Technical description and composition of the TELEFUNKEN TF-LED32S54T2 TV, type of panel and modules used. Module composition.
Composition Specifications
TELEFUNKEN TF-LED32S54T2
LCD TV LED TF-LED32S54T2 | Year of manufacture: 2017
Screen diagonal: 31.5" (80 cm)
Screen Format: 16:9
Resolution: 1366x768
LCD panel type: V320BJ6-Q01
LED backlight: Yes
Support HD: 720p HD
Brightness: 250 cd/m2
Contrast: 1200:1
Viewing Angle: 178°
Pixel response time: 8 msec
Progressive scan: Yes
Digital tuner: DVB-T, DVB-T2, DVB-C
Number of channels: 799
Teletext: there is
Multimedia: MP3, MPEG4, Xvid, MKV, JPEG
Sound stereo: there is
Sound power: 12W (2x6W)
Acoustics: two speakers
Interface: component, VGA, HDMI x3, USB x2
Headphone jack: yes
TV weight: Without stand: 4.2 kg
TELEFUNKEN LED Model: TF-LED32S54T2
Chassis/Version: CV3463H-Q42
Panel: V320BJ6-Q01
LED driver (backlight): integrated into MainBoard
PWM LED driver: SO-8
MOSFET LED driver: TO-252
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: TO-252
MainBoard: CV3463H-Q42
IC MainBoard: SPI Flash: 25Q64
Tuner: NoName
General advice about LCD LED TV repair
Possible problems
- TELEFUNKEN TF-LED32S54T2 TV set doesn't turn on at all. No response to remote control or front panel controls. Indicator lights do not turn on or blink.
First of all in such cases you should check the operability of the common switching power supply (CGPS), AC/DC converter of the mains voltage. All elements of the source in this model of TV are located on the MainBoard CV3463H-Q42. It is then necessary to measure its output voltages and, if not, check the power switches (TO-252) and rectifier diodes of the converters for possible short circuits.
If there is a breakdown in the secondary circuits, the inverter may be short-circuited, and if there is a short in the primary circuit elements, the mains fuse usually blows.
Mos-Fet switches used in switching power supplies usually fail due to the failure of other elements that can take it out of key mode, or cause it to exceed the maximum current or voltage. These may be the circuits feeding the PWM controller, the damping or frequency-retaining circuits, or the negative feedback elements in the stabilization circuit. PWM controllers (PWM) PWM SOT23-6, in the absence of external damage and short circuits between the pins, are checked by replacing with known good ones.
- No picture, sound is present, remote control responds. Or the image may appear for a second and then disappear at once.
In some of these cases the failure is caused by the absence of display backlight. More often the cause is a breakage of the LEDs, or poor contact in the connectors of the boards, less often the LED-driver may be faulty.
To check the LED bars for breakage without disassembling the panel, you can, for example, use a power supply. It is not possible to open the series-connected PN-junctions with a simple multimeter, you will need a voltage of about several tens of volts.
- Indicator on the front panel is blinking, the TV set does not turn on in the working mode, the remote control does not react.
Repair or diagnostic of the CV3463H-Q42 motherboard should be started with checking stabilizers and power converters needed to power the chips and matrix. If necessary, software (software) should be updated or replaced. In some cases, to repair the MB board (SSB) you may need to replace the chips - SPI Flash: 25Q64 with new or known good ones. In cases of BGA technology, defects are usually localized by heating method.
If your TV works normally from external devices, but does not tune to the TV channels, the NoName tuner might be faulty. In these cases first of all you should check if there is a supply voltage on the corresponding pins of the tuner. Also, make sure that the tuner and the processor are communicating via the I2C bus. Sometimes a software malfunction can be the reason for the tuner malfunction.
If your TELEFUNKEN TF-LED32S54T2 has no picture but has sound, often the display backlight of the V320BJ6-Q01 simply does not work. Moreover, in LED TVs usually fail the LEDs inside the panel, less often the LED-driver.
In such cases you can see a faintly visible image when external light hits the screen.
To replace the LEDs requires disassembly of the LCD panel V320BJ6-Q01 - the process requiring a master of experience and expertise. We do not recommend to perform such works by yourself to owners of TV sets and masters who have no experience in LCD panel repair.
READ HOW TO REPAIR THE TV LED BACKLIGHT --------------> HERE.
If there is no image, but backlighting works - the screen becomes slightly lighter when the TV is turned on, and in the open TV you can see the light through the holes in the body of the panel.
In this case the panel may be defective - damage to the strips, cables, for example, as a consequence of moisture after an unsuccessful washing of the screen, the T-CON board (Timing Controller) may be defective. But quite often the CV3463H-Q42 MainBoard is faulty as well and so is the software.
Then first it is necessary to check the panel power supply voltage, fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within normal limits, you need an oscilloscope to trace the LVDS signals from MainBoard CV3463H-Q42, as well as synchronizing signals to the driver stubs.
Filled or unsuccessfully washed LED TV screens can be restored in about half of the cases, usually, if no significant damage was not formed in the plumes and slats of the panel.
Once again, users must be reminded! Trying to repair your TELEFUNKEN TF-LED32S54T2 without proper skill and experience may result in its total uselessness.
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> TELEFUNKEN TF-LED32S54T2, Main: CV3463H-Q42, Panel: V320BJ6-Q01.
Refinement after repair of the backlight. CV3463H-Q42. Information from the master.
Reduce backlight current from 600 mA to 280 mA - Removed two 1.5 Ohm and 1.0 Ohm resistors in the LED current sensor on the CV3463H-Q42 board.
CV3463H-Q42 current backlight
More on MainBoard Repair
The appearance of the MainBoard CV3463H-Q42 is shown in the figure below:
CV3463H-Q42
Main features of TELEFUNKEN TF-LED32S54T2:
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 |
A matrix (LED panel) V320BJ6-Q01 is installed.
To power the LED backlight using a converter, combined with the main board CV3463H-Q42, controlled by a PWM controller SO-8. As the power elements of LED-driver are used as TO-252-type switches.
The power module is combined with MainBoard and is designed as reverse-going converter of AC/DC voltage with PWM SOT23-6 chips and TO-252 type power switches.
MainBoard - the main board (motherboard) is a CV3463H-Q42 module, using SPI Flash chips: 25Q64 and others.
The NoName tuner provides reception of TV programs and tuning to channels.
More technical information about the panel:
Brand : CHIMEI INNOLUX
Model : V320BJ6-Q01
Type : A-Si TFT-LCD, CELL
Diagonal size : 31.5 inch
Resolution : 1366x768, WXGA
Display Mode : MVA, Normally Black, Transmissive
Active Area : 697.685x392.256 mm
Surface : Antiglare (Haze 2%)
Transmissivity : 6.0% (with Polarizer)
Contrast Ratio : 3000:1
Display Colors : 16.7M (6-bit + Hi-FRC)
Response Time : 8.5 (G to G)
Frequency : 60Hz
Signal Interface : LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0 V.
TELEFUNKEN TF-LED32S54T2 LCD TV V320BJ6-Q01 31.5" (80cm) diagonal 16:9 size. The brightness of the screen is 250 cd/m² provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum brightness, is 1200:1. The screen technology of this TV model features LED backlighting.
V320BJ6-Q01 matrix and MainBoard CV3463H-Q42 software implement HD picture quality at 1366x768 pixels resolution in 720p (HD Ready) graphic decomposition standard. Supported multimedia file formats are MP3, MPEG4, Xvid, MKV, JPEG.
The sound system has a capacity of 12 watts (2x6 watt) and is powered by two loudspeakers. NICAM STEREO audio processing system is used.
External interface (connection with other devices) is supported by standard inputs and outputs: antenna input (RF), component, VGA, HDMI x3, USB x2. 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: without stand 738x445x90mm.
TV weight without stand: 4.2 kg.
Warning. The V320BJ6-Q01 is an expensive and fragile part of your TELEFUNKEN TF-LED32S54T2 LED TV.
Do not apply any impact to the glass and do not exert any pressure on the screen surface 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.