Philips EM5E AA Service Manual page 105

9.2 Block Diagram
UV13XX SAW
IF
TUNER IF
FILTER
EXT
VIDEO
I/O
AUDIO
TOP
CNTRL
KEYBRD
IR
RECEIVER
5V2 STANDBY
SUPPLY
VBAT (141V)
VSOUND (+/-16V)
EHT
180V
VTUN
+11V
+8V
+5V
POWER
ON/OFF
MAINS
The Tuner (item 1200) is a PLL tuner and delivers the IF-signal,
via audio & video SAW-filters, to the HIP (High-end Input
Processor). The HIP has the following functions:
• IF modulation.
• Video source- and record select.
• Colour decoder.
• Synchronisation.
Three SCART-connectors can be used:
• SCART1 is fully equipped,
• SCART2 is meant for VCR. Pin 10 is used for Easylink and
there is a possibility for Y/C in. The CVBS-out on pin 19 is
meant for WYSIWYR (What You See Is What You Record).
• SCART3 is a RGB/CVBS and audio L/R input.
The HIP delivers YUV and sync signals to the PICNIC. This IC
takes care of:
• Analogue to Digital conversion and vice versa.
• 50 to 100 Hz conversion.
• Panorama mode.
• Noise reduction.
• 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.
Circuit Descriptions and Abbreviation List
TDA932X SAA4978
YUV
VIF YUV
HIP PICNIC
H
H /V
A A
*
FM
1
SAA4992
FM
FALCONIC
FM
FM FM
2 3
SAA5801
CVBS-TXT
OTC
( P)
HFB
RGB-TXT
MSP34XX
SIF L/R
MSP
AM
HP
Figure 9-1 Block Diagram
TDA9178 TDA933X
* *
OUT
TOPIC HOP
/V
D100 D100
YUV_EAGLE
T8F24EF
OUT
EAGLE
5
4
RGB
V
SYNC
NVM
(PROGRAM) TILT
FLASH
RAM (EPG)
DRAM
(TXT)
*
DASHED ITEMS
FLASH
ARE ONLY PRESENT
RAM (SW)
IN SETS WITHOUT "EAGLE"
TDA7490
L/R
TDA7490
SW/C
NJM4556
HP
After the PICNIC the, now 100 Hz, 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 TXT/OSD (from the P) 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, and
a drive-signal for rotation.
Both deflection circuits are 'hot' and located on the LSP. They
are driven by the HOP. 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-, focus- and Vg2-voltages.
The RGB amplifiers on the CRT-panel are supplied with 200 V
from the LOT.
The Auto-SCAVEM circuit modulates transitions of the
Luminance (Y) signal on the horizontal deflection current,
giving a sharper picture.
The sound part is built around the MSP34xx (Multi-channel
Sound Processor) for IF sound detection, sound control and
source selection. Dolby decoding is also done by the MSP.
EM5E
FRAMEDRIVE+
VERT
FRAMEDRIVE-
V
SYNC
E/W
E/W
H
D
HORZ
HFB
SCAVEM
R
AUTO
SCAVEM G
CRT
B
ROTATION
9. EN 105
COLD HOT
CL 26532041_061.eps
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