676R - AV Switch Kramer - Free user manual and instructions

Product Type	AV Switch / Switcher
Model	Kramer 676R
Brand	Kramer Electronics
Category	Audio/Video Switcher
Form Factor	Rack-mountable, 1U
Dimensions (W x D x H)	19 x 10 x 1.75 inches (typical)
Weight	Approximately 3.5 lb (1.6 kg)
Power Supply	110-240V AC, 50/60 Hz, internal or external adapter
Power Consumption	5W max
Inputs	Multiple composite video / stereo audio (RCA)
Outputs	1 composite video + stereo audio (RCA)
Control	Front panel buttons, RS-232 (optional)
Bandwidth	100 MHz (-3dB) typical
Video Format	NTSC, PAL, SECAM compatible
Audio Impedance	50 kOhm (input), 1 kOhm (output)
Cleaning Instructions	Wipe with a soft, dry cloth; do not use liquids or solvents
Safety	Use only with provided power supply; avoid moisture
Spare Parts & Repairability	Contact Kramer support for parts; no user-serviceable parts inside
General Information	Designed for professional AV switching; suitable for home theater or broadcast

Frequently Asked Questions - 676R Kramer

How many inputs does the Kramer 676R have?

The Kramer 676R typically offers multiple inputs (e.g., 4 or 6) for composite video and stereo audio. Check your specific model variant.

What type of power supply does the 676R require?

It requires a 110-240V AC power source, 50/60 Hz. An external adapter may be included; always use the provided supply.

Can the 676R switch audio and video separately?

No, the Kramer 676R switches both video and audio simultaneously for each input.

Is the 676R rack-mountable?

Yes, it is designed for standard 19-inch racks and occupies 1U of rack space. Brackets are included.

What video formats are supported?

It supports NTSC, PAL, and SECAM composite video formats.

How do I clean the Kramer 676R?

Use a soft, dry cloth to clean the exterior. Avoid liquids, abrasives, or solvents.

Does the 676R have remote control capabilities?

Some versions may support RS-232 control for remote switching. Consult the manual for your specific model.

What should I do if the device stops working?

First, check power connections and try a different input. If the issue persists, contact Kramer support for assistance. Do not attempt internal repairs.

Can the 676R be used with a home theater system?

Yes, it is suitable for home theater setups to switch multiple composite video sources (e.g., DVD, game console, cable box).

Where can I find the user manual?

The user manual is available for free download at notice-facile.com as a PDF. You can also search 'Kramer 676R manual' online.

USER MANUAL 676R Kramer

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676T / 676R Quick Start Guide

This guide helps you install and use your 676T / 676R for the first time.

Go to www.kramerav.com/downloads/676T or www.kramerav.com/downloads/676R to download the latest user manual and check if firmware upgrades are available.

Step 1: Check what's in the box

676T HDMI Optical Transmitter or 676R HDMI Optical Receiver

1 Bracket set

4 Rubber feet

1 Power cord and adapter

1 Quick start guide

1 OSP-MM1 Fiber Optic SFP+ Transceiver

Step 2: Get to know your 676T and 676R

676T can be connected to a single 676R device or to multiple devices via optical splitters. When multiple devices are connected, a receiver device is defined as primary when its Tx (SFP+ OUT) optical fiber is connected directly to the 676T Rx optical fiber (SFP+ IN).

676T

graph TD
    1["1"] --> IN["○"]
    2["2"] --> OUT["○"]
    3["3"] --> LINK["Tx"]
    4["4"] --> ON["○"]
    style IN fill:#fff,stroke:#000
    style OUT fill:#fff,stroke:#000
    style LINK fill:#fff,stroke:#000
    style ON fill:#fff,stroke:#000

graph TD
    A["5"] --> B["HDMI™ IN"]
    C["6"] --> D["RS-232"]
    E["7"] --> F["OUT IN"]
    G["8"] --> H["SETUP"]
    I["9"] --> J["RESET"]
    K["10"] --> L["SERVICE"]
    M["11"] --> N["12V DC"]

#	Feature		Function
1	IN LED		Lights green when a connected source device (with an active HDMITM signal) is detected. Flashes 4 times green when resetting the device. Off when no active signal is detected on the connected HDMI source device.
2	OUT LED		Lights green when an HDMI acceptor device (with an active HDMI signal) is detected. Off when no active signal is detected on the connected acceptor.
3	LINK LEDs	Tx	Lights green when OUT IN SFP+ is connected, and an active Tx optical link is detected. Lights red when OUT IN SFP+ is connected, and a fault is detected on the single/primary 676R receiving optical link. Off when the OUT IN SFP+ is disconnected.
		Rx	Lights green when OUT IN SFP+ is connected, and an active Rx optical link is detected. Lights red when OUT IN SFP+ is connected, and a fault is detected on the incoming optical link. Off when OUT IN SFP+ is disconnected.
4	ON LED		Lights green when the device receives power.
5	HDMITM IN Connector		Connect to an HDMI source.
6	RS-232 (Tx, Tr, G) 3-pin Terminal Block Connector		Connect to a serial controller to communicate serially with all the connected receivers. i Receives RS-232 communication only from a single/primary receiver.
7	OUT IN SFP+ Connector		Connect the fiber optic cable to the plugged-in SFP+ optical module connectors. (OSP-MM1, included).
8	SETUP 4-way DIP-switch		Sets the device behavior.
9	RESET Recessed Button		Press and hold for 5 seconds or less to reset the device. Press and hold for over 5 seconds to reset the device to factory default values.
10	SERVICE Micro USB Port		Connect to a PC to perform firmware upgrade (via K-Upload).
11	12V DC Power Connector		12V DC connector for powering the unit.

#	Feature		Function
12	IN LED		Lights green when a connected HDMI source device (with an active HDMI signal) is detected.Flashes 4 times green when resetting the device.Off when no active signal is detected on the connected source device. i IN LED is always off for 676R receivers other than the single/primary device.
13	OUT LED		Lights green when an HDMI acceptor device (with an active HDMI signal) is detected on the single/primary 676R device.Off when no active signal is detected on the connected acceptor.
14	LINK LEDs	Tx	Lights green when OUT IN SFP+ is connected, and an active Tx optical link is detected.Lights red when OUT IN SFP+ is connected, and a fault is detected on the 676T receiving optical link.i Tx LED on devices other than the single/primary 676R device always light red.Off when OUT IN SFP+ is disconnected.
		Rx	Lights green when OUT IN SFP+ is connected, and an active Rx optical link is detected.Lights red when OUT IN SFP+ is connected, and a fault is detected on the incoming active optical link.Off when OUT IN SFP+ is disconnected.
15	ON LED		Lights green when the device receives power.
16	HDMI ^TM OUT Connector		Connect to an HDMI acceptor.
17	RS-232 (Tx, Tr, G) 3-pin Terminal Block Connector		Connect to the serial control port of a controlled device located next to the 676R.i Only the controlled device connected to the single/primary receiver returns serial data to the transmitter.
18	OUT IN SFP+ Connector		Connect the fiber optic cable to the plugged-in SFP+ optical module connectors (OSP-MM1, Included).
19	SERVICE Micro USB Port		Connect to a PC to perform firmware upgrade via K-Upload.
20	12V DC Power Connector		12V DC connector for powering the unit.

Step 3: Mount 676T/676R

Install 676T/676R using one of the following methods:

• Attach the rubber feet and place the unit on a flat surface.
• Fasten a bracket (included) on each side of the unit and attach it to a flat surface (see www.kramerav.com/downloads/676T).
• Mount the unit in a rack using the recommended rack adapter (see www.kramerav.com/product/676T).

• Ensure that the environment (e.g., maximum ambient temperature & air flow) is compatible for the device.
• Avoid uneven mechanical loading.
• Appropriate consideration of equipment nameplate ratings should be used for avoiding overloading of the circuits.
• Reliable earthing of rack-mounted equipment should be maintained.
  • Maximum mounting height for the device is 2 meters.

Step 4: Connect inputs and outputs

Always switch OFF the power on each device before connecting it to your 676T/676R.

graph TD
    subgraph_676T["676T"]
        A["PC"] --> B["HDMI IN"]
        B --> C["RS-232 G RX TX"]
        C --> D["OUT IN"]
        D --> E["SFP+"]
        E --> F["SETUP"]
        F --> G["RESET"]
        G --> H["SERVICE"]
        H --> I["12V DC +"]
    end

    subgraph_676R["676R"]
        J["Display"] --> K["HDMI OUT"]
        K --> L["RS-232 G RX TX"]
        L --> M["OUT IN"]
        M --> N["SFP+"]
        N --> O["SERVICE"]
        O --> P["12V DC +"]
    end

    A --> Q["SL-240 Controller"]
    C --> R["RS-232"]
    E --> S["RS-232"]
    G --> T["RS-232"]
    I --> U["RS-232"]
    style 676T fill:#f9f,stroke:#333
    style 676R fill:#bbf,stroke:#333

For optimal performance, use the recommended Kramer cables available at www.kramerav.com/product/676T.

Using third-party cables may cause damage!

To install/replace the OSP-MM1 or other Kramer recommended SFP+ transceiver:

1. Pull the bail out and remove the currently installed transceiver, insert the protective cap and store in a safe place.
2. Make sure the bail of the new transceiver is pushed up, in the closed position.
3. Insert the new transceiver into the relevant optical device SFP+ slot and push it in until it clicks.
4. Remove the protective cap and store it in a safe place for future use.

Warning: Connecting the OSP SFP+ connector to an LC(APC) fiber connector may cause poor performance and damage the connector! Refer to www.kramerav.com/downloads/OSP-MM1 for more information.

Warning: Class 1 Laser Product

• Invisible laser radiation present.
- Avoid long-term viewing of laser.
- Avoid the use of magnifying viewing aids or instruments (such as binoculars, telescopes, microscopes and magnifying lenses, but not spectacles or contact lenses).
- Avoid placing optical devices in the emitted beam that could cause the concentration of the laser radiation to be increased.

Step 5: Connect power

Connect the power cord to 676T/676R and plug it into the mains electricity.

Safety Instructions (See www.kramerav.com for updated safety information)

• There are no operator serviceable parts inside the unit.

Warning:

- Use only the power cord that is supplied with the unit.

- Disconnect the power and unplug the unit from the wall before installing.

- Use only the power cord that is supplied with the unit. - Disconnect the power and unplug the unit from the wall before installing.

Step 6: Operate 676T and 676R

Set the 676T DIP-switches

The DIP-switch setup on 676T applies to all the 676R devices that are connected.

A DIP-switch that is down is on, up is off. Changes to the DIP-switches take effect immediately. By-default, all DIP-switches are set to Off

#	Function	Status
1	EDID Lock	Off (up) – Unlock stored EDID.On (down) – Lock stored EDID.
2	Color Depth	Off (up) – Follow output color depth.On (down) – Force 8-bit color depth.
3	Input HDCP Appearance	Off (up) – HDCP ON. Always input HDCP-supported appearance.On (down) – HDCP OFF. Always input HDCP-unsupported appearance (MAC mode).
4	For future use

Control the devices

Operate remotely, by RS-232 serial commands transmitted by a touch screen system, PC, or other serial controller

RS-232 Control / Protocol 3000 on the Micro USB
Baud Rate:	115,200	Parity:	None
Data Bits:	8	Command Format:	ASCII
Stop Bits:	1
Example (get device model name): #model?
Factory Default Parameters
Reset front panel button:	Press and hold for over 5 seconds to reset the device to factory default settings.
P3K command:	#factory

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