Sc673-10 Ricoh Error -

How to Fix Ricoh Error SC673-10: Hard Disk Boot Failure

If you are staring at a frozen Ricoh copier screen displaying the error code SC673-10, your machine is trying to tell you a specific component has failed. This error essentially means the controller board cannot communicate with the Hard Disk Drive (HDD) during the startup (boot) process.

While "Hard Disk Failure" sounds intimidating, this issue is often fixable without calling a technician, provided you are comfortable with a few basic troubleshooting steps.

Here is a breakdown of what causes SC673-10 and how to resolve it.

Step 5: Test the Power Supply

Using a multimeter, check the voltage at the power supply output pins going to the controller board. Look for: sc673-10 ricoh error

+3.3V DC (to panel logic)
+5V DC (to panel touch controller)
+24V DC (to panel backlight, if LED)

Any fluctuation greater than ±5% may cause intermittent handshake failures.

2. Technical Definition

SC Classification: 600-series errors generally relate to controller or system hardware failures.
Specific Meaning: SC673 signals a communication timeout or failure between the Main Controller and the Printer Engine.
Suffix (-10): Often refers to the specific internal communication channel or bus identifier, but broadly falls under "Engine Connection Failure."

User Experience:

The machine turns on, but the screen shows a white, black, or garbled display.
The screen gets stuck on the Ricoh logo (boot loop).
The main machine might be running (fans, motors), but the touch panel is dead.
You cannot access User Tools or copy/print.

3. Controller Board Failure

A failing Controller Board (also called the Main Board or BICU board) may send incomplete or incorrect initialization signals. This is less common but happens, especially after a power surge or electrical event.

Q: Can I download firmware for free?

A: Officially, only Ricoh authorized dealers have access. However, some independent forums archive older firmware versions (use at your own risk). How to Fix Ricoh Error SC673-10: Hard Disk

4. Defective Operation Panel (Touchscreen Assembly)

The panel itself contains a small embedded computer (running Linux or a proprietary RTOS). If this board fails, it cannot respond to the controller’s handshake request.

When to Call a Professional Ricoh Technician

While the steps above are DIY-friendly for experienced IT staff, certain situations warrant a certified Ricoh service provider:

You do not have access to the latest firmware files (Ricoh restricts some firmware to authorized dealers).
The machine is under warranty or service contract – tampering may void coverage.
Replacing the Controller Board requires entering SP codes that can brick the machine if done incorrectly.
The SC673-10 recurs after you have replaced both the panel and the FFC.

A trained technician can also perform advanced diagnostics using the Ricoview Remote Panel or debug serial console, which are not available to end users. Any fluctuation greater than ±5% may cause intermittent

What is SC673-10? Understanding the Error Definition

First, let's decode the nomenclature.

SC stands for Service Call. This indicates a hardware or firmware-related issue that requires technical intervention beyond a simple user reset.
673 falls within the range of controller and communication errors. Specifically, SC67x series errors relate to communication failures between the Operation Panel (OP) and the Controller Board.
-10 is a sub-code that pinpoints the exact nature of the failure. In Ricoh’s technical documentation, SC673-10 refers to:

"Operation Panel Communication Error (Initial Communication Failed)."