Category: LCD Television Repair and Service
Contents of this article
- How to enter to service mode
- Self check mode
- Led Blinking code
PANASONIC TH-70LF50ER
Service
Mode CAT (Computer Aided Test) mode
How
to access the CAT mode
Press and hold the Volume down/-button on the top
panel of the unit and press the RECAL button on the remote control 3
times quickly within 2 second, this will place the unit into the CAT mode.
The exit CAT mode access the ID mode and switch off the main power..
The exit CAT mode access the ID mode and switch off the main power..
IIC mode
Select the IIC mode by Up/Down buton on the remote control at the front page of CAT mode and then press the Action button
on the remote control.
Select the IIC mode by Up/Down buton on the remote control at the front page of CAT mode and then press the Action button
on the remote control.
How
to access the CAT mode.
1. Select the alignment Subject by Up/Down
buttons on remote control.
2. Select the alignment Item by Left/Right buttons on the remote control.
3. Adjust optimum setting by Volume Up/Down buttons on the remote control.
4. The data is memorized when press the R button on the remote control or change the alignment Subject (or Items).
Subject and Item are mentioned on “IIC mode structure”.
2. Select the alignment Item by Left/Right buttons on the remote control.
3. Adjust optimum setting by Volume Up/Down buttons on the remote control.
4. The data is memorized when press the R button on the remote control or change the alignment Subject (or Items).
Subject and Item are mentioned on “IIC mode structure”.
To exit the IIC mode, press the R button on remote
control.
CD mode
Select the CD mode by Up/Down button on the remote control at the front page
of CAT mode and then press the Mute button on the remote control more
than 3 seconds.
SD mode
Select the SD mode by Up/Down button on the remote control at the front page of CAT mode and then press the Action button on the remote control.
Select the SD mode by Up/Down button on the remote control at the front page of CAT mode and then press the Action button on the remote control.
Self Check
1. Self check is used to automatically check the bus line controlled circuit of the LCD display.
2. To get into the Self check mode, press the volume down button on the customer controls at the top of the set, at the same time pressing the OFF TIMER button on the remote control, and the screen will show.
If the IIC ports have been checked and found to be incorret, or not located then “- -” will appear in place “OK”
“0A” in the lie of the “PTCP” means the number of blinks of the Power LED is 10. (Reference_Power LED blinking timing chart)
“H09” in the line of the “PTCP” is the error code To exit the CAT mode switch off the main power.
Note: The line of the “PTCP” display when you get into the Self check mode for first time only after the Power LED blinks.
1. Self check is used to automatically check the bus line controlled circuit of the LCD display.
2. To get into the Self check mode, press the volume down button on the customer controls at the top of the set, at the same time pressing the OFF TIMER button on the remote control, and the screen will show.
If the IIC ports have been checked and found to be incorret, or not located then “- -” will appear in place “OK”
“0A” in the lie of the “PTCP” means the number of blinks of the Power LED is 10. (Reference_Power LED blinking timing chart)
“H09” in the line of the “PTCP” is the error code To exit the CAT mode switch off the main power.
Note: The line of the “PTCP” display when you get into the Self check mode for first time only after the Power LED blinks.
Power LED blinking
When abnormality has occurred the unit, the protection circuit operates and reset to the stand by mode. At this time, the defective block can be identified by number of blinking of the Power LED on the front panel of the unit.
When abnormality has occurred the unit, the protection circuit operates and reset to the stand by mode. At this time, the defective block can be identified by number of blinking of the Power LED on the front panel of the unit.
Blinking time
|
Name
|
Detect item
|
2
|
POWER
SOS
|
POWER
PCB
|
4
|
PANEL12V
SOS
|
*PWR24V,
PWR15V, PWR5V Low level detect
*PANEL12V Low level detect |
10
|
DS_SOS
|
DS
PCB
*SLOT3.3V,SLOT5V.SLOT9V Low level detect *SLOT3.3V,SLOT5V.SLOT9V High level detect *FunctionBoard_SOS |
13
|
REGULATOR
SOS
|
A
PCB *D3.3V,DDR1.8V,H3.3V,AS1.8V Low level detect
|
RGB white balance adjustment
Conditions
# Make sure the front panel to be used on the final set is fitted.
# Center position
Adjustment
1. Set COMPONENT / RGB-IN SELECT to COMPONENT
2. Select the IIC mode “LCD Drive Adj.” item.
3. Check that the color temperature is “MID”
4. Output a white balance pattern.
5. Touch the signal receiver of color analyzer to the highlight window’s center.
6. Fix G drive at 30h and adjust B drive and R drive so x, y become the “Colour temperature NORMAL(Mid) in the below table.
7. At least fix one of the RGB’s drive data at 30h and adjust the others drive so x/y
(The highest RGB’s drive value is 30h)
# Make sure the front panel to be used on the final set is fitted.
# Center position
Adjustment
1. Set COMPONENT / RGB-IN SELECT to COMPONENT
2. Select the IIC mode “LCD Drive Adj.” item.
3. Check that the color temperature is “MID”
4. Output a white balance pattern.
5. Touch the signal receiver of color analyzer to the highlight window’s center.
6. Fix G drive at 30h and adjust B drive and R drive so x, y become the “Colour temperature NORMAL(Mid) in the below table.
7. At least fix one of the RGB’s drive data at 30h and adjust the others drive so x/y
(The highest RGB’s drive value is 30h)
Color Temperature x y
NORMAL(Mid) x 0.288, y 0.296
NORMAL(Mid) x 0.288, y 0.296
