SKU: 13669300813

Sensor Transistor and Biasing Trimmer (Beogram 4002, 4004 and 4000)

Sale price$26.10 Regular price$29.00
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Description

Sensor Transistor and Biasing Trimmer (Beogram 4002, 4004 and 4000)Beolover Sensor Arm LED Light Source for Beogram 4002 4 and 4000: Replaces the sensor transistor and biasing resistor in any Beogram 4000, 4002 and 4004. Many original transistors lost some of their gain, which may disable the record detection function. As a consequence the arm may drop on an empty platter. Ouch!!! Replacement ensures that the record detectionj functionality works properly. Replacing the original fixed value biasing resistor with a

Beolover Sensor Arm LED Light Source for Beogram 4002/4 and 4000:

  • Replaces the sensor transistor and biasing resistor in any Beogram 4000, 4002 and 4004.
  • Many original transistors lost some of their gain, which may disable the record detection function. As a consequence the arm may drop on an empty platter. Ouch!!! Replacement ensures that the record detectionj functionality works properly.
  • Replacing the original fixed value biasing resistor with a 5MOhm trimmer allows adjusting the bias to meet the gain spec given in the manual (4V at collector)
  • Direct drop in replacement. Replaces 1TR3/R26 in DC motor Beogram 4002 (Type 551x/552x), 1TR9/1R33 in AC motor Beograms (Type 550x) and 1TR14/1R33 in Beogram 4000 models.
  • Comes with alignment fixture to position LED board in correct location.
  • See this Beolover blog post for an introduction to the restoration of the sensor arm and record detection circuit.
  • Installation requires soldering/desoldering capability, and potentially requires an oscilloscope for trouble shooting. Some experience with electronics is helpful.
Follow us on the Beolover Blog for updates and info about our B&O restoration efforts.
    Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
    • Except Preorder products are shipped in 48 hours.
    • Delivery to the USA:
    1. Standard Shipping : 3-10 business days
    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 13669300813

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    4.7 ★★★★★
    Based on 12 reviews
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    Dakota's
    Dallas, US
    ★★★★★ 1
    Not worth the time
    Color: Light Brown, Size: 4
    Plastic pieces for the dry wall broke and also created an even bigger hole in the wall. One of the shelves wouldn’t even stay level despite following all instructions. Wood gives you splinters as well since it’s not sanded down.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 6, 2026
    M
    Verified Purchase
    Miah
    Charlottesville, US
    ★★★★★ 5
    Solid Floating Shelves 🛠️🏠
    Color: Black, Number Of Shelves: 4, Size: 15.7in
    I have installed four sets of the black floating shelves in my office. They are made of high quality materials, featuring a sophisticated black woodgrain finish with a natural texture. Supposedly, each unit can handle up to 22 pounds, though I would not recommend testing that limit with your vintage bowling ball collection if you value your flooring. They are awesome. The value is good for a set of two. Each shelf measures 22x7x1 (56x17x3 cm) inches, providing a decent amount of storage for books or decor. The installation was straightforward since the hardware for multiple wall types was included. They work well in the kitchen for spices or in the bedroom for personal belongings. One tip for a secure fit: use a level during installation and make sure the bracket is flush against the wall before sliding the shelf on, or your photos might look like they are sliding off a mountain 📐 These shelves offer a clean, modern look and stay stable once mounted correctly. They are a practical choice for adding functional display space to any room 🖼️
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 4, 2026
    T
    Verified Purchase
    Tyler Kline
    Grantham, US
    ★★★★★ 5
    Good looking shelves and easy install - skip the included drywall anchors
    Color: Black, Number Of Shelves: 2, Size: 22in
    I installed these shelves in a bedroom to get things off my dresser and some decor. Once mounted they look really nice. The black finish looks clean and modern and they blend in well with the room. Installation was pretty straightforward. The metal bracket mounts to the wall first and then the shelf slides over the bracket. As long as you take your time lining things up it’s a simple project. One thing I strongly recommend is not using the white plastic self-drilling drywall anchors that come with the kit. I’ve used that style before on other projects and they tend to strip out easily and leave larger holes in drywall. I used better anchors instead and the shelves mounted much more securely. The rest of the hardware worked fine and once installed the shelves feel solid and hold items well. Pros - Clean modern look - Easy installation - Feels solid once mounted - Good size for books or decor Cons - The small level included isn’t very accurate — use your own level - One of the metal brackets was slightly bent out of the box but straightened out easily Helpful tip: Use your own level and better drywall anchors if you have them. It makes installation easier and the shelves will mount much more securely. Final thoughts: For the price these are nice looking floating shelves that install easily and work well for light storage and decor.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on March 13, 2026
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    Verified Purchase
    Coffman, H
    Draper, US
    ★★★★★ 5
    Cheap, and effective!
    Color: Black, Number Of Shelves: 4, Size: 15.7in
    Looks good, works great, low cost. I'll be purchasing more in the future.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 12, 2026
    A
    Verified Purchase
    Amazon Customer
    West Palm Beach, US
    ★★★★★ 4
    Cute for coffee bar!
    Color: Black, Number Of Shelves: 4, Size: 15.7in
    Great for above my coffee bar. Easy to mount and align. Seems stable!
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 14, 2026

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