Master Electronics Repair !

Welcome to Master Electronics Repair! website.Here you will find:Service Modes, Circuit Diagrams,Service manuals, Firmware Update procedure, Disassemble procedure, Universal remote control setup codes, Troubleshooting, Diagnosing, Measuring, and more.... of many of LCD/LED TV/Displays,others various electronic apparates,trough many technical notes and tips/tricks to help repairing/fixing Troubles/ faults,for electrical technicians.This site helps you to save the Earth from electronic waste!

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!

Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

How to use the site:

- If you landed here via any Search Engine, you will get what you searched for and you can search more using the search this blog feature provided by Google. You can visit more posts scrolling the left blog archive of all posts of the month/year,
or you can click on the main photo-page to start from the main page. Doing so it starts from the most recent post to the older post simple clicking on the Older Post button on the bottom of each page after reading , post after post.

You can even visit all posts, time to time, when reaching the bottom end of each page and click on the Older Post button.

- If you arrived here at the main page via bookmark you can visit all the site scrolling the left blog archive of all posts of the month/year pointing were you want , or more simple You can even visit all blog posts, from newer to older, clicking at the end of each bottom page on the Older Post button.
So you can see all the blog/site content surfing all pages in it.

- The search this blog feature provided by Google is a real search engine. If you're pointing particular things it will search IT for you; or you can place a brand name in the search query at your choice and visit all results page by page. It's useful since the content of the site is very large.

Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday 6 March 2019

HP CP2020 COLOR LASERJET PRINTER SERVICE MODE - ENGINE TEST - RAM INITIALIZATION - PRINTER REPAIR AND SERVICE

HP CP2020 Color laserjet printer Service mode - Engine test - Ram initialization - Printer repair and service

Category: Printer repair and service

Contents of this article

How to access Service mode
Engine test mode
NVRAM Initialization
Cold reset

HP CP2020

Service mode functions
Service menu
Use the control-panel Service menu to troubleshoot device problems.
Service menu settings
The Service menu is used to calibrate, restore factory default settings, and clean the print paper path. The following Service menu items are available:
# Restore defaults - used to reset all customer-accessible menu settings back to the factory default settings (except language) using the control panel or software
NOTE: This service menu item does not reset factory-settable settings, including formatter number, page counts, factory paper settings, language, and so on.
# PowerSave - used to configure the amount of idle time before the engine enters sleep mode
# Cleaning mode - used to remove dust and toner from the print paper path
Restore the factory-set defaults
1. Press OK to open the menus.
2. Use the Left arrow or the Right arrow button to select Service, and then press OK.
3. Use the Left arrow or the Right arrow button to select Restore defaults, and then press
OK.
The product automatically restarts.
Secondary service menu
Use the secondary service menu to print service-related reports and to run special tests. Customers do not have access to this menu.
Open the secondary service menu
1. Ensure the product is in the Ready state.
2. Press OK to open the menus.
3. Simultaneously press Left arrow and OK to open the secondary service menu.
4. Press the Left arrow and the Right arrow to navigate through the menu.

Engine resets
Engine test page
1. Turn the product on.
2. Use a fine-point tool, (for example a precision-slotted screwdriver with a 1 mm (0.04 in) blade width) to press the engine test button.
NOTE: Access the engine test button through a hole in the right-side cover.
3. An engine test page (horizontal lines in each of the print cartridge colors) prints.
Figure Engine test button location

Cold reset
The traditional cold reset function found in other HP LaserJet products is not supported for this product. The equivalent function is the Restore defaults option in the HP ToolboxFX or the Service menu. A cold reset unlocks menus that have been previously locked and resets all control-panel menu items to the factory defaults. It does not reset the serial number and the page counts.

NVRAM initialization
CAUTION: All HP Jetdirect settings are also reset. Be sure to print a configuration page before performing an NVRAM initialization. Make note of the IP address that is listed on the Jetdirect configuration page. You need to restore the IP address after performing an NVRAM initialization. Performing an NVRAM initialization resets the following settings and information:
# All menu settings are reset to factory default values.
# All localization settings, including language and country/region, are reset.
After performing an NVRAM initialization, reconfigure any computers that print to this product so that the computers can recognize the product.
Perform an NVRAM initialization
1. Turn the product off.
2. Simultaneously press the Right arrow button and the X button. Keep these buttons depressed as you turn the product on.
3. When Permanent storage init. appears on the display, release both buttons.
4. When the product has finished the NVRAM initialization, it returns to the Ready state.