Philips Vari-lite VL3500 Wash FX Luminaries, Service Manual

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T
ESTING
: A
UTO
R
ECALIBRATION
0 2 . 9 6 8 6 . 0 0 1 0 A 13
2
Auto Recalibration
Most mechanisms with sensors will check their sensor when at a zero position, if the sensor is not
detected within 3 seconds, the mechanism will recalibrate. This applies to all except pan and tilt, and
zoom. Pan and tilt are corrected continuously if required by encoders fitted to the motor shaft.
Note: Colors (CTO and CYM) only auto recalibrate when the dimmer has been closed for 3 seconds.
Partial Recalibration
It is possible to recalibrate sections of the luminaire from a console. This allows greater flexibility and
speed by only forcing a recalibration on specific mechanisms. Partial recalibration values (on the
control channel) are as follows:
• Hold DMX value 102 for 3 seconds then 0 recals: Strobe, Color Wheel 1, Color Wheel 2, CYM,
CTO, and Dimmer.
• Hold DMX value 128 for 3 seconds then 0 recals: Zoom, Dimmer, Aperture, and Internal Lenses.
• Hold DMX value 140 for 3 seconds then 0 recals Dimmer and Strobe.
Sensor Testing
Most mechanisms within the VL3500™ Wash Luminaire are equipped with either optical or magnetic
sensors. The VL3500™ Wash master control board (MCB) has labeled test points for reading DC
voltages at each sensor. Testing is best performed with a digital voltmeter for sensor readings or an
Oscilloscope for pan/tilt encoder readings. The values can be used to determine whether a circuit is
opening correctly or needs further troubleshooting.
Guidelines:
• The values will change depending on whether the sensor reading is Open or Closed.
• The values will be different depending on the type of sensor: optical or magnetic.
• As a general rule, if a change occurs from 5v to 0v or visa versa, then it is working.
• An Open reading occurs when the sensor is not aligned - tab not at sensor (typically a non-zero
DMX value).
• A Closed reading occurs when the sensor is aligned -tab in or at sensor (typically a zero DMX
value).
• Optical sensors read high when the sensor is Closed.
• Magnetic sensors read Low when the sensor is Closed.
• High value - 5 volts (typically 4.9 volts).
• Low value - 0 volts, or up to approximately 0.2 volts.
Notes regarding specific mechanisms: