User's Manual

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1. GENERAL DESCRIPTION
The M40 platform includes 109B4 using 19” flat shadow mask CRT, 109S4 using 19”convention CRT
and 107P4 using 17” flat CRT, they are so-called “Digital Controlled Auto-scan Color Display Monitor”
with high resolution which can operate at horizontal scan frequency from 30kHz up to 97KHz, 92KHz
and 92KHz for109B4, 109S4 and 107P4 respectively, and vertical scan frequencies can operate from 50
to 160 Hz.
These monitors are equipped with an embedded micro-controller, which can preset the required modes,
the M40 also provides many functions, such as digital adjustable picture, DDC2B, sRGB, LF3, low
emission TCO99, high immunity, ---- etc.
These monitors comply with TCO99 low emission standard and also fulfill E2000 automatic power
saving requirements; to reduce power consumption less than 2 watts in power saving OFF mode, the
monitor also can complies with VESA standard and energy star computer program initiated by the EPA.
2. DESCRIPTION OF CIRCUIT DIAGRAM
This description mainly introduces the functions including power supply, horizontal / vertical deflection,
video amplifier, micro-controller and H / V convergence control, etc.
A. POWER SUPPLY
The monitor is designed to adopt switching mode power supply which can operate mains input from
90VAC to 264VAC, this switching power supply apply an IC TEA1507 for SOPS controller. The
control scheme transforms a switching converter from a voltage source into a multi-output voltage, the
control concept is exhibited many desirable properties such as inherent over-load protection, stable and
fast system response, the maximum output power capability is up to 110 watts for different models, then
a power limiting circuit is added for different power delivery and safety reason, on main power supply
circuit, secondary feedback via a photo-coupler is used to obtain a stable output voltage, the secondary
outputs supply all necessary voltages for deflection and video and micro-controller.
In order to meet new requirement of E2000 - power consumption less 2 watts @ off mode, The
TEA1507 power supply is adopt, the power applies SOPS technology, not only supply the +5V to
micro-controller & rest, and to be switched into burst mode via micro-controller for less 2 watts
requirement @ off mode (actual measuring data is typical 1 watt)
This monitor can save power consumption while no sync pulses and automatically recover to
normal power on when sync signals are detected by micro-controller, the power saving off mode still
exist in new designed monitors but suspend / stand-by mode are deleted due to pattern infringement
issue, but still reserve them for the option and future implementation required.
B. HORIZONTAL DEFLECTION / VERTICAL DEFLECTION / EHT GENERATOR
HORIZONTAL DEFLECTION:
The heart of horizontal/vertical deflection controller is TDA4841, which can offer a complete and
efficient small signal sync processing for auto-sync monitors, all functions are controlled via I2C bus.