Daewoo DV-K580NZ-T service manual Circuit Operation, Video Part, REC Mode

CIRCUIT OPERATION

1. VIDEO PART

1-1) EE MODE

Video Signal which is output from RL902 is input to pin 37 of IC301 through OSD IC. It is amplified 6dB by AGC, then it is output to pin 34. This output signal is output to Video Jack through RL902 of RELAY IC.

1-2) REC MODE

The signal which is input to pin 37 of IC301 is output to pin 3 through IC internal AGC AMP. If this output signal has burst, it is input to X303 then it separates color signal. If it has not burst, it will pass Y-Emphasis circuit. Each signal is input to pin 4 then passes 3.5M LPF. Luminance signal is output from pin 40 after FM modulator through MAIN-Emphasis and color signal is output from pin 15 after low-converted. Each signal is input to pin 12 of IC401 through REC-EQ, then it is recorded on the tape through HEAD after passing out MIX AMP.

VIDEO IN

V.IN

IC001

OSD IC

REC Y

REC EQ

VIDEO OUT

IC301

VIDEO IC

REC C

WITH

BURST

X303

Y/C

COMB

Y-EMPA

CIRCUIT

IC401 HEAD AMP

16