Technical description and composition of the TV SONY KDL-32EX653, type of panel and applicable modules. The composition of the modules.SONY LED
Model: KDL-32EX653
Chassis / Version: AZ3F
Panel: LTY320HN03
LED backlight: LJ64-03412A SLED 2012SLS32 7030
T-CON: WSL_C4LV0.0
LED driver (backlight): integrated into PSU
Power Supply (PSU): APS-323 1-886-263-12
PWM Power: MIP2H2 (7pin)
MainBoard: 1-885-388-22 - BAPS board - 173308922 - I1875719B
IC MainBoard: CXD4737GB, EDJ2116DEBG
Control: RM-ED050, WiFi: MDK 338V-0W DWM-W046 1-458-355-21
Technical Specifications KDL-32EX653
SONY KDL-32EX653
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The SONY KDL-32EX653 TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
With such manifestations, a malfunction is most likely to be detected in the APS-323 power supply module. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of all power switches and rectifier diodes for a possible breakdown. The standby converter on the MIP2H2 PWM controller must be checked first.
It should be remembered that in the event of breakdowns in the secondary circuits of the converters, they usually can fail in short circuit mode, and during short circuits in the power elements of the primary circuit, the main fuse or current sensor at the source of the key most 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 the excess of maximum current or voltage values. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization.
PWM (PWM) MIP2H2 (7pin), if there is no visible damage and short circuit between the terminals, it is checked by replacing with a known-good one.
- 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.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 1-885-388-22 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, 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 CXD4737GB, EDJ2116DEBG. BGA chip malfunctions are usually easy to detect by warming up.
Attention! For users and owners of KDL-32EX653 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
The appearance of MainBoard 1-885-388-22 is shown in the figure below:1-885-388-22
The appearance of the power supply
Main features of the device SONY KDL-32EX653:
Installed matrix (LED-panel) LTY320HN03.
The matrix control uses the Timing Controller (T-CON) WSL_C4LV0.0.
To power the backlight LEDs, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the SONY KDL-32EX653 TV is carried out by the APS-323 power module, or its analogs using MIP2H2 (7pin) microcircuits.
MainBoard - the main board (motherboard) is a 1-885-388-22 module, using CXD4737GB, EDJ2116DEBG and others.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTY320HN03
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 0.8%), Hard coating (2H)
Brightness: 450 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 1.07B (8-bit + Hi-FRC), CIE1931 70%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 2 strings WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
