GAI-Tronics 701-302ICS ICS AC-Powered Page/Party Plug-in Amplifiers - Manual (Page 17)

Pub. 42004-730L2B
ICS AC-Powered Page/Party
®
Plug-in Amplifiers Page: 15 of 20
f:\standard ioms - current release\42004 instr. manuals\42004-730l2b.doc
04/11
Troubleshooting
The following tables are provided to aid qualified service personnel in troubleshooting problems with the
ICS Page/Party
® Replacement Amplifiers.
Table 1. Troubleshooting for All Models (Except as Noted)
Problem Potential Cause
Station not
functional
• Verify incoming supply voltage at TB2 or TB3 on the Termination PCBA.
• Verify regulated 24 V dc at P1 of Termination PCBA. Caution! Supply
voltage present at P2.
Excessive hum or
buzz during
station operation. Inspect the Page/Party ® lines for proper line terminations, shorts, and grounds.
Crosstalk occurs
between
Page/Party
® lines.
• Inspect the Page/Party ® lines for proper line terminations, shorts, and
grounds.
• Inspect the Page/Party ® party line connections for crossing of the cable pairs.
Feedback occurs
during page.
• Check location and orientation of speakers in the area.
• Refer to the “Speaker Mute” section for the applicable model.
Squeal in handset
receiver.
(Not applicable to
speaker amplifier
models.) • Ensure proper termination on Page/Party ® lines.
• Ensure system line balance is connected.
Speaker level is
too low/loud. • Speaker volume potentiometer is not adjusted properly.
• Ensure the nominal page line level is correct.
• Replace the speaker or driver.
Cannot make a
page
(Not applicable to
speaker amplifier
models.) • Check handset (or headset) connections
• Check proper cable terminations between Termination and Main PCBA.
• Check jumper settings or cable connections at P4.
• Replace handset.