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YAMAHA B-2 修理・整備済 正常動作品 (260530)
        

  • Product Quantity
    : 1
  • Starting Bid
    :5,000円
  • Highest Bidder
    : ktu******** / Rating:503
  • Listing Date
    :May 30, 2026 21:13
  • Bidding closes on
    :Jun 04, 2026 21:49
  • Auction Number
    :e1231799103
  • Condition
    :Damaged and stained (specify in description)
  • Automatic Extension
    :Yes
  • Authentication
    :No
  • Early Closing
    :Yes
  • Can I return the product?
    :no
  • Description
  • Q&A ()
  • Cost Estimator
  • Problem Item Response Procedur
Notes
  1. Plug-in electrical appliances are only shipped by air (shipping by sea requires commodity inspection)
  2. The remittance needs to be completed within the time required by the seller
YAMAHA B-2 パワーアンプの中古品を修理・整備したものです。

外観は比較的良好です。
メータ表面に映り込みがあります。汚れではありません。
写真で判断してください。

入手時、プロテクトがかかったりかからなかったりで不安定でした。
正常には出音せずに右CH が入力なしでもランダムな出力がありました。
修理・整備で正常になりました。



【修理内容】
・ 右CH ドライブ回路のトランジスタが破損していた。
同等仕様のオーディオ用新品トランジスタに交換 

・ 上記修理後にガサガサノイズが発生していた
ノイズ源トランジスタを同等仕様の新品トランジスタに交換

【調整・整備内容】
・ 入力レベル調整ボリューム4個 すべて取り外しアルコールに浸した状態で超音波洗浄、その後接点復活剤を塗布
・ スピーカーリレー2個 取り外して分解し接点磨き、および接点復活剤塗布
・ 終段のDCオフセット、バイアス電流の調整。
・ 入力RCAジャックの端子磨き

【測定・確認】
・ メータが正常に振れること、また同一入力レベルでL/Rで表示がほぼ一致していることを確認
・ 入力信号切り替え、スピーカー切替機能、外部信号でのVUメータ機能を確認済
・ リア・フロントの入力からの出音と周波数特性を測定。10Hz~120KHzまでフラット(-3dB 以下)であることを確認
・ 8Ω+8Ω負荷抵抗に25W+25W でスイープ信号を出力、数時間エージングし異常がないことを確認

・ ダンピングファクター測定(8Ω負荷抵抗 1KHz ON/OFF法 ): A側 L/R = 68/ 63 B側 L/R= 69/ 73 
(製品スペックは 70 でしたので、ほぼスペック通りでした。)


整備後の特性は写真-10 を参照してください。
現在のところすべての機能は正常です。


落札後 72時間以内にご連絡、ご入金がない場合、落札者削除を行いますのでご了承ください。
ノークレーム、ノーリターンでお願いします。

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Product Price JPY
Japanese Consumption Tax(10%) JPY

A 10% consumption tax is applied to goods and services in Japan. The price may include the tax or it may be added separately. Please check the price details when ordering.

Note: This is a domestic sales tax applied within Japan.

Japan Local Shipping Fee JPY Japan Local Shipping Fee Reference
Product Weight KG The maximum weight limit is 30 kg
International Shipping Methods
Proxy bidding and purchasing services are becoming increasingly convenient. However, overseas shopping carries certain risks and issues. To reduce these risks and enhance shopping safety, please be sure to read the following information:

1. International Shipping

   Air Freight: If the item status is not confirmed within two days after the arrival notice, any customer complaints cannot be addressed with the seller.

2. After Receiving the Product

Please confirm and inspect the product as soon as possible to ensure that the product specifications, quantity, accessories, and description are correct

If, unfortunately, there are any issues, you can refer to the following examples on how to report related product problems:
1. Example of missing product information
2. Example of product not matching provided information
3. Example of damaged product information

Important Notes: 1. If the seller is unwilling to ship overseas or is unaware that the product will be shipped overseas, the international shipping cost for returns or exchanges will need to be borne by the member. You may refer to the EMS e-Express fee inquiry from the post office. If it involves alcoholic beverages or items that affect flight safety, the post office cannot be used for shipment, and only DHL can be used to ship back to Japan.
2. During the product complaint handling period, please retain the complete outer packaging of the product (including the shipping label information), and refrain from attempting any repairs or altering the original condition. Any modifications may result in the inability to process the case.

3. After Inspecting the Product

After receiving and inspecting the item, if you have any questions, it is recommended to contact Letao within 2 hours. Here are some reminders:

1. Please do not unpack, use or repair the received item yourself, and be sure to keep the original packaging to facilitate subsequent handling of related matters, so as to avoid changes to the item that may cause the seller to be unwilling to process.

2. You can call customer service, and the customer service will leave a message for you as below. Please provide the following information:
"Hello, we will first help you establish a complaint case for Product ID: _______ .But we need you to 2-3 clear photos of the product issue, including photos of the product problem, product packaging, shipping details slip, and outer box. Send them to service@letao.my and inform us of your desired resolution (failing to provide this may result in an inability to process subsequent matters). After sending the email, notify us in the customer service message. We will confirm with the seller as soon as possible. and if there are any related questions, we will contact you through the customer service message. Thank you for your cooperation."

Please provide:
1. "Product ID"
2. Photo of the "Delivery Note" (if any)
3. Photos of the outer box (including inner and outer packaging)
4. Photos of the product (Please include relevant descriptions to help us confirm with the seller)

Important Notes:
1. Do not include foreign text or other products in the background of the image.
2. Please keep the complete product packaging (including the shipping label information), and refrain from repairing or altering the original condition on your own, as any changes may result in the case being unable to be processed.
3. Please provide the relevant information within 48 hours to avoid missing the golden hour for reflection and causing situations that cannot be handled.
4. Due to 99% of Japanese sellers being unwilling or unaware of shipping goods overseas, if a seller is willing to handle the issue, the goods must be sent back to Japan, and the international shipping costs incurred must be borne by the member. Letao will use postal EMS international express to send the goods back to Japan.
5. As the goods are purchased from overseas, it may take approximately one to two weeks to complete the relevant processing procedures when issues arise with the goods. Please be reminded that you can inquire about the approximate cost through the EMS service at the post office.

4. FAQ

1. Issue of Authenticity: If antique or branded goods are found to be counterfeit upon receipt, clear photos showing the differences between the genuine product and the imitation must be provided as evidence. If unable to provide relevant proof, assistance can be sought to find a third-party reputable organization for a premium authentication service .
2. Leaking Iron Teapot: If an antique iron teapot is leaking, please take clear photos of the leaking area and provide them.
3. Transport Damage: If the goods are damaged during international shipping (to the pickup point), you need to provide photos of the outer packaging of the parcel and clear photos of the damaged goods' outer packaging.

※ Note: Photos provided to sellers should not contain any foreign-related information.
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    Product name: YAMAHA B-2 修理・整備済 正常動作品 (260530)
    Notes:
    Customer service hours:
    • Monday to Friday 10:00-18:00
    Customer service hotline:
    Customer Service Email: service@letao.my