KD-FIX418A-2 - Audio/video converter Key Digital - Free user manual and instructions

Product Type	Audio/Video Converter (HDMI Connectivity Repair and Audio De-embedding)
Brand	Key Digital
Model	KD-FIX418A-2
Dimensions (Product)	3.78 x 2.52 x 0.93 in (94 x 64 x 23.5 mm)
Weight (Product)	5.4 oz (152 g)
Power Supply	5V/1A (5W) DC, screw-in type, model SK01T-0500100Z
Enclosure	Black metal
HDMI Bandwidth	Up to 18 Gbps (TMDS)
Video Resolution Support	SD, HD, VESA up to 4096x2160p (4K) at 60Hz 4:4:4
HDR Support	HDR10, Dolby Vision
HDCP Compliance	HDCP 2.2 and previous
Audio De-embedding	Analog 3.5mm stereo and optical digital (SPDIF) outputs
Audio Format Support	PCM 2ch, Dolby/DTS 5.1, HD Audio (Dolby TrueHD, DTS-HD Master Audio, Dolby Atmos)
EDID Management	Rotary switch with 16 positions (including copy from display, up to 4K HDR)
Forced Hot Plug Detection	Slide switch to fix HPD voltage high
4K to 1080p Down-Convert	Slide switch to enable conversion for 1080p displays
ARC Pass-through	Yes, from ARC supported display to source
CEC Pass-through	Yes, from display to selected HDMI source
Included Accessories	Power supply, 2x L-brackets for mounting
Mounting Options	L-brackets or optional KD-SMS16 shelf (up to 12 units)
Regulatory Compliance	CE, RoHS, WEEE, EAC
Care Instructions	Clean only with dry cloth
Safety Precautions	Read instructions; do not use near water; install away from heat sources
Warranty	Limited 3-year product warranty
Spare Parts & Repairability	Contact manufacturer via RMA for service; power supply is replaceable

Frequently Asked Questions - KD-FIX418A-2 Key Digital

How do I de-embed audio from HDMI using the KD-FIX418A-2?

Connect your HDMI source to the input. The audio is de-embedded automatically to the 3.5mm stereo (analog) and optical digital outputs. Use the EDID rotary to select the desired audio format (e.g., 2CH, Dolby/DTS, HD Audio) so the source outputs matching audio.

What is the EDID rotary for and how do I set it?

The EDID rotary selects a handshake that tells your HDMI source which video and audio formats to output. Refer to the manual's table: positions 0 (copy from display), 1-6 for 1080p, 7-C for 4K with HDR, D-F for other modes. Turn it while the system is powered; most sources adapt without reboot.

Why is there no picture on my display?

Check that hot plug detection (HPD) is active. If the source doesn't see a display, enable the Forced HPD switch. Also verify the EDID setting matches your display's capability. Ensure all cables are securely connected and the power supply is plugged in.

Can I use this device to convert 4K to 1080p?

Yes. Set the 4K to 1080p Down Convert slide switch to ON. When enabled, incoming 4K content is down-converted to 1080p. Non-4K content passes through unchanged.

Does the KD-FIX418A-2 support HDCP 2.2?

Yes, it is fully licensed and compatible with HDCP 2.2 and earlier versions. This ensures secure playback of protected content.

What power supply do I need?

Use the included 5V/1A DC power supply (model SK01T-0500100Z) with a screw-in connector. Using a different adapter may void the warranty and risk damage.

What are the dimensions and weight of the device?

The unit measures 3.78 x 2.52 x 0.93 inches (94 x 64 x 23.5 mm) and weighs 5.4 oz (152 g). It is compact for easy mounting.

How do I mount the KD-FIX418A-2?

Use the included L-brackets to attach the unit to a surface. Alternatively, several units can be mounted in the optional KD-SMS16 shelf using side screws. Do not exceed 12 units to avoid overheating.

What audio formats are supported on the optical output?

The optical output supports PCM 2ch, Dolby Digital, DTS 5.1, and HD audio formats (Dolby TrueHD, DTS-HD Master Audio). Multi-channel PCM is not passed on digital output; it is muted. Use the EDID to select the appropriate audio format.

Is there a warranty on the KD-FIX418A-2?

Yes, Key Digital provides a limited 3-year product warranty. For service, obtain an RMA number by contacting [e-mail] or calling 914-667-9700.

USER MANUAL KD-FIX418A-2 Key Digital

Connections, LEDs, Slide Switches, and Rotaries. 5

Specifications 10

Important Product Warnings & Safety Instructions: 11

How to Contact Key Digital....12

Warranty Information....13

About KD-FIX418A-2

Key Digital ^® KD-FIX418A-2 is a 4K 18G HDMI connectivity repair and audio de-embedding solution for HDMI extension coupling and signal correction in all AV systems applications. Analog and digital audio de-embedding on 3.5mm analog stereo & optical digital connectors enable integration of HDMI signals into distributed audio systems, audio DSPs, amplifiers, or sound bars. EDID handshake management, forced hot plug detection, and optional 4K to 1080p down-conversion tools help overcome common HDMI integration problems for ease of installation. KD-FIX418A-2 supports a variety of SD, HD, VESA and Ultra HD 4K video standards and has HDR header information included in many of the built-in 4K EDID handshakes for an optimized viewing experience.

Note: Please visit www.keydigital.com for the latest product documentation and software downloads. Product features and specifications are subject to change without notice.

Key Features

HDMI Correction: Resolves common HDMI integration obstacles related to Hot Plug Detection, EDID handshaking, HDCP authentication, and bandwidth

Audio De-embedding: HDMI input audio is de-embedded on an analog 3.5mm stereo and digital optical connector.

4K to 1080p Down Convert: When enabled, resolution conversion is applied to individual outputs(s) based on EDID from the connected display.

Ultra HD/4K: Supports up to 4096x2160 or 3840x2160 24/25/30/60hz at 4:4:4 (signals up to 18Gbps bandwidth)

HDCP Licensing: Fully licensed and compatible with HDCP 2.2

HDR10 and Dolby Vision: More life-like images through a greater range of luminance levels

Resolution Support: Supports all SD, HD, and VESA (VGA, SVGA, XGA, WXGA, SXGA, UXGA) up to 4096x2160p.

Deep Color Support: Up to UHD/4K 30Hz 4:4:4/12 bits or 60Hz 4:4:4/8 bit

× Full Buffer System™: Manages TMDS re-clocking / signal re-generation, HDCP authentication to source & display, Hot Plug management, and EDID control handshake

EDID Management: Internal library with 15 internal EDID handshakes including 4K with HDR in addition to native EDID data copied from the output/display

Digital Audio Format Support: DTS-HD Master Audio™, DTS:X®, Dolby® TrueHD, Dolby Atmos®

ARC Pass-thru: From connected ARC supported display to connected ARC supported HDMI source

XCEC Pass-thru: From connected display to selected HDMI source

Included Accessories

Power Supply: 5V/1A (5W) DC power jack, screw-in type. Model SK01T-0500100Z

Mounting: 2x L-bracket

Usage Modes

*Maximum one active/directional HDMI cable may be used for 18Gbps signals

Quick Setup Guide

CONNECT:

1. Begin with the KD-FIX418A-2 unit, input and output devices turned off with power removed
2. Connect your HDMI source to KD-FIX418A-2's input port
3. Connect your HDMI display to KD-FIX418A-2's output port
4. Connect analog and/or digital audio outputs to amplifier, DSP, AV receiver, or sound bar
5. Screw-in the power supply to KD-FIX418A-2, then, plug-in to power outlet
6. Power on input and output devices

CONFIGURE:

Use the EDID rotary to choose the desired video resolution and audio format.
Use the Forced Hot Plug Detection switch to set the HDMI connectivity voltage to a high state.
Use the 4K to 1080p down-convert switch if integrating a 1080p display or projector in a 4K system.

See each section in this manual for more information on each setting.

Rack Mounting:

In addition to mounting with the supplied L-Brackets, multiple KD-FIX418A-2 may be mounted in KD-SMS16 using the side mounting screws. KD-SMS16 is a mounting shelf for Key Digital units with side mounting screw spacing of 2.912", 2.582", or 2.252".

Do NOT exceed 12 units as doing so will result in unit damage by overheating.

Front view of a black electronic device with multiple ports and indicator lights (no visible text or symbols)

Connections, LEDs, Slide Switches, and Rotaries

VIDEO INPUTS AND OUTPUTS:

HDMI Input:

The HDMI input is located on the short end beside the power.
Blue LED near the HDMI connector illuminates solid to indicate an active HDMI signal is incoming.

HDMI Output:

The HDMI output is located on the short end between the audio de-embed ports.
Blue LED near the HDMI connectors illuminates solid when Hot Plug Detection (HPD) is received from the display/output device and there is an active incoming HDMI signal.
The LED will blink steadily when there is no HPD from the display but an active HDMI signal is incoming.

HDMI Input/Output Port Specifications:

Supports up to UHD/4K @ 50/60 fps [4:4:4], 18Gbps signals
See Supported standard 4K Video Formats table
Supports HDR10
Compliant with HDCP 2.2 and previous
Supports lossless compressed audio formats including DolbyTrueHD, Dolby ^® Digital Plus, DTS-HD Master Audio ^™ , and Dolby Atmos
CEC pass-through from display to HDMI source
For Display Port sources/monitors, use active converters

Supported standard 4K Video Formats:

	Resolution Bandwidth
1	4K@24/25/30 [4:4:4] 8bit < 10.2Gbps
2	4K@24/25/30 [4:2:2] 8/10/12bit < 10.2Gbps
3	4K@50/60 [4:2:0] 8bit	< 10.2Gbps
4	4K@24/25/30 [4:4:4] 10/12bit	< 18Gbps
5	4K@50/60 [4:2:2] 8/10/12bit	< 18Gbps
6	4K@50/60 [4:2:0] 10/12bit	< 18Gbps
7	4K@50/60 [4:4:4] 8bit	< 18Gbps

AUDIO OUTPUTS:

Analog L/R Audio Output:

3.5mm stereo jack with de-embedded audio from the selected HDMI source

Drives audio signals up to 1 VRMS with a sampling rate of 192KHz
Automatically mutes if audio formatting is not PCM 2ch

Optical Audio Output:

Optical audio output with de-embedded audio from the selected HDMI source

SPDIF IEC 60958 format
Supports multi-channel Dolby and DTS™ surround formats up to 5.1
Automatically mutes if audio formatting is not PCM, DoFbyor DTS™

Audio Ports Specifications:

Each audio output drives audio signals up to 2VRMS with a sampling rate of 192KHz

There are no volume or tone control features
There are no DSP features

Audio Input Signal Format	Audio L/R Output	Digital Audio Output
2ch PCM Pass-Through Pass-Though
Multi-Channel PCM Front L&R Pass-through MUTE
Dolby DTS MUTE Pass-Though
HD Audio MUTE MUTE

Service (Factory) USB:

This port is for factory servicing only. Does not have standard USB functionality

EDID Handshaking Rotary:

EDID authentication is provided from the KD-FIX418A-2 to the connected input/source

The EDID file (AKA "handshake") is selected using the EDID rotary on the unit and provides a list of compatible video and audio formats as well as digital data, informing the source device what it should output.

Most sources will comply with a new EDID file without a power-cycle, but devices do behaves differently
Adjustments may speed up sync time during source selection.

Position EDID Handshake Description EDID Rotary

0 Copy EDID from HDMI Output

1 1920x1080p, 2CH AUDIO

2 1920x1080p, DOLBY/DTS 5.1

3 1920x1080p, HD AUDIO

4 1920x1200p, 2CH AUDIO

5 1920x1200p, DOLBY/DTS 5.1

6 1920x1200p, HD AUDIO

7 4Kx2K@60, 10.2G, HDR, 2CH AUDIO

8 4Kx2K@60, 10.2G, HDR, DOLBY/DTS 5.1

9 4Kx2K@60, 10.2G, HDR, HD AUDIO

A 4Kx2K@60, 18G, HDR, 2CH AUDIO

B 4Kx2K@60, 18G, HDR, DOLBY/DTS 5.1

C 4Kx2K@60, 18G, HDR, HD AUDIO

D 1280x720p@60 DVI

E 1920x1080p@60 DVI

F 1920x1080i, 2CH AUDIO

Forced HPD Troubleshooting Tool:

In cases of many layers of connectivity or non-standard devices in-line, hot plug detection (HPD) may be lost or drop below standard levels, leading to the video source not detecting a display/sync device and not outputting a signal. A display device may also not detect a connected source in cases of failed hot plug detection.

When ON, Hot Plug Detection voltage is fixed ON to the connected source, informing it that it always has a live sync/display to receive its signal

Standard HPD behavior (bypass) when set to OFF position

4K to 1080p Down Convert Tool:

When set to ON, KD-FIX418A-2 will down convert incoming 4K content to 1080p. All non-4K incoming content passes through without resolution conversion.
When set to OFF, all incoming content passes through without resolution conversion.

Specifications

Technical:

HDMI Input (Each): HDMI Connector, Type A, 19 Pin Female
HDMI Output: HDMI Connector, Type A, 19 Pin Female
HDMI Bandwidth: TMDS bandwidth 18Gbps
DDC Signal (Data): Input DDC Signal - 5 Volts p-p (TTL)
HDMI Video/Audio Signal: Input Video Signal - 1.2 Volts p-p

3.5mm Stereo Audio Output: Line level audio on TRS connector. Drives 1 VRMS line audio output with a sampling rate of 48kHz

Analog Audio Max Output Level: 4dBu on 150kΩ, DC coupling
Optical Digital Audio Output: Follows SPDIF format (IEC 60958). Supports sampling rate up to 192KHz.
Max Output Level: 1Vpp on 75Ω, DC coupling

Audio Bandwidth: 20Hz to 20kHz @ 0dBu

TND + Noise: 0.33% @0dBu @ 1kHz

Power Supply: 5V/1A (5W) DC power jack, screw-in type. Model SK01T-0500100Z

General

Regulation: CE, RoHS, WEEE, EAC
Enclosure: Black metal

Power Supply: USB to micro USB cable (power adapter not included)

Product: 3.78" x 2.52" x 0.93" (94 x 64 x 23.5 mm), Weight: 5.4 oz (152 g)
Packaging: 7.4" x 5.35" x 3.14" (188 x 136 x 80 mm), Weight: 16 oz (453 g)

Important Product Warnings:

1. Connect all cables before providing power to the unit.
2. Test for proper operation before securing unit behind walls or in hard to access spaces.
3. If installing the unit into wall or mounting bracket into sheet-rock, provide proper screw support with bolts or sheet-rock anchors.

Safety Instructions:

Please be sure to follow these instructions for safe operation of your unit.

1. Read and follow all instructions.
2. Heed all warnings.
3. Do not use this device near water.
4. Clean only with dry cloth.
5. Install in accordance with the manufacturer's instructions.
6. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
7. Only use attachments/accessories specified by the manufacturer.
8. Refer all servicing to qualified service personnel. Servicing is required when the device has been damaged in any way including:

»Damage to the power supply or power plug

»Exposure to rain or moisture

Power Supply Use:

You MUST use the Power Supply PROVIDED with your unit or you VOID the Key Digital® Warranty and risk damage to your unit and associated equipment.

How to Contact Key Digital®

Customer Support

For customer support questions please contact us at:

Phone: [phone]
E-mail: [e-mail]

Technical Support

For technical questions about using Key Digital® products, please contact us at:

Phone: [phone]
E-mail: [e-mail]

Repairs and Warranty Service

Should your product require warranty service or repair, please obtain a

Key Digital® Return Material Authorization (RMA) number by contacting us at:

Phone: [phone]
E-mail: [e-mail]

Feedback

Please email any comments/questions about the manual to:

E-mail: [e-mail]

Warranty Information

All Key Digital ^® products are built to high manufacturing standards and should provide years of trouble-free operation. They are backed by a Key Digital Limited 3 Year Product Warranty Policy. http://www.keydigital.com/warranty.htm

Visit product page for most recent version of the manual, firmware, control drivers and all additional downloads.

Key Digital ^® , led by digital video pioneer Mike Tsinberg, develops and manufactures high quality, cutting-edge technology solutions for virtually all applications where high-end video and control are important. Key Digital ^® is at the forefront of the video industry for Custom Installers, System Integrators, Broadcasters, Manufacturers, and Consumers.

Key Digital® Systems :: 521 East 3rd Street :: Mount Vernon, NY 10553

Phone : [phone] Fax : [phone] Web : www.keydigital.com

© 2022 Key Digital, Inc. All rights reserved.