Cluster LCD dimming ?
04-25-2017 | 04:42 AM
#1
Thread Starter
New Members
Joined: Mar 2017
Posts: 7
Likes: 0
From: Brussels
My Ride: BMW 635D
Cluster LCD dimming ?
Hello,
My LCD display is changing too much with the ambient light.
I have found the phototransistor in the cluster :
Any idea what are its characteristics ? I would like to replace it with a resistance, variable eventually...
Thanks in advance !
My LCD display is changing too much with the ambient light.
I have found the phototransistor in the cluster :
Any idea what are its characteristics ? I would like to replace it with a resistance, variable eventually...
Thanks in advance !
04-25-2017 | 05:52 AM
#2
Senior Members
Joined: Oct 2009
Posts: 1,380
Likes: 3
From: Indiana, USA
My Ride: 2007 530xi: Sport, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, HD Radio, SAT, Custom NCS coded options 2008 535xi: Sport, Night Vision, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, SAT, Custom NCS coded options, Rear Seat Heat Retrofit, Passport 9500ci
Model Year: 2008
Engine: N54
What year/model is this? I have not seen any of mine that change dim levels automatically. They are all manually adjusted.
04-25-2017 | 08:23 AM
#3
New Members
Joined: Dec 2012
Posts: 571
Likes: 10
From: Montreal Quebec Canada
My Ride: 2005 545i, premium package, 6sp manual, cold package, navigation package.
Model Year: 2005
Engine: N62
Mine changes with ambient light. The dash manual control also changes it. 2005 545 MT6.
04-26-2017 | 01:13 AM
#4
Thread Starter
New Members
Joined: Mar 2017
Posts: 7
Likes: 0
From: Brussels
My Ride: BMW 635D
The general brigthness can be adjust manually, but the phototransistor works in parrallel.
newTis.info : Dimming of the instrument cluster.
The brightness of the liquid-crystal display and all indicator and warning lights is adapted to suit ambient lighting conditions. This function is implemented by a phototransistor in the instrument cluster.
The brightness signal is calculated in the instrument cluster on the basis of the following values:
- Signal from the phototransistor (ambient luminosity)
- Dimmer signal (on the control panel for the lights)
Last edited by alexz; 04-26-2017 at 01:15 AM.
04-26-2017 | 05:32 AM
#5
Senior Members
Joined: Oct 2009
Posts: 1,380
Likes: 3
From: Indiana, USA
My Ride: 2007 530xi: Sport, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, HD Radio, SAT, Custom NCS coded options 2008 535xi: Sport, Night Vision, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, SAT, Custom NCS coded options, Rear Seat Heat Retrofit, Passport 9500ci
Model Year: 2008
Engine: N54
E60, E61, E63, E64, E81, E87, E90, E91, E92, E93 petrol, diesel, M, ... all have a phototransistor and change with ambient light.
The general brigthness can be adjust manually, but the phototransistor works in parrallel.
newTis.info : Dimming of the instrument cluster.
The brightness of the liquid-crystal display and all indicator and warning lights is adapted to suit ambient lighting conditions. This function is implemented by a phototransistor in the instrument cluster.
The brightness signal is calculated in the instrument cluster on the basis of the following values:
The general brigthness can be adjust manually, but the phototransistor works in parrallel.
newTis.info : Dimming of the instrument cluster.
The brightness of the liquid-crystal display and all indicator and warning lights is adapted to suit ambient lighting conditions. This function is implemented by a phototransistor in the instrument cluster.
The brightness signal is calculated in the instrument cluster on the basis of the following values:
- Signal from the phototransistor (ambient luminosity)
- Dimmer signal (on the control panel for the lights)
Wow... I can't believe this is something I have never noticed. I have my original cluster out of the car, now I want to look for the phototransistor
