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TA2020 アンプ基板
 
        

  • Product Quantity
    : 4 / Remaining:4
  • Starting Bid
    :1,600円
  • Highest Bidder
    : / Rating:
  • Listing Date
    :2025年12月20日 19時01分
  • Bidding closes on
    :2025年12月27日 19時01分
  • Auction Number
    :u1212296432
  • Condition
    :New product
  • Automatic Extension
    :No
  • Authentication
    :No
  • Early Closing
    :Yes
  • Can I return the product?
    :no
  • Description
  • Q&A ()
  • Cost Estimator
  • Problem Item Response Procedur
Notes
  1. The import of electronic parts requires relevant certificates, such as: IC, capacitors, transistors, power supplies... and other electronic related parts (such as motherboards, power transformers), and we cannot assist you in importing.
TA2020 スピーカーアンプ基板
信号ラインや電源部等のIC前部や出力フィルターコンデンサ等のIC後部は基本的にNFJからかつて販売されていたキット基板を踏襲しています。
異なるのはサガミの角形インダクタを使いたい&引っ越しの際にストックしてあったキット基板が1枚行方不明になった為基板を起こしてみました。

主な変更箇所
・サガミの角形インダクタに対応させる為SBDを2ミリほど前進させたので、GNDをトップレイヤーに移動してます。
・オリジナルでは7805はオプション扱いでボトムレイヤーの2箇所のパターンカットした後2ピンと30ピンを手配線で繋いで5V電源のD/A分離を行うようになっていますが、トッププレイヤーで2ピンと30ピンを接続しボトムレイヤーでのカット部分周りのパターン削除。これにより7805は必須となり7805無しでは動作しませんが無加工でで5V電源のD/A分離が実現できています。

本題の商品ですがアンプ基板のみですのでTA2020を含め必要部品は各自でご用意してください。

・IC
アンプIC TA2020 「共立」
3端子レギュレータ xx7805
・半導体
SBD 1N5819x8  「NFJ」
LED x1
・抵抗器
50K多回転型サーメットトリマーx2
1/4W 20Kx4
1/4W 1Mx2
1/4W 8.25Kx1(8.2Kで代用可)
1/4W 1Kx1
1/2W 10x2
・コンデンサ
フィルムコンデンサ 2.2ufx2
フィルムコンデンサ 1ufx1
フィルムコンデンサ 0.1uFx7(後部のフィルタ段の2個は良質なものを入れるのが良いらしい)
積層セラミックコンデンサ 0.1ufx1
1000uf~電解コンデンサx1
100uf電解コンデンサx1
22uf~電解コンデンサx2
・電源フィルター
フェライトビーズx1

・出力フィルター部
・・スピーカーが4Ωの場合(基板のシルク印刷デフォルト)
インダクタ 10uHx4 サガミの角形は秋月、サガミの円筒形はマルツ、円筒形の空芯コイルだとNFJ
フィルムコンデンサ 0.47ufx6
・・スピーカーが8Ωの場合
インダクタ 22uHx4 サガミの角形は秋月、サガミの円筒形はマルツ
フィルムコンデンサ 0.22ufx6
あまり言及されていませんが6Ωスピーカーの場合共にほぼ中点の下記数値で良いと思われます。
インダクタ 15uHx4 サガミの角形は秋月、サガミの円筒形はマルツ
フィルムコンデンサ 0.33uFx6

円筒形や面実装のインダクタ使用時はサガミの角形取り付け用の長孔はハンダで埋めると良いと思われますが、サガミの角形は円断面ではなく帯板状の断面の線材で巻かれておりますので、サガミの角形を出品者的には推します。


画像1枚目 基板表裏
画像2枚目 組み立て参考写真、基板表面 インダクタは以前マルツで買ってあったサガミの角形22uH
画像3枚目 秋月で売られている一回り大振りなサガミの角形にも対応しております。


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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
Singapore Package Import: Customs and Tax Policies
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-holdings.com 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: TA2020 アンプ基板
    Notes:
    Customer service hours:
    • Monday to Friday 10:00-18:00
    Customer service hotline:
    Customer Service Email: service@letao-holdings.com