<![CDATA[ChipMusic.org - Backlight/bivert problem DMG]]> https://chipmusic.org/forums/topic/19598/backlightbivert-problem-dmg/ Mon, 09 Jul 2018 09:28:40 +0000 PunBB <![CDATA[Re: Backlight/bivert problem DMG]]> https://chipmusic.org/forums/post/258349/#p258349 zensir says:

ok, hope you done this fix, i have an issue with the hex vibist chip also, take a look:
https://chipmusic.org/forums/post/258348/#p258348

]]> Mon, 09 Jul 2018 09:28:40 +0000 https://chipmusic.org/forums/post/258349/#p258349 <![CDATA[Re: Backlight/bivert problem DMG]]> https://chipmusic.org/forums/post/252424/#p252424 irony7 says:

Haven't done the fix yet.

]]> Wed, 26 Apr 2017 11:20:25 +0000 https://chipmusic.org/forums/post/252424/#p252424 <![CDATA[Re: Backlight/bivert problem DMG]]> https://chipmusic.org/forums/post/252423/#p252423 zensir says:

did you fix this? i think i have same issue. How did it go?

]]> Wed, 26 Apr 2017 10:44:35 +0000 https://chipmusic.org/forums/post/252423/#p252423 <![CDATA[Re: Backlight/bivert problem DMG]]> https://chipmusic.org/forums/post/252304/#p252304 irony7 says:
catskull wrote:

Here's a thing I had an issue with a while back: http://chipmusic.org/forums/topic/18845 … wo-shades/

Note where I cut the traces. Make sure you're not having the same issue.


Tha nk you for that link, Catskull, looks to be exactly the same problem.  As soon as I get home from work I'll gewt my head around it and do the fix.  smile

]]> Thu, 20 Apr 2017 06:46:58 +0000 https://chipmusic.org/forums/post/252304/#p252304 <![CDATA[Re: Backlight/bivert problem DMG]]> https://chipmusic.org/forums/post/252292/#p252292 catskull says:

Here's a thing I had an issue with a while back: http://chipmusic.org/forums/topic/18845 … wo-shades/

Note where I cut the traces. Make sure you're not having the same issue.

]]> Wed, 19 Apr 2017 21:40:57 +0000 https://chipmusic.org/forums/post/252292/#p252292 <![CDATA[Re: Backlight/bivert problem DMG]]> https://chipmusic.org/forums/post/252291/#p252291 irony7 says:

Understood, Apeshit. And it makes a lot of sense.  I'll do your suggestion with a lead first, but will at the same time check out moving the board to tge other side of the LCD pcb.

]]> Wed, 19 Apr 2017 21:34:14 +0000 https://chipmusic.org/forums/post/252291/#p252291 <![CDATA[Re: Backlight/bivert problem DMG]]> https://chipmusic.org/forums/post/252289/#p252289 Apeshit says:

I never said they shouldn't use a PCB. It's just mounted in a bad spot. Of course it will work, but it's bad practice to mount components under such a vulnerable spot. You could effectively use up half the space and still mount it on the back of the PCB.

]]> Wed, 19 Apr 2017 21:19:08 +0000 https://chipmusic.org/forums/post/252289/#p252289 <![CDATA[Re: Backlight/bivert problem DMG]]> https://chipmusic.org/forums/post/252288/#p252288 irony7 says:
Apeshit wrote:

Just keep them well trimmed, since that kit is mounted right under the ribbon cable carrying the high voltage for the LCD.

Will do.

Apeshit wrote:

These kits really should be designed to be mounted on the back of the PCB...

I've had success biverting with chips before, it's just that the pcb seem are so much sexier and take up less space.

]]> Wed, 19 Apr 2017 19:50:03 +0000 https://chipmusic.org/forums/post/252288/#p252288 <![CDATA[Re: Backlight/bivert problem DMG]]> https://chipmusic.org/forums/post/252287/#p252287 Apeshit says:
irony7 wrote:

I will do it,  Apeshit!  Tried to reflow the solder through the the holes to ensure contact with the pads underneath, but that is a definite possible culprit.

Just keep them well trimmed, since that kit is mounted right under the ribbon cable carrying the high voltage for the LCD.

These kits really should be designed to be mounted on the back of the PCB...

]]> Wed, 19 Apr 2017 19:42:44 +0000 https://chipmusic.org/forums/post/252287/#p252287 <![CDATA[Re: Backlight/bivert problem DMG]]> https://chipmusic.org/forums/post/252286/#p252286 irony7 says:

I will do it,  Apeshit!  Tried to reflow the solder through the the holes to ensure contact with the pads underneath, but that is a definite possible culprit.

]]> Wed, 19 Apr 2017 19:39:47 +0000 https://chipmusic.org/forums/post/252286/#p252286 <![CDATA[Re: Backlight/bivert problem DMG]]> https://chipmusic.org/forums/post/252285/#p252285 Apeshit says:

Does the installation really not call for pins to be put through the pads? That's super janky. It's probably just not making full contact. Try adding a metal lead through the pads. Clip one off of a resistor or LED or something.

]]> Wed, 19 Apr 2017 19:35:42 +0000 https://chipmusic.org/forums/post/252285/#p252285 <![CDATA[Backlight/bivert problem DMG]]> https://chipmusic.org/forums/post/252284/#p252284 irony7 says:

I did a backlight and bivert mod on A DMG-01, using a Deadpan Robot backlight kit and a Hand Held Legend pcb. After modding, all grey tones have disappeared, as shown in the following image:

The connections on the bivert pcb seem correct according to HHL's instructions, can read any short circuits across the pins and the ribbon cable seems properly seated. Image of the pcb here:



Before I pull the bivert pcb to test if the system is otherwise working properly, I've gotta ask - has anyone else run into this problem, and, if so, any ideas on the cause?

]]> Wed, 19 Apr 2017 18:24:45 +0000 https://chipmusic.org/forums/post/252284/#p252284