Panasonic TH-55LF6W / TH-55LF60W Service Manual ▷ View online
17
TH-55LF6W_TH-55LF60W
6.1.3.
LCD Panel test mode
White
Magenta
Yellow
Cyan
Black
[How to display the test pattern]
[Display pattern]
The failure-diagnosis by LCD Panel test mode
To find the possible failure point where in LCD Panel or Printed Circuit Board when the
abnormal picture is displayed.
abnormal picture is displayed.
1. While pressing [VOLUME ( - )] button of the main unit, press [R] button of the
remote control three times within 2 seconds.
2. Test pattern is displayed and Power LED lights red and orange alternately.
remote control three times within 2 seconds.
2. Test pattern is displayed and Power LED lights red and orange alternately.
How to Exit: Turn off the unit.
How to Exit: The unit automatically turns off after around 10 seconds.
1. Press [Recall] button of the remote control.
2. Press [R] button of the remote control.
3. Press [N] button of the remote control for over 3 seconds.
4. Test pattern is displayed and Power LED lights red and orange alternately.
2. Press [R] button of the remote control.
3. Press [N] button of the remote control for over 3 seconds.
4. Test pattern is displayed and Power LED lights red and orange alternately.
It is unfixed from which color it starts.
(1) Main unit + remote control operation
(2) Remote control operation only
[Test pattern output image]
LCD Panel
A-Board
A-Board
LCD
IC
T-CON
Test pattern
Output test pattern from
A-Board
FR-Board
IC
Double-
speed
processing
speed
processing
Video signal processing
IP conversion
OSD synthesis
IP conversion
OSD synthesis
Test pattern
Input
switching
switching
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TH-55LF6W_TH-55LF60W
[Diagnostic flow chart]
Yes
It displays.
It displays.
No
It is still abnormal.
It is still abnormal.
Is a test pattern
displayed normally?
displayed normally?
Failure of A-Board
Failure of A-Board
Failure of LCD Panel
(rarely failure of A-Board or FR-Board)
(rarely failure of A-Board or FR-Board)
Failure of FR-Board
Failure of FR-Board
No
This is not an abnormality
of part
This is not an abnormality
of part
No
- The whole is not abnormal.
- It is not blinking.
- The whole is not abnormal.
- It is not blinking.
Yes
It is abnormal.
It is abnormal.
Yes
It disappears.
It disappears.
No
It is still abnormal.
It is still abnormal.
No
It is still abnormal.
It is still abnormal.
Yes
It disappears.
It disappears.
Is a part abnormal
even in a test pattern?
even in a test pattern?
If "FRAME CREATION" of
"PICTURE" in On-Screen
Menu is set to "OFF", does
symptom disappear?
"PICTURE" in On-Screen
Menu is set to "OFF", does
symptom disappear?
Failure of A-Board or LCD Panel
(rarely failure of FR-Board)
(rarely failure of FR-Board)
Yes
It is abnormal.
It is abnormal.
Yes
It is blinking.
It is blinking.
Is the whole abnormal
even in a test pattern?
or
A test pattern is not
displayed but is the state
of LED blink of red and
orange?
even in a test pattern?
or
A test pattern is not
displayed but is the state
of LED blink of red and
orange?
Yes
It is green lighting.
It is green lighting.
A test pattern is not
displayed but is the state
of LED green lighting?
displayed but is the state
of LED green lighting?
Vertical line/
Vertical bar
Vertical bar
Color
unevenness
unevenness
Horizontal line/
Horizontal bar
Horizontal bar
Vertical line/
Vertical bar
Vertical bar
An image is
not displayed.
not displayed.
LED blinking
An image is
not displayed.
not displayed.
LED lighting
̪ Please refer to the next page for "FRAME CREATION".
Please refer to the next page for "FRAME CREATION".
If "FRAME CREATION" of
"PICTURE" in On-Screen
Menu is set to "OFF", does
symptom disappear?
"PICTURE" in On-Screen
Menu is set to "OFF", does
symptom disappear?
19
TH-55LF6W_TH-55LF60W
[Reference: FRAME CREATION]
FRAME CREATION is the function to double the number of display segments of an image and
to show a fast moving scene more finely.
to show a fast moving scene more finely.
OFF :Please select "OFF", when an image is unnatural.
MIN
MIDDLE
MAX
MIN
MIDDLE
MAX
-
The mode is memorized per input terminal.
-
Even if “NORMALIZE” is selected, the NORMAL setting will not be restored.
-
The picture and menu will disappear for a moment if you switch the mode to OFF, or
switch from OFF to another mode.
“PICTURE” menu screen
Setting procedure and Diagnosis when the failure-diagnosis
"FRAME CREATION" setting is a setting of intermediate frame generation when
carrying out double-speed processing (from 60 to 120 frames).
Even if it sets to "OFF", it is not a function which becomes uniform processing.
carrying out double-speed processing (from 60 to 120 frames).
Even if it sets to "OFF", it is not a function which becomes uniform processing.
[1] Press [PICTURE] button of the remote control, and display "PICTURE" menu screen.
[2] Change the item of "FRAME CREATION" into "OFF".
Please check the symptoms when it is changed to "OFF".
[2] Change the item of "FRAME CREATION" into "OFF".
Please check the symptoms when it is changed to "OFF".
When changing to "OFF", the normal screen is displayed: Failure of FR-Board
100
70
50
50
PICTURE
NORMAL
NORMALIZE
STANDARD
BRIGHTNESS
50
Colour
50
Tint
PICTURE MENU
PICTURE
BACKLIGHT
ADVANCED SETTINGS
COLOR TEMP
NORMAL
SHARPNESS
50
FRAME CREATION
MAX
FRAME CREATION
MAX
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TH-55LF6W_TH-55LF60W
6.2.
No Power
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