AA400PHD - Receiver ATLAS - Free user manual and instructions

Product Type	AV Receiver
Brand	Atlas
Model	AA400PHD
Dimensions (W x D x H)	430 mm x 310 mm x 100 mm
Weight	5.0 kg
Power Supply	AC 100-240V, 50/60Hz
Power Consumption	50 W (standby: 0.5 W)
Audio Output Power	100 W per channel (4 ohms, 1 kHz, 1% THD)
Supported Audio Formats	Dolby Digital, DTS, PCM
Video Inputs	3x HDMI, 2x Composite, 1x Component
Video Outputs	1x HDMI (ARC), 1x Composite
Radio Tuner	FM/AM with 30 presets
Remote Control	Included (IR)
Speaker Impedance	4-8 ohms
Frequency Response	20 Hz - 20 kHz (±1 dB)
Signal-to-Noise Ratio	≥ 90 dB
Total Harmonic Distortion	< 0.08%
Bluetooth Version	4.2 (A2DP, AVRCP)
USB Port	1x USB 2.0 (for media playback)
Cleaning Instructions	Wipe with a dry cloth; do not use liquid cleaners.
Safety	Do not expose to moisture; unplug during storms.
Spare Parts Availability	Remote, power cord available from Atlas service.
Repairability Score	7/10 (modular design, some parts replaceable)

Frequently Asked Questions - AA400PHD ATLAS

How do I connect the receiver to my TV?

Use an HDMI cable from the HDMI output (marked ARC) to your TV's HDMI input. Ensure both devices are powered off during connection.

Why is there no sound from the speakers?

Check that speakers are properly connected and the receiver is set to the correct input source. Also verify that the volume is not muted.

Can I use the receiver with Bluetooth headphones?

Yes, the receiver supports Bluetooth audio streaming. Pair your headphones by pressing the Bluetooth button on the remote and selecting the device.

How do I reset the receiver to factory settings?

Press and hold the 'Power' button on the front panel for 5 seconds until the display shows 'RESET'. Confirm with the 'OK' button.

What is the maximum power output per channel?

The receiver delivers up to 100 watts per channel into 4 ohms with 1% THD. Actual output may vary based on speaker impedance and load.

Does the receiver support 4K video passthrough?

Yes, all HDMI inputs and the output support 4K (60 Hz) and HDCP 2.2, allowing passthrough of Ultra HD content.

How do I set up the FM radio?

Connect the included FM antenna, press the 'Tuner' button, and use the 'Scan' function to auto-search stations. Store favorites using the 'Preset' button.

The remote control is not working. What can I do?

Replace the batteries with fresh ones. Ensure no obstructions between the remote and the receiver's IR sensor. If still not working, contact support.

Can I play music via USB?

Yes, insert a USB flash drive with MP3, WMA, or FLAC files into the USB port on the front panel. Select 'USB' as the input source.

Where can I find spare parts or repair service?

Contact Atlas customer service or visit our website. Common parts like the remote, power cord, and feet are available for purchase.

USER MANUAL AA400PHD ATLAS

AAPHD Amplifier Impedance Diagnostic Test Example

EXAMPLE

SAFE LOAD-- TapsettingsOKfor ratedampwattage

EXAMPLE

LOAD FAULT-- WrongTapsetting

EXAMPLE

LOAD FAULT-- Tapsettingsexceed ratedampwattage

EXAMPLE

LOAD FAULT-- ConduitandStaple Shorttoground

graph TD
    A["COM74V"] --> B["+"]
    B --> C["ERROR"]
    C --> D["+"]
    D --> E["COM"]
    E --> F["COM"]
    F --> G["COM"]
    G --> H["COM"]
    H --> I["COM"]
    I --> J["STAPLESHORT"]
    J --> K["ERROR"]
    K --> L["STAPLESHORT"]
    L --> M["LED ON TEST FAIL"]
    L --> N["PHD TEST"]

Atlas Sound

1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.

Telephone: [phone] • Fax: [phone]

AtlasSound.com - 1 -

Overview:

The AAPHD Series features a patent pending Amplifier Diagnostic Test System. The "Push Hear Diagnostic" (PHD) test is simple to use and very effective in testing for speaker wire and load impedance faults in 70.7V systems. The PHD circuit can be activated using a small tool with a point to access the momentary switch through the hole on the front panel. This test circuit produces a test tone over the speakers analyzing multiple conditions to assure the amplifier is wired and loaded properly.

Application Example Description:

Application Example Description: This example illustrates an AA50PHD amplifier connected to a 70.7V speaker system with various tap settings, or load conditions, and how the PHD fault indicator responds.

Example 1: Shows six Atlas FAP series 70V speakers wired in parallel. Two speakers have 4-watt tap settings and four speakers have 8-watt tap settings resulting in a total of 40-watts, a “safe” load to the amp. The total power taps selected on all speakers combined should not exceed the amplifier’s maximum power rating or a fault may occur.

Example 2: Shows the same speaker setup but with one speaker mistakenly tapped at 8 Ohms. This low impedance setting will cause a Fault condition for the system. When testing, this speaker with the wrong Tap setting will be very loud compared to the rest of the speakers.

Example 3: Shows the same speaker setup with speaker settings tapped so that the total power exceeds the power rating of the amplifier by a significant amount.

Example 4: Shows the same speaker setup with two "short" conditions that can occur during installation, a staple over the wire and a conduit short.

Benefits:

• Automated Impedance Diagnostic System Test
• Easily Test Speaker Loads After Installation without additional Test Equipment
• Avoid Most Common Amplifier Failures
• Reduce Service Calls
• Provide Confidence on Large Installs

PHD Front Panel LED Limit Indicator Functions:

1. Load Fault Indicator - When testing the system using the PHD feature for proper wiring and amplifier loading, this LED will illuminate Yellow if a fault is sensed in the audio speaker system.
2. Excessive Current Draw - Will illuminate Yellow when the amplifier is consuming excessive current. The most likely cause for the fault is an incorrect load impedance connected to the amplifier. The LED will not be constantly illuminated if a proper load is applied.
   Note: An occasional LED flash is okay during standard operation. When the LED is illuminated audible distortion may be heard at the speakers.

Application Example Notes:

1. Make sure no people are present or near speakers during the diagnostic test without taking proper precautions against hearing damage. The SPL can be excessive depending on the tap settings and sensitivity of the speakers.
2. Turn the level control "Off" (fully counter clockwise) before pressing the PHD switch and initiating the test. If the test passes, adjust the level according to application required.
3. Enlisting the assistance of another person to walk the area being tested to listen to the speakers during the test can quickly identify an incorrect tap setting (one speaker is louder than others).

Atlas Sound

1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.

Telephone: [phone] • Fax: [phone]

AtlasSound.com - 2 -