Technical description and composition of the SAMSUNG LE46A556P1F TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE46A556P1F
Chassis / Version: GPR32SEN
Panel: T460HW02
Lamp backlight: 24 Lamp CCFL
T-CON: T460HW02 V0 CTRL BD 06A83-1A
Inverter (backlight): DARFON V235-107 4H.V2358.191 / D
Power Supply (PSU): BN44-00203A SIP468A
MainBoard: BN41-00974B BN94-01656N & BN41-00824C
IC MainBoard: MT8226, MT8291E, NTP-3100, WT61P8, HYB25DC256163CE-4, K4T56163QT
Tuner: BN40-00120A
Control: BN41-00994A L550
Technical Specifications LE46A556P1F
SAMSUNG LE46A556P1F
General repair guidelines for TV LCD
Possible malfunctions
- SAMSUNG LE46A556P1F TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
Failure in such cases should begin to be sought in the power supply circuits of BN44-00203A. It is necessary to measure its output supply voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
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), if they do not have visible damage to the chassis and open short circuit 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
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. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are in good working condition, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, inverter protection must be disabled. 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 turn on, the indicator signals standby or working mode, 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). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its chips MT8226, MT8291E, NTP-3100, WT61P8, HYB25DC256163CE-4, K4T56163QT and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before replacing the BN40-00120A tuner, if there is no tuning to the channels, 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
Once again, remind users! Attempts to self-repair a TV SAMSUNG LE46A556P1F without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
SCHEAMTIC ----------> Samsung LE32A55*P, LE37A55*P, LE40A55*P, LE46A55*P, LE52A55*P Chassis GPR32SEN, GPR37SEN, GPR40SEN, GPR46SEN, GPR52SEN.
PSU SCHEMATIC-----> BN44-00208A.
The appearance of the MainBoard BN41-00974B is shown in the figure below:
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 device SAMSUNG LE46A556P1F:
Installed matrix (LCD-panel) T460HW02.
The matrix control uses the Timing Controller (T-CON) T460HW02.
To power the backlight used inverter DARFON.
The formation of the necessary supply voltages for all nodes of the SAMSUNG LE46A556P1F TV is carried out by the power module BN44-00203A, or its analogues.
MainBoard - the main board (motherboard) is a BN41-00974B module, using chips MT8226, MT8291E, NTP-3100, WT61P8, HYB25DC256163CE-4, K4T56163QT and others.
The tuner BN40-00120A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T460HW02 V401
Type: a-Si TFT-LCD, Panel
Diagonal size: 46 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 1018.08x572.67 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 550 cd / m²
Contrast Ratio: 2500: 1
Display Colors: 1.07B (10-bit), CIE1931 92%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 24 pcs CCFL Embedded (Balance board)
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V