Instrument cluster illumination function - GF54.30-P-2007S
Model 215, 220
Diagram showing illumination regulation
Illumination of instrument cluster:
The instrument cluster (A1) illumination is switched on automatically when the instrument cluster is activated. Owing to the "black-screen" technology, details on the instrument cluster (A1) (displays, gauges, etc.) do not become clearly visible until the unit is illuminated. The instrument cluster is activated by opening the driver's door, for example, or by pressing the reset button.
The brightness of the lighting depends on:
- the ambient brightness
- the setting of the instrument, switch and controls illumination dimmer (A1r1)
The diagram shows the dependency of the instrument cluster lighting brightness on the ambient brightness and the setting of the instrument, switch and controls illumination dimmer (A1r1):
- With curve (a), the instrument, switch and controls illumination dimmer (A1r1) is set all the way to the right (maximum). As the ambient brightness increases, so does the brightness of the instrument cluster lighting. The possible brightness ranges from (a-min) to the maximum value (max).
- With curve (b), the instrument, switch and controls illumination dimmer (A1r1) is set all the way to the left (minimum). As the ambient brightness increases, so does the brightness of the instrument cluster lighting. The possible brightness ranges from (b-min) to the maximum value (max). The maximum value (max.), however, is only reached when the ambient brightness is greater.
When the instrument cluster (A1) is activated, the illumination is always set to at least the minimum level (b-min). Lower levels of illumination are not available.
As is evident from the diagram, changing the dimmer for instrument, switch and controls illumination (A1r1) also changes the minimum value from (a-min) to (b-min) or vice versa.
Photo transistor
The instrument cluster (A1) is equipped with a phototransistor to allow the lighting to be adapted automatically according to the ambient brightness. It is located under the fuel level and reserve gauge (A1p2).
| Instrument cluster (IC), location / task | GF54.30-P-3039S |