Panasonic TX-42AR400 Service Manual ▷ View online
TX-42AR400
9
5.1.5.
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].
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].
5.1.6.
Exit
1. Disconnect the AC cord from wall outlet.
5.1.7.
Hotel Mode
1. Purpose
Restrict a function for hotels.
2. Access command to the Hotel mode setup menu.
In order to display the Hotel mode setup menu:
While pressing [VOLUME (-)] button of the main unit,
press [AV] button of the remote control three times within
2 seconds.
While pressing [VOLUME (-)] button of the main unit,
press [AV] button of the remote control three times within
2 seconds.
Then, the Hotel mode setup menu is displayed.
3. To exit the Hotel mode setup menu
Disconnect AC power cord from wall outlet.
4. Explain the Hotel mode setup menu
Item
Function
Hotel Mode
Select hotel mode On/Off
Initial INPUT
Select input signal modes.
Set the input, when each time power is switched on.
Selection :
Off,Analogue,DVB-C,DVB-T,AV1,AV2,HDMI1,
HDMI2
Set the input, when each time power is switched on.
Selection :
Off,Analogue,DVB-C,DVB-T,AV1,AV2,HDMI1,
HDMI2
• Off: give priority to a last memory. However, Euro
model is compulsorily set to TV.
Initial POS
Select programme number.
Selection :
Off/0 to 99
Selection :
Off/0 to 99
• Off: give priority to a last memory.
Initial VOL LEVEL
Adjust the volume when each time power is switched
on.
Selection Range :
Off/0 to 100
on.
Selection Range :
Off/0 to 100
• Off: give priority to a last memory.
Maximum Vol Level Adjust maximum volume.
Range :
0 to 100
0 to 100
Button Lock
Select local key conditions.
Selection :
Off/SETUP/MENU/ALL
Selection :
Off/SETUP/MENU/ALL
• OFF: altogether valid
• SETUP: only F-key is invalid
• SETUP: only F-key is invalid
(Tuning guide (menu) can not be selected.)
• MENU: only F-key is invalid
(only Volume/Mute can be selected.)
• ALL: altogether invalid.
Remote Lock
Select remote control key conditions.
Selection :
Off/SETUP/MENU
Selection :
Off/SETUP/MENU
• OFF: altogether valid.
• SETUP: only Setup menu is invalid.
• MENU: Picture/Sound/Setup menu are invalid.
• SETUP: only Setup menu is invalid.
• MENU: Picture/Sound/Setup menu are invalid.
Hotel Mode USB
Basically after user already setup the hotel mode
according to their criteria, what they need to do is
according to their criteria, what they need to do is
• insert USB (while in hotel mode)
• choose ‘Copy TV to USB’ to copy the setting into
• choose ‘Copy TV to USB’ to copy the setting into
the USB (a file will be created to store the hotel
mode setting in the USB)
mode setting in the USB)
• switch ‘OFF’ the unit
• pull out USB from unit
• pull out USB from unit
To copy the hotel mode setting from USB.
• enter hotel mode
• insert USB
• choose ‘Copy USB to TV’
• follow instruction as shown on the units
• once finish, switch ‘OFF; the unit
• pull out USB from unit
• insert USB
• choose ‘Copy USB to TV’
• follow instruction as shown on the units
• once finish, switch ‘OFF; the unit
• pull out USB from unit
Private Information Select private information for VIERA Cast is Keep or
Reset if Hotel mode is set to [On] when TV power on
Selection :
Keep/Reset
Selection :
Keep/Reset
• Keep: private information for VIERA Cast is keep
• Reset: private information for VIERA Cast is
• Reset: private information for VIERA Cast is
reset
TX-42AR400
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6 Troubleshooting Guide
Use the self-check function to test the unit.
1. Checking the IIC bus lines
2. Power LED Blinking timing
2. Power LED Blinking timing
6.1.
Check of the IIC bus lines
6.1.1.
How to access
6.1.2.
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.
for more than 3 seconds.
6.1.3.
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.
control for more than 3 seconds.
6.1.4.
Exit
Disconnect the AC cord from wall outlet.
6.1.5.
Screen display
TX-42AR400
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6.2.
Power LED Blinking timing chart
1. Subject
Information of LED Flashing timing chart.
2. Contents
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:
defective block can be identified by the number of blinking times of the Power LED on the front panel of the unit as follow:
6.3.
Method of detecting SOS
1. BL_SOS
Detection beginning after one second pass from ‘BL_ON’=ON
2. TV_SOS
Detection beginning after one second pass from ‘AMP_SHUTDOWN’=ON
3. SOUND_SOS
Detection beginning ‘AMP_SHUTDOWN’=ON
Priority
Name
Factor
R_LED Blink
1
BL_SOS
SOS from PANEL inverter
1
2
TV_SOS
TCON power down
3
3
SOUND_SOS
SOS from audio AMP
9
TX-42AR400
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6.4.
LCD Panel test mode
Purpose:
To find the possible failure point where in LCD Panel or Printed Circuit Board when the abnormal picture is displayed.
How to Enter:
How to Enter:
While pressing [VOLUME ( - )] button of the main unit, press [OPTION] button of the remote control three times within 2
seconds.
How to Exit:
seconds.
How to Exit:
Disconnect AC plug from wall outlet.
How to confirm:
How to confirm:
If the abnormal picture is displayed, go into LCD Panel test mode to display the several test patterns.
And then, judge by the following method.
Still abnormal picture is displayed: The cause must be in LCD Panel.
Normal picture is displayed: The cause must be in A board.
Remarks:
And then, judge by the following method.
Still abnormal picture is displayed: The cause must be in LCD Panel.
Normal picture is displayed: The cause must be in A board.
Remarks:
The test pattern is created by the circuit in LCD Panel.
In LCD Panel test mode, this test pattern is displayed unaffected by signal processing for RF or input signal.
If the normal picture is displayed, LCD Panel must be okay and the cause of failure must be in A board.
In LCD Panel test mode, this test pattern is displayed unaffected by signal processing for RF or input signal.
If the normal picture is displayed, LCD Panel must be okay and the cause of failure must be in A board.
6.5.
No Power
First check point
There are following 2 states of No Power indication by power LED.
There are following 2 states of No Power indication by power LED.
1. No lit
2. Red is lit then turns red blinking a few seconds later. (See 6.2.)
2. Red is lit then turns red blinking a few seconds later. (See 6.2.)
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