Sony Bravia 32R402 Main board Faults Details
SONY Bravia Service Mode
SAMSUNG LED
Model: UE32M5000 UE32M5000AK
Chassis / Version: XA01
Panel: CY-JM032BGER2V
LED backlight: V7DN-320SM1-R1 (17,03,16)
T-CON: HV320FHB-N10 HV480FH2-600 47-6021043
LED driver (backlight): integrated into MainBoard
PWM LED driver: BD9413F
Power Supply (PSU): Adapter 19V 3,17A BN44-00838A A5919_FSM
MainBoard: BN41-02582B BN94-12042A
IC MainBoard: CPU: SENK20-MS, NAND ESTM NT17L 2M
Tuner: BN37-00013A
Control: Remote: AA59-00741A, IR: BN41-02477A A38694E
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The SAMSUNG UE32M5000 does not turn on, does not respond to the control panel and the control panel buttons, the indicators do not light or blink. Imran Ashraf Support
With such manifestations, in some cases, the power module Adapter is faulty.
The external power adapter Adapter 19V 3,17A BN44-00838A A5919_FSM is not always repairable, the more the owner can purchase it by himself. But, in some cases, there is a sense to open it and eliminate the simple typical defects inherent in converters in impulse sources. It is necessary to measure its secondary output voltages, and in case of their absence, check the power switches and rectifier diodes in the converters for a short circuit.
At any breakdowns of semiconductors in secondary circuits, the converter can normally operate in emergency short circuit mode. The output voltages are absent. And at short circuit in power elements of a primary circuit, as a rule, the mains fuse and, more rarely the current sensor in a source of a key is broken.
The breakdown of Mos-Fet keys used in impulse sources is often caused by faults of other elements, for example, in the PWM power supply circuit, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM (PWM) chips are usually checked for replacement with new ones, or known to work.
- There is no picture, there is sound, the remote reacts, the channels are switched. In some cases, the image appears when turned on and immediately disappears.
The most likely in these cases is the failure of the LED backlighting. The reason for this may be a circuit break in the LED, or a problem in stabilizing their power.
Identify the break in the line of LEDs without disassembling the panel with a simple multimeter is not possible. The LEDs are connected in series and require a voltage of several tens of volts to open their transitions. Ideally, for such purposes, the current source is suitable. You can open the panel and check each LED separately. Usually Chinese multimeters lightly light one 3-volt LED, if you connect the probes in the forward direction (the red probe to the anode, the black probe to the cathode). In the case of dual 6-volt LEDs, a PN transition of its emergency zener diode can serve as an indicator of the serviceability of the LED. In the event of a failure of the LED, its zener diode will either be broken or broken in the R / 3.
- The TV does not turn on, the indicator indicates a standby or operating mode, or blinks.
Repair or diagnostics of the BN41-02582B motherboard should begin with a check of the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, you should update or replace the software (software). When repairing the MB card, it is necessary to check its CPU components: SENK20-MS. Defective items should be replaced. If chips with BGA soldering technology are used, the problem in its implementation is detected by the method of local chip heating.
If the BN37-00013A tuner is suspected of a malfunction, first of all it is necessary to check the correctness of the software, as well as the availability of the required voltage levels and the impulses of data exchange with the processor via the I2C bus at the corresponding tuner terminals.
Users and TV owners need to remember that attempts to repair the SAMSUNG UE32M5000 without proper qualification and the necessary experience can lead to serious negative consequences!
SAMSUNG LED
Model: UE40C5000QW UE40C5000
Chassis / Version: Ver: FB02
Panel: T400FAE2-HE
LED backlight: LMB-4000BM11
T-CON: CPWBX RUNTK DUNTK 4414TP ZZ
LED driver (backlight): integrated into PSU; 290 mA
PWM LED driver: HV9963, KIA358F
MOSFET LED driver: FDPF5N50
Power Supply (PSU): BN44-00353A - PD46AF0E_ZSM - PSLF121B01A-B
PWM Power: UCC25600 , SEM3040 (PFC), ICE3BR1765J (Standby)
MOSFET Power: TK8A50, SD10N60 (PFC)
MainBoard: BN41-01378A BNP201064FD
IC MainBoard: MX25L4005A STA369BWS AT24C256C
TUNER: BN40-00172A DTOS40CVH081A
Control: IR: BN96-13047D BN41-01390A
The SAMSUNG UE40C5000QW does not turn on, it does not respond to the control panel and the control panel buttons, the indicators do not light or blink.
The fault in such cases should be searched for in the power supply circuits BN44-00353A. If there are no necessary supply voltages in the secondary circuits of the converters, it is necessary first of all to check the power switches (TK8A50, SD10N60 (PFC)) and rectifying diodes for possible partial or complete breakdown.
In the case of diode breakdowns in secondary circuits, the converter can operate in an emergency short circuit mode without output voltages, and in the case of short circuit in the power elements of the primary circuit, the mains fuse and / or the current sensor in the source of the key are usually cut off.
The breakdown of Mos-Fet keys used in impulse sources is often caused by malfunctions of other elements, for example, elements of PWM regulator feeders, frequency-setting, damping, as well as elements of Negative Stabilization Feedback. PWM chips (PWM) UCC25600, SEM3040 (PFC), ICE3BR1765J (Standby) are usually tested by replacement with new ones or known to be working.
- There is no picture, the sound is, it reacts to the remote control. Or immediately after turning on for a second the image may appear and immediately disappear.
Often in such cases, there is no LED backlighting. The reason for this may be a circuit break in the LED, or a problem in stabilizing their power.
Identify the break in the line of LEDs without disassembling the panel with a simple multimeter is not possible. The LEDs are connected in series and require a voltage of several tens of volts to open their transitions. Ideally, for such purposes, the current source is suitable. You can open the panel and check each LED separately. Usually Chinese multimeters lightly light one 3-volt LED, if you connect the probes in the forward direction (the red probe to the anode, the black probe to the cathode). In the case of dual 6-volt LEDs, a PN transition of its emergency zener diode can serve as an indicator of the serviceability of the LED. In the event of a failure of the LED, its zener diode will either be broken or broken in the R / 3.
- The TV does not turn on, the indicator indicates a standby or operating mode, or blinks.
Repair or diagnostics of the BN41-01378A motherboard should begin with a check of the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, you should update or replace the software (software). Complex repair of the MB (SSB) board in some cases is possible and practiced by repairmen. To do this, check and, if necessary, replace the elements of the MX25L4005A STA369BWS AT24C256C. Failure of BGA chips is usually easy to detect by warm-up.
If the TV normally operates from external devices, but does not tune to TV channels, the tuner BN40-00172A DTOS40CVH081A may malfunction. In such cases, first of all, it is necessary to verify the presence of supply voltages at its corresponding terminals. It is also necessary to verify the possibility of data exchange between the tuner and the processor via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Once again, we remind TV users: do not attempt self-repair without the relevant knowledge, experience and necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
Imran Ashraf Support
