PANASONIC PLASMA - TH-42PHD5 - TH-50PHD5 - TH-42PHW5 - TH50PHW5 - LED BLINKING CODES - SELF CHECK - HOW TO TROUBLESHOOT

PANASONIC PLASMA - TH-42PHD5 - TH-50PHD5 - TH-42PHW5 - TH50PHW5 - LED BLINKING CODES - SELF CHECK - HOW TO TROUBLESHOOT

                                     

If you are not familiar with electronics, do not attempt to repair.  Whether you suffer fatal electrical shock! Instead, contact any experienced service technician, or the nearest service center.

LED BLINKING CODES
When an abnormality has occurred in the unit, the protection circuit operates and shuts off the power supply. The faulty area can be identified by the number of flashes of the Power LED at the front of the unit

SELF CHECK DISPLAY

• Self-check is used to automatically check the bus line controlled circuits of the Plasma display.
• To get into the Self-check mode, press and hold the Volume Down button on the front of the unit, then the OFF-TIMER button on the remote control.
• In case the H, HY or HZ boards are disconnected, “IC3699 - -” is displayed.

The Plasma Display Panel unit may develop a failure, where the symptom is localized in a particular area of the screen. The figure below can help localize the circuit board that is most likely to be defective. In the example in figure , one of the two boards, C3 and D2 is likely to be the cause.

No picture (black Screen) Case-1

• The use of a magnifying glass can help localize the defective printed circuit board. Use the magnifying glass to take a close look at the pixels of the screen.
• If the pixels are totally dark, the defect is most likely located in one of the following boards:

SC-Board

SU-Board

SD-Board

• Check the status of the LED located on the SC-Board; if the LED is dark, a malfunction of the SC-Board is suspected.
• Listen to the buzz noise of the SC board; if the buzz noise is not present, a malfunction of the SC-Board is suspected.

• Check the Scan pulse waveform at TPSC1. (Use TPSS1 of the SS-board to trigger the oscilloscope.)
• Verify the input signals at connector SC2, SC4, SC20 and SC21.
• Verify that the signals of the clock and serial data lines from the D-board are present at connector SC20 and SC21.

                                                                    SS BOARD

No picture (black Screen) Case-2

• The use of a magnifying glass can help localize the defective printed circuit board. Use the magnifying glass to take a close look at the pixels of the screen.
• If the pixels are faintly lit, the defect is most likely located in one of the following boards:

SS-Board

SS2-Board

S3-Board

1. Check the status of the LED located on the SS-Board; if the LED is dark, a malfunction of the SS-Board is suspected.
2. Listen to the buzz noise of the SS-board. If the buzz noise is not present, a malfunction of the SS-Board is suspected.
3. Verify the input signals at connector SS3 and SS1.

• Check the Scan pulse waveform at TPSC1 of the SC-Board. (Use TPSS1 of the SS board to trigger the oscilloscope.)
• Proceed to check the power sources at connector SS11, SS12 and SS33.
• Verify that the clock and serial data lines from the D board are present at connector SS33.

It is easier to measure input levels at connector C33 of the C3- Board instead of connector SS33.

HORIZONTAL BACK BAR [COMPLETELY DARK]

The use of a magnifying glass can help localize the defective printed circuit board. Use the magnifying glass to take a close look at the pixels in the area of the black bar.

• If the pixels are totally dark, the defect is most likely located in one of the following boards

SC Board

SU Board (upper half of the screen only)

SD Board (lower half of the screen only)

• If the pixels are dimly lit, the defect is most likely located in one of the following boards

SS Board

SS2 Board (upper half of the screen only)

SS3 Board (lower half of the screen only)

 

  PANASONIC PLASMA - TH-42PHD5 - TH-50PHD5 - TH-42PHW5 - TH50PHW5 - TROUBLESHOOTING - AFTER IMAGE PREVENTION - OPTION SETTING 

                                         

VERTICAL BLACK BAR

• Since the C2 board contains the serial to parallel converters for the picture data that drive this portion of the screen; the most likely cause for this defect can be localized to the C2-Board or the D2-Board.

DEFECT-1

DEFECT-2

• Symptom: No OSD but it has video:  Check signal on the D1 board.

Symptom: Burned image (pattern) is visible.  Activate the scroll bar or run the set with a white raster for at least fifteen minutes.

AFTER IMAGE PREVENTION

If a customer has been viewing a 4:3 picture or another stationary pattern for a long period of time it is possible for an after image to be burned into the panel.  Operation in 4:3 mode for a long period can cause a permanent image burn, damaging the panel. Use of Just mode or Full mode is recommended if the input video source is 4:3 aspect ratio. Pressing the Aspect button on the remote control selects Just or Full mode.

Screen Saver Feature

The Screensaver feature may repair after image damage.

1. Press the Setup button on the remote control.
2. Use the Up/Down arrow buttons on the remote to highlight screensaver, then press the center button.  Use the Up/Down arrow buttons to highlight the function. Use the Left/Right Arrow buttons to change the setting.  Negative causes the image to invert, white areas become dark and vice versa. White bar scroll causes a white bar to appear and scroll across the screen continuously. Select White bar scroll, then use the arrow down button and then change the mode to ON.
3. Once the mode is ON the menu will disappear and the scrolling bar will appear.  Let the Scrolling bar screensaver run for at least 15 minutes if you are attempting to remove an after image problem.

• To stop the screen saver, press the R button on the remote control.

OPTION SETTING

1. Press to display the Setup menu.
2. Press to select OSD Language.
3. Press the surround button on remote control for more than three seconds. The action menu should be displayed on screen.
4. Use the Up/Down buttons to select the desired item.
5. Use the Left / Right Buttons to select the desired function.  The option menu will disappear 60 seconds after the operation.
6. Press the R button to exit the Option Menu.

Hidden Option Menu for GPH5D series

GPH5D chassis series have special function and operation setting facility that is called “Option Menu”. This Option Menu is useful for special functions that are required by certain customers. This should be set at the installation stage. The end user could not set or change these because the optional On Screen menu is hidden and accessible via the CAT-mode only.

Option menus	Default setting	Contents
Wobbling	Off	Wobbling operation On/Off. The outline of burnt image will be blurred by intermittent image shift.
Off-timer function	Enable	Off-timer operation Enable/Disable.
On Screen display	Off	Enable/Disable to display input mode indication after power on and no signal indication.
Input Initial	Off	Sets the initial input mode when the power is turned on. Allow input mode selection while power is on.
Initial VOL. level		Sets the initial volume level when the power is turned on. Allow Volume control while power is on.
Maximum VOL. Level	Off	Sets the maximum volume to desired level. Volume cannot exceed this level.
INPUT lock	Off	Fixes the input mode to AV, Component/RGB or PC. Cannot change input mode by input selection key.
Button lock	Off	Enable/Disable front operation buttons (Input and/or volume up/down)
Studio W/B	Off	Set warm mode color temperature to 3,200 Kelvin.
Remote control User Level	Off	Remote key invalidation Off: All keys of the remote are valid. User1: The keys that are Valid are: Stand-by (ON/OFF), Input, Status, Surround, Sound mute On/Off, and volume adjustment. User2: The key that is Valid is only the Standby (ON/OFF).

Setting the remote control User Level and Remote ID off.

1. Access service mode (CAT-mode) and press SET UP key on remote.
2. Access the hidden option menu.
3. Change the remote control User Level and/ or Remote ID set to off. menu is hidden and accessible via the CAT-mode only.