Hyundai HPT-4205, Руководство по обслуживанию

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Plasma TV Service Manual 14/03/2005
12.2. TCET1102G
12.2.1. Description
The TCET110/ TCET2100/ TCET4100 consists of a phototransistor optically coupled to a gallium
arsenide infrared-emitting diode in a 4-lead up to 16-lead plastic dual inline package. The elements are
mounted on one lead frame using a
coplanar technique
, providing a fixed distance between input and
output for highest safety requirements.
12.2.2. Applications
Circuits for safe protective separation against electrical shock according to safety class II (reinforced
isolation):
For appl. class I
– IV at mains voltage 300 V
For appl. class I – III at mains voltage 600 V
According to VDE 0884, table 2, suitable for:
Switch-mode power supplies, line receiver, computer
peripheral interface, microprocessor system interface.
12.2.3. 13.12.3.Features
VDE 0884 related features:
Rated impulse voltage (transient overvoltage) V
IOTM
= 8 kV peak
Isolation test voltage (partial discharge test voltage) V
pd
= 1.6 kV
Rated isolation voltage (RMS includes DC) V
IOWM
= 600 V
RMS
(848 V peak)
Rated recurring peak voltage (repetitive) V
IORM
= 600 V
RMS
General features:
CTR offered in 9 groups
Isolation materials according to UL94-VO
Pollution degree 2 (DIN/VDE 0110 / resp. IEC 664)
Climatic classification 55/100/21 (IEC 68 part 1)
Special construction: Therefore, extra low coupling capacity of typical 0.2pF, high
C
ommon
M
ode
R
ejection
Low temperature coefficient of CTR
G = Leadform 10.16 mm; provides creepage distance > 8 mm, for TCET2100/ TCET4100 optional;
suffix letter
‘ G ’ is not marked on the optocoupler
Coupling System U
12.3. TDA9886
12.3.1. General Description
The TDA9886 is an alignment-free single standard (without positive modulation) vision and sound IF signal
PLL.
12.3.2. Features
•
5 V supply voltage
•
Gain controlled wide-band Vision Intermediate Frequency (VIF) amplifier (AC-coupled)
•
Multistandard true synchronous demodulation with active carrier regeneration (very linear demodulation,
good intermodulation figures, reduced harmonics, excellent pulse response)
•
Gated phase detector for L/L accent standard
•
Fully integrated VIF Voltage Controlled Oscillator (VCO), alignment-free; frequencies switchable for all
negative and positive modulated standards via I
2
C-bus
•
Digital acquisition help, VIF frequencies of 33.4, 33.9, 38.0, 38.9, 45.75 and 58.75 MHz
•
4 MHz reference frequency input [signal from Phase-Locked Loop (PLL) tuning system] or operating as
crystal oscillator
•
VIF Automatic Gain Control (AGC) detector for gain control, operating as peak sync detector for negative
modulated signals and as a peak white detector for positive modulated signals
•
Precise fully digital Automatic Frequency Control (AFC) detector with 4-bit digital-to-analogue converter;
AFC bits via I
2
C -bus readable