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!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday, 20 March 2019

GUIDE OF TROUBLESHOOTING TIPS - CRT BASED TELEVISIONS

GUIDE OF TROUBLESHOOTING TIPS - CRT BASED TELEVISIONS

TROUBLESHOOTING [ GENERAL INSTRUCTIONS]
   If a problem arises while you are using the TV, please read this “Troubleshooting” well before you request having the TV repaired. You may be able to fix it easily by yourself. For example, if the AC plug is disconnected from the AC outlet, or the TV aerial has problems, you may think there is a problem with the TV itself.


   After you have followed the Troubleshooting description or the operating description of the functions concerned without any success, remove the AC plug from the AC outlet and request a repair of your TV. Do not attempt to repair the TV by yourself or remove the rear cover of the TV.
If you cannot turn on the TV
  • Is the AC plug connected to the AC outlet?
  • Is the Power lamp lit? If not, press the Main power button.
NO PICTURE / NO SOUND
  • Have you chosen a TV channel whose reception is extremely bad? In this case, the BLUE BACK function will be activated; the entire screen becomes blue, and the sound is muted. In spite of this, if you want to view the TV channel, follow the description “BLUE BACK” to try to change the BLUE BACK function setting to OFF.
  • Have you connected the headphones to the TV? Connecting the headphones to the TV causes sounds not to be issued from the TV speakers.
  • Have you set the SPEAKER function to OFF? Follow the description “SPEAKER (Excluding AV28CH1EU)”  to confirm the SPEAKER function setting to try to solve the problem.
  • If the SYSTEM setting for a TV channel is incorrect, it may prevent the sound from being issued. Follow the description “EDIT/MANUAL” to use the MANUAL function to try to change the SYSTEM setting.
POOR PICTURE
  • If noise totally obscures the picture (snow), the aerial or aerial cable may have trouble. Check the following to try to solve the trouble:  Has the TV and aerial been connected properly?  Has the aerial cable been damaged?  Is the aerial pointed to the right direction?  Is the aerial itself faulty?
  • If the TV or aerial receives interference from the other devices, stripes or noise may appear in the picture. Move such devices as an amplifier, personal computer, or a hair drier that can cause interference away from your TV, or try changing its location. If the aerial suffers interference from a radio tower or high-voltage wire, please contact your local dealer.
  • If the TV receives interference from signal reflecting from mountains or building, double-pictures (ghosting) will occur. Try to change the aerial’s direction or replace the antenna with the one with better direction.
  • Are your COLOUR SYSTEM settings for the TV channels correct? Follow the description “COLOUR SYSTEM” on  to try to solve the trouble.
  • Has COLOUR or BRIGHT been controlled properly? Follow the description “Picture Adjustment” to try to adjust them properly.
  • Videotaping teletext is not recommended because it may not record correctly.
  • When a white and bright still image (such as a white dress) is displayed on the screen, the white part may look as if it were colored. It is a phenomenon unavoidable due to the nature of the picture tube itself, and not due to a TV failure. When the picture disappears from the screen, the unnatural colors will also disappear.
  • When viewing images from commercially available video software products, or videos from videotapes which have been recorded improperly, the top of the image may be distorted. This is due to the condition of the video signal, and not because of malfunction.
POOR SOUND
  • Have you adjusted BASS or TREBLE properly? If not, follow the description “Sound Adjustment” to try to adjust them properly.  When the TV channel reception is poor, it can be hard to hear the stereo or bilingual sound. In this case, follow the description “STEREO / I • II”  to hear the sound more easily by changing it to a mono sound.
OPERATION DISABLED
  • Have the batteries of the remote control become exhausted? Follow the description “Putting the batteries into the Remote control” 3 and replace them with new batteries to try to solve the problem.
  • Have you attempted to use the remote control at the sides or rear of the TV or at a location more than seven meters apart from the TV location? Operate the remote control in the front of your TV or a location less than seven meters from your TV to try to solve the problem.
  • When you are viewing a teletext programme, you cannot operate the menus. Press the button to return the teletext programme to the ordinary TV programme to try operating the menus.
  • If the TV operation becomes disabled suddenly, press the Main power button on the TV and turn off the main power. Try to press the Main power button again to turn on the main power. If the TV returns to a normal state, it is not a failure.
OTHER CONCERNS
  • When the SLEEP TIMER function operates, the TV is automatically turned off. If the TV is turned off suddenly, try to press the (Standby) button to turn on the TV once again. At this time, if the TV resumes a normal state, there is no problem.
  • When a WSS signal is included in the broadcast signal or the signal from an external device, or when the TV is receiving a control signal from an external device, the ZOOM mode will change automatically. When you want to return to the previous ZOOM mode, press the button to choose the ZOOM mode again.
  • If you bring a magnetized device such as a speaker near to your TV, a picture may be warped or unnatural colors appear at the corners of the screen. In this case, keep the device apart from your TV. If the speakers cause such phenomena, use the magnetic-shielded speakers instead.
  • A picture may be tilted due to the influence of the earth’s magnetism. In this case, use the “PICTURE TILT (Excluding AV28CH1EU)”  to complete the tilt.
  • It takes a short period of time from the time an operation such as changing channels is performed until an image is displayed. This is not a malfunction. This is the time required for the image to stabilize before it can be displayed.
  • The TV may emit a crackling sound due to a sudden change in temperature. It does not matter if a picture or sound does not show any abnormality. If you hear crackling sounds frequently while you are viewing the TV, other causes may be assumed. For precautionary purposes, request your service technician to inspect it.
  • Touching the screen may cause you feel a slight electric shock due to its static electricity. It is an unavoidable phenomenon due to the construction of the picture tube. It is not a problem with the TV. You can rest assured that this static discharge does not have harmful influence over the human body.  • When a menu is displayed on the screen, the ZOOM mode may be automatically changed to the FULL mode. This is not a malfunction. When the menu disappears, the ZOOM mode will return to the previously set ZOOM mode.
Posted By: FRANK at 06:26
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