Sign in   |  Join   |  Help
Click here to change your Beoworld Account Details

BeoVision 4. Problem in Rear Connection.

rated by 0 users
Answered (Not Verified) This post has 0 verified answers | 10 Replies | 1 Follower

alltvrepairs
Not Ranked
17 Posts
OFFLINE
Bronze Member
alltvrepairs posted on Wed, Dec 5 2012 10:10 AM

 

Hi, this is my First Post as couldn't find a similar post.
As a TV Engineer I have been hired to hook up Beovision 4 (65 Plasma) and BeoSystem 3 after client moved house.

 

I have connected  all the connections apart from one cable at the back of the Plasma. There are 3 male connections (12pins-8pins-8pins) and two cables coming out of the tv. 2 of which have 8 pins..(see attached pic) I don't know what are these for and if the plasma will power up without these. 

 

The BeoSyatem 3 has a green led which shows it is working (although it switches off after a couple of seconds), but there is no indication that the PLasma is working not even standby light, and yes power cable is connected. I have Service manual of the plasma but can't see these connections in the pdf. I am assuming there is a fault in the Plasma.

 

My questions:

 

1) Can I power up the Tv on its own without the BeoSystem? Note I have Beo 4 Remote only.

 

2) How can I remove the plasma from the rear stand. I tried to lift TV but was very heavy and not sure if lifting only is required.(see attached pic)
Images are found here: http://imageshack.us/g/819/img0470rg.jpg/

Thanks for the support.
http://www.AllTvRepairs.com

All Replies

beojeff
Top 75 Contributor
USA
1,148 Posts
OFFLINE
Bronze Member
Suggested by beojeff

I can't answer your second question, but I can suggest an answer for your first question.

You cannot turn the BeoVision 4 on directly with a Beo4. You need a Panasonic remote aimed from under the screen between where the aluminum cover and the screen are on the lower left corner. Many dvd remotes can be programmed to send out the IR signal for Panasonic video on/off. The Beo4, however, is not programmable. The BeoVision 4 natively responds to the Panasonic code. It requires the BeoSystem 3 PUC to be able to respond to the Beo4.

alltvrepairs
Not Ranked
17 Posts
OFFLINE
Bronze Member

Thanks for your response.

I think I can find a spare Panasonic remote control. But I assume that I should see a standby LED lit somewhere with the mains plug on.. or not?

Do you know something about the 3 bottom connections near the DVI socket?

kallasr
Top 50 Contributor
Germany
2,276 Posts
OFFLINE
Founder

Isn't there a RS232 socket in both BS3 and BV4?

This is used in the Beosystem 2 to send the control codes from the BS to the BV via serial cable.

Best regards
Ralf

Beosystem 4 with Beolab 7-6 on table stand (Center), Beolab 8000 (Fronts and Rears) and Beolab 2. Screen: Sony 55W905A. Beocenter 2 AO integrated via Beolink ML/NL Converter. Beosystem 3 MK I with Beolab 7-2 on table stand (Center), Beolab Penta 2 (Fronts), Beolab 4000 (Rears) and Beolab 2 driving a Sony VPL-HW55 projector. Beosound 9000 MK3 on horizontal wall bracket. Beosystem 7000 with Beolab 5000 Speakers. Loewe TV with Beolab 6002 and Beolab 11 (all white). Beocenter 6-26 white on motorised stand. In storage: Beolab 5000/Beomaster 5000. 

beojeff
Top 75 Contributor
USA
1,148 Posts
OFFLINE
Bronze Member

It seems that your picture did not attach to your post.

You will not see an LED on the BeoVision 4. Keep in mind that the BV4 is a Panasonic screen "made pretty" by the aluminum frame. The aluminum frame will be covering any buttons or lights that might have been present. All of the control is done via the BeoSystem 3. The BeoSystem 3 connects to the BeoVision 4 by way of a DVI cable for video. There is another cable that connects from the BeoSystem 3 to the BeoVision 4 for control. The control is more than just for IR commands. It also has control over the picture settings. 

I think that you might have to select some settings on the BeoSystem 3 for it to detect the BeoVision for and to send out the correct video. You do this by pressing MENU, MENU, GO on the Beo4 (I believe I got the order correct.) while the BeoSystem 3 is connected to the BeoVision 4.

You might want to make sure that you have the BeoSystem 3 IR sensor connected to the correct input on the BeoSystem 3. Also, check that all of the wires are connected and intact within the IR Sensor itself. These wires are very fragile and it's extremely easy to pull them out or break them.

beojeff
Top 75 Contributor
USA
1,148 Posts
OFFLINE
Bronze Member

BTW,

There might be more inputs underneath the BeoVision 4. The BeoVision 4 has modular input "blades" that can be added for multiple inputs. Sometimes these vary from model to model. There is typically an extra input for a PC connection.

alltvrepairs
Not Ranked
17 Posts
OFFLINE
Bronze Member

Good to know. I have uploaded a photo of the Beosystem connections. 

The strange thing is that I have removed the IR sensor cap on top of tv and checked for some voltage. There should be a small voltage typically 5v DC but everything seems dead. I also assume that the IR sensor should be detected even on standby, that's also why I am suspecting a faulty TV.

I think the supply voltage comes from the TV not from the Beosystem harness.

 

 


beojeff
Top 75 Contributor
USA
1,148 Posts
OFFLINE
Bronze Member

I believe that what you think is an IR sensor at the top of the screen is actually a picture calibration sensor. Do you have the external IR sensor that looks like a round hockey puck connected to the BeoSystem 3? It might be worthwhile for you to be a premium member on this site so you can get some of the more technical manuals. The BeoVision 4 screen is a rather unusual tv screen.

beojeff
Top 75 Contributor
USA
1,148 Posts
OFFLINE
Bronze Member

I stand corrected. According to the user guide on the Bang & Olufsen website, the BV4 does indeed have a built-in IR Sensor. 

alltvrepairs
Not Ranked
17 Posts
OFFLINE
Bronze Member

Hi Beojeff ,

Tought so as I found an IR receiver along with other circuitry for picture calibration, but thanks for confiming.

So don't you think that I should have found some voltages there? I assume that the Panasonic panel alone should drive this circuit.

I have repaired thousands of TVs but this is my first "BIG" B&O device and am really surprised how active seems this forum, with prompt relevant replies.  I have previously successfully repaired a couple of CRT B&O without any help, so if I register for a Silver/Gold Premier Membership, do I get more technical help. I have service manual for TV but not for BeoSystem 3, would I find such service manuals then?

 

BTW, thanks for your patience :)

 

 

alltvrepairs
Not Ranked
17 Posts
OFFLINE
Bronze Member

I have just purchased a reasonable Gold Membership. 

Page 1 of 1 (11 items) | RSS
Beoworld Security Certificate

SSL