REPAIRING AND NOT THROWING AWAY

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.

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..............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 !

Thursday 21 March 2019

HITACHI CV-4700 CV-4800 - HOW TO REPLACE THE CARBON BRUSH ASSEMBLY - VACUUM CLEANER

HITACHI CV-4700 CV-4800 - HOW TO REPLACE THE CARBON BRUSH ASSEMBLY - VACUUM CLEANER

TO REPLACE CARBON BRUSH ASSEMBLY
Take off four screws [M4X14], then the carbon brush assembly can be removed.
Put the new carbon brush assembly in place, and release the carbon brush by pushing up the holder pin toward the motor center.
Connect the lead wire with the terminal on carbon brush assembly.  [[When replacing carbon brush assemblies, be sure to replace the worn out carbon brush assembly with new one on both sides.  Be sure to connect the lead wire in proper way as shown in figure.]]

                                            Click on images to Enlarge

CARE OF AIR FILTERS
Remove the filter as shown, and wash in warm water
Dry through away from direct sunlight  and fit them back into the cleaner.
Remove the old filter from the cage and discard it.
Position the new filter in cage, and replace the cage in the cleaner
After assembly, run the cleaner for at least 15 minutes without joining the hose to its main body and be certain that there is no abnormal vibration.
Measure the insulation resistance between power supply plug and the metal surface by 500VDC insulation resistance tester and be certain that the insulation resistance is not less than 10M ohm.

CARBON BRUSH ASSEMBLY --> PART NUMBER --> CV-2500  911