Denon AVR-2106, AVR-886, AVR-786, AVR-1906, AVR-686 Service Bulletin

100 Corporate Drive Mahwah, NJ 07430

Service Bulletin

No. : OST-F1031
Date:

January 23, 2007

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Model: AVR-886, AVR-2106, AVR-786, AVR-1906, AVR-686, AVR-1706,

AVR-486, AVR-1506, AVR-1306

Subject: Countermeasure for preventing the Power Amplifier Circuit from

breaking down.

Symptom: The transistor that is used to compensate the temperature rise of

the Power Transistor in the Output Stage is incapable of reacting to the rapid
temperature rise. Because the temperature rise is not compensated properly the
Power Amplifier Circuit may be damaged.

Solution:

and/or refurbishment of the unit. (The replacement of the capacitor and resistor is

applicable to each channel (C, FL, FR, SL, SR, SBL and SBR).

Please replace Transistor Q103 and resistor R101 upon repair

Parts:

Ref# Description Part Number

Q103 (C, FL, FR, SL,

SR, SBL and SBR)

R101 (C, FL, FR, SL,

SR, SBL and SBR)

2SC3964,
Transistor

RD14B2E681JT,

680Ω Resistor

00D 963 0280 107

00D 241 2398 913

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