Contents of this article
- How to enter the service mode
- Standby led blinking code
- Self check mode
- Hotel mode
- Troubleshooting
LED TV
PANASONIC TX-LR42E5
SERVICE MODE AND VOLTAGE ADJUSTMENTS
How to
enter into Service Mode
While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds.
While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds.
Contents
of adjustment mode
# Value is shown as a hexadecimal number.
# Preset value differs depending on models.
# After entering the adjustment mode, take note of the value in each item before starting adjustment.
# Value is shown as a hexadecimal number.
# Preset value differs depending on models.
# After entering the adjustment mode, take note of the value in each item before starting adjustment.
How to
exit
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
SRV-TOOL
How to access
1. Select [SRV-TOOL] in Service Mode.
2. Press [OK] button on the remote control.
How to access
1. Select [SRV-TOOL] in Service Mode.
2. Press [OK] button on the remote control.
Display
of SOS History
SOS History (Number of LED blinking ) indication.
From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment.
This indication except 2nd and 1st occurrence after shipment will be cleared by [Self-check indication and forced to factory shipment setting].
POWER ON TIME/COUNT
Note : To display TIME/COUNT menu, highlight position, then press MUTE for 3sec.
Time : Cumulative power on time, indicated hour : minute by decimal
Count : Number of ON times by decimal
Note : This indication will not be cleared by either of the self-checks or any other command.
Exit
Disconnect the AC cord from wall outlet.
SOS History (Number of LED blinking ) indication.
From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment.
This indication except 2nd and 1st occurrence after shipment will be cleared by [Self-check indication and forced to factory shipment setting].
POWER ON TIME/COUNT
Note : To display TIME/COUNT menu, highlight position, then press MUTE for 3sec.
Time : Cumulative power on time, indicated hour : minute by decimal
Count : Number of ON times by decimal
Note : This indication will not be cleared by either of the self-checks or any other command.
Exit
Disconnect the AC cord from wall outlet.
Self
Check Mode
1. Press the ‘MENU’ button (on the remote control) and the ‘VOL DOWN’ button on the LCD panel.
2. Press ON/OFF button on the panel to Exit.
Hotel Mode Adjustment
1. Press the ‘VOLUME DOWN’ button on the TV panel and simultaneously press the INPUT button on the remote control 3 times to enter Hotel Mode.
2. Set Hotel mode ‘on/off’, then press ‘EXIT’ to come out.
1. Press the ‘MENU’ button (on the remote control) and the ‘VOL DOWN’ button on the LCD panel.
2. Press ON/OFF button on the panel to Exit.
Hotel Mode Adjustment
1. Press the ‘VOLUME DOWN’ button on the TV panel and simultaneously press the INPUT button on the remote control 3 times to enter Hotel Mode.
2. Set Hotel mode ‘on/off’, then press ‘EXIT’ to come out.
How to enter to Hotel
Mode
Access command to the Hotel mode setup menu. In order to display the Hotel mode setup menu, please enter the following command (within 2 second). [TV] : Vol [Down] + [REMOTE] : INPUT (3 times).
Access command to the Hotel mode setup menu. In order to display the Hotel mode setup menu, please enter the following command (within 2 second). [TV] : Vol [Down] + [REMOTE] : INPUT (3 times).
To exit the Hotel
mode setup menu Disconnect AC power cord from wall outlet
Troubleshooting
Use the self-check function to test the unit.
1. Checking the IIC bus lines
2. Power LED Blinking timing
Check of the IIC bus lines
How to access
Self-check indication only:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control for more than 3 seconds.
Self-check indication and forced to factory shipment setting:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.
Exit
Disconnect the AC cord from wall outlet.
Use the self-check function to test the unit.
1. Checking the IIC bus lines
2. Power LED Blinking timing
Check of the IIC bus lines
How to access
Self-check indication only:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control for more than 3 seconds.
Self-check indication and forced to factory shipment setting:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.
Exit
Disconnect the AC cord from wall outlet.
Power LED
Blinking timing chart
When an abnormality occurs, the protection circuit will operate and reset the unit to stand by mode. During this time, the defective block can be identified by the number of blinking times of the Power LED on the front panel of the unit as follow:
When an abnormality occurs, the protection circuit will operate and reset the unit to stand by mode. During this time, the defective block can be identified by the number of blinking times of the Power LED on the front panel of the unit as follow:
LED BLINKING CODES
Name
|
Factor
|
R_LED Blink
|
BL_SOS
|
SOS from PANEL inverter
|
1
|
POWER_SOS
|
SOS from POWER Curcuit
|
3
|
SOUND_SOS
|
SOS from audio AMP
|
9
|
Voltage
chart of A-board
Set A-Board to a dummy set and check the satisfaction with the specified voltage
Power Supply Name
|
Measurement Point
|
Specification
|
SUB1.1V
|
TP8100
|
1.10V - 1.22V
|
SUB1.5V
|
TP8101
|
1.435V - 1.585V
|
SUB1.8V
|
TP8700
|
1.7V -1.9V
|
SUB3.3V
|
TP5400
|
3.17V - 3.43V
|
SUB5V
|
TP5420
|
4.95V - 5.65V
|
USB5V
|
TP5440
|
4.80V - 5.25V
|
PNL12V
|
TP4004 or TP4005
|
11.45V ± 12.55V
|
Voltage
chart of P-board
Set P-Board to a dummy load and check the satisfaction with the specified
voltage
Voltage
|
Test Point
|
Step 1
|
Step 2
|
24V (PANEL)
|
TP7512 or TP7513
|
< 1V
|
24V ± 1.2V
|
16V
|
TP7508 or TP7514
|
< 1V
|
16.1V ± 0.6V
|
5VS
|
TP7412 or TP7507
|
5.3V ± 0.1V
|
5.3V ± 0.1V
|
PFC
|
TP7201 or TP7202
|
< 340V
|
390V ± 15V
|
