X. TROUBLESHOOTING
G228 INSTRUCTIONS
SYMPTOM
POSSIBLE CAUSE
POSSIBLE SOLUTION(S)
No Front Panel
POWER ON In-
dication
•
No AC power present.
Verify the unit is receiving AC power.
Verify the AC outlet has proper AC voltage available.
No Audio
Output:
•
No input signal source. Verify that proper signal/level is being supplied.
•
Incorrect input signal
connection
Verify that the signal input connection is correctly
connected.
•
Incorrect output con-
nections
Check that the proper load is correctly connected to
the desired output terminals.
No Automatic
Muting of
Input Signal
•
Mute Switch Rear
Panel
Check that the switch is in the correct position.
(See page 6).
•
Insufficient MIC/600
ohm/Tel-Page gain
Check MIC/TEL gain control setting.
Check that MIC/TEL audio signal level is sufficient.
Low, High, or
Distorted Level:
•
Volume setting
Check the corresponding gain control on the front
panel.
•
Signal level
Check that adequate input signal level is strong
enough.
•
Input or output imped-
ance not matched
Check that the proper input/output line impedance
matches the selected input/output connections used.
•
Possible low resistance
or shorted wiring across
the audio in and/or
across the speaker out
Check/correct system wiring.
Grommes~Precision is an American manufacturer of original, custom, and private labeled audio/electronic equipment for use in commercial, consumer, and industrial applications since 1946.
Grommes~Precision
Grommes~Precision
847-599-1799 800-SINCE-46 FAX: 847-599-6178
1331 Estes Ave. Gurnee, IL 60031 USA
www.grommesprecision.com
8 of 8
SERVICING
If the unit requires service: 1) Obtain a Return Authorization (RA) Number at 847-599-1799; 2) In-
clude a detailed written explanation outlining the nature of the problem and your contact information;
and 3) Ship pre-paid to Grommes~Precision, 1331 Estes Ave., Gurnee, IL 60031, USA. If the unit is
under warranty, repairs or a replacement will be made in accordance with Grommes~
Precision’s warranty policy.
