Adjustment; Audio Section; Idling Current - Denon AVR-1907 Service Manual

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ADJUSTMENT

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Audio Section

Idling Current

Required measurement equipment: DC Voltmeter
1. Preparation
(1) 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).
(2) Presetting
• POWER (Power source switch)
• SPEAKER (Speaker terminal)
(Do not connect speaker, dummy resistor, etc.)
2. Adjustment
(1) Remove top cover and set VR101, VR102, VR103,
VR104, VR105, on Main Amp. Unit, VR106, VR107 on
2ch-Amp. Unit at fully counterclockwise
( ) position.
(2) Connect DC Voltmeter to test points (FRONT-Lch:
TP104, FRONT-Rch: TP105, CENTER ch: TP103, SUR-
ROUND-Lch: TP101, SURROUND-Rch: TP102, SUR-
ROUND-BACK Lch: TP106, SURROUND-BACK Rch:
TP107).
(3) Connect power cord to AC Line, and turn power switch
"ON".
(4) Presetting.
MASTER VOLUME : "---" counterclockwise (
MODE
TE
L 13942296513
FUNCTION
(5) Within 2 minutes after the power on, turn VR101 clock-
wise ( ) to adjust the TEST POINT voltage to 1.0 mV
± 0.5 mV DC.
(6) After 10 minutes from the preset above, turn VR101 to
set the voltage to 1.0 mV ± 0.5 mV DC.
(7) Adjust the Variable Resistors of other channels in the
same way.
DC Voltmeter
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VR104
F Lch
TP104
VR101
S Lch
TP101
TP107
S Back Rch
VR107
C ch
VR103,TP103
TP106
S Back Lch
VR106
S Rch
VR102,TP102
VR105
F Rch
TP105
co
.
5
AVR-1907 / AVR-787 / AVC-1630
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