Electro help: HOW TO DO A HARD RESET – FAULTS AND REMEDIES

Saturday, January 03, 2015

HOW TO DO A HARD RESET – FAULTS AND REMEDIES - PANASONIC PLASMA TVs

TH65PZ850U, TH58PZ850U, TH50PZ850U, TH46PZ850U, TH58PZ800U, TH50PZ800U, TH46PZ800U, TH42PZ800U, TH50PZ80U, TH46PZ80U, TH42PZ80U, TH50PX80U, TH42PX80U, TH50PZ85U, TH46PZ85U, TH42PZ85U.

How to perform a hard reset to Panasonic Plasma TV

Normally; a hard reset can be done by unplugging the TV from AC mains wall socket, and re-plug it back after some minutes or hours.

To perform HARD RESET of Plasma TV unit by pressing & holding VOL DOWN (-) on unit and MENU button on remote at the same time for about 3 seconds. This must be done if you replace the main board of the TV. All new A boards supplied from factory needs to be initialized.

After the main board replacement. once AC power cord is plugged in, unit will turn on by itself. Depends on factory settings, unit will either display Video, Component or Tuner icon. After few seconds, screen will change to service mode automatically. NOTE: Since unit is in service mode, only buttons 1, 2, 3 or 4 on remote are working (rest of buttons are nonfunctional). After hard reset, confirm if Plasma TV powers ON in user mode and check overall functionality.

FAULTS TO 46" PLASMA TVs

* The unit shuts down and power LED blinks 10 times.

> Shorted Q409 & open PR401. Replace Q409 & PR401

Speaker box is making rattling sound; contact with cabinet parts

* Vibration noise from left or right speaker. Speaker box is making direct contact with cabinet parts.

> Installing mounting screw in the center of speaker box prevents from touching the cabinet parts and minimizes the risk of vibration noise. Install screw, part number THEL049 to both speaker boxes as shown here. Repeat the same for left speaker box.