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

Tuesday, 24 December 2019

REPAIRING / SERVICING TV SAMSUNG LE32D403

Technical description and composition of the SAMSUNG LE32D403 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LE32D403 LE32D403E2W
Chassis / Version: U56G / SP03
Panel: LTF320AP13
Lamp backlight: 3 Lamp CCFL
Inverter (backlight): SST320_3UA01 INV32T3UC
PWM Inverter: BD8193MWV
Power Supply (PSU): BN44-00468A IV32HD_BSM PSIV121411C
PWM Power: SEM2106, STR-W6052
MainBoard: BN41-01702A BN94-04416P
IC MainBoard: AT24C256C, 25X40BVSIG, Flash NAND: KFG1GN6W2D (BGA), LVC244A, DRV612, NTP-7411S
Tuner: BN40-00220A
Specifications LE32D403
SAMSUNG LE32D403
General repair guidelines for TV LCD
Possible malfunctions
- The SAMSUNG LE32D403 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
In some of these cases, a fault is detected in the BN44-00468A power module. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches and rectifier diodes in the converters for a short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power 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. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) SEM2106, STR-W6052, in the absence of external damage and a short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
A 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 of the inverter, the breakdown keys and the transformer secondary windings must be ringed in its converter.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not turn on, the indicator signals standby or working mode, or blinks.
Repair or diagnostics of the BN41-01702A motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - AT24C256C, 25X40BVSIG, Flash NAND: KFG1GN6W2D (BGA), LVC244A, DRV612, NTP-7411S. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
If you suspect a malfunction of the BN40-00220A tuner, first of all, you need to verify the correctness of the software, as well as the presence of the necessary voltage levels and impulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
Once again, remind users! Attempts to self-repair a SAMSUNG LE32D403 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!


FIRMWARE FOR  SPI FLASH 25X40 SAMSUNG LE32D403 Main: BN41-01702A



 The appearance of the MainBoard BN41-01702A is shown in the figure below:
BN41-01702A
BN41-01702A can be used in TVs:
SAMSUNG LE40D503F7W LE40D503F7WXRU (Panel LTF400HM05), SAMSUNG UE32D4003BW UE32D4003 (Panel LTJ320AP02-L), SAMSUNG UE40D5003 UE40D5003BW (Panel LD400B2402403 Panel U4002G2EBDUE UD40E2BDUEE
The appearance of the power supply
Main features of the SAMSUNG LE32D403 device:
Installed matrix (LCD-panel) LTF320AP13.
To power the backlight, an inverter SST320_3UA01 is used, it is controlled by the BD8193MWV PWM controller.
The formation of the necessary supply voltages for all nodes of the SAMSUNG LE32D403 TV is carried out by the BN44-00468A power module, or its analogs using SEM2106, STR-W6052 microcircuits.
MainBoard - the main board (motherboard) is a BN41-01702A module, using AT24C256C, 25X40BVSIG, Flash NAND chips: KFG1GN6W2D (BGA), LVC244A, DRV612, NTP-7411S and others.
The tuner BN40-00220A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTF320AP13
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: PVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 5.5%), Hard coating (2H)
Brightness: 300 cd / m²
Contrast Ratio: 3500: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 3 pcs CCFL Embedded (Balance board)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
Posted By: FRANK at 08:03
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