REPAIRING AND NOT THROWING AWAY

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 February 2019

MAGNAVOX - 25PT 5335 - SERVICE MODE

MAGNAVOX - 25PT5335 - SERVICE MODE



ENTERING SERVICE MODE

There are two ways to enter service mode to this set.  With remote control, and without remote control.

With Remote Control


  • Press the following key sequence [062596], directly followed by 'Menu" button.  Do not allow display to time out between entries while keying the sequence. 

Without Remote Control

  • Short jumper wires [9252] & [9275] on the family board, and apply AC power.  This is a skilled work, that only any experienced service technician can do.  
  • Caution:  Entering the service mode by shorting wires [9252] & [9275] will override the (+8V) protection.  So do this only for a short period.  When doing this, the person who does it must know exactly what he is doing, as it could damage the TV set.


After entering service mode, a screen like this will be visible.



=================================================



00028           L4LUS1 0.12                                                SDM

ERR 00000

OP  000 057  140  032  120  128  000 





==================================================

  • When "Menu" button is pressed on the remote control, the set will switch on the normal user menu in service mode.
  • On the TV, Press and Hold the 'Volume Dn" button and Press the "Channel Dn" button for a few seconds to switch from SDM to SAM and reverse.
  • Switch the set to "Standby' to 'EXIT' from service mode.
  • If turn the television set OFF by removing AC power, without using the "Power" button first to make it standby, the set will remain in Service Mode and will switch back with Service Mode.  So, before unplug the power cord from AC wall socket, make the set to standby first. 
TO ENTER SERVICE ALIGNMENT MODE [SAM]

  • Press [062596] by remote control directly, followed by the 'OSD / STATUS button.  Do not allow the display to time out between entries while keying the sequence.  
SAM MODE DISPLAY

=============================================

00028    L4LUS1 0.12                SAM

ERR  00000

OP  000  057  140  032  120  128  000



Clear                                   Clear? >

Options                                 >

AJB                                      On

Tuner                                    >

White Tone                          >

Geometry                             >

Audio                                    > 

NVM Editor                         > 

ComPair                               >  On

=============================================
Posted By: FRANK at 02:17
TAG: ,