ONKYO AV Center SA-205HD - Sound muddling/dropout issue repair - 2507

The Onkyo SA-205HD, a small and lightweight AV center, has relays in series for each of the three speaker (SP) circuits: "Front L/R," "Center," and "Surround L/R." Over time, contact failure in these relays can cause muffled sound, making normal listening difficult. Therefore, I have devised an "electrical countermeasure" that bypasses the relay contact points using LED indicators and toggle switches.

Before listing, I have confirmed that the following inputs and outputs are functioning correctly: "Line1-3," "Optical-1, -2," "HDMI1-1, -2," "Speakers (Front L/R, Center, Surround L/R, Subwoofer)," and "TV," as well as the operation of the fan.

1. Instructions for Use
* Three LEDs and switches corresponding to the three relays are located on the right side of the main unit (see photo). When the product is shipped, the switch levers are in the down position, and the "electrical countermeasure" is not activated.
* When the main unit is powered on, the LED corresponding to the listening mode will light up.
* By moving the switch lever below the lit LED from the down position to the up position, the "electrical countermeasure" is implemented, and normal sound will be produced.
* You do not need to touch the three switches during normal listening.

2. The items included are the "SA-205HD" main unit (with minor dents, scratches, and dirt on the top cover, etc., see photos) and the self-made accompanying document "(Outline of Measures for Muffled Sound/Sound Dropout)." Please prepare the "remote control (RC-678S)" and "instruction manual" separately.

3. Other
* Regarding returns, I will follow the Mercari Guide "Product Return Procedure." My approach is as follows:
* "Please proceed with the return shipping procedure after an agreement is reached with me (the top cover seal of the item must not be removed, and you must contact me regarding the return via email or phone within 7 days of the item's arrival)." Please note that the buyer is responsible for the return shipping costs. (The return address is listed in the "self-made accompanying document.") I will confirm that the item's seal has not been broken and then apply for cancellation on Mercari. The product price will be returned to the buyer according to the payment method after the transaction is canceled.