THOMSON VP2750 Technical Manual page 29

ECO CIRCUIT
This circuit reduces consumption in Standby Mode from 9 W to 4.8 W by shutting off the display
and replacing it with a red LED on the front panel. Two transistors (TP095 and TP096) are
used to perform this function. In classic Standby Mode, these two transistors are blocked.
This function is enabled by Line 7 of the main menu, which supplies a Level 1 to Pin 24 of the
control microprocessor during the changeover to Standby Mode. This saturates the two
transistors.
The saturation of these transistors damps Transformer LP050, leading to a reduction in
frequency, to 23 kHz, and a reduction of the energy storage time. Because of this, all the
voltages fall, which limits consumption by eliminating the display.
Only the 5VE voltage remains at its nominal value because of the regulation.
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