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 !

Wednesday, 20 March 2019

PANASONIC PLASMA TH-42PY8P - TH-42PZ8P - TH-42PZ8E - SERVICE MODE - SERVICE TOOL MODE - MEASUREMENTS & ADJUSTMENTS - TROUBLESHOOTING

PANASONIC PLASMA TH-42PY8P - TH-42PZ8P - TH-42PZ8E - SERVICE MODE - SERVICE TOOL MODE - MEASUREMENTS & ADJUSTMENTS - TROUBLESHOOTING


TO ENTER SERVICE MODE
While pressing [VOLUME ( - )] button of the main unit, press [0] button of the remote control three times within 2 seconds.
SERVICE MODE DISPLAY
KEY COMMAND
[1] button...Main items Selection in forward direction
[2] button...Main items Selection in reverse direction
[3] button...Sub items Selection in forward direction
[4] button...Sub items Selection in reverse direction
[RED] button...All Sub items Selection in forward direction
[GREEN] button...All Sub items Selection in reverse direction
[VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - ).
Contents of adjustment mode
  • Value is shown as a hexadecimal number.
  • Preset value differs depending on models.
  • After entering the adjustment mode, take note of the value in each item before starting adjustment.
TO EXIT SERVICE MODE
  • Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
SERVICE TOOL MODE
  • Select [SRV-TOOL] in Service Mode.
  • Press [OK] button on the remote control.
Display of SOS History
  • SOS History (Number of LED blinking) indication.
  • From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment.
  • This indication except 2nd and 1st occurrence after shipment will be cleared by [Self-check indication and forced to factory shipment setting].
POWER ON TIME/COUNT
  • To display TIME/COUNT menu, highlight position, then press MUTE for 3sec.
  • Time: Cumulative power on time, indicated hour : minute by decimal
  • Count: Number of ON times by decimal
  • Note: This indication will not be cleared by either of the self-check or any command.
TO EXIT
  • Disconnect the AC cord from wall outlet or switch off the power with the [POWER] button on the main unit.
HOTEL MODE
  • Access command to the Hotel mode setup menu In order to display the Hotel mode setup menu, enter the following command (within 2 second).
  • [TV] : Vol. [Down] + [REMOTE] : AV (3 times)
  • Then, the Hotel mode setup menu is displayed.
To exit the Hotel mode setup menu
  • Disconnect AC power cord from wall outlet or switch off the power with the [POWER] button on the main unit.
Explain the Hotel mode setup menu
MEASUREMENTS & ADJUSTMENTS
Item / Preparation
  • Input a white signal to plasma video input.
  • Set the picture controls as follows.
  • Picture menu:
Dynamic
PNR: OFF
Aspect: 16:9
Caution
  • First perform Vsus adjustment.
  • Confirmation of Vscn voltage should be performed after confirmation of Vad adjustment. When Vad= -140V, Voltage of Vscn is 8V ±1V.
See the Panel label.
Adjustments
  • Adjust driver section voltages referring the panel data on the panel data label.
  • Check or adjust the following voltages with the multimeter.
INITIALIZATION PULSE ADJUST
  • Input the White signal to plasma video input.
  • Set the picture controls as follows.
Picture menu : Dynamic
PNR: OFF
Aspect : 16:9
  • Connect Oscilloscope to TPSC1 (SC).  Check the voltage (T2) at 100 us period on the down slop.
Quick adjustment after P.C.B. exchange.
  • Adjust the following voltages with the multimeter
{Click on images to Enlarge}
See the Panel label.
Caution:
Absolutely do not reduce Vsus below +Ve not to damage the P.C.B.
ADJUSTMENT VOLUME LOCATION
TEST POINT LOCATION
BOARD NAME AND LOCATION

Applicable signals
Troubleshooting.
Use the self-check function to test the unit.
  • Checking the IIC bus lines
  • Power LED Blinking timing
Check of the IIC bus lines.   How to access
Self-check indication only:
  • Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control for more than 3 seconds.
Self-check indication and forced to factory shipment setting:
  • Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.

SCREEN DISPLAY
Check Point
Confirm the following parts if NG was displayed.
To Exit
Disconnect the AC cord from wall outlet or switch off the power with the [POWER] button on the main unit
Posted By: FRANK at 03:03
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