PHILIPS 28PW6302 /00 " Black Line S " CHASSIS MD1.2E AA INTERNAL VIEW.

The PHILIPS CHASSIS MD1.2E AA is realized on two boards, Small signal vertically mounted and large signal on the bottom horizontal.
This kind of chassis remembers the past of PHILIPS K9 and K11 and K40 chassis types even realized with the same division concept.

It has Digital sound processing and a TDA8366 for all Video processing features.
THE TDA8366 is an I2C-bus controlled PAL/NTSC TV
processor

FEATURES
· Multistandard vision IF circuit (positive and
negative modulation)
· Video identification circuit in the IF circuit which is
independent of the synchronization for stable On Screen
Display (OSD) under ‘no-signal’ conditions
· Source selection with 2 Colour Video Blanking
Synchronization (CVBS) inputs and a Y/C (or extra
CVBS) input
· Output signals of the video switch circuit for the teletext
decoder and a Picture-In-Picture (PIP) processor
· Integrated chrominance trap and bandpass filters
(automatically calibrated)
· Integrated luminance delay line
· Asymmetrical peaking in the luminance channel with a
(defeatable) noise coring function
· PAL/NTSC colour decoder with automatic search
system
· Easy interfacing with the TDA8395 (SECAM decoder)
for multistandard applications
· RGB control circuit with black-current stabilization and
white point adjustment; to obtain a good grey scale
tracking the black-current ratio of the 3 guns depends on
the white point adjustment
· Linear RGB inputs and fast blanking
· Horizontal synchronization with two control loops and
alignment-free horizontal oscillator
· Vertical count-down circuit
· Geometry correction by means of modulation of the
vertical and EW drive
· I2C-bus control of various functions
· Low dissipation (850 mW)
· Small amount of peripheral components compared with
competition ICs
· Only one adjustment (vision IF demodulator)
· Y, U and V inputs and outputs.

GENERAL DESCRIPTION
The TDA8366 is an I2C-bus controlled PAL/NTSC TV
processor. The circuit has been designed for use with the
baseband chrominance delay line TDA4665 and for
DC-coupled vertical and East-West (EW) output stages.
The device can process both CVBS and Y/C input signals
and has a linear RGB-input with fast blanking.
The peaking circuit generates asymmetrical overshoots
(the amplitude of the ‘black’ overshoots is approximately
2 times higher as the one of the ‘white’ overshoots) and
contains a (defeatable) coring function.
The RGB control circuit contains a black-current stabilizer
circuit with internal clamp capacitors. The white point of the
picture tube is adjusted via the I2C-bus.
The deflection control circuit provides a drive pulse for the
horizontal output stage, a differential sawtooth current for
the vertical output stage and an East-West drive current for
the East-West output stage.These signals can be
manipulated for geometry correction of the picture.
The supply voltage for the IC is 8 V. The IC is available in
an SDIP package with 52 pins and in a QFP package with
64 pins (see Chapter “Ordering information”).
The pin numbers indicated in this document are
referenced to the SDIP52; SOT247-1 package; unless
otherwise indicated.












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The supply is based on MOTOROLA MC44603p which is a MIXED FREQUENCY MODE GREENLINE PWM CONTROLLER:Fixed Frequency, Variable Frequency,
Standby Mode.

The MC44603 is an enhanced high performance controller that is
specifically designed for off–line and dc–to–dc converter applications. This
device has the unique ability of automatically changing operating modes if
the converter output is overloaded, unloaded, or shorted, offering the
designer additional protection for increased system reliability. The MC44603
has several distinguishing features when compared to conventional SMPS
controllers. These features consist of a foldback facility for overload
protection, a standby mode when the converter output is slightly loaded, a
demagnetization detection for reduced switching stresses on transistor and
diodes, and a high current totem pole output ideally suited for driving a power
MOSFET. It can also be used for driving a bipolar transistor in low power
converters (< 150 W). It is optimized to operate in discontinuous mode but
can also operate in continuous mode. Its advanced design allows use in
current mode or voltage mode control applications.

Current or Voltage Mode Controller
• Operation up to 250 kHz Output Switching Frequency
• Inherent Feed Forward Compensation
• Latching PWM for Cycle–by–Cycle Current Limiting
• Oscillator with Precise Frequency Control
High Flexibility
• Externally Programmable Reference Current
• Secondary or Primary Sensing
• Synchronization Facility
• High Current Totem Pole Output
• Undervoltage Lockout with Hysteresis
Safety/Protection Features
• Overvoltage Protection Against Open Current and Open Voltage Loop
• Protection Against Short Circuit on Oscillator Pin
• Fully Programmable Foldback
• Soft–Start Feature
• Accurate Maximum Duty Cycle Setting
• Demagnetization (Zero Current Detection) Protection
• Internally Trimmed Reference
GreenLine Controller: Low Power Consumption in Standby Mode
• Low Startup and Operating Current
• Fully Programmable Standby Mode
• Controlled Frequency Reduction in Standby Mode
• Low dV/dT for Low EMI Radiation.