Technical description and composition of the SONY KDL-37V4500 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KDL-37V4500
Chassis / Version: EG1L
Panel: T370XW02 V.C
T-CON: 37T03-C00
Inverter (backlight): VIT71060.50 - LOGAH REV: 1
PWM Inverter: 0Z964GN
MOSFET Inverter: P4404EDG
Trans Inverter: T51 0197.210
Power Supply (PSU): DPS-250AP-34
PWM Power: DLA001DTR, L6562DTR (PFC), MIP2H2 (Standby), DAS01A
MOSFET Power: SPW20N60C3, 2SK3569 (Q)
MainBoard: 1-875-656-22 JAE2402
IC MainBoard: MB90F334, K9F5608U0D, CXB1444R, TPA3100D2
Tuner: BTF-HF412T
Technical Specifications KDL-37V4500
SONY KDL-37V4500
General recommendations for repairing TV LCD
Repair of the SONY KDL-37V4500 TV should begin with the diagnosis of a malfunction, which involves a careful examination of the external and internal elements of the device. In some cases, visible external damage to the elements can suggest the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of the nodes of electronic circuits. If ring cracks are detected in the soldering of the terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of an already known typical malfunction.
In the absence of any signs of operability, when the SONY KDL-37V4500 does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the TV's DPS-250AP-34 power module. After checking the mains fuse and power elements of the primary power supply circuit, it should also check the absence of a short circuit in the loads of the secondary rectifiers.
The reasons for the breakdown of the power switch in switching power supplies (IIPS) can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip DLA001DTR, L6562DTR (PFC), MIP2H2 (Standby) , DAS01A or breakage of resistors in its harness.
If the SONY KDL-37V4500 does not have an image, but there is sound, there is a possibility of a malfunction of the backlight or power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working. When disabling protection in order to enable the diagnosis of a malfunction, special care should be taken, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
Diagnosis and repair of the motherboard 1-875-656-22 usually begins with a test of the performance of the stabilizers and power converters of the module chips. In some cases, a software update is required. Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements MB90F334, K9F5608U0D, CXB1444R, TPA3100D2. BGA chip malfunctions are usually easy to detect by warming up.
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the voltage of the BTF-HF412T tuner and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Attention to users! Self-repair of a SONY KDL-37V4500 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual / schematic diagram -------------> Sony EG1L KDL-26V4500, KDL-32V4500, KDL-37V4500
The appearance of MainBoard 1-875-656-22 is shown in the figure below:
1-875-656-22
1-875-656-22 can be used in TVs:
SONY KDL-26V4000 (Panel LTA260AP01 Y01), SONY KDL-37V4500 (Panel T370XW02 V.C), SONY KDL-32V4500 (Panel LTZ320AA01).
PSU Advanced
The KDL-37V4500 model uses a DPS-250AP-34 power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, this is a boost converter based on the L6562DTR PWM controller, which eliminates the charge current of the rectifier filter's electrolytic capacitor from the network directly through the open diodes when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the device SONY KDL-37V4500:
Installed matrix (LCD panel) T370XW02 V.C.
The matrix control uses the Timing Controller (T-CON) 37T03-C00.
To power the backlight, an inverter VIT71060.50 is used, it is controlled by a PWM controller 0Z964GN. The transformer T51 0197.210 is installed in the inverter converter. As power elements of the inverter, keys of the P4404EDG type are used.
The necessary supply voltages for all nodes of the SONY KDL-37V4500 TV are generated by the DPS-250AP-34 power supply module or its analogs using chips DLA001DTR, L6562DTR (PFC), MIP2H2 (Standby), DAS01A and power switches of the type SPW20N60C3, 2SK3569 (Q) .
MainBoard - the main board (motherboard) is a module 1-875-656-22, using microchips MB90F334, K9F5608U0D, CXB1444R, TPA3100D2 and others.
The BTF-HF412T tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T370XW02 VC02
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 819.6x460.8 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
