- Shorted SMD Transistor In LED TV
- Never Saw TV LED Lights Like These
- Simple Way To Repair Color Problem In LED TV
- A LED TV Repair Attempt With A Disappointing Result
- How To Repair No Power Symptom In LED TV
- Dead LED TV restored back to life. Model: Fuji Japan
- 50″ LED TV Display Problem Repaired
- LED TV That I’m Not Able To Repair
- Shorted LED Lights In An LED TV Repaired. Model LG
- LED TV T-Con Board Problem
HP 2400 Scanner Repaired
A customer came to my workshop with his HP 2400 Flatbed Scanner unit stating the problem; while he is scanning anything he is getting some “COLOR BARS” on the scan image. I put one scrap visa card in the scanner and when scanned the image I found the same problem as stated by the customer.
The first thing I did was to check on the power adapter output voltage. It was 12 volt and steady. This had proven that the power supply was not the cause of the problem. The next step was to remove the scanner cover and check the internal parts.
Everything is seems to be ok as I did not found any suspicious damage. So I had decided to just do the cleaning/servicing work. I removed the front glass and cleaned the glass with the Glass Cleaner (you can use damp lint free cloth with mild soap).
Now I have cleaned everything inside the scanner but while moving the Scanner Unit I found the unit moving on the Platen Rod was not smooth hence I cleaned the platen rod with isopropyl alcohol and then applied little machine oil and white grease on platen Rod. I also lubricated the timing belt pulley and stepper motor Gears.
After the servicing process I put back everything that I have removed and tested the unit. I was delighted that the problem had been solved. You can check out the photo below where there were no more vertical color bars.
This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.
Please give a support by clicking on the social buttons below. Your feedback on the post is welcome. Please leave it in the comments.
P.S- Do you know of any your friends who would benefit from this content that you are reading now? If so, forward this website to your friends or you can invite your friends to subscribe to my newsletter for free in this Link.