bought a Beomaster 4500 with COde error

[carolpa]

I bought a “broken” Beomaster 4500 cheap. After plugging the BM4500 to the mains, it displayed the COde error.
After the “1 2 7 1 trick” the BM4500 seems to work normal.

Will a new battery solve this problem completely?

What are the experiences? Please advice

[Guy]

I’ve only carried out the procedure on a couple of BC9500s, but no-one else has replied.

For me, a new battery solved the problem – I think I had to carry out the COdE procedure again after battery replacement, but there have been no further problems since with either system.

In my experience, if you keep the system connected to mains power the problem may not re-occur – my mother-in-law’s system failed early because she switched it off at the wall every night.  However, if the battery is flat then it may be close to leaking, hence worth replacing.

I’m currently debating changing the battery in a BS3000 that I have taken apart for door/CD belt changes – will probably do so to give it a longer lifespan.

Location: Warwickshire, UK
My B&O Icons:

[carolpa]

Guy wrote:

I’ve only carried out the procedure on a couple of BC9500s, but no-one else has replied.

For me, a new battery solved the problem – I think I had to carry out the COdE procedure again after battery replacement, but there have been no further problems since with either system.

In my experience, if you keep the system connected to mains power the problem may not re-occur – my mother-in-law’s system failed early because she switched it off at the wall every night.  However, if the battery is flat then it may be close to leaking, hence worth replacing.

I’m currently debating changing the battery in a BS3000 that I have taken apart for door/CD belt changes – will probably do so to give it a longer lifespan.

thx

Is the battery on the “minus” side also soldered as the plus side is? It looks like the battery is stuck on the PCB.  I opened “the box” also on the opposite side, but it was unclear to me where it was soldered on the PCB (maybe I shoud re-examine it), any help would be appreciated.

[Guy]

I think it’s the same battery at the BC9500.  I use these which fit perfectly as they have the correct pin spacing:  https://uk.farnell.com/renata/cr2450-nfh-lf/cell-lithium-button-2pin-3v/dp/1319731

As you can see both pins solder on the same side (other side from the physical battery).

EDIT:  After replacing the battery you may need to adjust the FM/AM offset in Test Mode as explained on page 7-3 of the service manual. (That’s assuming you have FM/AM stations in your area with known frequencies)

Location: Warwickshire, UK
My B&O Icons:

[carolpa]

Guy wrote:

I think it’s the same battery at the BC9500.  I use these which fit perfectly as they have the correct pin spacing:  https://uk.farnell.com/renata/cr2450-nfh-lf/cell-lithium-button-2pin-3v/dp/1319731

As you can see both pins solder on the same side (other side from the physical battery).

EDIT:  After replacing the battery you may need to adjust the FM/AM offset in Test Mode as explained on page 7-3 of the service manual. (That’s assuming you have FM/AM stations in your area with known frequencies)

Thx for the link. I ordered one.
The Beomaster had an ordinary  CR2450 Cell Battery cable soldered to the PCB

[Author]

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