Technical description and composition of the SAMSUNG UE32D5520RW TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE32D5520RW UE32D5520
Chassis / Version: U66A
Panel: LD320BGC-C1
LED driver (backlight): integrated into PSU
PWM LED driver: SEM5025
Power Supply (PSU): BN44-00421A
PWM Power: FAN7602C
MOSFET Power: TF12N65
MainBoard: BN41-01660A
IC MainBoard: SEMS21 1108A-LF, NAND: K9GAG08U0E, DDR: D9LGQ, EEPROM: ATMLH108 2ECL
Tuner: BN40-00196A
Technical Specifications UE32D5520
SAMSUNG UE32D5520RW
General repair guidelines for TV LCD LED
A malfunction of the power supply is often manifested corny - the TV does not turn on, does not make any sounds, does not light up and does not blink with any indicators. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and TF12N65 transistors, which are often found in such a breakdown state in such situations.
The breakdown of the power switch of the pulse converter is often triggered by other elements, for example, in the stabilization or control circuits of this switch, as well as by the damper elements in its drain and TPI winding.
If the SAMSUNG UE32D5520RW does not have an image, but there is sound, the LD320BGC-C1 panel backlight LEDs or their power converter, the LED driver, may malfunction.
A malfunction in the backlight circuits often occurs due to a break in the power supply lines of the LED lines. It requires disassembling the panel and checking the LEDs themselves, the soldering of their terminals, as well as the reliability of the connections in the connectors and the soldering of the terminals.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as an indicator of serviceability. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
Repair of the BN41-01660A motherboard must begin with the diagnosis and verification of all linear stabilizers and power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
In some cases, it is necessary to check or replace (if necessary) the elements of the MB board (SSB) - SEMS21 1108A-LF, NAND: K9GAG08U0E, DDR: D9LGQ, EEPROM: ATMLH108 2ECL. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
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 BN40-00196A. 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.
It should be remembered! Attempts to repair the SAMSUNG UE32D5520RW TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
SCHEMATIC MANUAL --------> Samsung UE32D5520RW Chassis U66A.
Chassis : U66A Model : UE32D55**R*, UE37D55**R*, UE40D55**R*, UE46D55**R*, UE32D57**RS, UE37D57**RS, UE40D57**RS, UE46D57**RS
The appearance of the MainBoard BN41-01660A is shown in the figure below:BN41-01660A
BN41-01660A can be used in TVs:
SAMSUNG UE40D5520RW (Panel LD400BGC-C1 DD01), SAMSUNG UE32D5500 RW (Panel LD320BGC-C1), SAMSUNG UE32D5520RW UE32D5520 (Panel LD320BGC-C1).
The appearance of the power supply
Main features of the SAMSUNG UE32D5520RW device:
Installed matrix (LED-panel) LD320BGC-C1.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the SEM5025 PWM controller.
The necessary supply voltages for all nodes of the SAMSUNG UE32D5520RW television are generated by the BN44-00421A power module or its analogs using FAN7602C microcircuits and power switches of the TF12N65 type.
MainBoard - the main board (motherboard) is a BN41-01660A module, using chips SEMS21 1108A-LF, NAND: K9GAG08U0E, DDR: D9LGQ, EEPROM: ATMLH108 2ECL and others.
The tuner BN40-00196A provides the reception of television programs and tuning to channels.
