Scaler - Grundig Davio 20 LCD 51-5732 DVB-T Service Manual

GRUNDIG Service
HDMI-Controller
LVDS
Hauptplatte / Main Board – IDTV MPEG Decoder & CPU
U800A
SN74LVC00APWR
453566R
3
5
CI_DIR 6
CI_DIR
4
U800B
SN74LVC00APWR
8
U800C
SN74LVC00APWR
11
U800D
SN74LVC00APWR
L801
2V5_ASTBY
C804 C805
FB
100N 100N
L802
C811 C812
FB
100N 100N
GND
L800
C826 C827
FB
100N 100N
3V3_ASTBY
L803 C821 C822
10uH
C844 100N 100N
33U16V
GND
L804
C834 C835
FB
100N 100N
L805
1V5_ASTBY
C818 C819
10uH
100N 100N
GND
L806
C820
10uH
C851
100N
33U16V
GND GND
83
84
159
72
71
Audio
MST96885TL
Video
GND
2 CI_IORD
1 FOEB
3V3D_CI
C800
100N
GND
10
GCS0B
9
13
12
GND
2V5D_MIO
C806 C807 C808 C809 C810
100N 100N 100N 100N 100N
GND
2V5D_RAM
C813 C814 C815 C816 C817
100N 100N 100N 100N 100N
3V3D_IO
C828 C829 C830
100N 100N 100N
GND
3V3A_VDAC
C823 C824
100N 100N
GND
1V5D
C836 C837 C838 C839
GND
100N 100N 100N 100N
GND
3V3D_IO
1V5D_VDAC
GND
R838
SCL_MD 100R
SDA_MD
1V5A_PLL
R840
100R
switch on (trigger: S202-13)
≥
LVDS Driver
Microcontroller Port
RGB Driver

Scaler

22P C854
L807
M_CVBS D_CVBS_IN
5.6uH
R844 R845
390R 390R
C859 C860
47P 47P
GND GND
Q803
RXD0B RX_Scart1
RXD0B RX_Scart1
R818
10K
2N7002
3V3_ASTBY
Q802
TXD0B TX_Scart1
TXD0B TX_Scart1
R819
10K
2N7002
3V3_ASTBY
3V3_ASTBY
27MHZ_PWM
GND
R932 100R
ANTPOWER
ANTPOWER
R931 100R
EMI_SW
EMI_SW
TS_SW
TS_SW
R930 100R
Optional
RESET_COFDM
U807
C850
100N
RESET
8 1
VCC A0
7 2
RESET_OUT
WP A1
6 3
SCL A2
5 4
SDA GND
GND
24LC64
·
2 - 21
Chassis LX IDTV (iX)
229
233
241
175
174
191
190
D_CVBS_IN
39
3V3_ASTBY
R806 R807
4K7 4K7
RXD1B
RXD1B
To Analog uControler
TXD1B
TXD1B
GND GND
C831 C832
X800
4P7 4P7
GND 13.5MHz
U804
1 8
X1 X2
C833
L907
100N 2 7
VDD GND GND
10uH
R824
3 6
VIN N.C.
C840
10K
4 5 27MHZ_IN
GND CLK
100N
ICS728MLFT
GND 453918R
U806
4 5
GND IO3
R836 100R
3 6 SCL_MD
IO2 SCL
R832 100R
2 7 SDA_MD
IO1 SDA
1 8
IO0 VCC 3V3D_CI
C848
100N
PCA9536DP GND
GND
3V3D_IO
27
R826
10K
R827
RESET 2
RESET
47R
R830
Q800
BC848B
10k
GND 3V3D_IO
R822
Q804
RESETDVB
C845
BC848B
C846
10k
100N 33U16V
GND
GND
U805
MAX809
453995R