Technical description and composition of the SAMSUNG LE32S67BD TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE32S67BD
Panel: CLAA320WF01
Lamp backlight: 7 Lamp CCFL
T-CON: CPT320WF01C
Inverter (backlight): VIT68001.95 REV: 0 CPT320WF01SC
Power Supply (PSU): BN44-00192A MK32P3
PWM Power: STR-A6159 (Standby), MC33067P, MC33167T
MOSFET Power: 5N50C, 11N60
MainBoard: BN41-00879B BN94-01354Q
IC MainBoard: MT8293AE, TEA6422
Tuner: BN40-00096A
Control: IR: BN41-00712A
Appearance
SAMSUNG LE32S67BD
General repair guidelines for TV LCD
Possible malfunctions
- SAMSUNG LE32S67BD 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.
In some of these cases, the main switching power supply, the BN44-00192A module, turns out to be faulty. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches (5N50C, 11N60) and rectifier diodes in the converters for possible breakdown.
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.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) STR-A6159 (Standby), MC33067P, MC33167T, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
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 working, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. 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 BN41-00879B 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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements MT8293AE, TEA6422. BGA chip malfunctions are usually easy to detect by warming up.
If there is no reception of television channels, but the TV works properly from external devices, first of all you need to check the voltage of the tuner BN40-00096A and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
We recommend LE32S67BD TV owners for repair only to qualified specialists with the necessary work experience! Attempts to repair it yourself without the appropriate knowledge and skills can lead to irreversible negative consequences!
The appearance of the MainBoard BN41-00879B is shown in the figure below:BN41-00879B
The appearance of the power supply
Main features of the SAMSUNG LE32S67BD device:
Installed matrix (LCD-panel) CLAA320WF01.
The matrix control uses the Timing Controller (T-CON) CPT320WF01C.
To power the backlight used inverter VIT68001.95.
The necessary supply voltages for all nodes of the SAMSUNG LE32S67BD TV are generated by the BN44-00192A power supply module or its analogs using the STR-A6159 (Standby), MC33067P, MC33167T microcircuits and 5N50C, 11N60 power switches.
MainBoard - the main board (motherboard) is a module BN41-00879B, using chips MT8293AE, TEA6422 and others.
The tuner BN40-00096A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CPT
Model: CLAA320WF01U
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: MVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1500: 1
Display Colors: 16.7M (8-bit), CIE1931 75%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: 7 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V