Beocenter 2300 Mute Transistor defekt

[Roberto63]

Wo befindet sich bei der Beocenter 2300 der MUTE Transistor

[Guy]

You have asked this question a few times on the forum so I  thought I would have a look for the answer!

I could see from the circuit diagram in the service manual (available on Beoworld to Silver/Gold members) that it appears to be mounted on a separate board to the main PSU/Pre-Amp PCB (PCB2).  I couldn’t find a diagram, so I did a search with Google AI and received this answer:

Transistor Details: The mute transistor designated as TR1 in the Beocenter 2300 is a 2SC4213 SMD transistor.
Part Number: The specific part number for the TR1 mute transistor is 2SC4213.
Type: It is an SMD (surface-mounted device) transistor.
Location: The P-L MUTE circuitry uses two identical 2SC4213 SMD transistors (TR1 and TR2) and two 8.2K ohm resistors, which are mounted on a small, vertical 4-pin sub-board on the main PCB.
Function: A failure in one or both of these transistors is a known cause for audio issues, such as a popping sound when changing sources or one channel being dead, as they control the power-link (P-L) muting function.
Replacement: Replacements for this specific transistor are available from various online electronics suppliers.
If you are experiencing a mute-related problem, it is recommended to test both TR1 and TR2 and their associated components, as either or both can be the source of the fault.

I am guessing slightly but I think the small vertical PCB may well be the one that you can see the edge of (between the PL sockets and the 3 capacitors) in the PCB photo at this link:  https://kosetrading.com/product/bang-olufsen-bo-beocenter-2300-dab-radio-type-7400-power-supply-part-pcb-2/?srsltid=AfmBOoqX2I4oeoPjxBq0Qiioegkc5mxQQZ2tYzAHYY9v579QJKmKr1Mo

• This reply was modified 2 days, 3 hours ago by Guy.
• This reply was modified 2 days, 3 hours ago by Guy. Reason: Formatting after cut and paste from Google AI

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