Technical description and composition of the SONY KDL-26EX553 TV, panel type and applicable modules. The composition of the modules.SONY LED
Model: KDL-26EX553
Chassis / Version: AZ3F
Panel: V260B3-LE2 Rev. C1
LED backlight: V260B3-LE2-TLDM1 Edge LED
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): PSC10368E M, 147437811
MainBoard: 1-884-958-51 (173290951) BAC S
IC MainBoard: CXD4733G, K4B2G1646C-HCH9, SIL9287BCNU
Tuner: DVB-T, DVB-T2, DVB-C
Control: WiFi: MDK 338V-0W - DWM-W046, IR: 1-733-030-11 - A-1863-404-A
Technical Specifications KDL-26EX553
SONY KDL-26EX553
General repair guidelines for TV LCD LED
In the case when the KDL-26EX553 does not turn on, does not respond to the remote control and the front panel buttons, does not blink bulbs and does not show any signs of operability, the power supply module PSC10368E M, 147437811 is probably faulty in this case. After checking the mains fuse and power elements of the primary circuit BP, you should also check the absence of a short circuit in the loads of the secondary rectifiers.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself for no reason that you should look for by checking other elements of the primary circuit - electrolytic capacitors, PWM controller IC_Power, which can be checked only by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If the SONY KDL-26EX553 does not have an image, but there is sound, there may be a malfunction of the backlight LEDs of the V260B3-LE2 Rev.C1 panel or their power converter - LED driver.
The lack of backlight often occurs due to an open circuit in the LED circuit. There is a need for disassembling the panel and checking the LEDs themselves, as well as the same contact connections in the connectors and rations of the terminals.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
Before changing the tuner DVB-T, DVB-T2, DVB-C, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Attention to users! Self-repair of a SONY KDL-26EX553 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual / schematic diagram -------------------> Service manual SONY AZ3F: KDL-22EX550, KDL-22EX553, KDL-22EX555, KDL-26EX550, KDL-26EX553, KDL-26EX555, KDL-32EX650, KDL-32EX653, KDL-32EX655
The appearance of MainBoard 1-884-958-51 is shown in the figure below:1-884-958-51
The appearance of the power supply
Main features of the device SONY KDL-26EX553:
Installed matrix (LED-panel) V260B3-LE2 Rev. C1.
To power the backlight LEDs, a converter is used, combined with the main board 1-884-958-51.
The formation of the necessary supply voltages for all nodes of the SONY KDL-26EX553 TV is carried out by the PSC10368E power module, or its analogs.
MainBoard - the main board (motherboard) is a 1-884-958-51 module, using CXD4733G, K4B2G1646C-HCH9, SIL9287BCNU and other chips.
The tuner DVB-T, DVB-T2, DVB-C provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V260B3-LE2
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: MVA, Normally Black, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 3.5%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 8.5 (G to G)
Frequency: 60Hz
Lamp Type: 6 strings WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
