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 !

Saturday 23 February 2019

HITACHI 32PD7800 42PD7800 PLASMA DISPLAY SERVICE MODE AND ADJUSTMENTS

HITACHI 32PD7800 42PD7800 PLASMA DISPLAY SERVICE MODE and ADJUSTMENTS



TO ENTER ADJUSTMENT MODE

  • Using the front control buttons with the set turned Off [Standby mode], can activate it.
  • Press 'Sub Power' button, 'Input Select' button, and 'Dn' button at the same time, and Hold for more than 5 seconds. 
  • The set turns on adjustment mode with OSD.
CHANGING THE DATA AND SELECTING ADJUSTMENT CODE
  • When the set is in adjustment mode, the cursor 'Left, right, Up, Dn' and 'OK' buttons of the remote control or at the front panel can be used as adjustment keys.
  • Up / Dn buttons are used to select an item to adjust.
  • Left / Right buttons are used to adjust the data value to selected item.
  • 'OK' button is used to confirming the data.
  • After finished the necessary adjustments, press 'Menu' button.  Adjustment mode is released and the set returns to normal condition.
MEMORY INITIALIZE OPERATION

The execution of this function returns the adjustment codes to the preset values.  All adjustment data will be lost.
  1. Enter adjustment mode.
  2. Select 'Memory Init' adjustment code [658] and change the data value from '0' to '1'.
  3. Activate 'Memory Init' by pressing 'OK' button.
  4. Select No. 525, and change the data value from '1' to '0'.
  5. Check that the receiving channels goes to P1.  Unit is set to preset values.
TO GET TO BURN-IN MODE

This mode displays test patterns of some single color raster in turn.  These signals are from built in generator of the PDP panel.  So in can be presumed that may be 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, Input Select and Volume Dn button at the same time and hold for more than 5 seconds.
  • The set turns On with single raster and the OSD of [BURN IN:ON]
  • To escape from this mode, press 'Sub Power, Input Select and 'Up' button at the same time, and hold for more than 5 seconds.   Burn-In mode will be released. 
TO RECOVER THE REMOTE AND FRONT KEY FUNCTION
  • If the remote and front key cannot operate after miss set special function by front keys, these function can be recovered.
  • Press 'Sub Power, Input Select and 'Dn' button at the same time and Hold for more than 5 seconds.
  • The set turns On the Service Menu mode.
  • Select No.536 then each data set from '0' to '1'.
  • OR
  • Press the 'Sub-Power and 'Dn' button at the same time and Hold for more than 5 seconds.
TO CHECK METHOD OF USE ACCUMULATION TIME FOR PANEL
  • Select No.518 of the Service Menu.
SIGNAL CIRCUIT SELF DIAGNOSIS FUNCTION
  • This function is for the failure of the signal circuits, for example, as phenomenon as below:
  • 'Sometimes power turns Off automatically'.  'Sometimes Picture turns Off automatically'.
  • To enter this self-diagnosis mode, 

  1. The power cord should be connected to AC line and main power switch should be turned On.
  2. Turn the power Off by 'Sub power' button of the monitor or the remote control.
  3. Press 'Sub Power and 'Up' button on the bottom of the monitor at the same time, and keep them pressed for more than 5 seconds, after the power turned On.
  4. The monitor will be turned On, and it will display On-Screen display of Self-Check result and the failure history.
  5. Any operation would cancel the self-diagnosis mode.
Posted By: FRANK at 04:59
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