Technical description and composition of the SAMSUNG LE32A656A1F TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE32A656A1F
Chassis / Version: N46A
Panel: LTF320HA04
T-CON: 320HAC2LV0.0
Inverter (backlight): SSI320_16B01 REV0.3
PWM Inverter: OZ9966SN
MOSFET Inverter: 2SK4078
Trans Inverter: LT-3216
Power Supply (PSU): BN44-00208A PSLF171501B
PWM Power: MC33067P, FAN7530, FSQ0365RN
MOSFET Power: 11N60 (PFC), 9N50
MainBoard: BN41-00974B MT8226 BN94-01741Y
IC MainBoard: MT8226, MT8291E, NTP-3100, WT61P8, SDP72, D61211GM, HYB25DC256163CE-4, K4T56163QT, TMDS351
Tuner: BN40-00120A TDHG6-K10A
Technical Specifications LE32A656A1F
SAMSUNG LE32A656A1F
General repair guidelines for TV LCD
Possible manifestations of defects
- SAMSUNG LE32A656A1F 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 BN44-00208A power module is faulty. It is necessary to measure its output supply voltage, and in case of their absence, check the serviceability of power switches (11N60 (PFC), 9N50) of converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And during short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits MC33067P, FAN7530, FSQ0365RN are usually checked by replacing with new ones, or obviously working.
- There is no image, there is sound, it reacts to the remote control, channels are switched. In some cases, the image appears when you turn on and immediately disappears.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or inverter. If all the electrolytic capacitors of the filter for the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- 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 BN41-00974B 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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements MT8226, MT8291E, NTP-3100, WT61P8, SDP72, D61211GM, HYB25DC256163CE-4, K4T56163QT, TMDS351 requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
Before replacing the tuner BN40-00120A TDHG6-K10A, if there is no tuning for 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
We recommend LE32A656A1F TV owners repair only to qualified specialists with the necessary work experience! Attempts to repair it yourself without the appropriate knowledge and skills can lead to irreversible negative consequences................
Service manual and schematic diagram SAMSUNG LE32A656A1F Chassis N46A на модели LE32A656A1F, LE37A656A1F, LE40A656A1F, LE46A650A1R, LE46A656A1F, LE52A650A1R, LE52A656A1F, LE37A616A, LE40A616A.
BN41-00974B
BN41-00974B can be used in TVs:
SAMSUNG LE32A556P1 LE32A556P1F (Panel LTF320HA01 A04), SAMSUNG LE37A552 LE37A552P3R (Panel T370HW02 V.4), SAMSUNG LE37A656A1 LE37A656A1FXRU (Panel T370HW02 V6), SAMSUNG LE32A558P3F (Panel LTF320HA01), SAMSUNG LE40A656A1F (Panel LTF400HC01 A02), SAMSUNG LE37A615A3F LE37A615 (Panel T370HW02 V.4), SAMSUNG LE40A556P1F (Panel V400H1-L03 REV C1), SAMSUNG LE40A558P3F LE40A558 (Panel LTF400HA03), SAMSUNG LE32A656A1F (Panel LTF320HA04).
The appearance of the power supply
Main features of the SAMSUNG LE32A656A1F device:
Installed matrix (LCD panel) LTF320HA04.
The matrix control uses the Timing Controller (T-CON) 320HAC2LV0.0.
To power the backlight, an SSI320_16B01 inverter is used, it is controlled by the OZ9966SN PWM controller. A transformer LT-3216 is installed in the inverter converter. As power elements of the inverter, keys of type 2SK4078 are used.
The necessary supply voltages for all nodes of the SAMSUNG LE32A656A1F TV are generated by the BN44-00208A power supply module or its analogs using MC33067P, FAN7530, FSQ0365RN microcircuits and 11N60 (PFC), 9N50 power switches.
MainBoard - the main board (motherboard) is a BN41-00974B module, using the chips MT8226, MT8291E, NTP-3100, WT61P8, SDP72, D61211GM, HYB25DC256163CE-4, K4T56163QT, TMDS351 and others.
The tuner BN40-00120A TDHG6-K10A provides the reception of television programs and tuning to channels.
