Technical description and composition of the SAMSUNG LW15M23CX TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LW15M23CX
Chassis / Version: VE15EO
Panel: LTM150XH-L06
Lamp backlight: 4 Lamp CCFL
Inverter (backlight): integrated into PSU BN41-00347A
PWM Inverter: OZ960SN
MOSFET Inverter: FDS4935
Trans Inverter: TMP90199CT
Power Supply (PSU): BN44-00112A
PWM Power: NCP1200P60
MOSFET Power: P6NK60ZFP
MainBoard: BN41-00449C MP1.2 (2004.03.24)
IC MainBoard: VCT4862, gm2221, TDA7266D, BA7657F, 24C16, TDA7050, MP1410ES, DS1337
Tuner: BN40-00049A TMQZ6-416A
Control: BN59-00437A
Appearance
SAMSUNG LW15M23CX
General repair guidelines for TV LCD
Possible manifestations of defects
- SAMSUNG LW15M23CX 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 such cases, the BN44-00112A power supply is usually faulty. It is then necessary to measure its output voltages and, if they are absent, you should check the power switches (P6NK60ZEP) and the rectifier diodes of the converters for a short circuit probability.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often 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 (PWMs) of the NCP1200P60, 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, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
These manifestations can be triggered by a power supply module, or by inverter defects, as well as a 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 BN41-00449C 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 some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - VCT4862, gm2221, TDA7266D, BA7657F, 24C16, TDA7050, MP1410ES, DS1337 with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
Malfunction of the tuner BN40-00049A TMQZ6-416A is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
TV users and owners must remember that attempts to self-repair a SAMSUNG LW15M23CX TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
Service manual and schematic diagram -----------> SAMSUNG LW15M23C Chassis VE15EO.
POWER SUPPLY SCHEMATIC Samsung --------> BN44-00112A Power supply.
BN41-00449C
BN41-00449C can be used in TVs:
SAMSUNG LE15E31S (Panel 15 inches 1024x768), SAMSUNG LW15M23CX (Panel LTM150XH-L06).
The appearance of the power supply
Main features of the SAMSUNG LW15M23CX device:
Installed matrix (LCD panel) LTM150XH-L06.
To power the backlight, a converter is used, combined with the power supply, controlled by the OZ960SN PWM controller. A transformer TMP90199CT is installed in the inverter converter. As power elements of the inverter, keys of the FDS4935 type are used.
The necessary supply voltages for all nodes of the SAMSUNG LW15M23CX TV are generated by the BN44-00112A power module or its analogs using NCP1200P60 microcircuits and P6NK60ZFP power switches.
MainBoard - the main board (motherboard) is a BN41-00449C module, using VCT4862, gm2221, TDA7266D, BA7657F, 24C16, TDA7050, MP1410ES, DS1337 and other chips.
The tuner BN40-00049A TMQZ6-416A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTM150XH-L06
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.0 inch
Resolution: 1024x768, XGA
Display Mode: TN, Normally White, Transmissive
Active Area: 304.1x228.1 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 400: 1
Display Colors: 16.2M (6-bit + FRC)
Response Time: 5/20 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 20 pins
Voltage: 3.3V