1 2 1
0R
+
C492 C494
5V-Tuner
0.1uF
10uF/16V
GND PANASONIC TUNER OPTION
2
I2CSDA_5V
I2CSCL_5V
C513 C514
C512
47pF
47pF 47pF
GND
IC307
+1.2V
NCP1117STAT3 G SOT-223
L372
3 2
VIN VOUT
FB
1 4
ADJ TAB
+
453227R
C619
C625
100N
10uF/16V
L373
GND
GND
FB
C648 3V3A_DIG_FE
L370
100N
1uH
C656 C657
3V3D_DIG_FE
100N 100N
C649
100N
L371 GND
1uH C654 C655 C651 C650
100N 100N 100N 100N
GND
RFAGC
R541
1K
+ C506
47uF/16V
8
C413
R472
SIFM0
0R
0.1uF
C412
R473
R562
SIFP0
NC
0R
C414
0.1uF
R504
MONO
AUMONO
R563
10K
10R
0.1uF
R505 TUNER GND CUTOUT
T323 10K C519
BC847B 100pF
C517 R564
820R GND
NC
GND
GND
1V2A_DIG_FE
C652
100N
GND
1V2D_DIG_FE
C658
C659 C660
100N
100N 100N
GND