Cofdm Demodulator - Grundig Toronto 32-7830 T Service Manual

GRUNDIG Service
Hauptplatte / Main Board – COFDM Demodulator
5V-IF
C621
R627
R625
100N
560R
4k7
GND
R626
8
4k7
R646
T607 T609
CVBS
BC858B
BC847B
1K
R647
R650
1k5
270R
GND GND GND
R649
DELAY
DELAY
47K C634
10N
5V-IF
C621
R625 R627
100N
390R
3k6
GND
R626
8
NC
R646
T609
CVBS
BC847B
1K
R647
R650
1k8
270R
GND GND
R649
DELAY
DELAY
47K C634
10N
3V3A_DIG_FE
GND
GND
C645
GND
100N
C646 C647
GND
82p
C709 82p
IFD1
L374
1N
C662
1UH
IFD2
GND
1N 5V-IF
3V3A_DIG_FE
C663
R721
R722
4K7
4K7
GND
R723
100N
100R
SDAT
SCLT
R724
100R
FROM MPEGDECODEREMM2LL
5V-IF
L607
68R
S600
CON2X25
26 1
P26 P1
27 2
P27 P2
28 3
P28 P3
29 4
P29 P4
30 5
CVBS
P30 P5
31 6
P31 P6
32 7
P32 P7
33 8
P33 P8
34 9
SIFOUT
P34 P9
35 10
P35 P10
36 11
P36 P11
37 12
P37 P12
38 13
SCL5V
P38 P13
39 14
P39 P14
40 15
P40 P15
41 16
P41 P16
42 17
SDA5V
P42 P17
43 18
P43 P18
44 19
P44 P19
45 20
P45 P20
46 21
MONO
P46 P21
47 22
P47 P22
48 23
P48 P23
49 24
+33V P49 P24
50 25
P50 P25
GND
R629
R628
0R
C627
10k
150pF
L605
R635
C628
1 1 3
3
82pF
120R
R652
814111136000
180R
T610
GND
BC847B
C635
C636
100pF
R636 100pF
R651
120R
180R
R656
CVBS
470R
T611
R657
8
BC848B
470R
GND
GND
R629
R628
NC
C627
2k2
180pF
L605
R635
C628
1 1 3
3
100pF
56R
R652
814111136000
100R
R659
T610
GND
BC847B
2k2
C635
C636
100pF
R636 R661 R660 220pF
R651
330R 33R 330R
15R
R656
CVBS
470R
T611
R657
8
BC848B
470R
GND
GND
GND
C666
C667
X700
33p 33p
20.48MHz
R739
R738
100R
1V2D_DIG_FE
1V2A_DIG_FE 2M2
3V3D_DIG_FE
1V2D_DIG_FE
GNDGND GND
49
AINP_Q
50
AINM_Q
51
AVDD
52
AVSS
53
GUARD_Q
54
DAREFP
55
DAREFM
CXD1968
56
GUARD_I

COFDM Demodulator

57
AINM_I
58
AIN_I
CXD1976
59
AVSS
60
AVDD
61
REFIN
62
REFOUT
63
TUNERDAT
64
TUNERCLK
R725
GND
IFAGC
1K
1V2D_DIG_FE
C664
470N
GND 3V3A_DIG_FE
R726
RESET_COFDM
*
C665
CVBS
+5V_SW GND *
GND
D600
SIFOUT
BAV99
SCL5V
SCL5V
SDA5V
SDA5V
D601
BAV99
MONO
+33V
GND +5V_SW
5V-IF
R658 47R
R648 R600 47R
9
1K5
L600
C601
R601 47R
TV-CVBS
47nF
0R/0805
C638
C637
T608
BC858B
330pF/NC
330pF/NC
R602
C602
47nF
47R
GND GND
Only for PCB index
5V-IF
R658 47R
R600 47R
R648 9
1K
L600
C601
R601 47R
TV-CVBS
0R/0805 47nF
C638
C637
T608
BC858B
330pF/NC
330pF/NC
R602
C602
47nF
47R
GND GND
Only for PCB index < XLB190R-3
R736
GND
10k
3V3D_DIG_FE
GNDGND GND GND
IC703
32
TMS
31
TDI
30
TDO
29
R735
TCLK
28
CVSS
27
CVDD
26 R734
SDA
25 R733
SCL
24
DVDD
23
DVSS
22
TSDATA7
21
TSDATA6
20
TSDATA5
19
TSDATA4
18
TSDATA3
17
TSDATA2
GND
GND
1V2D_DIG_FE
3V3D_DIG_FE
47R
R730
TS_CLK
1 2
TS_VALID
3 4
TS_START
5 6
TS_ERROR
7 8
+3.3V
27
C648
L370
100N
3V3A_DIG_FE
1uH
C649
100N
L371 GND
1uH
C654 C655 C651
100N 100N 100N
+1.2V
GND
L372
1V2A_DIG_FE
C652
FB
100N
GND
L373
C656 C657 C658
FB
100N 100N 100N
GND
2 - 32
Chassis BL (LX prime IDTV)
TUN_CVBS
TUN_CVBS
TUNER-CVBS
TUNER_CVBS
VC OM0
VCOM0
XLB190R-3
< –
9
TUN_CVBS
TUN_CVBS
TUNER-CVBS
TUNER_CVBS
VCOM0
VCOM0
switch on (trigger: S202-13)
≥
•
10k
GND
GND
28
1V2D_DIG_FE
ª
SDA_MD
100R
SDA_COFDM
SCL_MD
100R
SCL_COFDM
3V3D_DIG_FE
28
GND
47R
R732
TS_DATA7
1 2
TS_DATA6
3 4
TS_DATA5
5 6
TS_DATA4
7 8
º
47R
R731
TS_DATA3
1 2
TS_DATA2
3 4
TS_DATA1
5 6
TS_DATA0
7 8
32
31
TS_CLK
30
⁄
TS_VALID
TS_START
29
3V3D_DIG_FE
C650
100N
¤
1V2D_DIG_FE
C659 C660
100N 100N