REPAIRING AND NOT THROWING AWAY

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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Friday 4 September 2020

REPAIRING / SERVICING TV PANASONIC TX-R32LE7

Technical description and composition of the PANASONIC TX-R32LE7 TV, panel type and modules used. The composition of the modules.
PANASONIC
Model: TX-R32LE7 TX-32LE7
Chassis / Version: GLP21M
Panel: LTA320WT-L15
T-CON: 320WTC4LV5.2
Inverter (backlight): KLS-S320BCI-M REV.01
PWM Inverter: BD9886FV
MOSFET Inverter: BA662V
Power Supply (PSU): TNP0EP009
PWM Power: MR4040
MOSFET Power: integrated
MainBoard: TNP0EA009 A 9
IC MainBoard: CPU: VCT69XYP, EEPROM: 24C32WP, HDMI: SiI9023CTU-L
Tuner: ENGF7701GF (TNPOEB009 board)
Control: IR: TNP0EV009
TX-32LE7 Specifications
PANASONIC TX-R32LE7
General recommendations for TV LCD repair
Possible manifestations of malfunctions
- The PANASONIC TX-R32LE7 does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
Often in such cases, the TNP0EP009 power supply module is faulty. It is necessary to make sure that its output voltages are available and, if they are completely absent, check the power switches (integrated) and rectifier diodes for a possible short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in an emergency mode of a short circuit, and with a short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key often breaks off.
Mos-Fet power switches used in switching power supplies sometimes fail due to a malfunction of any other elements that can disable it in the key mode, or create an excess of the maximum permissible key parameters. These can be elements supplying a PWM regulator, frequency setting or damper circuits, or elements of negative feedback in the stabilization circuit. MR4040 PWM controllers, in the absence of visible damage or outright short circuits between the terminals, are checked by replacing them with new ones, or known to be working properly.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and immediately disappears
A defect can be caused by problems in the nodes or elements of the display backlight, or in the power supply of lamps or inverter.If all electrolytic capacitors of the filter for the power supply of the inverter are in good order, you should make sure that the lamps are in good working order, then you need to check the converter keys and secondary windings of the transformers.
If, when diagnosing a malfunction, it is required to turn off the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after they are completed, it is imperative to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, does not respond to the remote control.
Repair or diagnostics of the TNP0EA009 motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and the matrix. If necessary, you should update or replace the software (software). Complicated repair of MB (SSB) board is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements of the CPU: VCT69XYP, EEPROM: 24C32WP, HDMI: SiI9023CTU-L. BGA chip faults are usually easy to detect by warm-up.
Before changing the ENGF7701GF tuner (TNPOEB009 board), if it is not possible to tune to TV channels, you should make sure that there are supply voltages that must be measured at the corresponding tuner pins and check the software for correctness. The pulses of data exchange between the tuner and the processor can be monitored with an oscilloscope
Remember! Attempts to self-repair the PANASONIC TX-R32LE7 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!


DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    GLP21M Chassis for models TX-32LE7F, TX-32LE7L, TX-32LE7P (TX-32LE7K), TX-26LE7F, TX-26LE7L, TX-26LE7P (TX-26LE7K?)
 
PANASONIC TX-R32LE7KA - Panel: LTA320WT-L06, T-con: 320WTC2LV3.7, Inverter: SSI320B12.
PANASONIC TX-R32LE7KHA - Panel: LTA320WT-L06, MainBoard: TNP0EA009 A 7, PSU: TNP0EP009 P 9.


https://3.bp.blogspot.com/-cEDOCE9tDSE/X1JEYZVNHDI/AAAAAAABFpY/3rSQTIDF2-sMPpSh0yH6N2kGGEVLS7tDwCK4BGAYYCw/s1600/TNP0EA009_DCE.jpghttps://2.bp.blogspot.com/-9zTaa4rqMqg/X1JEatTrEbI/AAAAAAABFpg/ZhDwt0nf55w5LuxejZhx88tROmzx7icHwCK4BGAYYCw/s1600/TNP0EP009_DCE.jpgThe appearance of the MainBoard TNP0EA009 is shown in the figure below:
TNP0EA009
External view of the power supply
The main features of the PANASONIC TX-R32LE7 device:
Installed matrix (LCD panel) LTA320WT-L15.
Matrix control uses a Timing Controller (T-CON) 320WTC4LV5.2.
The KLS-S320BCI-M inverter is used to power the backlight lamps, it is controlled by the BD9886FV PWM controller. Keys of BA662V type are used as power elements of the inverter.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-R32LE7 TV is carried out by the TNP0EP009 power module, or its analogs using MR4040 microcircuits and integrated power switches.
MainBoard - the main board (motherboard) is a TNP0EA009 module, using CPU: VCT69XYP, EEPROM: 24C32WP, HDMI: SiI9023CTU-L and others.
The ENGF7701GF tuner (TNPOEB009 board) provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320WT-L15
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Frequency: 60Hz
Lamp Type: CCFL
TV PANASONIC TX-32LE7 with LCD display LTA320WT-L15, 32 "(81 cm) 16: 9 format diagonal. Screen brightness of 500 cd / m² backlit by CCFL (EEFL) fluorescent lamps. Contrast as a ratio of maximum brightness to the minimum is 1000: 1.
The LTA320WT-L15 panel and TNP0EA009 firmware enable HD viewing at 1366x768 resolution for 720p graphics resolution (HD Ready). The input analog video signal can be processed in PAL, SECAM, NTSC systems. Graphic processing and formation of a digital signal picture occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i.
Speaker power 16 W (2x8 W) is provided by two speakers. Uses NICAM stereo signal system and Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, S-Video, component, SCART x2, RGB, HDMI. A headphone output is provided for individual listening. To connect a computer or laptop, a VGA (D-Sub 15) connector is used, which supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
Dimensions: with stand 791x615x239 mm, without stand 791x563x107 mm.
TV weight: without stand: 16 kg.
Attention! The LTA320WT-L15 panel of the PANASONIC TX-32LE7 LCD TV is a rather expensive component.
Avoid impacts on glass and pressure on the surface of the screen to avoid irreversible damage to the LCD panel!

Posted By: FRANK at 06:51
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