Specifications

Section 6 — Troubleshooting and Repair
6.1 Common Problems and Possible Solutions
Problem: The DAI-2 does not power up.
Solutions: Check for shorts on the flat (ribbon) cable. There should be 12VDC on pin 5. Check the wall-plug power
supply for 12 VDC.
Problem: I reprogrammed the command matrix but my changes do not seem to have any effect.
Solutions: Use the programming read mode to make sure that you have made the changes that you think you
have. If the data is correct, make sure that the user command set has been activated--address 358.
This address is factory programmed with 3. Reprogram it to 0 to activate the user command set.
Problem: I changed (either) security code and now I can’t remember it. How do I access the system?
Solutions: Place a call to the DAI-2 while at the rear panel of the DAI-2. When you hear a ring, press the button
labeled ‘Connect’ on the DAI-2. The DAI-2 will answer and the telephone will stop ringing but nothing
else will happen. Enter ❊❊❊❊ to activate the DAI-2. It will beet two short beeps to confirm that you are
online. You now have 10 seconds to enter the programming mode and read the security code. Enter ❊ -
7 to enter programming read mode. The DAI-2 will beep twice to confirm that you have changed modes.
If you need to check the main security code, enter 316. If you need to check the programming security
code, enter 324. Again, the DAI-2 will beep twice. Press the # key. The DAI-2 will beep a number of
times corresponding to the first digit of the security code. Press the # key seven more times to read the
next seven digits--the code is eight digits max. A long single tone represents zero. Ten short tones
represents a blank space. If you read a blank space before reading eight digits, stop. Digits after the
blank space are ignored. Enter ❊ -❊ to exit the programming mode.
Problem: The DAI-2 is switching relays, etc. by itself. It appears to be receiving false DTMF tones but now keys
were pressed.
Solutions: Either the program audio has DTMF tones in it or the program content has phantom DTMF tones--sounds
that appear exactly like DTMF tones to the detector. (While this is rare, it does happen.) Increase the
DTMF hold time at address 349. This setting controls the amount of time that a tone must be present
before the DAI-2 responds. Keep in mind that this adjustment also effects the amount of time that you
must press the keys on the telephone to control the DAI-2.
Problem: There is noise (hum) on the telephone line that is interfering with my ability to control the DAI-2.
Solutions: The DAI-2 contains internal protection against RF energy. Additional protection may be necessary in
installations near a broadcast transmitter. Keep the telephone line as short as possible. Install an RF
filter at the telephone "Line" jack near the DAI-2. Loop the ribbon cable through a ferrite core near the
DAI-2. On newer models the ribbon cable is quite short and this should not be a cause of interference.
DAI-2 Troubleshooting and Repair page 6. 1