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Need schematic and service manual for MS519 digital subwoofer

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T

treez

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We have a not working Mordaunt-short.com amplfier (MS519 Digital Subwoofer). It has previously worked.

We need to replace D152 on the main board (its near the big 4.7mF capacitor C152)

D152 has a diode symbol on the PCB silkscreen.

Please could you advise what is the manufacturers part number for D152, so that we can replace it.?...(Or do you know if its a zener or a straightforward diode)?

The amp is basically like this one here....looks just the same
https://www.youtube.com/watch?v=at4tzEIe3UY&t=311s

We have a JBL service manual which on this forum in a different post is said to contain the schematics for the MS409 and MS309 Mordaunt-short subwoofers. Do you know if the MS519 subwoofer is a similar power level to these two models?....if so, then i think our D152 is the D502 on the MS409 circuit and its a 16v zener, 1N5246B.

We dont yet have the schematic, we wrote to the company and they said Mordaunt -Short is no longer trading...then gave us the address of a company in Norwich UK who deal with their stock. So we have written to them, but no reply. Do you know if there is any way of getting a schematic for it? We dont need the schematic, but we just need to know what is D152 so we can replace it. Its in a kind of "1N4148 Axial" style case but may not be a 1N4148. The middle bit of the body had cracked due to being in some melted silicone, and the silicone had obviously been holding the cracked component together...but when we removed the silicone, the middle of the body was gone. So we can see an identifying part number on what's left of the case.
 

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