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EN 122
9.
EM1.1A AA
9. Circuit Descriptions, List of Abbreviations, and IC Data Sheets
Index of this chapter:
9.1 Introduction
9.2 Block Diagram
9.3 Power Supply (Diagram A1 and A2)
9.4 Control (Diagram B7)
9.5 Tuner and IF (Diagram A8 and B2)
9.6 Video: HD Jack Interface (Diagram N)
9.7 Video: High-end Input Processor (HIP, Diagram B2)
9.8 Video: Feature Box (Diagram B3)
9.9 Video: High-end Output Processor (HOP) and TOPIC
(diagram B4)
9.10 Synchronization (Diagram B2, B3 & B4)
9.11 Horizontal (Line) Deflection (Diagram A3)
9.12 Vertical (Frame) Deflection (Diagram A4)
9.13 Audio (Diagram B6, B10, and A6)
9.14 CRT Panel / Rotation / Scavem (diagram F)
9.15 Software Related Features
9.16 Abbreviation List
9.17 IC Data Sheets
9.1
Introduction
The EM1.1A is a low end EM5 chassis, with the same LSP, but
with a Painter microprocessor (instead of the OTC).
The EM1.1A architecture consists of a full sized LSP/SSP
combination, a smaller sized SSB (mounted on the SSP via a
SIMM connector).
9.2
Block Diagram
TUNER
IF
F-TYPE
HD
JACK
VIDEO-EXT
EXT
AUDIO-EXT
I/O
MONITOR-OUT (A+V)
TOP
CONTROL
IR
REC.
EHT
180V
141V
28V
ETC.
LOW
5V2
POWER
STBY
MAINS 110V
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
AUDIO-PIP
YUV50
VIF
HA
IF
FILTER
SIF
VA
HIP
COMB
FILTER
CVBS-TEXT
(V)
SIF
AUDIO-EXT
(A) MONITOR-OUT
Figure 9-1 Block diagram
The main functionalities of these boards are:
•
LSP: supply, deflection, and sound amplification.
•
SSP: tuner input, SIMM interface, I/O and interface
provisions for extended functions such as PIP.
•
SSB: core TV functionalities, such as set control, video and
audio decoding, feature box, video featuring, and sync/
geometry control.
The LSP (single sided) is designed very conventionally, with
hardly any surface mounted components on the copper side.
Warning: be aware that the LSP has a very large 'hot' area,
including both deflection coils.
The SSB is a high tech module (four layer, 2 sides reflow
technology, full SMC) with very high component density and
complete shielding for EMC reasons. Despite this, it is
designed so that repair on component level still is possible. To
achieve this, attention was paid to:
•
The position of service test lands: most of them are at the
Tuner side.
•
Accessibility (Tuner side). If there are still problems with
the accessibility, one can order an extension board (12 NC:
9965 000 05769).
•
Clearance around surface mounted ICs (for replacing).
•
Detailed diagnostics and fault finding is possible via
ComPair.
Caution: Always be sure that the set is 'off' when you remove
or replace the SSB panel!
TDA9178
YUV
FRAMEDRIVE+
TOPIC
FRAMEDRIVE-
VDHOP
VD100
E/W
HD100
HOP
H
D
FBL-TEXT
RGB-TEXT
NVM
(PROGR.)
TDA7497
L
MSP
AMPL
L/R
SW
R
NJM4556
HP
HP
VERT
E/W
HORZ
R
CRT
G
+
B
SCAVEM
SCAVEM
COLD
HOT
CL 36532038_116.eps
CRT
020903
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