Sunday, January 03, 2016

PANASONIC TX-LR32E6 Service mode LED blinking codes and voltage adjustments - LED LCD TV Repair - Panasonic Viera LED TV

Category: Led LCD TV repair  

Contents of this article 

  • Service mode 
  • Led blinking code 
  • Hotel mode 
  • Voltage measurement 

PANASONIC TX-LR32E6

Service Mode
How to enter into Service Mode
Purpose
After exchange parts, check and adjust the contents of adjustment mode.
While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds.
Key command
[1] button...Main items Selection in forward direction
[2] button...Main items Selection in reverse direction
[3] button...Sub items Selection in forward direction
[4] button...Sub items Selection in reverse direction
[VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - )
How to exit
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.
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
1. Disconnect the AC cord from wall outlet.
Technical Descriptions
Specification of KEY for DTCP-IP, WMDRM and Widevine
General information:
1. NAND Flash (IC8900) for spare parts has the seed of KEY for each DTCP-IP for DLNA, WMDRM for Netflix and Widevine for CinemaNow.
2. The final KEY data will be generated by Main IC (IC8000) when SELF CHECK was done and are stored in both Main IC (IC8000) and NAND Flash (IC8900).
Replacement of ICs:
When Main IC is replaced, NAND Flash should be also replaced with new one the same time.
When NAND Flash is replaced, Main IC is not necessary to be replaced the same time.
After the replacement of IC, SELF CHECK should be done to generate the final KEY data.
How to SELF CHECK: While pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.
TV will be forced to the factory shipment setting after this SELF CHECK.
DRV Check - USBHDD Check
1. Select [DRV Check - USBHDD Check] in Service Mode.
2. Press [OK] button on the remote control for more than 3 seconds.
Hotel Mode
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.
To exit the Hotel mode setup menu Disconnect AC power cord from wall outlet.
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
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:
Blinking Times
Contents
Check point
1

BACK LIGHT SOS

LCD PANEL
P-Board
7
SUB 3.3V SENSE SOS
A-Board
9

SOUND SOS

A-Board
Speaker
13
EMERGENCY
A-Board

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:
While pressing [VOLUME ( - )] button of the main unit, press [OPTION] button of the remote control three times within 2 seconds.
How to Exit:
Disconnect AC plug from wall outlet.
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:
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.
Measurements and Adjustments
Voltage chart of A-board
Set A-Board to a dummy set and check the satisfaction with the specified voltage as following table.
Power Supply Name
Measurement Point
Specification
PANEL12V
TP4000 / 4001
11.50V - 12.50V
SUB5V
TP5420
4.95V - 5.40V
SUB3.3V
TP5400
3.17V - 3.43V
SUB1.5V
TP8100
1.435V - 1.585V
SUB1.2V
TP8101
1.140V - 1.260V
JP_TU_2.5V
TP5705
2.38V - 2.62V

Voltage chart of P-board
Set P-Board to a dummy load and check the satisfaction with the specified voltage as following table.
Output
Test Point
On
24V
TP7511
24 ± 1.2V
16V
TP7410
16 ± 0.8V
5VS
TP7501
5.3 ± 0.2 V