Ambco 2500 Operating instructions

Troubleshooting
Suspect Cords and Connections
Set the audiometer to 70dB @ 8000 Hz using the keys marked below
Set the audiometer to steady tone mode by pressing the TONE SELECT button
marked as below
The display of the audiometer should now look like this
Put the headset on as if you were going to take a test, while wearing the
headset have someone press and hold the TONE button marked as above.
Now twist and wiggle the connections of RIGHT (RED) ear phone cord and
patch cord as shown below. You will be checking the RIGHT side first
because the audiometer is set on the right side at turn on, with this in mind you
are listening for any static or intermittent in the tone when the connections are
wiggled and twisted.

Now you will do the same for the LEFT (BLUE) side by first pressing the
RIGHT/LEFT button (marked as above) to change from right to left, now
twist and wiggle the LEFT side cords.
If you hear ANY static or interruption of the tone coming from either ear phone
you will need to spray clean all plugs and jacks. Call AMBCO for instructions.
If you’ve spray cleaned before and the problem persists or returns, all plugs
and jacks SHOULD be replaced with AMBCO gold plated connectors.
GOLD PLATED CONNECTIONS WILL NEVER NEED SPRAY CLEANING!
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To check the patient response push button press and hold the push button, the
green light above RESPONSE will be lit. While observing to see if the green
light flickers, press several times to see if the push button itself is intermittent.
Then twist and wiggle the cord and plugs for the patient response. If needed try
above spray cleaning procedure, or replace parts as necessary.