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EN 118
9.
EM5A NTSC
9.2
Block Diagram
PIP/DW MODULE
TUNER
PIP/DW
UV13XX
IF
TUNER
F-TYPE
EXT
I/O
HD
JACK
TOP
CNTRL
KEYBRD
IR
RECEIVER
SUPPLY
VBAT (141V)
VSOUND (+/-16V)
EHT
180V
VTUN
+11V
+8V
+5V
LOW
POWER
+5V2 STANDBY
STBY
POWER
ON/OFF
MAINS 110V
The Tuner/splitter (item 1200) is a PLL tuner and delivers the
IF-signal, via audio and video SAW-filters, to the HIP (High-end
Input Processor.) The HIP has the following functions:
•
IF modulation.
•
Video source select and record select.
•
Color decoder.
•
Synchronization.
Seven video input/output connections (with audio connections)
are available:
1. Front: interfaces CVBS, SVSH.
2. AV1: interfaces CVBS, RGB- and YUV-input (1fH)
3. AV2: interfaces CVBS and Y/C (meant for VCR-
connection.)
4. AV3+AV4: interfaces YPbPr/RGB (HD) inputs (2fH.)
5. Monitor out: interfaces CVBS out.
6. Audio out: interfaces external front and surround speakers.
The HIP delivers YUV and sync signals to the PICNIC. This IC
takes care of:
•
Analog to Digital conversion and vice versa.
•
60Hz interlaced to 60Hz progressive scan conversion.
•
Panorama mode.
•
Noise reduction.
Circuit Descriptions and Abbreviation List
VIF
YUV
IF
DW
BOCMA
SIF
FILTER
PROC.
YUV50
SAW
TDA932X
SAA4978
VIF
YUV
IF
HIP
PICNIC
FILTER
H
/V
COMB
A
A
FILTER
FM
1
VIDEO
AUDIO
SAA4992
FALCONIC
FM
FM
2
3
SAA5801
CVBS-TXT
OTC
(µP)
MSP34XX
SIF
MSP
AUDIO-PIP
Figure 9-1 Block diagram
FBL
TDA9178
TDA933X
*
*
YUV
OUT
TOPIC
HOP
H
/V
D100
D100
*
YUV_EAGLE
T8F24EF
OUT
FM
EAGLE
5
FM
4
V
SYNC
HFB
RGB-TXT
NVM
(PROGRAM)
FLASH
RAM (EPG)
DRAM
(TXT)
*
FLASH
RAM (SW)
TDA7490
L/R
L/R
TDA7490
SW/C
NJM4556
HP
HP
•
Dynamic contrast.
The '2fH features'-block in the diagram gives several options:
•
For Digital Scan, the PICNIC is required.
•
For Natural Motion, the FALCONIC is required.
•
For Pixel Plus, the EAGLE is required.
After the PICNIC, the YUV-signals are fed to the FALCONIC for
'Natural Motion,' followed by the Eagle for 'Pixel Plus'
enhancement (if present.) The processed YUV signals (from
Eagle or PICNIC) are, together with the sync-signals from the
PICNIC, then fed to the HOP (High-end Output Processor.)
This IC handles the video control and geometry part. The RGB-
signals for CC/OSD (from the µP) are also inserted via the
HOP. The video part delivers the RGB signals to the CRT-
panel and the geometry part delivers the H-drive, V-drive, E/W-
drive, and TILT-drive signals.
Both deflection circuits are 'hot' and located on the LSP. The
HOP drives them. To make a galvanic separation, the Line
Drive is driven via transformer 5410 and the Frame Drive via
transformer 5621.The horizontal output stage generates some
supply voltages and the EHT voltage, focus voltage and Vg2
voltage.
FRAMEDRIVE+
VERT
FRAMEDRIVE-
V
SYNC
E/W
E/W
H
D
HORZ
HFB
SCAVEM
R
RGB
AUTO
SCAVEM
G
CRT
B
TILT
ROTATION
DASHED ITEMS
ARE ONLY PRESENT
IN SETS WITHOUT "EAGLE"
COLD HOT
CL 26532058_018.eps
050602
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