Originally Posted by
doug8867 
Wanted to say thanks to this site and Crabbon for providing the info to fix my tv! Also wanted to provide a little more info that may help others as my procedure did not go exactly as the instructions indicated.
The tv I have is the Panasonic TH-42PX25 42" plasma.
To get into the service mode I had to do the following:
Panasonic television service codes
PA25UP / PD25UP / PX25UP :
• * Using the remote control:
• * Press the {MENU} button.
• * Set "Antenna A" to "Cable".
• * Select "Timer" menu and set sleep timer to 30 min.
• * Press {Exit} twice to exit menus.
• * Tune to channel 124.
• * Press and hold {VOL -} button ON THE PLASMA TV. "CHK" appears in on top-left corner followed by 5 letter/numbers (which are the cumulative hours in hex numbers)
• * While the "CHK" is displayed, press the {OK} and {VOL+} buttons ON THE TV simultaneously to toggle between Modes: — Red "CHK" for Serviceman — Yellow "CHK" for Aging —
You want to leave it with the Red "CHK" on the screen.
• * Press the {POWER} button on the remote to select one of the six Serviceman Adjustments Modes.
A. MTS ADJUSTMENT
B. CLOCK ADJUSTMENT
C. VIDEO ADJUSTMENT
D. HDEF ADJUSTMENT
E. VDEF ADJUSTMENT
F. DAF ADJUSTMENT
G. OTHER ADJUSTMENT
(You will also see an AREA selection at the bottom of the screen which you will use when you go to fix the 1/3 screen problem)
• * Press {CH+} {CH -} on the remote to select the settings on each of Service Adjustment Modes. If you make any adjustments to other areas write down the original values before modifying anything. It's easy to erroneously adjust the wrong item.
• * Press {VOL+} {VOL -} on the remote to change values.
• * Press the {POWER} button on the TV to exit the service menu.
Once I was in the service mode I followed Crabbon's instructions (listed below) with the changes I've indicated in all -UPPERCASE-:
1) Remove one screw in the back of the plasma in the top left to access connector PA23.
2) Plug in the EEPROM (the part # above), and turn on the unit.
3) Go to serviceman mode
4) Go to EEP "AREA" and press "OK"
5) Press > cursor button twice to slect "15 9C FIX", press "OK"
6) Select EEP "EX > IN" and "15 9E _____" will begin flashing yellow/purple once data transfer starts. (about 30 seconds) -
-THIS FLASHED FOR ONLY A FEW SECONDS AND THEN REMAINED PURPLE-
7) When EEPROM data update is done, the unit will turn off and back on.
Wait for it to power itself back on. (about 30 seconds)
-THE TV DID NOT TURN ITSELF OFF SO I TURNED IT OFF MANUALLY BY PRESSING THE POWER BUTTON ON THE FRONT OF THE TV, AND THEN PRESS IT AGAIN TO TURN IT BACK ON AND THE TV WAS FIXED!-
8) Do some self checks if you like
9) Disconnect AC cord, remove JIG, and turn it on.
10) Enjoy, your plasma is fixed!!!
- I PURCHASED THE JIG (PART NUMBER TXNPX25JIGS) DIRECTLY FROM PANASONIC BY ORDERING IT ONLINE FROM PANASONICS WEB SITE. IT COST $60 INCLUDING SHIPPING ON 6.18.07.
HOPE THAT HELPS.
