Thursday, October 08, 2015

PANASONIC TH-32A300M SERVICE MODE AND POWER SUPPLY CIRCUIT

PANASONIC TH-32A300

LED TV

SERVICE MODE AND POWER SUPPLY CIRCUIT 

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.
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].
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.
How to enter to 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, please enter the following command (within 2 second). [TV] : Vol [Down] + [REMOTE] : INPUT (3 times)
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:
R_LED Blink
Factor
PCB Name
1


SOS from LD DRIVER


A-Board
P-Board
LD Driver
3

TCON power down

A-Board
TCON-Board
9
SOS from audio AMP
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.
Power Supply Name
Measurement Point
Specification
SUB1.8V
TP8705
1.74 - 1.90
SUB1.2V
TP8704
1.14 - 1.26
SUB3.3V
TP8703
3.19 - 3.46
SUB5V
TP8702
4.9 - 5.1
STB5V
TP5400
4.9 - 5.5
PNL12V
TP8300
11.5 - 12.5

General precautions
1. Do not press panel surface to avoid blue spot on the panel display.
2. Do not use hard cloth or rub the surface too hard. This may cause scratches on the surface.
3. Take care not to subject the TV’s surface to water or detergent. Any liquid (including pets urine) if enters the product could lead to TV failure.
4. Take care not to subject the surface to insect repellent, solvent, thiner or other voiltile substances. This may degrade surface quality or cause peeling of the paint.
5. The surface of the display panel is specially treated and may be easily damaged. Take care not to tap or scratch with your fingernail or other hard objects.
POWER SUPPLY CIRCUIT 
CLICK ON THE IMAGE TO ZOOM IN 

Voltage chart of P-board
Set P-Board to a dummy set and check the satisfaction with the specified voltage as following table.
Voltage
Test Point
Operate
STBY
5.3V
TP7501
5.3 ± 0.20V
5.3 ± 0.20V
16V
TP7410/ TL7411/ TP-7412
15.8 ± 0.5 V

24V
TP7511/ TP7512
24V ± 1.2 V