You mein three different Beograms on one Beomaster, or three Beomaster (different ones)

So sorry..!   I mean Beomasters. Apologies, they are all spare ones that I have had.

First of all, please Look if the two extra pins are screwed in the plug of the Beogram.

if not, beogram could not work with the ir-Signal.

must be 7 Pins.

beomaster 1: bigger problem, think needs full service.broken amp section.

beomaster 2: capicators on the ir Board Must be replaced 

beomaster 3::maybe everthing is fine, and the two Pins in the plug are missing.

otherwise we have to look further 

No.1. Sparks and blows plug fuse instantly.

Shorted mains transformer?

No.2. Does not recognise the MCP at all.

Option setting correct? (Bad backup battery?).
Bad or misadjusted IR receiver, bad capacitors or bad CPU.

No.3. All works fine, will not allow control of the Beogram with the MCP. Beogram itself..?

Missing datalink pin or lead broken off in Beograms DIN-plug or bad protection diode(s) in the Beomaster (if fitted) or cracked solder joints at the Beomasters socket.

Martin

Thank you so much for the response, I'll get chance this weekend to take the BM's apart. Out of interest where is/Which one is the IR board..? I will definitely follow up on your suggestions... Thank you again

The IR Board is screwed directly on the front of the Beomaster.

the pack up Battery is inside the cpu platine. You have to open the metal case to see it.

the cpu Board Sites in the front where most of the cables run into 

Thanks again for all the information, are there any details anywhere of the caps values so I can exchange them correctly. Can I buy the battery from Ebay..?

Thanks again for all the information, are there any details anywhere of the caps values so I can exchange them correctly. Can I buy the battery from Ebay..?

The battery is a normal 3v called 3032, you should find it nearly everywhere.

the value of the caps is written on the old ones. Take some with same specifications.

clean the ir diodes and in about 80% it should work again.

do the recapping before you change the backup battery.

maybe you do not have to change it.