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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Monday 30 March 2020

REPAIR / SERVICING TV TOSHIBA 32WL58R

Technical description and composition of the TOSHIBA 32WL58R TV, type of panel and applicable modules. The composition of the modules.
Toshiba
Model: 32WL58R
Panel: LQ315T3LZ21
Inverter (backlight): RDENC2203TPZB (QKITS0129SNE2)
Trans Inverter: Z1284, Z1285
Power Supply (PSU): PD2171A1 (U002A) & PD2173F
PWM Power: STR-W6765
MainBoard: PD2238E (A5A001511010A) G-LJW3002 & PD2235B
Tuner: ENGF9304GF & ENG39A16GF
Control: CT-90241
Specifications 32WL58R
TOSHIBA 32WL58R
General recommendations for repairing TV LCD
Possible malfunctions
- The TOSHIBA 32WL58R TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
With such manifestations, in most cases, the PD2171A1 power module is faulty. It is necessary to measure the secondary output voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM) STR-W6765. It is checked only by replacement with a known good one.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply to the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
If in diagnosing a malfunction, it is necessary to disable 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 finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the PD2238E motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software).
The malfunction of the ENGF9304GF & ENG39A16GF tuner is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Users and owners of TVs must remember that attempts to repair the TOSHIBA 32WL58R TV independently without the appropriate qualifications and necessary experience can lead to serious negative consequences!

 Service Manuals with Schematic Diagrams 111 pages per model   ------------------>    32WL56R, 32WL56R, 37WL56R, 37WL56R, 27WL56R, 27WL56R, 32WL58R, 32WL58R, 37WL58R, 37WL58R, 42WL58R, 42WL58R, 32WLT58, 37WLT58, 42WLT58







Main features of the TOSHIBA 32WL58R device:
Installed matrix (LCD panel) LQ315T3LZ21.
To power the backlight used inverter RDENC2203TPZB. The transformer Z1284, Z1285 is installed in the inverter converter.
The necessary supply voltages for all nodes of the TOSHIBA 32WL58R TV are generated by the PD2171A1 power module or its analogs using STR-W6765 microcircuits.
MainBoard - the main board (motherboard) is a PD2238E module.
Tuner ENGF9304GF & ENG39A16GF provides the reception of television programs and tuning to channels.
Information from an alternative source:
TOSHIBA 32WL58R
Motherboard: PD2238E (A5A001511010A) G-LJW3002, AV1: PD2235B-1, Tuner: ENGF9304GF & ENG39A16GF, FRONT AV: PD2235B-2, PC HDMI: PD2235B-7, Card Reader: PD2305A (A5A001591010)
Invertor: RDENC2203TPZB (QKITS0129SNE2), Tr-r: Z1284 and Z1285,
PSU: PD2171A1 (U002A), SUB
PSU: PD2173F
Remote control: CT-90241


Additional technical information about the panel:
Brand: SHARP
Model: LQ315T3LZ21
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
Surface: Antiglare (Haze 23%), Hard coating (2H), Antireflection
Brightness: 500 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (8-bit)
Response Time: 12/12 (Tr / Td)
Frequency: 60Hz
Lamp Type: 18 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 37 pins
Voltage: 5.0V

Brand: TOSHIBA, Model: 32WL58R.
Shortly from the TV: LCD, 32 ", 1366x768, 720p HD, sound: 20W, HDMI connectors: 2.
The composition includes MainBoard PD2238E (A5A001511010A) G-LJW3002 & PD2235B and LCD panel (matrix) LQ315T3LZ21.
Power Supply Unit (PSU) PD2171A1, PD2173F Power Supply.

TOSHIBA 32WL58R LCD TV with LQ315T3LZ21 LCD display, 32 "(81 cm) diagonal size in 16: 9 format. 500 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 800: 1. It is possible to view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation takes place in standard Arti 480i, 480p, 576i, 576p, 720p, 1080i Supported media file formats: MPEG4, JPEG.
The power of the acoustic system of sound 20 W (2x10 W) provide two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV x2, audio x7, S-Video x2, component x2, VGA, HDMI x2. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768.
The power consumed by the TV in the operating mode from the network is 155 watts.
Overall dimensions: with stand 794x630x300 mm, without stand 794x576x99 mm.
TV Weight: with stand: 21.5 kg, without stand: 17.6 kg.
Attention! The LQ315T3LZ21 panel of the TOSHIBA 32WL58R LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!
Posted By: FRANK at 05:22
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