Composition
Specifications
TELEFUNKEN TF-LED32S95T2
LCD TV LED TF-LED32S95T2 | Year of manufacture: 2019
Screen diagonal: 31.5" (80 cm)
Aspect ratio: 16:9
Resolution: 1366x768
LED backlight: Yes
Support HD: 720p HD
Brightness: 220 cd/m2
Contrast: 3000:1
Viewing Angle: 160°
Pixel response time: 10 ms
Progressive scan: Yes
Digital tuner: DVB-T, DVB-T2, DVB-C
Number of channels: 600
Teletext: there is
Multimedia: MP3, WMA, DivX, MKV, JPEG
Sound stereo: there is
Sound power: 16W (2x8W)
Acoustics: two speakers
Interface: AV, HDMI x2, USB
Headphone jack: yes
TV weight: 3.6 kg
Dimensions: with stand 735x475x185 mm
without stand 735x435x75mm
Find out more...
TELEFUNKEN TF-LED32S95T2
TELEFUNKEN LED
Model: TF-LED32S95T2
Chassis/Version: MS36639-ZC01-01
Panel: V320BJ8-Q01-C1
LED driver (backlight): integrated into MainBoard
PWM LED driver: OB3350CP
MOSFET LED driver: TO-252
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: TO-252
MainBoard: MS36639-ZC01-01
IC MainBoard: SPI Flash: 25Q64CSG
MainBoard: DVB-T2 & SAT
General advice about LCD LED TV repair
Possible problems
- TELEFUNKEN TF-LED32S95T2 does not turn on, indicators on the front panel are not glowing or blinking. TV set doesn`t respond on remote control.
The problem in such cases should be looked for in the elements of power supply source - AC/DC converter, which is located on the MainBoard MS36639-ZC01-01. You should measure its output voltages and, in case of their absence, check the power switches (TO-252) and the rectifier diodes for possible short circuits in the converters.
With any breakdown of semiconductors in the secondary circuits, the inverter can usually operate normally in the emergency short-circuit mode. There are no output voltages in this case. And when a short circuit occurs in the power elements of the primary circuit, as a rule, the mains fuse and rarely the current sensor at the source of the switch break down.
Breakdown of power switches (MosFet) in pulse sources is sometimes caused by faults in other circuit elements, for example, in the circuits supplying the PWM controller, frequency-retaining or damping circuits, as well as in the negative feedback (negative feedback) stabilization circuits. PWM regulators (PWM) PWM SOT23-6, if they do not have visible case damage and outright short circuits between pins, are usually checked by replacement.
- No picture, sound, there is, the remote control responds. Or just after switching on for a second the image can appear and then disappear.
Often in such cases there is no backlighting of the LED panel. Often the cause is a faulty LED (breakage, short circuit, etc.), or connectors of the bars (strings), less often faulty is the LED-driver.
It is impossible to check LED strips for breakage without disassembling the panel using multimeter or tester. For this purpose, you need to open all the series-connected PN-junctions and will need a voltage of about tens of volts, and ideally - a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters tend to light up a single 3 volt LED slightly in the forward direction. In the case of twin 6 volt LEDs, the PN junction of its safety regulator may be a good indicator. In faulty LEDs the regulator will either be open or broken in the short circuit.
READ HOW TO REPAIR THE TV LED BACKLIGHT --------------> HERE.
- The TV does not turn on, the LED indicates standby or operation mode, or blinks.
Repair or diagnosis of the motherboard MS36639-ZC01-01 should begin with checking the stabilizers and power converters needed to power the chips and matrix. If necessary, the software (software) should be updated or replaced. Often the MB board (SSB) has to be replaced if it has complex faults that are hard to detect. If you try to repair it, check its elements - SPI Flash: 25Q64CSG and replace faulty chips with new ones. Some faults may be associated with the use of modern Main Board BGA soldering technology. Usually such defects are detected by local heating of the chip.
Before replacing the DVB-T2 & SAT tuner, if there is no tuning to the channels, you must first check the software and the supply voltage on its pins. Also make sure that the tuner and the processor can communicate via the I2C bus.
Warning to the users! Self repair of your TELEFUNKEN TF-LED32S95T2 without proper skill and experience may result in its complete unrepairable condition.
Finishing up after repairing the backlight. MS36639-ZC01-01, OB3350CP. Information from the master.
Reduce backlight current from 560 mA to 350 mA - removed one of the 1.5 Ohm resistors (PR56) in the current sensor (PR55-PR57) of the driver board MS36639-ZC01-01.
READ HOW TO REPAIR THE TV LED BACKLIGHT --------------> HERE.
More on MainBoard Repair
The appearance of the MainBoard MS36639-ZC01-01 is shown in the figure below:
MS36639-ZC01-01
Main features of the TELEFUNKEN TF-LED32S95T2:
A matrix (LED panel) V320BJ8-Q01-C1 is installed.
A converter, combined with the main board MS36639-ZC01-01, controlled by the PWM controller OB3350CP, is used to power the backlight LEDs. As the power elements of the LED driver are used as TO-252-type switches.
The power module is combined with MainBoard and is designed as reverse-going AC/DC converter with PWM SOT23-6 chips and TO-252 type power switches.
MainBoard - motherboard is MS36639-ZC01-01 module, with SPI Flash chips: 25Q64CSG and others.
The DVB-T2 & SAT tuner allows you to receive TV programs and tune to channels.
PWM SMPS in SOT-23-6, SOT-26, TSOP-6 packages
In
the circuitry of modern switching power supplies (SMPS), PWM
controllers made in small-sized planar packages with six terminals have
gained wide popularity. The enclosure type designation can be SOT-23-6,
SOT-23-6L, SOT-26, TSOP-6, SSOT-6. The appearance and arrangement of the
pins are shown in the figure below. In this case, the code marking
LD7530A is shown on the left fragment of the picture.
Pin assignment:
1 - GND. (Common wire).
2
- FB. (FeedBack - Feedback). Input for controlling the duration of
pulses with a signal from the output voltage. Sometimes it can be
labeled COMP (input comparator).
3 - RI / RT / CT / COMP / NC -
Depending on the type of microcircuit, it can be used for a
frequency-setting RC circuit (RI / RT / CT), or for organizing
protection, as an input of a PWM trip comparator at a threshold value at
its input, specified in the document. In some types of microcircuits,
this input may not be used in any way (NC - No Connect).
4 - SENSE, otherwise CS (Current Sense) - Input from the current sensor at the source of the key.
5 - VCC - Input voltage supply and start of the microcircuit.
6 - OUT (GATE) - Output for controlling the gate (Gate) of the key.
Functionally,
these regulators work on the principle of the previously popular xx384x
PWM microcircuits, which have proven themselves well in terms of
reliability and stability.
Some difficulties often arise when
replacing or choosing an analog for such PWM regulators due to the use
of code markings in the designation of the type of microcircuits. The
situation is complicated by a large number of component manufacturers
who do not always provide documentation to the mass access, just as not
all manufacturers of finished devices supply repair service centers with
diagrams, so repairmen often have to study real circuit solutions by
installed components and wiring connections directly on the board.
In
practice, PWM microcircuits and the marking code EAxxx and Eaxxx are
often found. Official documentation for them was not found in the public
domain, but discussions on the forums and pieces of pictures from PDF
from System General, which publishes them as SG6848T and SG6848T2, have
survived. The drawing is here placed left .
For the attention of the masters, here below are PDF datasheet tables
compiled from information available on the Internet and PDF documents
for the selection of analogues types when replacing the most common
six-legged planar PWM with pinout pins: pin1 - GND, pin2 - FB (COMP),
pin4 - Sense, pin5 - Vcc, pin6 - OUT ...
Their main difference is the application and purpose of pin 3.
| Name | Part Number | Fabricant | Marking |
|---|---|---|---|
| SG6849 | SG684965TZ | Fairchild / ON Semi | BBxx |
| SG6849 | SG6849-65T, SG6849-65TZ | System General | MBxx EBxx |
| SGP400 | SGP400TZ | System General | AAKxx |
PWM controllers (PWM) with a 95-100 kOhm resistor on pin 3.
When
applying the PWM listed below, the frequency should be set with the RT
(RI) resistor from pin 3 to ground. Usually its nominal value is chosen
95-100 kOhm for a frequency of 65-100 KHz. For more details, see the
here below attached documentation. PDF files are packed in RAR.
| Name | Part Number | Fabricant | Marking |
|---|---|---|---|
| AP3103A | AP3103AKTR-G1 | Diodes Incorporated | GHL |
| AP8263 | AP8263E6R, A8263E6VR | AiT Semiconductor | S1xx |
| AT3263 | AT3263S6 | ATC Technology | 3263 |
| CR6848 | CR6848S | Chip-Rail | 848H16 |
| CR6850 | CR6850S | Chip-Rail | 850xx |
| CR6851 | CR6851S | Chip-Rail | 851xx |
| FAN6602R | FAN6602RM6X | Fairchild / ON Semi | ACCxx |
| FS6830 | FS6830 | FirstSemi | |
| GR8830 | GR8830CG | Grenergy | 30xx |
| GR8836 | GR8836C, GR8836CG | Grenergy | 36xx |
| H6849 | H6849NF | HI-SINCERITY | |
| H6850 | H6850NF | HI-SINCERITY | |
| HT2263 | HT2263MP | HOT-CHIP | 63xxx |
| KP201 | Kiwi Instruments | ||
| LD5530 | LD5530GL LD5530R | Leadtrand | xxt30 xxt30R |
| LD7531 | LD7531GL, LD7531PL | Leadtrend | xxP31 |
| LD7531A | LD7531AGL | Leadtrend | xxP31A |
| LD7535/A | LD7535BL, LD7535GL, LD7535ABL, LD7535AGL | Leadtrend | xxP35-xxx35A |
| LD7550 | LD7550BL, LD7550IL | Leadtrend | xxP50 |
| LD7550B | LD7550BBL, LD7550BIL | Leadtrend | xxP50B |
| LD7551 | LD7551BL/IL | Leadtrend | xxP51 |
| LD7551C | LD7551CGL | Leadtrend | xxP51C |
| NX1049 | XN1049TP | Xian-Innuovo | 49xxx |
| OB2262 | OB2262MP | On-Bright-Electronics | 62xx |
| OB2263 | OB2263MP | On-Bright-Electronics | 63xx |
| PT4201 | PT4201E23F | Powtech | 4201 |
| R7731 | R7731GE/PE | Richtek | 0Q= |
| R7731A | R7731AGE | Richtek | IDP=xx |
| SD4870 | SD4870TR | Silan Microelectronics | 4870 |
| SF1530 | SF1530LGT | SiFirst | 30xxx |
| SG5701 | SG5701TZ | System General | AAExx |
| SG6848 | SG6848T, SG6848T1, SG6848TZ1, SG6848T2 | Fairchild / ON Semi | AAHxx EAxxx |
| SG6858 | SG6858TZ | Fairchild / ON Semi | AAIxx |
| SG6859A | SG6859ATZ, SG6859ATY | Fairchild / ON Semi | AAJFxx |
| SG6859 | SG6859TZ | Fairchild / ON Semi | AAJMxx |
| SG6860 | SG6860TY | Fairchild | AAQxx |
| SP6850 | SP6850S26RG | Sporton Lab | 850xx |
| SP6853 | SP6853S26RGB, SP6853S26RG | Sporton Lab | 853xx |
| SW2263 | SW2263MP | SamWin | |
| UC3863/G | UC3863G-AG6-R | Unisonic Technologies Co | U863 U863G |
| XN1049 | XN1049, XN1049TP | Innuovo Microelectronics | 49 xxx |
PWM controllers that use pin 3 differently.
When
using the following PWM (PWM controllers), you should pay attention to
pin 3, which can be used to organize protection - thermal or from
overvoltage of the input voltage.
The frequency can be fixed at 65kHz, or set by the value of the capacitor at pin 3.
When replacing any microcircuits with analogs, carefully study the documentation. PDF files are packed in a RAR archive.
| Name | Part Number | Fabricant | Marking |
|---|---|---|---|
| AP3105/V/L/R | AP3105KTR-G1, AP3105VKTR-G1, AP3105LKTR-G1, AP3105RKTR-G1 | Diodes Incorporated | GHN GHO GHP GHQ |
| AP3105NA/NV/NL/NR | AP3105NAKTR-G1, AP3105NVKTR-G1, AP3105NLKTR-G1, AP3105NRKTR-G1 | Diodes Incorporated | GKN GKO GKP GKQ |
| AP3125A/V/L/R | AP3125AKTR-G1, AP3125VKTR-G1, AP3125LKTR-G1, AP3125RKTR-G1 | Diodes Incorporated | GLS GLU GNB GNC |
| AP3125B | AP3125BKTR-G1 | Diodes Incorporated | GLV |
| AP3125HA/HB | AP3125HAKTR-G1, AP3125HBKTR-G1 | Diodes Incorporated | GNP GNQ |
| AP31261 | AP31261KTR-G1 | Diodes Incorporated | GPE |
| AP3127/H | AP3127KTR-G1, AP3127HKTR-G1 | Diodes Incorporated | GPH GSH |
| AP3301 | AP3301K6TR-G1 | Diodes Incorporated | GTC |
| FAN6862 | FAN6862TY | Fairchild / ON Semi | ABDxx |
| FAN6863 | FAN6863TY, FAN6863LTY, FAN6863RTY | Fairchild / ON Semi | ABRxx |
| HT2273 | HT2273TP | HOT-CHIP | 73xxx |
| LD7510/J | LD7510GL, LD7510JGL | Leadtrend | xxP10 xxP10J |
| LD7530/A | LD7530PL, LD7530GL, LD7530APL, LD7530AGL | Leadtrend | xxP30 xxxP30A |
| LD7532 | LD7532GL | Leadtrend | xxP32 |
| LD7532A | LD7532AGL | Leadtrend | xxP32A |
| LD7532H | LD7532HGL | Leadtrend | xxP32H |
| LD7533 | LD7533GL | Leadtrend | xxP33 |
| LD7536 | LD7536GL | Leadtrend | xxP36 |
| LD7536R | LD7536RGL | Leadtrend | xxP36R |
| LD7537R | LD7537RGL | Leadtrend | xxP37R |
| LD7539C GL | LD7539C GL | Leadtrend | xxP39C |
| ME8204 | ME8204M6G | MicrOne | ME8204xx |
| NCP1250 | NCP1250ASN65T1G, NCP1250BSN65T1G, NCP1250ASN100T1G, NCP1250BSN100T1G | ON Semiconductor | 25xxxx |
| NCP1251 | NCP1251ASN65T1G, NCP1251BSN65T1G, NCP1251ASN100T1G, NCP1251BSN100T1G | ON Semiconductor | 5xxxxx |
| OB2273 | OB2273MP | On-Bright-Electronics | 73xx |
| R7735 | R7735AGE, R7735HGE, R7735GGE, R7735RGE, R7735LGE | Richtek | |
| UC3873/G | UC3873-AG6-R, UC3873G-AG6-R | Unisonic Technologies | U873 U873G |
TELEFUNKEN TF-LED32S95T2 TV with V320BJ8-Q01-C1 LCD screen measuring 31.5" (80 cm) diagonally in 16:9 aspect ratio. The screen luminance of 220 cd/m² is provided by an LED backlight. Contrast, as the ratio of maximum brightness to minimum brightness, is 3000:1. The screen technology of this TV model features LED backlighting.
V320BJ8-Q01-C1 matrix and software MainBoard MS36639-ZC01-01 implement HD image quality at a resolution of 1366x768 pixels in the standard 720p (HD Ready). Supported formats of multimedia files: MP3, WMA, DivX, MKV, JPEG.
The sound system has a capacity of 16 W (2x8 W), provided by two speakers. NICAM STEREO audio processing system is used.
External interface (connection with other devices) is supported by standard inputs and outputs: antenna input (RF), AV, HDMI x2, USB. There is a headphone output. The digital tuner receives DVB-T, DVB-T2, DVB-C TV channels.
The power supply is used as a part of MainBoard.
Dimensions: with stand 735x475x185 mm, without stand 735x435x75 mm.
TV weight: 3.6 kg.
Warning. The V320BJ8-Q01-C1 is an expensive and fragile part of your TELEFUNKEN TF-LED32S95T2 LED TV.
Avoid any kind of impact on the glass and pressure on the surface of the screen to avoid damaging the LED panel!
Also it is not safe to get liquid on the screen. Sometimes one drop is enough if it drips down the glass onto the cables and the TV becomes unrepairable.