Cofdm - Grundig Vision 7 Service Manual

GRUNDIG Service
Chassis - COFDM
Vorabversion
Preliminary Version
3V3A_COFDM
C620
IF_D+
1nF/50V
C624
IF_D-
1nF/50V
3V3A_COFDM
C630
100nF
5V_IF
C632
R626
R625
100nF/50V
4.7k/603
4.7k/603
SDA_COFDM R669 100R
SCL_COFDM
R670 100R
1V2_SW
1V2D_COFDM
33pF/50V
C603
100nF
C607
100nF
U600
49
AINP_Q
50
AINM_Q
51
AVDD-0
C615
52
AVSS-0
100nF
53
GUARD_Q
54
C616
DAREFP
100nF
55
DAREFM
C618
NC(82pF/50V)
56
GUARD_I
57
AINM_I
L605
NC(680nH)
58
AIN_I
59
AVSS-1
C626 60
AVDD-1
NC(82pF/50V)
61
REFIN
62
REFOUT
C662
63
TUNERDAT
100nF
64
TUNERCLK
R668 2.2k
SCCVBS_MUTE
R631 1k/603
IF_AGC
C634
C635
100nF
470nF/10V
1V2D_COFDM
7 8
CXD1968AR
Zero IF, Low IF
or High IF Input
AINP_I
A/D
10-bit
AINM_I
IF to Baseband Conversion
DC Offset Correction
I/Q Phase Offset Correction
AINP_Q
A/D
10-bit
AINM_Q
Power
10/12-bit
IFAGC_I
IF AGC Estimation
(AGC)
PWM
ZIF Enable
Power
10/12-bit
IF AGC Estimation
RF_IFAGC_Q
PWM (AGC)
10-bit RF
AGC PWM &
GPO
Quiet I 2 C
TUNERDAT
Configuration
2
I C Interface
and Debug/
and
TUNERCLK
Monitor
Quiet I 2 C
Registers
3V3D_COFDM
3V3D_COFDM
1V2D_COFDM
C600 C601
33pF/50V
Y600
C604 C605 C606
20.48MHz
100nF
100nF 100nF
R601
R602
2.2Meg
10k
CVSS-2
CVDD-2
CXD1968
DVDD-1
DVSS-1
TSDATA7
TSDATA6
TSDATA5
TSDATA4
TSDATA3
TSDATA2
C633
100nF
1V2D_COFDM
R660
R661
R662
R633 33R
C636
100nF
3V3D_COFDM
Time, Frequency and Symbol
Synchronization
Timing Carrier FFT Window
Offset Offset Position
ACI & CCI
Symbol Pilot
Rejection &
2K/8K FFT
Resampling Processing
Digital AGC
Auto
Impulse
Recovery
Noise
Acquisition
Canceller
Controller
Forward Error
Correction ("FEC")
BER
CXD1968AR COFDM Demodulator
Viterbi Decoder,
Measurement
Byte Deinterleaver,
Data
RS Decoder,
Energy Dispersal
ADC & Logic Clocks
Transport
OSC, PLL &
Clock & Test, Stream
Clock
JTAG Smoothing
Generator
Buffer
20.48MHz Crystal
or 4 to 20MHz Tuner
Crystal Reference Input
2 - 
3V3_SW
3V3A_COFDM
L601
1uH/805
C602
1uF/10V
3V3D_COFDM
L602
1uH/805 C608
1uF/10V
1V2_SW
1V2D_COFDM
L604
600R Bead 0603
C613
1uF/10V
32
TMS
31
TDI
30
TDO
R611 10k
29
TCLK
4
28
27
1V2D_COFDM
R615 100R
C619
26
SDA_EMMA
SDA
100nF
R616 100R
25
SCL_EMMA
SCL
24
3V3D_COFDM
3
C621
23
100nF
22
7
21
1 2
TS_COFDM_D7
20 3 4
TS_COFDM_D6
5 6
TS_COFDM_D5
19 7 8
TS_COFDM_D4
RN600
18 A33R
17
RN601
A33R
1 2
TS_COFDM_D3
3 4
TS_COFDM_D2
5 6
TS_COFDM_D1
7 8
TS_COFDM_D0
33R
TS_COFDM_VLD
33R
TS_COFDM_STRT
33R
TS_COFDM_ERR
TS_COFDM_CLK
8 9 10
C660
NC(10pF)
0
TPS Cell Decode & Frame
Synchronization
Device Configuration
Symbol
Channel
deinterleave,
Estimation &
Demapper,
Correction
Bit deinterleavel
Hi Priority/
Lo Priority
Stream Select
TSDATA[7:0]
TSVALID
MPEG2-TS
Interfaces
TSCLK
(Parallel &
TSSYNC
Serial)
TSERR
Chassis SG