Technical description and composition of the SAMSUNG UE32ES6557 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE32ES6557 UE32ES6557U
Chassis / Version: U78A / U79A
Panel: LE320CSM-C1
T-CON: V400HK5-CPS1
LED driver (backlight): integrated into PSU
PWM LED driver: SLC5012M
MOSFET LED driver: D5N40, D3N40
Power Supply (PSU): BN44-00517C PD32B1DE_CSM
PWM Power: SSC2S110, PWM SOT23-6
MOSFET Power: D4189, MDD1752
MainBoard: BN41-01807A BN94-05857C BN94-06857C
IC MainBoard: WT61P805, KLM2G1HE3F-B001, K4B2G1646C-HCK0, NTP7412S
Tuner: BN40-00236A
Control: IR: JOY BN41-01889A, WIFI: WIDT20R BN59-01148B, BT: WIBT30A
Technical Specifications UE32ES6557
SAMSUNG UE32ES6557
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE32ES6557 TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
In some of these cases, a fault is detected in the BN44-00517C power module. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, check the serviceability of power switches (D4189, MDD1752) and rectifier diodes for possible breakdown (short circuit).
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 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) SSC2S110, PWM SOT23-6, 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, but there is sound, it reacts to the remote control. Or the image appears when you turn on and immediately disappears
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as a health indicator. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the BN41-01807A 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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - WT61P805, KLM2G1HE3F-B001, K4B2G1646C-HCK0, NTP7412S and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner BN40-00236A. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Once again, remind users! Attempts to self-repair a SAMSUNG UE32ES6557 TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
Service manual SAMSUNG UE32ES6557 Chassis U78A/U79A
The appearance of the MainBoard BN41-01807A is shown in the figure below:BN41-01807A
BN41-01807A can be used in TVs:
SAMSUNG UE40ES6550S (Panel LTJ400HV05-V), SAMSUNG UE46ES6547U UE46ES6547 (Panel LTJ460HW06-L), SAMSUNG UE40ES7207U (Panel LTJ400HL10-L), SAMSUNG UE46ES6540 UE46ES6540U (Panel LTJ460HW06-L), SAMSUNG UE40ES6750 MXRU (Panel LTJ400HV08-L), SAMSUNG UE32ES6727U UE32ES6727 (Panel LTJ320HW06-L), SAMSUNG UE40ES6757 UE40ES6757M (Panel LTJ400HV08-L), SAMSUNG UE32ES6550 UE32ES6550S (Panel LE320CSM-C1), SAMSUNG UE40ES6540S (Panel LTJ400HV07-L), SAMSUNG UE55ES6760 UE55ES6760SXZG (Panel LTJ550HW10-B), SAMSUNG UE32ES6540 UE32ES6540S (Panel LE320CSM-C1), SAMSUNG UE40ES6727 UE40ES6727U (Panel LTJ400HV08-L), SAMSUNG UE32ES6757M (Panel LE320CSM-C2).
The appearance of the power supply
Main features of the SAMSUNG UE32ES6557 device:
Installed matrix (LED-panel) LE320CSM-C1.
The matrix control uses the Timing Controller (T-CON) V400HK5-CPS1.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the SLC5012M PWM controller. As power elements of the LED driver, keys of the type D5N40, D3N40 are used.
The necessary supply voltages for all nodes of the SAMSUNG UE32ES6557 TV are generated by the BN44-00517C power module or its analogs using SSC2S110, PWM SOT23-6 microcircuits and power switches of the D4189, MDD1752 type.
MainBoard - the main board (motherboard) is a BN41-01807A module, using microchips WT61P805, KLM2G1HE3F-B001, K4B2G1646C-HCK0, NTP7412S and others.
The tuner BN40-00236A provides the reception of television programs and tuning to channels.