ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Hello everyone first post time!
Had the BM5000 (1984) since new. Working OK until a few weeks ago. Had an intermittent power cut - off and on a few times then off. The unit was on standby at the time and fed from a UPS with inbuilt power surge protection and EMI/RFI filtering.
Now it won't turn on. The standby LED is lit. Panel OPEN function inoperative. Pressing MUTE/PLAY causes the standby LED to flash on/off. There is a sound from the speakers at power on and off as normal. And the relay in board 3 works OK. All voltages from the PSU are present within +/- 10%.
I am thinking it may be the processor board.
Any help or advice appreciated.
Thank you!
In case anyone is following this, I replaced the processor board with one from another faulty unit (with PSU problems).
It now works 100% again
I like to keep the old stuff going.....
I have a Crown power amp in my studio that I bought 50 years ago. Never needed any attention...yet!
Crown DC-300A?
D150...I use it with 15" Tannoy Classic dual concentrics which are very sensitive. Thus saving power and the planet
I would suggest turning power off at the plug whenever possible in order to protect the vulnerable BM5000 processor from damage.
I have now repaired 2 faulty BM5000 processor boards simply by replacing 4C59 33uf/6v axial electrolytic capacitors at a total cost of £1.00
The reset was non-functional in each case.
Both old capacitors had exploded!
BTW both boards used coin cells for memory backup. Type CR2430.