Checking If An Optical Switch Board Works; Checking If The Light Sensor Works - Siemens NIC2-2 Troubleshooting Manual

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NIC2-2 · Network ID Camera

lower lines are not parallel it is because the left and right side of the mirror are not adjus-

ted properly relative to each other.

• When the projected frame is rectangular and the size is adjusted to the frame on the

paper, tighten the screws that holds the exposure unit to the base plate, tighten the

screws that holds the mirror, carefully as the mirror may tilt when doing so. Check that

the adjustment is still OK.

• Press Sift+F1/Adjust again to close the open cassette and to switch the exposure dis-

play off. Put the baffle back and tighten the screws that holds it. Close the cover of the

camera and mount the two screws that holds the cover.

• Make an exposure to make sure that everything is OK.

5.3 Checking if an optical switch board works

Three optical switch boards are used in the camera. Two have one optical switch mounted

and one have two optical switch. They are all used for the cassette sensor described in the

previous chapter but the board with two optical switch are also used for the pulse counter.

The pins in the connector of the optical switch board are used at follows.

The pin marked single are on all three optical switch boards used to detect the status of the

sensors while the pin marked double is used for the pulse counter detector.

When nothing is inserted in the gap of the optical switch the voltage between GND and the

output (Double or single) should be less then 0.5V. When something is inserted breaking

the light the voltage should be more then 3V. Note that an ordinary paper will not break the

light. The IR light will go through the paper. Best to use is a piece of metal, for example a

piece of aluminum foil. Also, check the plastic cover of the optic sensors that it is not broken.

Use a multimeter to messure the voltage between "Signal" and "GND". The signal voltage

should be aboult 1 - 2V in normal daylight. Cover the sensor and the voltage should drop

and if the light intensity increases the voltage should rise.

Triacon AB Sweden

GND

+5V

Signal

Publication no. 201102

September 2003

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