Thursday, November 12, 2015

PANASONIC TH-48AX670T - TH-55AX670T VIERA LED TV POWER LED BLINKING CODE AND SERVICE MODE

PANASONIC TH-48AX670T - TH-55AX670T 

LED TV 

POWER LED BLINKING CODE AND SERVICE MODE 

SERVICE MODE
How to enter into Service Mode
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.
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].
Exit
1. Disconnect the AC cord from wall outlet.
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.
Troubleshooting Guide
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
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:
LED BLINKING CODES AND CHECK POINTS
Blinking times
Contents & Check point
1
BL_SOS
3
IROM-SOS
6
FPGA_SOS
7
SUB_3.3V
8
SOS
9
SOUND_SOS
10
GCX/FRC/NVT_SOS
11
FAN_SOS
12
BE (sLD8/LD6/PRO4) SOS
13
Emergency SOS

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
CD 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.
Voltage chart of A-board
Set A-Board to a dummy set and check the satisfaction with the specified voltage as following table.
Board
Checked Name
Test Point
Specification
A
PNL12V
TP8720
12V ± 1.2V
A
SUB5V
TP8750
5.17V ± 0.25V
A
SUB3.3V
TP8701
3.39V ± 0.15V
A
HDMI3.3V
TP8751
3.3V ± 0.17V
A
SUB_AI_3.3V
TP2206
3.3V ± 0.17V
A
EU_TU_1.8V
TP5704
1.84V ± 0.1V
A
SUB1.5V
TP8101
1.52V ± 0.08V
A
SUB1.1V
TP8100
1.21 ± 0.06V
A
USB-WiFi
TP8620
5.10 ± 0.20V
A
LNB_PWR_M
TP6703
18V ± 1.0V
A
LNB_PWR_M
TP6703
15V ± 1.5V
A
SUB9V
TP5004
9V ± 0.4V
A
WOL3.3V
TP8640
3.3V ± 0.17V
A
JPN_3.3V
TP5700
3.3V ± 0.17V
A
JPN_1.2V
TP5702
1.22V ± 0.1V
A
SD3.3V
TP8617
3.34V ± 0.17V
A
LNA5V
TP5705
5.0V ± 0.25V
A
JP_TU_2.5V
TP5703
2.53V ± 0.1V
A
DMD_1.1V
TP5703
1.12V ± 0.11V
A
SUB_CI_5V
TP8400
5.0V ± 0.5V
A
USB1
TP8627
5.0V ± 0.25V
A
USB2
TP8615
5.0V ± 0.25V
A
NT2.5V
TP9170
2.52V ± 0.12V
A
NT1.5V
TP9160
1.52V ± 0.07V
A
NT1.1V
TP9150
1.13V ± 0.06V
A
RIORX3.3V
TP4602
3.35V ± 0.17V
A
RIO1.2V
TP4601
1.22V ± 0.06V
A
HDMISW3.3V
TP3707
3.3V ± 0.17V