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
Hi everybody,
I am new here but I am B&O fan and i have some problems with my "new" Beomaster 5500.
The whole story:
I bought an Beomaster 5500 with Master Control from e-bay several months ago.Unfortunately the machine has some problems. As I have some experience with the power amps and with the electronics, I easily find that two end transistors are blown up (BDV 614B; BDV 615B) and the protection turn of the receiver after start up. I was sad that i have to replace the original Philips transistors with "ON" Semiconductors Transistor but this was the best i find on the market. Now the power amp work perfect and all the voltages are adjusted as describe in the service manual.
Unfortunately i still can't enjoy my receiver because from the front panel buttons I can only power it on and change two functions. The receiver is in Radio mode and show me number 12 and that is.
I checked the remote control and it works fine. I mean there is signal from the two IR diodes (I checked with the my phone camera). When i push a button, I can see the function on the remote control display but also no connection is blinking.
I also replace the 3V battery on the processor main board but no difference.
I will strongly appreciate any help.
Thank you
Beomaster 5500; Beogram 5500;Beogram CD50; B&O CD5500; Yamaha AX-396; Yamaha TX590; Akai AM-U04;Philips CD473;Denon DCD520;TechnicsSL J110R; Hitachi DE-66; Speakers - Dynaudio 200;
Maybe Option Settings are not set right?(Just an idea, I don't know if this was possible with Beomaster 5500...)
Found this on the Forum:
A.OPT for audio components like BSd 4, Ouverture,...
V.OPT for video components like BVi 7 / 8 / ...
L.OPT for link products like BLb 3500, BeoLink Aktive, ...
Main-system:1 and 2
Link rooms:5 and 6 functions correspond to 1 and 2 but are for secondary "slave" components in additional "Link" rooms4 functions correspond to 2 but need "LINK"
0 = IR disabled - unit can only be operated manually or receive commands via ML
1 = accepts NO commands for "the other side" of main AV system V.OPT 1 only commands for video sources like TV, V.MEM, .. A.OPT 1 only commands for audio sources like CD, RADIO, ...
2 = accepts all commands for audio and video (eg TV receives all commands and sends the audio commands to the audio system in A.OPT 0
3 = not used in the ML system
4 = accepts all commands for audio and video (functions corresponds to 2) BUT you'll either have to press "LINK" before the command or have to select a"L.xxx" command from the "LIST" - used to adress eg an additional BLb 3500 in your living room where the main system is also installed.
5 = accepts NO commands for "the other side" (local components and main AV system) V.OPT 5 only commands for video sources like TV, V.MEM, .. A.OPT 5 only commands for audio sources like CD, RADIO, ...
6 = accepts all commands for audio and video ((local components and main AV system) local components have priority - if you have a BSd 9000 in your main room (A.OPT 0/1/2) and a BSd 4 (A.OPT 6) in your secondary room - pressing CD will start the local CD of the BSd 4 - pressing LIST > LINK >CD will get you the sound from your 9000
So for your Beomaster A.OPT 1 .
On Beolink 1000: Standy Sound 1 StoreOn MCP????
Ralf
Living Room: Beosystem 4, Beolab 7-2 (Center), Beolab 9 (Fronts), Beolab 8000 (Rears), no Subwoofer. Screen: Sony KD-85XH9096Dining Room: Beosound Essence MK II with Beolab 4000 on stands, fed by Amazon Echo Show 8Home Cinema: Beosystem 4, Beolab 7-4 (Center), Beolab 1 (Fronts), Beolab 4000 (Rears). Projector: Sony VPL-HW55Home Office: Beosystem 3, Beolab 7-4, Beolab 5000, Screen: Sony KD-55XH9005 on Beovision 7-40 stand, ML to Beosound 9000 MK3 and Beosound 5/Beomaster 5 (1 TB SSD version)Bedroom: Sony KD-65XH9077, Beosound Essence MK II with Beolab 6002 and Beolab 11 (all white, wall-mounted)
In storage: Beolab 5000/Beomaster 5000 (1960s).
BM 5500 don't support A-options. (just tried it)
//Bo.A long list...
A number of reasons can cause strange behaviour.
After replacing the battery it helps resetting the IC2 on PCB4. Disconnect from the mains, wait a litttle, and shorten the pin 8 (VB) from IC2 to ground with a piec of wire .Just a few seconds (leave batteriy in it's holder). After that put in the maincord.
Another thing is, that after replacing the output transistors, you might have triggered some other weaknesses, bad and almost cracked solder joints.
So check (by heart) P14 and P15 on the mainboard, P13 on the pc board and the connectors on the frontpanel. The easiest way to measure is to look if there is any signal is fed to the upc after an ir-instruction.
If the only thing what you have done is replacing the output transistors, then I would advise to start by replacing the 10 uF caps at the back near the heatsink at the back. Replacing a number of other caps around the output stages is also highly recommended.
Hi,
I take some actions regarding the Beobuddy advices. I check the P12,P13,P14,P11 terminals.The connections are OK. I reset the IC2 by connecting the pin8(VB) to the ground during the receiver is off and the battery is out of the holder. Unfortunately no difference. I measure some voltages which I am not sure if they are correct. At the pin 7 of IC2 I measured 275mV DC (on the schematic is shown as test pin )but what that mean? At the pin 5 (IC2, ser.data) are 5 V DC, no matter if the receiver is in stay by mode or switched on. On the pin 12 ,IC1 (IR input) i measured 2,3 V DC and on the pin 17 (IR transmit) 5V DC.
I will try to follow the IR signal path from the front panel diode to the IC1 IR input.Unfortunately I haven't an oscilloscope at the moment, but I have borrow from a friend, to see the signal.
I think, maybe I look for a problem at the wrong place. After i cheeked the IR signal path in the receiver and most of the transistors, i don't find something wrong. When i looked again the Master Control i saw that the diodes don't blink but they are on for a 6,7 seconds after pushing a button, no matter which one. Is it normal?
Any Ideas how to check if the Master Control works?
I have service manual for Master Control 5000 but it is different than 5500 which I have.
The problem is fixed. It was in the MCP. After cleaning and readjusting of the voltages with R117 (MCP6500 schematic which is the same as MCP5500) everything works properly.