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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Tuesday, 26 February 2019

HOW TO ENTER SERVICE MODE TO JVC AV 32X25EU 28X25EU 32H20EU 28H20EU


HOW TO ENTER SERVICE MODE TO JVC  AV32X25EU 28X25EU 32H20EU 28H20EU



Before starting service menu adjustments:


  • There are two ways to adjust these TV sets.  One is with the remote control unit, and the other is the conventional method using a adjustment part and components.
  • The setting used the remote control unit is made on the basis of the initial setting values.  The setting values, which adjust the screen to optimum condition can be different from the initial setting values.
  • Make sure that the connection is correctly made to AC power source. 
  • Turn ON the power of the TV and measuring instrument for warming up, at least 30 minutes before starting adjustments.
  • If the receive or input signal is not specified, use the most appropriate signal for adjustment.
  • Never touch parts, such as variable resistors, transformers and condensers, not shown in the adjustment item.
  • Unless otherwise specified in the adjustment items, preset the following functions with the remote control unit.
SLEEP TIMER => OFF
TONE BALANCE => CENTER
ZOOM => FULL

TO ENTER SERVICE MENU
  • Press the 'Information" key and "Muting" key of the remote control handset simultaneously.  The service menu screen will appear. 
SELECTION OF SUB-MENU SCREEN
  • Press one of keys 1 to 5 of the remote control and select the sub menu screens.
SERVICE MENU ITEMS
  1. IF => This mode adjusts the setting values of the IF circuit.
  2. V/C => This mode adjusts the setting values of Video/Chroma ciruit.
  3. Audio => This mode adjusts the setting values of the multiplicty sound circuit.
  4. DEF => This mode adjusts the setting values of the deflection circuit for each aspect mode given below
FULL => [100/120Hzi]
PANORAMIC => [100/120Hzi]
SUBTITLE => [100/120Hzi]
COMPRESS => 100/120Hzi] (This value is fixed)
     5.  VSM Preset => This mode adjusts the initial setting values of Cool, Normal and Warm. [VSM = Video Status Memory].