Frequently Asked Question

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Please use this form to contact Tek-Tone Technical Support for help with your existing TekTone system.

Or you can call 800.327.8466, between the hours of 8:00 a.m. and 5:30 p.m. EST Monday through Friday to speak with a member of our Technical Support department.

Before you call us, you need to know:

• The product's model number. (AM612 Series Entrance Panel)
• Is this a new installation, or are you servicing existing equipment?
• When did the issues begin?
• Were there any incidents prior to the current issue(s)?
• Your name, phone number and company name.
• The job site name and address.

For technical assistance, contact our Tech Support team. Hours are: 8:00am to 5:30pm EST Monday through Friday.

Troubleshooting Tektone Apartment Intercom System

Entire System Dead
If power LED is not illuminated, check for 16 VAC at transformer secondary and 120 VAC at transformer primary. If LED is illuminated, review field wiring and perform direct test using one of the apartment stations to eliminate field wiring.

No Talk
Check wiring to terminals 1 and 2, and check whether wiring to entrance panel speaker is shorted or open. Suite station can be swap tested with another working unit.

No Listen
Check wiring to terminals 1 and 3, or for short between terminals 1 and 2. Check to see if wiring to entrance panel speaker is shorted or open. Suite station can be swap tested with another working unit.

No Door Operation
Check wiring to door release for shorts and opens, or for defective door release. Confirm that shunts are properly set for door release type and that connections to appropriate output have been made. Check wiring to terminals 2 and 3, or 1 and E (depending upon suite station type).

No Call Tone
Check wiring to terminal Z or ZW to entrance panel, related entrance panel call buttons, and suite station X terminal. Suite station can be swap tested with another working unit. Excessive Hum or Distortion Check whether wiring is installed too close to electrical wiring or electrical devices; amplifier installed too close to transformers or other electrical devices; twisted pair wiring not used as required; or amplifier voice volume set too high.

Radio Interference
Connect G terminal from amplifier to electrical ground. Note: This connection is not shown on the wiring diagram, since the situation is not always improved by adding it. If the problem persists, consult the factory or service representative.

Oscillation (feedback or howling)
Reduce the voice volume until oscillation is eliminated. If oscillation stops when the call tone wire is removed from ZW, set entrance tone (SW3) to the OFF (left) position.

Signal Flow and Theory of Operation for PK543A Amplifier and Apartment Intercom System
The following example describes an apartment intercom system using a PK543A in conjunction with a 4-wire suite station. Refer also to Figure 5 on page 8.

Call Button
Pressing a suite station call button on the entrance panel routes the call tone from the Z or ZW terminal on the PK543A to the X terminal (tone in) on the associated suite station. This signal then passes through the speaker and returns to the PK543A via the 1 terminal (audio common). If the warble tone is in use and the entrance tone feature is active, the tone will also be heard through the entrance panel speaker when the call button is pressed.

Talk Button
Pressing the talk button at a suite station connects the suite station’s internal speaker to terminals 1 and 2 of the PK543A, which serves as an audio input to the amplifier. The audio is then amplified and sent to terminals A and G, which are connected to the entrance panel’s speaker (speaker mode).

Listen Button
Pressing the listen button at a suite station connects the suite station’s internal speaker to terminals 1 and 3 of the PK543A, which serves as an audio output from the amplifier. This allows the suite station to receive the amplified audio being received by the amplifier on terminals A and G from the entrance panel speaker (microphone mode).

Door Button
Pressing the door button at a suite station creates a closure between terminals 2 and 3 on the PK543A. This state is sensed by the amplifier and causes the door release to be activated (output specifics are based on PK543A settings). This state is also triggered by shorting terminals 1 and E as is typically done by a postal lock.

Tek-ENTRY Apartment Entry Installation Manuals

Tek-ENTRY PK543A - Apartment station amplifier/power supply (5, 4 & 3 wire) - IL826
Tek-ENTRY PK502B - Dual Entrance Transfer Relay - IL499
LI404B - ADA apartment strobe for hearing impaired - IL554
PK124 - Battery charger - IL426

Tek-ENTRY Apartment Entry Spec Sheets

(PDF Format; Click onto view a product photo)
Tek-ENTRY - Submittal Package (all spec sheets)
AM612 - Name holder entrance panels - IL525
IR103E IR104E & IR105E - Apartment stations, flush mount, plastic plate - IL486
IR203E IR204E & IR205E - Apartment stations, surface mount, plastic plate - IL233
IR207B - Apartment station, 4-wire, flush mount, stainless steel - IL183
PK124K - Battery backup kit - IL818
PO001 SS102A & SS106 - Transformers and electric door opener - IL127
PK543A - Apartment station amplifier/power supply (5, 4 & 3 wire) - IL482
PK502B - Dual Entrance Control Unit - IL955
LI404B - ADA apartment strobe for hearing impaired - IL544
PO101S - Postal Release Panel, surface mount - IL593
PK601A - Power supply for BE007, LI404B, PK205, PK612A - IL420
Frame and Housing Reference Chart - IL312

Tek-ENTRY Apartment Entry Architects' & Engineers' Specs

(WORD Format)

AM192/AM492 Apartment Entry System with Speaker Station & Door Release (1-24 units)

AM193/AM493 Apartment Entry System with Handset Remote & Door Release (1-24 units)

CM192/CM492 Apartment Entry System with Speaker Station & Door Release (28+ units)

CM193/CM493 Apartment Entry System with Handset Remote & Door Release (28+ units)

Tek-ENTRY Apartment Entry TekTips

Testing procedures for the IR104C and IR204B 4-wire apartment stations
Testing procedures for the IR102B Apartment Stations with TALK:LISTEN button
IR102B Apartment Intercom Station testing procedures
Guidelines for Intercom Amplifier Placement
Troubleshooting the IR104B Apartment Station and the PK543 Amplifier
Care and maintenance of AM and CM Series Entrance Panel push button switches
Troubleshooting a two-entrance apartment intercom system
Correcting buzzing in apartment intercom stations
PK124 Battery Charger wiring tip
Current Capability LI404B with +24VDC power source
Troubleshooting intercom systems
Common Sense Troubleshooting- Ohming Speakers
PK543 Amplifier Field Test