Denon AVR-786 Service Manual

Also see for AVR-786: Operating instructions Brochure & specs Operating instructions

Contents

6AVR-1906 / AVR-786 / AVC-1620Video SectionComponent Video Level AdjustmentRequired measurement equipment etc.: Oscilloscope, DVDVIDEO PLAYER (ex: DVD-1500)Test disc: DVD T-S011. Preparation(1) Avoid direct blow from an air conditioner or an electricfan, and adjust the unit at normal room temperature 15 °C~ 30 °C (59 °F ~ 86 °F).(2) Playback the color-bar 75% of the Test Disc (Title 12) us-ing the DVD Video Player, and check that Y and C levelsof the S terminal output are within the specified outputlevels.If they are out of the specified levels, adjust with the vari-able resister inside of the unit.(3) Presetting• POWER (Power source switch) OFF• SPEAKER (Speaker terminal) No load(Do not connect speaker, dummy resistor, etc.)• DVD (Video terminal) No input2. Adjustment(1) Remove top cover and set VR901, VR902, VR903, on C-S VIDEO2 Unit at fully counterclockwise ( ).(2) Connect a pin-plug terminated with 75-ohms to Y (Cb, Cr)of the Component Video Monitor Output, and hook up theOscilloscope’s probe to both ends of the pin-plug.(3) Connect S terminal output of the DVD Player with theDVD input terminal of the Receiver.(4) Connect power cord to AC Line, and turn power switch"ON".(5) Presetting.• FUNCTION: DVD• Playback the color-bar 75% of the Test Disc (Title 12)(6) Turn VR902 clockwise ( ) to adjust the COMPONENTVideo Y voltage (except H. Sync) to 714 ± 50 mVp-p. (Re-fer to Fig. 1)(7) Adjust the Variable Resistors of Cr: VR901 and Cb:VR903 in the same way. (Refer to Fig. 2, 3)Cb,Cr: 486 ± 50 mVp-p. (U.S.A. & Canada model)525 ± 50 mVp-p. (Others)