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| November 14, 2012, 2:44 pm |
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| Author |
KDL 40x3500 Volume Panel |
Lee52
Rank: Sony Fan
Joined: Mar 20, 2011
Posts: 6
From:
 |  Posted: 2011-03-20 10:39
Hi,
Whilst dis-connecting the speaker on my 40X3500, I accidentally knocked the loose volume Panel & dis-connected the wires from the connector on the board.
(The wires weren't soldered in, so I'm assuming they push into the connector.)
Would anyone know the correct configuration for re-assembly.
Thanks in advance, hope you guys can help me out here.
Lee
[ This message was edited by: Lee52 on 2011-03-20 10:40 ]
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mbt_junkyard
Rank: Sonyphile
Joined: Sep 15, 2008
Posts: 659
From: EU
| Posted: 2011-03-20 13:10
From the manual of the FIX2 chassis (USA version) I've looked at the connectors of the H1 board.
The schematic diagram shows a 8-pin connector CN3001 which connect the switches with the chassis. Three pins are ground ("GND"), one is for the power switch ("POWER_SW"), one is for the other keys ("KEY") and one is called "KEY_WAKE". The remaining two positions "D3.3V" and "LEAN1" are not electrically connected.
When looking at the layout of the printed circuit board, instead of "KEY_WAKE" the indication "NC" (Not Connected) is drawn.
As I see only three wires on your photograph, I think that only GND, KEY and POWER_SW are used.
To determine which is which you can do the following. Connect the set to the mains and take one of the three disrupted wires. Then push the metal end of this wire onto the metal back of the LCD panel for a short moment. See if this switches on (or off) the set in any way by observing the green and red lights at the front. If there is no reaction at all, repeat the same procedure using another of the three wires.
When the set is reacting when you push the end to the metal chassis, this wire is the "POWER_SW" wire and you can mark it accordingly.
Then put the set on, using the "POWER_SW" wire method.
Use the remote control to set up a picture and adjust the volume to listening level.
Then keep one of the other two wires to the metal of the LCD panel. If the volume lowers then, this is the "KEY" wire. If nothing happens, try the same using the other wire.
The line which let disappear the sound is the "KEY" wire and the remaining one is the "GND" wire.
Now you know which wire is which. You can try to remount the pins in the connector using their identification as you gave them and the identification text next to the connector.
There is a small piece of metal on each pin that is bent a little bit that it is only possible to put the wire in the connector and prevent it from getting loose. Normally you can re-bent this metal piece that you can reuse the same pins. Alternatively you could solder the wires directly onto the board, using the schematic diagram.
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Lee52
Rank: Sony Fan
Joined: Mar 20, 2011
Posts: 6
From:
| Posted: 2011-03-20 15:54
Thanks for the quick response. mbt, much appreciated.
Thanks to your advice, I have now identified the three wires, but I'm still having trouble with the connector.
The only Fix2Chassis schematic I could find was for a KDL 40W3000, maybe because that's a different model, I could only see five pins on the connector diagram. Of course, I may have read the diagram wrong!
I cannot see any identification text on the board itself
I have put in a request for a correct service manual for my model in the manual board, so hopefully I'll have a reply soon.
Thanks once again for your swift response.
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mbt_junkyard
Rank: Sonyphile
Joined: Sep 15, 2008
Posts: 659
From: EU
| Posted: 2011-03-20 16:55
For some reason I never have managed to get a file uploaded to Agoraquest ("Couldn't copy file to server"), however the instructions are very straightforward, I ask you to send an email to tv(at)techie(dot)com to make it possible for me to send you the diagrams you need.
I've marked your photographs which pins (or solder islands) to use.
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Lee52
Rank: Sony Fan
Joined: Mar 20, 2011
Posts: 6
From:
| Posted: 2011-03-20 17:13
Email sent. Thanks so much for the help & speedy response.
It's from my Yahoo address, just in case it may get caught by spam filters.
[ This message was edited by: Lee52 on 2011-03-20 17:28 ]
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Lee52
Rank: Sony Fan
Joined: Mar 20, 2011
Posts: 6
From:
| Posted: 2011-03-21 05:54
Hi Mbt,
The first wire I touched to the chassis very briefly to the chassis i believed to be the Power_Sw, because the set turned off when it touched the chassis.
( the white one- there's two greys & a white)
But, the set won't turn back on, & I now have no Illumination on the "Sony" logo on the bottom of the set. The set is no longer in standby when i plug it in at the mains, either.
Help required!!!
Thanks,
Lee
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mbt_junkyard
Rank: Sonyphile
Joined: Sep 15, 2008
Posts: 659
From: EU
| Posted: 2011-03-21 10:07
This is the normal operation of the set!
If you switch it off (either by pressing the button or using the "tapping wire" method) and remove the mains voltage, the set will be in switched off condition after re-applying mains voltage.
In this situation you have to use the POWER switch (or tap the "POWER_SW wire) once to activate the set.
What condition is entered then depends on the state the set was in before switching off. Was it in standby then, the set will go into standby again (red LED). Was it operating, the set will go in operational mode (green LED).
So, are you sure you tried to get the set back on using the "POWER_SW" wire?
P.S. Unfortunately I can't find a service manual for the UK version of the FIX2 chassis. There is a KDL-xxWxxxx model with a 5-pin connector on the H1-board (top control panel) instead of a 8-pin connector (side control panel). But as only three wires are used, there is no change that a short-circuit caused the problem you have now. All lines are intended to be connected to ground directly.
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Lee52
Rank: Sony Fan
Joined: Mar 20, 2011
Posts: 6
From:
| Posted: 2011-03-21 10:43
Managed to repair perfectly, thanks to your instructions.
I'd turned the set off via the POWER_SW wire, & then tried to turn it on with the remote, with no response. I Then touched the wire on what I THOUGHT was metal, but no response. When I touched it on metal on the bezel, it came back on.
Certainly made me sweat a bit!! Thought I'd blown a fuse somewhere on one of the boards!
Thank you so much for your time, expertise & willingness to help me out on this matter, it's very much appreciated, thank you.
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mbt_junkyard
Rank: Sonyphile
Joined: Sep 15, 2008
Posts: 659
From: EU
| Posted: 2011-03-21 11:32
I know the feeling you must have had, but this part of the circuit is "short-circuit proof" so I couldn't imagine that something was damaged or blown.
Glad to hear that all is OK now!
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