Pub. 42004-114M
Model 7265-101 Multi-Party Desktop Subset
Page 3 of 4
f:\standard ioms - current release\42004 instr. manuals\42004-114m.doc
04/13
Maintenance
The following adjustments are accessible through the rear chassis of the amplifier using a small standard
screwdriver:
Microphone Gain
: adjusts the gain level from the microphone signal to the page or party lines
Receiver Sidetone
: the amount of signal transmitted from the microphone to the receiver of a handset
Receiver Volume
: adjusts the gain level from a party line to the receiver
CAUTION
Desktop subsets are susceptible to strong magnetic forces. If magnetic forces
are placed close to the subset, an on or off-hook condition may occur.
Troubleshooting
The following table lists some hints to aid technicians in troubleshooting:
Problem
Solution
Integral speaker level requires
adjustment.
1. Adjust the volume control on the front of the subset.
2. Adjust the speaker volume control at the amplifier.
Outgoing conversation level
requires adjustment.
Adjust the microphone gain at the amplifier.
Station stays on-hook or off-
hook.
The reed switch may be defective. Test the reed switch for
continuity by connecting an ohmmeter to the reed switch connector.
Place the receiver portion of the handset into the cradle of the reed
switch. The circuit should be closed. Remove the handset from the
cradle. The circuit should be open.
Incoming conversation level
requires adjustment.
Adjust the receiver volume control at the amplifier. Refer to the
applicable amplifier manual.
Feedback/distortion (a hum or
buzz on the line) occurs during
all Page/Party
®
station
operation.
1. Adjust the receiver sidetone at the amplifier.
2. The line may be improperly terminated. Inspect the system
cable for loose connections, shorts, and grounds. Line balance
assembly connections are critical.
Feedback occurs during paging
only.
Use the muting feature in the amplifier enclosure at the terminal
blocks. (Connect the violet wire at terminal 8 to terminal 7.)
Sidetone (hearing one’s own
voice in the receiver of the
handset) requires adjustment
1. Adjust the receiver sidetone at the amplifier. Refer to the
applicable amplifier manual.
2. Check the system cable connections to the resistors in the line
balance assembly are properly terminated.
Crosstalk occurs.
One or more system cable pairs may be improperly terminated.
Visually inspect the system cable connections for accidental crossing
of the cable pairs or grounds.
Miscellaneous
A defective handset/speaker amplifier printed circuit board assembly
(PCBA) can cause numerous problems. If the Page/Party
®
station is
not functioning properly, it may be worthwhile to try replacing the
handset/speaker amplifier.
