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 !

Tuesday 12 March 2019

HITACHI 42PD4200 SERVICE MODE INITIALIZATION AND RESET

HITACHI 42PD4200 SERVICE MODE INITIALIZATION AND RESET

SERVICE MODE  AND RESET 

How to get to Adjustment mode (SERVICE MODE )
Using the front control buttons with the set turned off (standby) can activate it.
Press the SUB-POWER button, INPUT SELECT button and DOWN ARROW button at the same time, and hold for more than 5 seconds.
The set turns on in adjustment mode with OSD.
Changing data and Selecting Adjustment code .When the set is in adjustment mode, the cursor LEFT ,RIGHT ,UP ,DOWN and OK buttons of the remote control or front panel may be used as the adjustment keys. UP,DOWN buttons are used for selecting adjustment code. LEFT,RIGHT buttons are used for changing data values. OK button is used for confirming the data. After finishing the necessary adjustment press MENU button. Adjustment mode is released and the set returns to normal condition.
Memory Initialize operation
NOTE: The execution of this function returns the adjustment codes to the preset values, therefore, adjustment data will be lost.
Procedure
(1) Enter Adjustment Mode.
(2) Select MEMORY INIT adjustment code (No.744) and change the data value from 0 to 1.
(3) Activate MEMORY INIT by pressing OK button for more than 3 seconds.
(4) Select No.374 and change data value from 1 to 0.
(5) Check that the receiving channel goes to AV1. Unit is set to preset values.
Self-Diagnosis Function
PDP panel self-diagnosis function.
Signal circuit self-diagnosis function
This function is for the failure of the signal circuit, for example the phenomenon as below: "Sometimes power turns off abnormally." "Sometimes picture disappears abnormally."
To enter to this Self-Diagnosis mode, follow the next steps:
Preparation:
1) The Power Cord should be connected to AC line and the Main Power switch should be turned on.
2) Turn the power off by the SUB-POWER button of the monitor or the remote control.
Procedure:
1) Press the SUB-POWER button and UP ARROW button on the bottom of the monitor at the same time, and keep it for more than 5 seconds after the power turned on.
2) The monitor will be turned on, and it will display On-Screen Display of the Self-check result and the failure history as below.
3) Any operation would cancel the Self -Diagnosis mode.
4) The following table shows the OSD symbols and contents of failure PWB in which failure most probably would be allocated according to the number of blinks.
Troubleshooting
How to get to Burn-in mode
This mode displays the test patterns of some single color raster in turn. These signals are from built-in generator of PDP panel. So it can be presumed that maybe the panel has some trouble when the screen of
Burn-in mode is abnormal.
Using the front control buttons with the set turned off (standby) can activate this mode.
Press the SUB-POWER button, INPUT SELECT button and VOLUME DOWN button at the
same time, and hold for more than 5 seconds.
The set turns on with single color raster and the OSD of [BURN IN: ON].
To escape from this mode, press the SUB-POWER button, INPUT SELECT button and UP ARROW button at the same time, and hold for more than 5 seconds. Burn-in mode will be released.
How to recover the remote and front key function
If remote and front key cannot operate after miss set special function by front keys, these functions can recover by below method.
Select No.175 and data set from [0] to [1].
Or
Press the SUB-POWER button and RIGHT ARROW button at the same time, and hold for more than 5 seconds.
Note : If the following operation is performed, it becomes impossible to operate remote and front key. Press the SUB-POWER button, INPUT SELECT button and RIGHT ARROW button at the same time, and hold for more than 5 seconds.
Factory Reset
After all of the adjustments of main chassis are finished, perform FACTORY RESET.
Press the SUB-POWER button, INPUT SELECT button and UP ARROW button at the same time, and hold for more than 5 seconds.
The unit is set to factory settings.
Posted By: FRANK at 10:32
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