DENON AVR-790_AVR-590_AVR-1910_AVR-1620_AVR1610 _ SERVICE ADJUSTMENTS

INITIALIZING 

AV SURROUND RECEIVER initialization should be performed when the μcom, peripheral parts of μcom, and Digital P.W.B. are replaced.

1. Switch off the unit.
2. With the "SURROUND MODE 0" and "SURROUND MODE 1" buttons pressed, press the "ON/OFF" button to turn the power on.
3. Check that the entire display is flashing with an interval of about 1 second, and release your fingers from the 2 buttons and the microprocessor will be initialized.

If step 3 does not work, start over from step 1.

All user settings will be lost and this factory setting will be recovered when this initialization mode.  So make sure to m+emorize your setting for restoring after the initialization.

ERROR CHECKING MODE

Error mode (Displaying the protection history):

When started up, the error information is displayed.

Starting up:

For all models

• With the "STATUS" and "MULTEQ" buttons pressed, press the "ON/OFF" button to turn the power on. The error (protection history display) mode is set.
• Now, press the "STATUS" button to turn on the FL display

About the display on the FL display

• When the "STATUS" button is pressed after setting the error (protection history display) mode, a history like the one shown below is displayed, depending on the conditions.

Clearing the protection history

There are two ways to clear the protection history, as described below.

1. Start up the error (protection display) mode, display the error, then press and hold in the "ENTER" button for 3 seconds.
2. Initialize.  # If you want to save a backup. 

AUDIO SECTION ADJUSTMENT

• Idling Current
• Required measurement equipment: DC Voltmeter.

Avoid direct blow from an air conditioner or an electric fan, and adjust the unit at normal room temperature 15 °C ~ 30 °C (59 °F ~ 86 °F).

Presetting

POWER (Power source switch) OFF

SPEAKER (Speaker terminal) No load.  (Do not connect speaker, dummy resistor, etc.)

ADJUSTMENT

• Remove top cover and set VR1201 FL, FR, C, SL, SR, SBL, SBR on 7CH AMP UNIT at fully counterclockwise (c) position(1910/790 model).
• Remove top cover and set VR1201 FL, FR, C, SL, SR on 5CH AMP UNIT at fully counterclockwise (c) position(1610/1620/590 model).
• Connect DC Voltmeter to test points (FRONT-Lch: TP1201, FRONT-Rch: TP1205, CENTER ch: TP1203, SURROUND-Lch: TP1202, SURROUND-Rch: TP1204, SURROUND-BACK Lch: TP1207(1910/790 model), SURROUNDBACK Rch: TP1206 (1910/790 model)).
• Connect power cord to AC Line, and turn power switch "ON". 
• Presetting.
• MASTER VOLUME: "---" counterclockwise (min.)
• SPEAKER (Speaker terminal) : No load
• (Do not connect speaker, dummy resistor, etc.)
• MODE : 7CH STEREO (5CH STEREO)
• FUNCTION : CD
• Within 2 minutes after the power on, turn VR1201 clockwise (x) to adjust the TEST POINT voltage to 1.5 mV ± 0.5 mVDC.
• After 10 minutes from the preset above, turn VR1201 to set the voltage to 2.0 mV ± 0.5 mV DC.
• Adjust the Variable Resistors of other channels in the same way.