Technical description and composition of the TELEFUNKEN TF-LED50S7T2 TV, type of panel and applicable modules. The composition of the modules.TELEFUNKEN LED
Model: TF-LED50S7T2
Chassis / Version: CV9202H-T
Panel: CX500DLEDM
LED backlight: V500H1-ME1-TLEM9 LED 4020
LED driver (backlight): integrated into PSU
PWM LED driver: BIT3260
MOSFET LED driver: AOB254
Power Supply (PSU): CVB42001
PWM Power: LD7535 (PWM SOT23-6)
MOSFET Power: SMK1060
MainBoard: CV9202H-T
IC MainBoard: CPU: SPV9202BD (1416-D), DRAM: K4B1G1646G-BCKO, SPI FLASH: Winb25Q64FVSIG, AUDIO: TPA3110LD2
Tuner: ST03WS-2A-E
Technical Specifications TF-LED50S7T2
TELEFUNKEN TF-LED50S7T2
General repair guidelines for TV LCD LED
Possible malfunctions
- The TELEFUNKEN TF-LED50S7T2 TV does not turn on and does not show any signs of operability at all. There is no reaction to either the remote control or the front panel control buttons.
With such manifestations, the CVB42001 power supply module usually fails. It is necessary to measure the secondary output voltages, and if they are absent, check the operability of the power switches of the converters and rectifier diodes for a short circuit probability.
In case of breakdowns of diodes in the secondary circuits, the converter can operate in emergency short circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key 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). 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.
In most cases, the malfunction is caused by the lack of a backlight display. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, it does not respond to the remote control.
Repair or diagnostics of the CV9202H-T 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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - CPU: SPV9202BD (1416-D), DRAM: K4B1G1646G-BCKO, SPI FLASH: Winb25Q64FVSIG, AUDIO: TPA3110LD2 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
It should be remembered! Attempts to independently repair the TELEFUNKEN TF-LED50S7T2 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete failure of the device!
FIRMWARE SPI FLASH ----------------> TELEFUNKEN TF-LED50S7T2, Main: CV9202H-T, Panel: CX500DLEDM
The appearance of the MainBoard CV9202H-T is shown in the figure below:CV9202H-T
CV9202H-T can be used in TVs:
AKAI LEA-39J29P (Panel HF390BGA-C1), BBK 32LEM-1001/T2C (Panel CX315DLEDM), DNS M39DM8 (Panel V390HJ1-P02 Rev C1), ERISSON 32LEE17 (Panel 720p HD 1366x768), FUSION FLTV-32T22 (Panel ST3151A05), FUSION FLTV-28T20 (Panel LCM-SM275TK301 (D0306)), FUSION FLTV-28T22 (Panel TH280L321-04), FUSION FLTV-32T23 (Panel ST3151A04-1 / Ver.2.4), FUSION FLTV-32T20 (Panel V320BK1-PS5 Rev.C7), TELEFUNKEN TF-LED50S7T2 (Panel CX500DLEDM), TELEFUNKEN TF-LED40S28T2 (Panel CX400DLEDM), TELEFUNKEN TF-LED29S30T2 (Panel V290BJ1-XC01 CX290DLEDM), TELEFUNKEN TF-LED40S6T2 (Panel CX400DLEDM).
Main features of the TELEFUNKEN TF-LED50S7T2 device:
Installed matrix (LED-panel) CX500DLEDM.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by a BIT3260 PWM controller. As the power elements of the LED driver, keys of the AOB254 type are used.
The necessary supply voltages for all nodes of the TELEFUNKEN TF-LED50S7T2 television are generated by the CVB42001 power supply module or its analogs using LD7535 microcircuits (PWM SOT23-6) and power switches of the SMK1060 type.
MainBoard - the main board (motherboard) is a CV9202H-T module using CPU chips: SPV9202BD (1416-D), DRAM: K4B1G1646G-BCKO, SPI FLASH: Winb25Q64FVSIG, AUDIO: TPA3110LD2 and others.
The ST03WS-2A-E tuner provides TV reception and channel tuning.