Denon AVR-2105/885 Service Manual

Also see for AVC-1890: Service manual

Contents

8AVR-2105/885 / AVC-1890ADJUSTMENTAudio SectionIdling CurrentRequired measurement equipment : DC VoltmeterPreparation(1) Avoid direct blow from an air conditioner or an electric fan, and adjust the unit at normal room tempereture15 °C ~ 30 °C (59 °F ~ 86 °F).(2) Presetting● POWER (Power sourse switch) → OFF● SPEAKER (Speaker terminal) → No load (Do not connect speaker, dummy resistor, etc.)Adjustment(1) Remove top cover and set VR101, VR102, VR103, VR104, VR105 on Amp. Unit, VR106,107 on SURR.-BACK ch Amp.Unit at full counterclockwise ( ) position.(2) Connect DC Voltmeter to test points (FRONT-Lch: TP104, FRONT-Rch: TP105, CENTER ch: TP103,SURROUND-Lch:TP101, SURROUND-Rch:TP102, SURROUND-BACK Lch:TP106, SURROUND-BACK Rch:TP107).(3) Connect power cord to AC Line, and turn power switch "ON".(4) Presetting. MASTER VOLUME : "---" counterclockwise ( min.)MODE : 7CH STEREOFUNCTION : CD(5) Within 2 minutes after the power on, turn VR101 clockwise ( ) to adjust the TEST POINT voltage to 1.5 mV ±0.5 mVDC.(6) After 10 minutes from the preset above, turn VR101 to set the voltage to 2.5 mV ±0.5 mV DC.(7) Adjust the Variable Resistors of other channels in the same way.VR104TP104VR105TP105VR107VR106TP107TP106S BRS BLS RchVR102TP102VR103,TP103C chVR101,TP101F LchS LchF RchDC Voltmeter