TELEFUNKEN LEDModel: TF-LED32S39T2S
Chassis / Version: MSA6285-ZC01-01
Panel: LK315T3HC1K // V320BJ-Q01
LED backlight: LED315D10-07 (B) 30331510219
T-CON: RUNTK DUNTK5524TP ZB
LED driver (backlight): integrated in the PSU
PWM LED driver: OB3363QP
Power supply (PSU): integrated into the MainBoard
Main board: MSA6285-ZC01-01
IC MainBoard: Flash SPI: MX25L4006E, CC-CC: MSH6000A, RT7240
Tuner: NoName
Control: WIFI: IP2000-ZC12-01 (A) 30382000171
TELEFUNKEN TF-LED32S39T2S
General Repair Instructions for LCD LCD TVs
Possible manifestations of faults
- The TELEFUNKEN TF-LED32S39T2S television does not switch on. There is no sign of operability. The front panel lights do not light up or blink, the TV does not respond to buttons on the remote control and control buttons.
In such cases, the common power source, the AC / DC voltage converter, which is combined with the components of the main board MSA6285-ZC01-01, is often defective. It is necessary to measure its output voltages and, in case of absence, to check the correct operation of the power switches and rectification diodes in the converters in order to avoid any faults.
In the event of a semiconductor failure in the secondary circuits, the converter can generally operate normally in emergency short-circuit mode. There is no output voltage. And in the event of a short circuit in the power elements of the primary circuit, as a rule, the main fuse will break and less often the current sensor at the source of the key.
Mos-Fet switches, used in switch mode power supplies, sometimes fail due to a malfunction of any other element that could put it out of service in key mode or create an excess of the maximum admissible parameters of the switch. These can be elements supplying the PWM controller, frequency adjustment or damping circuits, or negative feedback elements in the stabilization circuit. The PWM controllers, in the absence of visible damage or a short-circuit between the terminals, are checked by replacing them with new ones or by operating obviously.
- There is no picture, but there is sound and a reaction to the remote control commands. Or the image appears immediately after being turned on and disappears.
The most likely in these cases is a malfunction of the LED backlight. This can be due to both the power supply of the LEDs, their operating state (failure or breakage) and the violation of the contact connections of the LED strips.
It is impossible to control the line of LEDs connected in series without a special current source. For this reason, it is not prudent to use voltage sources higher than 12V. Then just open the panel and check each indicator separately. Usually, Chinese multimeters powered by 9V will light a single 3 volt LED if you connect the probes in the forward direction, the red probe to the anode and the black to the cathode. In the case of two 6-volt LEDs, the PN junction of its emergency zener diode can be used as a health indicator. In the event of a malfunction of the LED, its Zener diode will either be cut or broken in short circuit.
- The television does not switch on, the indicator signals a standby or operating mode or flashes.
Repairing or diagnosing the MSA6285-ZC01-01 motherboard should begin by checking the stabilizers and power converters needed to power the chips and the array. If necessary, you must update or replace the software (software).
Warning! For users and owners of TF-LED32S39T2S TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend trying self-repair in order to avoid negative consequences which could lead to non complete repairability of the device.
FIRMWARE SPI FLASH -------------------> TELEFUNKEN TF-LED32S58T2S, Main: MSA6285-ZC01-01, Panel: V320BJ-Q01
To reduce the backlight current in LED drivers with an OB3363QP (16-pin) controller, the total resistance of the resistors from pin 5 (ISET) to the housing should be increased proportionally.
Main board repair
The appearance of the MainBoard MSA6285-ZC01-01 is illustrated in the figure below:
MSA6285-ZC01-01Main features of the TELEFUNKEN TF-LED32S39T2S device:
Installed matrix (LED panel) LK315T3HC1K or V320BJ-Q01.
The matrix control uses the Timing Controller (T-CON) RUNTK.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the OB3363QP PWM controller.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit.
MainBoard - the main board (motherboard) is an MSA6285-ZC01-01 module, using SPI Flash chips: MX25L4006E, DC-DC: MSH6000A, RT7240 and others.
The NoName tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: SHARP
Model: LK315T3HC1K
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 697.69x392.26 mm
Surface: Antiglare (Haze 3%), Hard coating (2H)
Contrast Ratio: 6000: 1
Display Colors: 16.7M (8-bit)
Response Time: 7 (G to G)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V