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Troubleshooting Guide
If the operation of a component is in doubt, substitute a known-good
component and retry the system. Always verify wiring against wiring
diagrams before powering up the system.
All LEDs are on and the beeper is on: Usually an indication that the
reader's voltage is too low. This may be caused by having the wrong
reader voltage selected at the microcontroller or too long a cable between
the reader and the microcontroller.
1.
Measure the reader supply voltage at the microcontroller. It should
read between 12V and 15VDC. If the voltage is correct, continue to
step 2 below. If the voltage is incorrect, refer to the appropriate
microcontroller manual and correct the voltage.
2.
If the problem is still present, while in low power mode, measure the
voltage between JP2 pin 1 (power) and JP2 pin 2 (ground). This
voltage should be greater than 9VDC and less than or equal to the
reader supply voltage. If the voltage is too low, correct the wiring. If
the voltage is correct, replace the reader.
None of the LEDs are on: Present a known-good MIFARE
the reader while listening for the beeper.
If the beeper sounds, the reader is faulty and should be replaced. If the
beeper does not sound, check the following:
•
Power connections to the reader
•
Reader supply voltage at connector JP2 pin 1
The green LED is always on: The green LED indicates that the door strike
is open. It is controlled by the input on connector JP2 pin 3.
1.
Disconnect the wire on JP2 pin 3. If the green LED stays on, the reader
is faulty and should be replaced. If the green LED goes off, then the
problem is most likely not in the reader.
2.
Reconnect the wire on JP2 pin 3 and measure the voltage at JP2 pin 3.
Low voltage turns on the green LED. If the voltage is low, check to see
if the host system is energizing the door strike.
Model 840/845 Contactless Smart Card Reader
®
1 type card to
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