ID-O-Matic II Manual
02/27/2010
Page 12 of 14
Troubleshooting:
Symptom
Check this:
No green LED with power applied
•
5V DC from IC pin 5 (GND) to pin 14 (+5)?
•
Chip inserted backward?
•
U1 & one of the 2N7000s exchanged?
•
Crystal damaged by excessive heat
•
R1 shorted to ground – check for 5V across RESET pads
No sound from speaker / No audio to
transmitter
•
Adjust audio levels using trim pots
•
U3 in backward
•
R10 shorted to ground
LED blinks and turns RED as soon
as power is applied
ID delay time set to zero. Try hitting ENTER repeatedly as you
apply power or reset by momentarily grounding J1-6.
No version notice when power is
applied
•
Possible serial communication issue (see below).
•
Q2 bad.
•
R5 open or shorted.
Version notice appears, but the ID-
O-Matic II won’t respond when you
hit ENTER a number of times
•
Possible serial communication issue (see below).
•
Q1 bad.
•
R8 open or shorted.
No voltage on J1-3 or J1-4
These are active low, open-drain outputs. See instruction manual.
Use a pull-up resistor if needed.
Support:
Should you need support, have questions, have feature requests or bug/problem reports, please feel free to
contact me via email at [email protected]. I will make every effort to respond as quickly as
possible. Documentation and troubleshooting information can be found at
http://www.HamGadgets.com.
Warranty:
All parts are guaranteed against defects for 90 days from date of purchase. This warranty does not cover
damage due to incorrect assembly, improper soldering or wiring, overvoltage, static damage or other
misuse or abuse. If you have problems, please contact me via email to arrange for an exchange or
replacement part. If you accidentally damage a part, don’t panic – just contact me, replacements are not
expensive.
