Preventive Maintenance Tips to Check and Troubleshoot the Repair of Document Scanner Problems

Maintenance and care of equipment is essential to prevent costly repairs and to save unnecessary service calls. In most cases, malfunctions are resolved by operator checks and corrective action. Your wallet will thank you, when the operator has properly checked to determine why devices are not functioning and avoids calling for service to repair or replace a working device.

Before operating the unit, read the manual that was included in the box or download it from the manufacturer website. Otherwise, you may risk damaging the device or voiding the warranty.

PMCS - Preventive Maintenance Checks and Services

Cleaning is the most important step to keep your device working properly. Clean dirty brake rollers, feed rollers, pads, glass, shading plates with a manufacturer cleaning kit or isopropyl alcohol, a lint free cloth, and Q-tips. Also make sure that the paper path is clean and free of debris.

Depending on the condition of documents and environment, the equipment may require a periodic disassembly to fully clean debris, paper clips, staples, dust, etc. that may have worked its way into the insides of the mechanism. The debris can cause a motor to stop running and rollers and belts to jam. Use a shop-vac to vacuum whatever dirt or foreign objects that have worked their way inside the main and side covers. Generally, it is not recommended to blow the scanner out using a compressed can of air. The reason is that the compressed air leaves film on the glass, does not remove the dirt (just blows it around), may break seals and cold air could damage a hot sensor.

CDD (Charge-coupled device) Cameras and CIS (Contact Image Sensor Assembly) Reader

Upon disassembly, the cameras units on devices with CCD cameras should be cleaned. Care should be taken not to damage the cameras as they are usually quite expensive. Canon products are equipped with CIS reader assemblies with a LED light source and the reader assemblies should not be removed or disassembled to avoid damage.

Consumable Replacement

Separator pads and pick rollers should be replaced when worn or according to manufacturer schedule. Shading plates and glass should be inspected and replaced as required. Fluorescent lamps usually require replacement between 500 to 1000 hours of use according to manufacturer guide recommendations. Canon uses a LED light source that usually does not require periodic replacement.

The Scanner System

Systems include not only the scanning devices, but also the computer and operating system as well as the software. There is a tendency to think that problems are mechanical. This is not always the case. In order to resolve the troubles, users may require technical competency. A+ skills and practices should be employed to troubleshoot the system before a service call. The technician is hired to fix the hardware. It is not his job to diagnose computer systems. This is your job or the job your IT department.

Hardware Feed Issues and Poor Scan Quality

Feed issues and poor scan quality are usually corrected through cleaning and replacing worn consumables. Brake and pick rollers should be checked to ensue that they are properly installed. The paper path should also be inspected and any foreign objects removed.

Scanning Software

Common are issues with drivers not found or installed. Re-install the software or make sure that the driver is recognized. Outdated firmware may also cause the equipment to not operate properly. Install the latest firmware. But note installation of incorrect firmware in some cases could permanently damage the main control board. Also, recheck the scan settings to assure that they are set properly.

PC Computer and Operating System

You must assign each SCSI device a separate SCSI ID to avoid an ID conflict. USB and fire wire devices need proper privileges and security rights when connected to a network. The best method to check for problems with the operating system is to swap the computer with another that you know to be working properly.

Troubleshooting and Repair

You can find minor parts that you can fix without too much technical knowledge. For instance check for broken parts and the tension of springs and flat springs. A parts manual can help you identify a problem. Some companies provide diagnostic software. The Canon quma tool provides diagnostic checks of motors, sensors, solenoids and other essential parts.

If you do not have the technical ability, you can buy a service agreement for your scanner. The warranty covers the maintenance and repairs rather than risking a breakdown and costly time and material repairs. Another option is depot repair where you send the equipment to the repair facility which is less costly than on-site services. Some manufacturers only provide a 90 day warranty and the purchase of an extended warranty is recommended.

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Mustang Brake Problems

The brake system on your Ford Mustang requires periodic inspection and maintenance. Unfortunately, it is not until we notice strange smells, noises or mechanical changes coming from a brake component that we start to pay attention to the system. For the most part, lack of maintenance is the main cause of most brake system troubles, which makes diagnosing and solving the problem much easier. However, neglect the symptoms, and you are asking for serious trouble on the road.

Checking the Hydraulic System

First, check for the most obvious cause of brake problems. Make sure the brake fluid level on the brake master cylinder is correct. The master cylinder is located inside the engine compartment, in front of the steering wheel and mounted on a cylindrical unit called the brake booster. Add the brake fluid recommended on your car owners manual, if necessary.

Check the brake booster and the vacuum hose attached to it for signs of wear or damage. Problems on the booster housing or hose may cause vacuum to leak, and leave your brakes extremely difficult to operate.

Then check for possible leaks around the master cylinder and the brake lines that connect to it. Make sure the connections are tight. James E. Duffy, on Modern Automotive Technology, recommends running your fingers along the lines to check for hard to detect leaks. Inspect the brake hoses that join the lines to the brake assemblies on each wheel. Remove the tires, and use a flashlight to look for wet spots around the hoses and the back of the wheel assemblies. If necessary, replace the brake hoses.

Inspecting Wheel Brake Assemblies

Once you remove the tires, check the brake pads, shoes, rotors and drums for wear, damage and wet spots that might indicate fluid leaks or grease contamination. As a rule of thumb, the linings on the pads and shoes should be thicker than the back plate on which they are mounted. Closely examine the rotors and drum braking surfaces for heat checks, scores and cracks. If necessary, take your rotors and drums to the auto repair shop for resurfacing.

When removing the drums on the back wheels, inspect the wheel cylinder. This is a small cylinder mounted on the upper section of the back plate. Pull back the rubber boots on each side of the cylinder to check for brake fluid leaks. A leaking cylinder can be rebuilt or replaced. Inspect the drum brake mechanism like springs; hold down the springs and adjuster star wheel to check for missing or binding parts.

If your Ford Mustang model is equipped with an anti-lock brake system (ABS), and the system light flashes on your dashboard as you drive, your vehicle computer has detected a malfunction. You can use a scan tool to retrieve any trouble codes stored in the computer memory to diagnose the malfunction, or have the auto shop look at the problem.

For help locating brake system components or required maintenance intervals for your specific Mustang model, you may consult your car owners or vehicle service manual. Most auto parts stores carry service manuals, and your local public library might have several of these manuals for reference.

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