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Hacking the Logitech Z5500
Hacking the Logitech Z5500
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Old 19th September 2015, 01:36 AM   #561
udem1234 is offline udem1234
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Join Date: Apr 2010
Default Z5500 direct connection through db15 - Center channel not working

Quote:
Originally Posted by neuweiler View Post
Hi,

After investing another 3 hours and studying the logic of the HTC139, I was able to fix some of my previous problems. Opposed to previous solutions for my PID 512 I had to hook up pin 7 to +5V and not connect pin 8 at all. This way, amplification is normal and no distortion occurs on the front channels. The only thing I didn't manage to get working without a workaround was the center channel. So I still had to connect +8V to center enable on the subwoofer board. I also added a switch between +5V and pin 7. I'll also add a LED before and after the switch to display main power and "power on".

Pin 7 and pin 8 are connected to 1A and 1B of the HTC139. 1G is always low. Y1 and Y3 are controlling "power on" and "center on". So with the right combination of signals on pin 7 and pin 8 you're able to switch on the amp. Feel free to hook up +5 or GND to those pins to experiment. Due to the HTC139 you won't do no harm.

The pin-out of my amp is:
1: Rear Right (brown)
2: Subwoofer (grey)
3: Left Right (yellow-black)
4: Center (blue-black)
5: Left Front (yellow)
6: not connected
7: Power ON (blue)
8: Mute (white)
9: Right Front (violett)
10: +8V (red)
11: ground (green)
12: ? (white-black)
13: ground (green)
14: +18V (red-black)
15: -18V (black)
I have a pre-636 Z5500. I managed to make it fully work using a direct connection using DB15 connector (I also used a voltage divider and impedance bridging very simple circuit to use it with RCA connectors at the other end)... except the center channel which is not working.

My question is, how can I make the center channel work (activate/unmute it) ? The circuit is different than yours, as it is an older board version.

Thanks in advance !


udem1234
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Old 7th October 2015, 08:19 AM   #562
beatinvasion is offline beatinvasion
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Join Date: Jun 2011
Hey guys, my Z5500 sub is broken than the Panel.
I created a video in German. I show how the Z-5500 as remodels active subwoofer.
I have created two more videos, I show how to modify the cable for the ipod.

https://www.youtube.com/watch?v=rDeqK2S_yAkHere is the link: Hacking the Logitech Z 5500

Have Fun
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Old 25th October 2015, 10:28 PM   #563
pentajazz is offline pentajazz
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Join Date: Jun 2015
I have read some of the post here but I am still a bit confused. I have a pid 938 unit. I would like to use only the active sub for now. I am not sure so someone could help to build the right cable.
Do I need the 5v voltage regulator, or this is used only in the pre 636 pid version? Do post 636 units need it? Accordind to some posts for post 636 units someone has to connect ground 13 to 6,7 and 8. Is this correct? Does the previous video suggests this?

For the active sub then I have to use just 2 and 13. Is this ok?
If I will use a volume control will this degrade sound quality? what are the best specifications for this?

thanks

Last edited by pentajazz; 25th October 2015 at 10:31 PM.
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Old 4th November 2015, 08:00 PM   #564
pentajazz is offline pentajazz
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Join Date: Jun 2015
Default Active sub post 636

Quote:
Originally Posted by pentajazz View Post
Accordind to some posts for post 636 units someone has to connect ground 13 to 6,7 and 8. Is this correct? Does the previous video suggests this?

For the active sub then I have to use just 2 and 13. Is this ok?
If I will use a volume control will this degrade sound quality? what are the best specifications for this?

thanks
I can confirm this works for a pid 938 unit, i guess amp is always on. This is only for the active sub, without volume control.

What I cannot do is use R + L for its input, just only one signal. Does anyone knows a way for this sub to use the stereo signal (R+L information) for the sub?
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Old 7th November 2015, 10:12 PM   #565
z5500user is offline z5500user
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Join Date: Nov 2015
Quote:
Originally Posted by kickeres View Post
Hi Guys,

I have intently read thru most of the post's on this thread, looking for answers for my z5500.

My right speaker suddenly started to have pops and crackle's going on constantly, but stopped when muting the system. After searching and searching i finally found the issue was in the cable end of the control pod. somewhere in the end of the cable it is broken and shorting or somthing. So in the end i got a new VGA plug and cut the end off my control POD's lead.

That was after i mapped the cables, colors and pins.

My PID is R439 and i tested that it wasnt the SUB by plugging in my second z5500's Control pod with a PID of R743, and that worked flawlessly.

The below is Pinout with colors and the meanings.

I Also found if you Short the Red +8V 10 with the Blue 7, it will turn the amp on. But i only used this for testing, as it had a mean as howl in the speakers. Probably because it may need a voltage regulator for the Pre amp, and 8V causes interference.


Shielded

Yellow - Left Front - 5
Blue/Black - Centre - 4
Black/Yellow - Left Rear - 3
Grey - Sub - 2
Brown - Right Rear - 1
Purple - Right Front - 9
Black - Neg - 15
Red - Positive - 14

Non-Shielded

Red - +8v Logic - 10
White - Enable - 8
Blue - Enable - 7
Orange - Enable - 6
Light Green - Ground - 13
White Black - MUTE - 12
Green - On/OFF - 11

After replacing the end of the cable, shes perfect again, no crackles etc..

Hope this helps someone.

Keddy.
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Old 7th November 2015, 10:23 PM   #566
z5500user is offline z5500user
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Join Date: Nov 2015
Default Replacement cable for popping/ crackling Z5500?

Quote:
Originally Posted by kickeres View Post
Hi Guys,

I have intently read thru most of the post's on this thread, looking for answers for my z5500.

My right speaker suddenly started to have pops and crackle's going on constantly, but stopped when muting the system. After searching and searching i finally found the issue was in the cable end of the control pod. somewhere in the end of the cable it is broken and shorting or somthing. So in the end i got a new VGA plug and cut the end off my control POD's lead.

That was after i mapped the cables, colors and pins.

My PID is R439 and i tested that it wasnt the SUB by plugging in my second z5500's Control pod with a PID of R743, and that worked flawlessly.

The below is Pinout with colors and the meanings.

I Also found if you Short the Red +8V 10 with the Blue 7, it will turn the amp on. But i only used this for testing, as it had a mean as howl in the speakers. Probably because it may need a voltage regulator for the Pre amp, and 8V causes interference.


Shielded

Yellow - Left Front - 5
Blue/Black - Centre - 4
Black/Yellow - Left Rear - 3
Grey - Sub - 2
Brown - Right Rear - 1
Purple - Right Front - 9
Black - Neg - 15
Red - Positive - 14

Non-Shielded

Red - +8v Logic - 10
White - Enable - 8
Blue - Enable - 7
Orange - Enable - 6
Light Green - Ground - 13
White Black - MUTE - 12
Green - On/OFF - 11

After replacing the end of the cable, shes perfect again, no crackles etc..

Hope this helps someone.

Keddy.
Where did you get your replacement VGA cable & connector? And do you have a photo of your rewiring? I have a POD with PID of 542 and it makes a popping / crackling noise on the Right Front Channel also. I'd like to try this fix.. Thanks - Also anyone else feel free to chime in if you have better suggestion. Thanks
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Old 21st December 2015, 02:37 PM   #567
aduser is offline aduser
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Join Date: Dec 2015
Hi guys! Listening z 5500 (PID R835). The question is. Can I get rid of filters that would be heard with full satellites frequency range? If there is in this thread 100% working universal solution, please tell me. Sorry for my English :-).
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Old 5th April 2016, 01:35 PM   #568
Diggidydave is offline Diggidydave
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Join Date: Apr 2016
Hey there, I'm new to this, but have it all cut up and wired just like your diagram. It does sound like the speakers have turned on though. I was wondering, in your diagram, it shows pin 7 (blue) which is enable amplifier, connected to ground. Would I want to connect this one to the voltage regulator output? I have the output of the voltage regulator connected to the pin 8 (White) enable mute... I'm thinking this may be the issue! Let me know
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Old 5th April 2016, 07:48 PM   #569
Diggidydave is offline Diggidydave
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Join Date: Apr 2016
Default 5500 Bypass Cable Construction

Hello,
I do realize it is 2016 and these threads are old, but would anyone be of any help: Here is my scenario.( A picture of my setup is attached)
My PID is R608 for the Z-5500.

Pins:
1- Brown (Right Rear)
2- Grey (Subwoofer)
3- Yellow/Black (Left Rear)
4- Blue/Black (Center)
5- Yellow (Left Front)
6- Not connected
7- Blue (Enable Amplifier)
8- White (Enable Mute)
9- Purple (Right Front)
10- Red (+8v)
11- Dark Green (On/Off)
12- White/Black (Mute)
13- Light Green (Ground)
14- Red/Black (+18v)
15- Black (-18v)

Anyways, I have them turned on and basically only the front left and right channels work. Cannot seem to get center/sub/and surround channels to generate sound.
Attached Images
File Type: png Z5500 schematic.png (56.4 KB, 440 views)
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Old 6th April 2016, 03:32 PM   #570
Diggidydave is offline Diggidydave
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Join Date: Apr 2016
Actually this did in fact work perfectly.... I simply had to update my sound driver for my pc lol.
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