Hubbell GAI-TRONICS SmartSeries 701-904 User manual

Pub. 42004-719L2C
G A I - T R O N I C S ®
A H U B B E L L C O M P A N Y
701-904 SmartSeries® Handset/Speaker
Amplifier with Auxiliary Jack
TA B L E O F CO N T E N T S
GAI-TRONICS 3030 KUTZTOWN RD. READING, PA 19605 USA
610-777-1374 ◼800-492-1212 ◼Fax: [phone]
VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
Confidentiality Notice.....................................................................................................................1
General Information.......................................................................................................................1
Product Usage..........................................................................................................................................1
Features and Options..............................................................................................................................2
External Components.............................................................................................................................2
Internal Components..............................................................................................................................3
Block Diagram.........................................................................................................................................3
Interfaces .................................................................................................................................................4
Installation ......................................................................................................................................4
Operation.........................................................................................................................................5
Handset Operation..................................................................................................................................5
Page Announcement .............................................................................................................................5
Party-Line Conversation.......................................................................................................................6
Auxiliary Headset Operation.................................................................................................................6
Page Announcement .............................................................................................................................6
Party-Line Conversation.......................................................................................................................6
Optional Features....................................................................................................................................7
Maintenance....................................................................................................................................7
External Adjustments.............................................................................................................................8
Minimum Level Adjustment.................................................................................................................8
Offset Level Adjustment.......................................................................................................................8
VLC (Volume Level Control) Adjustment (ADVANCE Systems only)..............................................9
Internal Adjustments..............................................................................................................................9
Station Address.....................................................................................................................................9
Handset Receiver and Sidetone Volume Adjustments........................................................................ 10
Troubleshooting....................................................................................................................................11
How to Diagnose Assembly Faults.......................................................................................................12
Replacement Parts................................................................................................................................14
Specifications ................................................................................................................................14
Electrical................................................................................................................................................14
Speaker Amplifier.................................................................................................................................14

Table of Contents Pub. 42004-719L2C
GAI-TRONICS 3030 KUTZTOWN RD. READING, PA 19605 USA
610-777-1374 ◼800-492-1212 ◼Fax: [phone]
VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
SmartVolume™.....................................................................................................................................14
Handset Amplifier.................................................................................................................................14
Mechanical.............................................................................................................................................14
Environmental.......................................................................................................................................15
Approvals.......................................................................................................................................15

Pub. 42004-719L2C
G A I - T R O N I C S ®
A H U B B E L L C O M P A N Y
701-904 SmartSeries® Handset/Speaker
Amplifier with Auxiliary Jack
GAI-TRONICS 3030 KUTZTOWN RD. READING, PA 19605 USA
610-777-1374 ◼800-492-1212 ◼Fax: [phone]
VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
Confidentiality Notice
This manual is provided solely as an installation, operation, and maintenance guide and contains sensitive
business and technical information that is confidential and proprietary to GAI-Tronics. GAI-Tronics
retains all intellectual property and other rights in or to the information contained herein, and such
information may only be used in connection with the operation of your GAI-Tronics product or system.
This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any third
party.
The following are trademarks of GAI-Tronics Corporation:
SmartSeries®
Page/Party®
ADVANCE™
SmartVolumeTM
General Information
The Model 701-904 SmartSeries Handset/Speaker Amplifier with auxiliary jack provides the following
functions:
•one-way page announcements over system speakers
•amplifies broadcast page announcements over the station’s speaker
•party-line (two-way) communication with other system users
•attachment of an auxiliary headset
•control interface for optional devices such as the party line end-of-line module or the SmartSeries
station RTU (remote terminal unit) when installed in a SmartSeries RTU enclosure.
Product Usage
The Model 701-904 SmartSeries Handset/Speaker Amplifier with auxiliary jack is an intelligent
handset/speaker amplifier for use with GAI-Tronics’system cable in either standard Page/Party or
ADVANCE systems.

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Features and Options
•page and party line communication from the
integral handset or an auxiliary headset
•*optional SmartSeries station RTU with
supervision of input and output devices
•ALS (Ambient Level Sensing) automatically
adjusts speaker volume relative to ambient
noise
•*optional party line end-of-line module for
supervision of party line one
•*handset and auxiliary connections (if
equipped) monitoring and control
•*data and audio transmission on the system
cable.
•*local speaker supervision
•*VLC (Volume Level Control) adjust volume
to a predefined level for priority pages
Requires installation in a system with an ADVANCE head end.
External Components
The handset/speaker amplifier assembly includes a handset and cradle (see Figure 1). A hookswitch
(magnetic reed switch) in the cradle signals the appropriate off-hook status to the microcontroller in the
assembly when the handset is removed from or placed in the cradle.
The user level adjustment control is located under the GAI-Tronics nameplate to the right of the cradle.
The Model 701-904 SmartSeries Handset/Speaker Amplifier also contains an auxiliary jack for a No.
10401-201 Headset/Microphone Assembly and a No. 10416-103 Extension Cable.
Figure 1. Front View

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Internal Components
The assembly contains the following internal components or subassemblies (see Figure 2):
•chassis
•front panel attached to the front of the chassis
•handset amplifier/FSK/P PCBA (printed circuit board assembly) (Ref. 15) attached to the rear of the
front panel
•speaker amplifier/power supply PCBA (Ref. 14) attached to the rear of the chassis, with a plug (P1)
at the top, pointing to the rear
Figure 2. Side View
Block Diagram
The P1 connector on the back of the speaker amplifier/power supply PCBA plugs into a socket in an
enclosure connected to the system cable, accessing the Page/Party lines and ac power (see Figure 3). The
speaker amplifier/power supply PCBA contains the low voltage power supplies and the speaker amplifier
circuitry.
Connector J1A and J1B on the speaker amplifier/power supply PCBA connects regulated +5 V dc, +/−15
V dc, and V RLY voltages along with control, monitoring, and line signals to J1A and J1B on the handset
amplifier/FSK/P PCBA. Connector J2 of the speaker amplifier/power supply PCBA connects to
optional external devices.
The handset amplifier/FSK/P PCBA has connections to the handset and the hookswitch via spade
terminal connectors E1 through E7 and connections to the optional front panel auxiliary connector via
J4.

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Figure 3. Block Diagram
Interfaces
The assembly connects to the system cable, an external loudspeaker, and any auxiliary devices via the 16-
pin connector, P1, located on the speaker amplifier/power supply PCBA. Connector J2, on the bottom of
the speaker amplifier/power supply PCBA connects to optional devices such as the SmartSeries RTU
(remote terminal unit) installed in specially designed enclosures. Other connections on the speaker
amplifier/power supply PCBA provide quick connect/disconnect of subassemblies.
All connections to the system cable must be made by qualified installation technicians. Direct questions
about these connections to GAI-Tronics’Field Service Department at 800-492-1212 inside the USA or
610-777-1374 outside the USA.
Installation
CAUTION
—Do not install this equipment in hazardous areas other than those indicated on
the approval listing in the Approvals section of this manual. Such installation
may cause a safety hazard and consequent injury or property damage.
WARNING
—Do not disconnect equipment while energized.
The Model 701-904 SmartSeries Handset/Speaker Amplifier with auxiliary jack assembly plugs directly
into any standard GAI-Tronics 700 series enclosure. It also plugs into the following specialized
SmartSeries enclosures:
•SmartSeries station RTU enclosure
•EPL (Emergency Party Line) enclosure
•EOL (End-of-Line) party-line module enclosure
1. Connect the 10-conductor keyed ribbon cable to J2 on the bottom of the speaker amplifier/power
supply PCBA with the red trace on the ribbon cable edge lined up with J2, pin one.

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This is required when these amplifiers are installed in a SmartSeries enclosure.
NOTE:Do not damage the protruding latch wings of connector J2 located on the bottom edge of the
amplifier during installation.
2. Configure the station address (see the Station Address section).
3. Ensure that connector P1 mates securely with the receptacle in the enclosure and then tighten the four
screws at the corners of the amplifier’s front panel.
4. Make all necessary audio level adjustments (see the External Adjustments and Internal Adjustments
sections).
5. For SmartSeries installations in an ADVANCE system: Configure the station address (see the Station
Address section).
Operation
This section describes the operation of the SmartSeries Handset/Speaker Amplifier with Auxiliary Jack
with either the handset or the auxiliary headset, if equipped. Operation of this unit is dependent on the
system type where it is installed. The amplifier acts as a standard Page/Party amplifier with ALS
functionality when installed in a No 700 series enclosure in a Page/Party system. All optional functions
are available when installed in a SmartSeries enclosure in an ADVANCE system.
Note regarding the busy tone: A busy tone is heard in the receiver when either of the following occurs:
•a page of a higher priority is in progress
•a page is attempted within one second of a previous page
Handset Operation
The handset allows the user to make page announcements and conduct party-line conversations.
Page Announcement
To make a page announcement:
1. Lift the handset from the cradle.
2. Select an available party line using the five-position rotary selector switch if party-line conversation
is desired.
3. Press the handset pressbar.
4. Make your announcement when the wait tone stops. If the page resource is already in use, you hear a
busy tone. Release the handset pressbar, then try again.
5. Release the handset pressbar.
6. When the party answers conduct your conversation.
7. Replace the handset in the cradle at the end of the conversation.

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Party-Line Conversation
To conduct a party-line conversation perform the following steps:
1. For a multi-party enclosure select the appropriate party line.
2. Lift the handset from the cradle.
3. Conduct your conversation.
4. Replace the handset in the cradle when the conversation is finished.
Auxiliary Headset Operation
The auxiliary headset allows an operator to make page announcements and conduct party-line
conversations hands-free, up to 30 feet from the station, while providing noise reduction for hearing
protection. When an auxiliary headset/cable assembly is plugged into the auxiliary jack, a party-line
connection is automatically established (the same as lifting the handset).
NOTES:
•Allowing the auxiliary headset to remain plugged in for a long period of time may disable party-line
communication. This condition is controlled by the off-hook time-out setting, which can be
programmed for 1 to 25 minutes in 1-minute steps (the factory default is 8 minutes) or it can be
disabled. This feature ensures that a station unintentionally left connected to a party line will not
induce unwanted background noise onto the party line. If party-line communication is disabled,
unplug the auxiliary headset, then plug it back in.
•The auxiliary headset has priority over the handset. When the user lifts the handset from the cradle
while the auxiliary headset is in use, the handset’s microphone and page switch are disabled, but the
handset receiver remains active.
•This application requires the GAI-Tronics 10401-201 Headset/Microphone Assembly and 10416-103
Extension Cable.
Page Announcement
To make a page announcement for a party-line conversation, perform the following steps:
1. Plug the auxiliary headset/cable assembly into the auxiliary jack on the front panel.
2. Press the headset page switch.
3. Make your announcement when the wait tone stops.
If the page resource is already in use you hear a busy tone. Release the headset page switch, then try
again.
4. Release the headset page switch.
5. When the party answers, conduct your conversation.
6. Unplug the auxiliary headset/cable assembly when the conversation has ended.
Party-Line Conversation
To conduct a party-line conversation, perform the following steps:
1. For a multi-party enclosure, select the appropriate party line.
2. Plug the auxiliary headset/cable assembly into the auxiliary jack on the front panel.
3. Conduct your conversation.
4. When you are finished, unplug the auxiliary headset/cable assembly.

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Optional Features
The following features are available as options to the standard configuration of a station used in an
ADVANCE system and installed in a standard SmartSeries or a custom enclosure. These features can be
configured. Contact the GAI-Tronics Field Service Department at 800-492-1212 inside the USA or 610-
777-1374 outside the USA for further information about these features.
•The selected page destination feature allows the manual selection of one of four paging destinations.
•The supervised input feature allows the monitoring and supervision of one or two initiating device
circuits (IDCs), initiating an alarm when the supervised device is activated.
•The power relay module provides a relay contact output, typically to switch power to a visual
signaling device, for directed or relay group operation. Supervision of the controlled device’s cable
can also be enabled.
•The station emergency party line feature supports annunciation for two party lines.
Maintenance
Contact a Regional Service Center for assistance if the equipment requires service or spare parts. A
return authorization number (RA#) will be issued if service is required. Equipment must be shipped
prepaid to GAI-Tronics with a return authorization number and a purchase order number. Repairs or a
replacement will be made in accordance with GAI-Tronics’ warranty policy if the equipment is under
warranty. Please include a written explanation of all defects to assist our technicians in their
troubleshooting efforts. Call 800-492-1212 inside the USA or 610-777-1374 outside the USA for help
with identifying the Regional Service Center closest to you.
WARNING
—Remove all power from the station before performing any of the following
preventive maintenance steps.
1. Inspect and replace frayed or cracked wiring.
2. Secure/replace loose wires and spade terminals.
3. Remove corrosion from terminals.
There are three replaceable fuses (F1, F2, and F3) mounted on the Speaker Amp/Power Supply PCBA
(see Figure 2).
•Fuse F1 protects the low voltage power supply circuits. Replace with GAI-Tronics part number
51801-027.
•Fuse F2 protects the current to the speaker amplifier. Replace with GAI-Tronics part number
51801-003.
•Fuse F3 limits the amount of current to any external device connected to J2. Replace with
GAI-Tronics part number 51801-024.

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External Adjustments
The user level adjustment control is located on the front panel behind the GAI-Tronics nameplate (see
Figure 1).
1. Loosen the two screws on the GAI-Tronics nameplate and rotate it counterclockwise to access the
adjustment hole.
2. Insert a 1/8-inch flat blade screwdriver through the access hole and into the potentiometer located
directly behind the hole to adjust the level.
Use the user adjustment control potentiometer to make three separate adjustments:
•minimum speaker amplifier output level setting
•offset amplifier level (difference between the ambient noise and the amplifier output levels)
•VLC (volume level control) adjustment (sets a preset speaker level to override the normal volume
control setting).
Minimum Level Adjustment
The factory default setting for minimum level is 4.0 watts nominal. To set the minimum amplifier output
level:
1. Loosen the two screws on the GAI-Tronics nameplate and rotate it counterclockwise.
2. Insert a 1/8-inch flat blade screwdriver through the access hole and into the potentiometer.
3. Turn the user adjustment control fully counterclockwise.
4. Listen for a single beep from the speaker indicating the speaker amplifier is in the minimum level
adjustment mode.
If the page line is in use immediately after the beep tone is heard: use the page signal as the reference
to adjust the speaker volume level.
If the page line is inactive following the beep tone: a continuous tone is activated to make the
minimum level adjustment. All page line activity is ignored until completion of the adjustment once
the tone is activated. Use the test tone as a reference to adjust the speaker amplifier output level to
the desired volume.
5. Turn the adjustment potentiometer clockwise for the desired output.
The test tone automatically shuts off 5 seconds after the last adjustment.
Offset Level Adjustment
The offset level allows the output of the SmartVolume™ speaker amplifier to maintain a set difference or
offset between the ambient noise level and the speaker output level.
1. Loosen the two screws on the GAI-Tronics nameplate and rotate it counterclockwise.
2. Insert a 1/8-inch flat blade screwdriver through the access hole and into the potentiometer.
3. Turn the user adjustment control fully clockwise.
4. Listen for two beep tones indicating that the station is in offset adjustment mode.
If the page line is in use immediately after the beep tone is heard: use the page signal as the reference
to adjust the speaker volume level.
If the page line is inactive following the beep tone: a continuous tone is activated to make the
minimum level adjustment. All page line activity is ignored until completion of the adjustment once