
TABLE OF CONTENTS
SAFETY PRECAUTIONS 
Please read all instructions before attempting to unpack, install or 
operate this equipment and before connecting the power supply. 
Please keep the following in mind as you unpack and install this 
equipment:
• Always follow basic safety precautions to reduce the risk of fire, 
electrical shock and injury to persons.
• To prevent fire or shock hazard, do not expose the unit to rain, 
moisture or install this product near water.
• Never spill liquid of any kind on or into this product.
• Never push an object of any kind into this product through any 
openings or empty slots in the unit, as you may damage parts 
inside the unit.
• Do not attach the power supply cabling to building surfaces.
• Use only the supplied power supply unit (PSU). Do not use the 
PSU if it is damaged.
• Do not allow anything to rest on the power cabling or allow any 
weight to be placed upon it or any person walk on it.
• To protect the unit from overheating, do not block any vents or 
openings in the unit housing that provide ventilation and allow 
for sufficient space for air to circulate around the unit. 
DISCLAIMERS
The information in this manual has been carefully checked and 
is believed to be accurate. We assume no responsibility for any 
infringements of patents or other rights of third parties which may 
result from its use.
We assume no responsibility for any inaccuracies that may be 
contained in this document. We make no commitment to update or 
to keep current the information contained in this document.
We reserve the right to make improvements to this document and/
or product at any time and without notice.
COPYRIGHT NOTICE
No part of this document may be reproduced, transmitted, 
transcribed,stored in aretrieval system,or anyof itspart translated 
into any language or computer file, in any form or by any means 
— electronic, mechanical, magnetic, optical, chemical, manual, or 
otherwise — without express written permission and consent
© Copyright 1997. All Rights Reserved.
Version 1.3 MAR 2014
TRADEMARK ACKNOWLEDGMENTS
All products or service names mentioned in this document may 
be trademarks of the companies with which they are associated.
CONTENTS 
INTRODUCTION ...............................................................1
PACKAGE CONTENTS .................................................. 2
FEATURES ....................................................................... 3
SPECIFICATIONS ............................................................ 4
FRONT PANEL ................................................................. 5
FRONT PANEL-ARC ................................................... 6
FRONT PANEL - AUX ................................................. 7
FRONT PANEL - EDID ............................................... 8
FRONTPANEL- ALL-OFF-LOCK-ENTER.................9
FRONTPANEL-RECALL-MEMORY.........................10
REAR PANEL ................................................................ 11
BACKPANEL- HDMIINPUT/ OUTPUT..................... 12
REMOTE CONTROL ...................................................... 13
EDID FUNCTIONS ......................................................... 15
TYPICAL APPLICATION ............................................... 19
IR EXTENDER ............................................................... 21
ETHERNET SERIAL INTERFACE ................................ 23
RS-232 PROTOCOL .................................................... 24
INTRODUCTION
The SB-5688AK is professional 8x8 matrix routing switch. 
Supporting eight (8) HDMI Inputs and (8) Auxiliary Audio Inputs. 
Output supported (8) HDMI and (8) SPDIF audio. The SB-5688AK 
is based on the HDMI standard and supports full resolution HDMI 
Video with embedded EDID, With a signal bandwidth of 340Mhz, 
there is no signal degradation. High Definition Digital signals can 
be selected and distributed to any (8) Inputs to (8) outputs. The 
Switcher is certified as being fully CEC , ARC and HDCP 2.0 
compliant, full HD 4K2K HDMI V1.4a 3D formats, data rates up 
to 6.75 Gbps. Supports UXGA/WUXGA/DVI 1920x1200 resolution 
to any HD displays. The SB-5688AK has 1x HDMI and Auxiliary 
Audio(analog stereo audio) connector for Input, effectively making 
this an (8) in x (8) out switcher. The EDID management can be 
selected between seven (7) different modes. Control is provided 
via Front panel push buttons, IR remote, RS-232 or TCP/IP (not a 
web-browser). An RS-232 Windows GUI interface is provided for 
matrix routing control (Windows only).
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