Technical description and composition of the SONY KDL-32EX401 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KDL-32EX401
Chassis / Version: AZ1-K
Panel: LTY320HM03
T-CON: FHD_MB4_C2LV1.6
Inverter (backlight): SSI320_4UG01
PWM Inverter: SSI091ASN (24pin)
MOSFET Inverter: MDD1752
Power Supply (PSU): 3L314W PSC10308F M 147420812
PWM Power: STR-A6079M (Standby), SSC9513 (PWM Resonant)
MainBoard: 1-881-019-13 - A-1738-304-C - Y2009220B
IC MainBoard: PNX85433EH1, K4T5116306-HCE7, H27U1G8F2BTR, TDA19997HL / C1
Tuner: SUT-AE102T
Appearance
SONY KDL-32EX401
General recommendations for repairing TV LCD
TV SONY KDL-32EX401, like any other, it is advisable to start repairing it by examining the internal and external visible physical visual changes. Often, for certain external signs, the repairman can draw some conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
In the case when the KDL-32EX401 does not turn on, does not respond to the remote control and front panel buttons, does not blink light bulbs and does not show any signs of operability, most likely in this case the power supply module 147420812 is faulty. When diagnosing and repairing the power supply 147420812, first of all, check fuse, and if it is broken, the power switch and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
In most cases, a breakdown of the N-Fet converter key does not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If the SONY KDL-32EX401 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the display backlight nodes is likely. The lamps or the power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors.
Diagnostics of the SSI320_4UG01 inverter can be difficult due to the operation of the protection, which is organized by the designers to prevent negative consequences or fires in emergency cases, for example, during short circuits or breaks in the lamp power supply circuit, as well as their possible depressurization. To make the necessary measurements at control points or to take the necessary waveforms, repairmen have to block the protection circuits in order to be able to diagnose.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
In cases of attempts to repair the motherboard 1-881-019-13, it is necessary to check the operability of the power stabilizers of the microcircuits and, if possible, update 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 56-F855E-1.
Attention to users! Self-repair of a SONY KDL-32EX401 TV without the appropriate qualifications and experience can lead to its complete unrepairability!
Service manual / schematic diagram -------------------> Sony KDL-32EX401, 32EX402 CHASSIS AZ1-N(3a-2)
The appearance of MainBoard 1-881-019-13 is shown in the figure below:1-881-019-13
1-881-019-13 can be used in TVs:
SONY KDL-32EX401 (Panel LTY320HM03), SONY KDL-32EX600 (Panel V315H3-LE1), SONY KDL-37EX402 (Panel T370HW03 V.8 181107411).
The appearance of the power supply
Main features of the device SONY KDL-32EX401:
Installed matrix (LCD-panel) LTY320HM03.
The matrix control uses the Timing Controller (T-CON) FHD_MB4_C2LV1.6.
The SSI320_4UG01 inverter is used to power the backlight, controlled by the SSI091ASN PWM controller (24pin). As power elements of the inverter, keys of the MDD1752 type are used.
The necessary supply voltages for all nodes of the SONY KDL-32EX401 TV are generated by the 3L314W power module or its analogs using the STR-A6079M (Standby), SSC9513 (PWM Resonant) microcircuits.
MainBoard - the main board (motherboard) is a module 1-881-019-13, using chips PNX85433EH1, K4T5116306-HCE7, H27U1G8F2BTR, TDA19997HL / C1 and others.
The SUT-AE102T tuner provides television reception and channel tuning.
Information from an alternative source:
SONY KDL-32EX401 Chassis AZ1-K
Panel Type (Matrix): LTY320HM03,
Motherboard: 1-881-019-13,
T-con: FHD_MB4_C2LV1.6,
Invertor: SSI320_4UG01
PSU: 147420812, Key Controller: 56-F855E-1
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTY320HM03
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: PVA, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 7%), Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 12/8 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
