Technical description and composition of the SAMSUNG LE32R71B TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE32R71B
Panel: V320B1-L01 REV.C4 // T315XW02 V.D
T-CON: V320B1-L01-C // T315XW02 V0 05A30-1A
Inverter (backlight): VIT71020.62
Power Supply (PSU): BN96-03775A
PWM Power: VIPer22A (Standby), F9222L (PWM resonant), TDA4863G (PFC)
MOSFET Power: STP20NM60
MainBoard: BN41-00680D
IC MainBoard: S3F866B, SVP-PX56, K4D263238
Tuner: BN40-00079A
Technical Specifications LE32R71B
SAMSUNG LE32R71B
General repair guidelines for TV LCD
Possible manifestations of defects
- SAMSUNG LE32R71B does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
With such manifestations, in some cases, the BN96-03775A power module is faulty. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches and rectifier diodes in the converters for possible breakdown.
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.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency-setting or damper ones, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) VIPer22A (Standby), F9222L (PWM resonant), TDA4863G (PFC), if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
These manifestations can be triggered by a power supply module, or by inverter defects, as well as distortion of the currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the secondary windings of the transformers for an open.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during operations, and after their completion, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights up constantly or blinks.
Repair or diagnostics of the BN41-00680D 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). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - S3F866B, SVP-PX56, K4D263238 with new or obviously good ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
Before replacing the tuner BN40-00079A, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Attention to users! Self-repair of a SAMSUNG LE32R71B TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
SCHEMATIC ----> Samsung LE27S71B, LE32S71B, LE37S71B, LE40S71B Chassis GSM27SE - GSM40SE.
PSU SCHEMATIC ---> BN96-03775A.
SAMSUNG LE32R71W Panel: V315B1-L01 REV.C2, T-CON V315B1-C01;
MAINBOARD: BN41-00680D BN91-01258A;
Power: KTL-SH10005-6002(031-222-3942) BN96-03775A;
INVERTER: I315B1-16A-C001E.
The appearance of the MainBoard BN41-00680D is shown in the figure below:BN41-00680D
BN41-00680D can be used in TVs:
SAMSUNG LE26R71B (Panel T260XW02 V.5), SAMSUNG LE27S71B (Panel V270B1-L01), SAMSUNG LE27S71BS (Panel V270B1-L04), SAMSUNG LE32S71BS LE32S71B (Panel V315B1-L01 Rev.C2 (SAMSUNG LEB) -L01 0T1), SAMSUNG LE32R71B (Panel V320B1-L01 REV.C4), SAMSUNG LE32R72B (Panel T315XW02 V.0).
The appearance of the power supply
Main features of the SAMSUNG LE32R71B device:
Installed matrix (LCD panel) V320B1-L01 REV.C4 or T315XW02 V.D.
The matrix control uses the Timing Controller (T-CON) V320B1-L01-C.
To power the backlight used inverter VIT71020.62.
The necessary supply voltages for all nodes of the SAMSUNG LE32R71B TV are generated by the BN96-03775A power module or its analogs using VIPer22A (Standby), F9222L (PWM resonant), TDA4863G (PFC) microcircuits and STP20NM60 type power switches.
MainBoard - the main board (motherboard) is a BN41-00680D module, using S3F866B, SVP-PX56, K4D263238, and others.
The tuner BN40-00079A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CMO
Model: V320B1-L01
Type: a-Si TFT-LCD, Panel
Diagonal size: 32.0 inch
Resolution: 1366x768, WXGA
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 708.954x398.592 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 75%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V