REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Friday 8 March 2019

PANASONIC TX-32LMD70FA - TX-32LMD71FA – TX - 32LMD72FA - TX-26LMD70A - TX-26LMD70FA -TX-26LMD71FA LED BLINKING ERROR CODES AND SERVICE MODE

PANASONIC TX-32LMD70FA - TX-32LMD71FA – TX - 32LMD72FA - TX-26LMD70A - TX-26LMD70FA -TX-26LMD71FA LED BLINKING ERROR CODES AND SERVICE MODE

PANASONIC TX-32LMD70FA - TX-32LMD71FA – TX - 32LMD72FA  - TX-26LMD70A - TX-26LMD70FA -TX-26LMD71FA  LED BLINKING ERROR CODES AND SERVICE MODE 
Self Check
Self-check is used to automatically check the bus lines and hexadecimal code of the TV set. To enter Self-Check mode, keep pressing the down (-/v) button on the TV set and press the STATUS button on the remote control. To exit Self Check, switch off the TV set at the power button.
Power LED blinking timing chart
When abnormality has occurred the unit, the protection circuit operates and reset to the stand by mode. At this time, the defective block can be identified by number of blinking of the Power LED on the front panel of the unit.
 
Blinking times
Contents
Check point
1

INVERTER_SOS

LCD PANEL
DG BOARD
2
FAN_SOS
DG BOARD
3

SOS

DG BOARD
P BOARD
4
DTV_9V
DG BOARD
5
MAIN_9V
DG BOARD
6

SUB_5V

DG BOARD
V BOARD
7
MAIN_5V
DG BOARD
8
MAIN_3.3V
DG BOARD
9
SOUND_SOS
DG BOARD
10
HQ1L_SOS

DG BOARD

Service Mode Function
MPU controls the functions switching for each IICs through IIC bus in this chassis. The following setting and adjustment can be adjusted by remote control in Service Menu
How to enter SERVICE
While pressing (-/v) button on TV unit, press ‘0’ on the remote control for 3 times within 2 seconds.
Note:
To exit from Service mode, press the exit button on remote cont
Key Command
# Press the 3/4 button to change the adjustment values or function.
# Press the 1/2 button to step up/down through the functions and adjustments
# Press the numerical button VOLUME (+/-) to change option item.
# Press the OK button after each adjustment has been made to store the required values.
Adjustment Method
Subcontrast adjustment
1. Receive PAL colour bar (100% white) RF signal.
2. Enter “Contrast” adj. In SERVICE mode.
3. Start adjusting by using Yellow Key.
4. If the adjustment finished normally, the letter of Contrast will change from red
to black
White Balance adjustment
1. Procedure basically performs checking using the production software and
make automatic adjustment using external computer.
2. It adjusts in the mode of : Colour balance Normal as follows.
Viewing Mode Dynamic
32LMD70A
WHITE Normal
x: 0,2860 ± 0,010
y: 0,3090 ± 0,010
GRAY Normal
x: 0,2860 ± 0,010
y: 0,3120 ± 0,010
32LMD70FA
WHITE Normal
x: 0,2860 ± 0,010
y: 0,2960 ± 0,010
GRAY Normal
x: 0,2860 ± 0,010
y: 0,3020 ± 0,010
Setting Inspection
Voltage Confirmation
Confirm the following voltages:
P board
Sub_5V > TP861>  P4, pin 12,13
Panel 5/12V > TP857 > P4, pin 22,23
15V_Audio > TP856 > C3861
9V_Header > TP864 > P4, pin 7,6
STBY_5V > TP863 > P4, pin 16
24V_INV > TP853 > P2, pin1,2,3,4
24V_INV > TP852 > C865
DG board
DTV9V > TP5700 > 9V +/- 0,25V
SUB5V > TP5701 > 5V +/- 0,25V
SUB3,3V > TP5600 > 3,3V +/- 0,25V
MAIN9V > TP5706 > 9V +/- 0,25V
STB5V > TP5702 > 5V +/- 0,25V
SOUND15V > TPS15 > 15V +/- 0,25V
Chassis Board Layout


DG-Board
Global Core, HDMI, IDTV Processor, D/A Converter, AV Connector, Analog tuner, Digital tuner, AV Switch
G-Board
Side AV Connector
P-Board
Main Input, Power Supply, Main Switch
V-Board
Remote Receiver, LED IR, Cats