Daewoo DTC-29M5ME Service Manual

Contents

-43-N Function Description1 Blue Input Input of the “blue” amplifier. It is a virtual ground with 3.8V bias voltage,15 microamperss input bias current with 14KΩ input resistance.2 Vcc Low voltage power supply, typically 12V.3 Green Input See Pin 1.4 Red Input See Pin 1.5 VDD High voltage power supply, typcally 200V.6 Red Cathode Current Provides the video processor with a copy of the DC current flowing intothe red cathode, for automatic cut-off or gain adjustment. If this controlis not used, Pin 6 must be grounded.7 Red Output Output driving the red cathode. Pin 7 is internally protected ahainst CRTarc discharges by a diode limiting the output voltage to VDD .8 Ground Also connected to the heatsink.9 Red Feedback Output driving the feedback resistor network for the red amplifier.10 Green Output See Pin 7.11 Green Cathode Current See Pin 6.12 Green Feedback See Pin 9.13 Blue Output See Pin 7.14 Blue Cathode Current See Pin 6.15 Blue Feedback See Pin 9.PIN FUNCTIONBLOCK DIAGRAM OF EACH CHANNEL40kΩ0.8kΩ1kΩ5(12, 9)15V DD14(11, 6)20kΩ350Ω35Ω 35Ω218GND(3, 4)13(10, 7)REFERENCEVOLTAGE5101B-02.EPSBLOCK DIAGRAM OF EACH CHANNEL