Technical description and composition of the SONY KLV-46V550A TV, panel type and applicable modules. The composition of the modules.SONY
Model: KLV-46V550A
Chassis / Version: EX2L
Panel: T460HW03 V.2
T-CON: T370HW02 CTRL BD 37T04-C0G
Inverter (backlight): V235-10C 4H.V2358.451 / A DARFON
Power Supply (PSU): 1-878-599-11 IP2
PWM Power: CXD9969P, MIP2H2, LX1692, BA2901SF
MOSFET Power: 2SK3934 (PFC), TK8A50D
MainBoard: 1-878-942-22 BA board A-1728-482-A
IC MainBoard: MC10147F1 410, MB91F313A, NAND Flash: K9F1208UOC, EEPROM: 24c32
Tuner: BTF-BG442T 8-597-708-00
Control: RM-GA015 148730621
Technical Specifications KLV-46V550A
SONY KLV-46V550A
General recommendations for repairing TV LCD
Repair of a SONY KLV-46V550A TV is advisable to start with an external examination of all its constituent elements, both internal electronic components and external. Inspection is also subject to body elements, control buttons, screen, connectors and cords. In some cases, visible external damage to the elements can suggest directions for troubleshooting and localizing the defect before starting the necessary measurements at the control points of the nodes of electronic circuits. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a hint in the assumptions about the causes and consequences of the malfunction.
Sometimes the SONY KLV-46V550A TV just does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the IP2 1878-599-11 general power supply module. If the mains fuse is broken in the power supply, in most cases a breakdown of the power switch is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
The reasons for the breakdown of the power switch of the flyback converter of the power module can be different, for example, a malfunction of semiconductor elements or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip or breakage of the resistors in its bundle.
In cases using a power module with an active KKM, troubleshooting is sometimes somewhat more complicated.
If the SONY KLV-46V550A TV does not have an image, but there is sound, the malfunction should be sought in the power converter of the backlight (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overstated ESR.
Repair of the DARF V235-10C inverter can often be somewhat complicated by the use of special protection circuits, which are designed to disconnect it in emergency cases for fire safety when the lamps are depressurized, or short circuits or breaks in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits in order to be able to make the necessary measurements at the control points of the circuit.
In such cases, special care should be taken during diagnostics, 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.
If the BA motherboard is faulty, first of all it is necessary to check all the linear power regulators of its chips and, if necessary, update the software. Sometimes you can check the health of MB only by replacement.
Before changing the BTF-BG442T tuner, if it is not possible to tune to television channels, make sure that there are supply voltages, including varicap power (30-33V), which must be measured on the corresponding tuner pins.
Attention to users! Self-repair of a SONY KLV-46V550A TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service / Schematic manual -----------------> Sony KLV-32V530A, 32V550A/R/W, 40V530A 40V550A/R/W, 46V550A, 52V550A, CHASSIS EX2L KLV-32V530A, KLV-32V550A, KLV-32V550A/R, KLV-32V550A/W, KLV-40V530A, KLV-40V550A, KLV-40V550A/R, KLV-40V550A/W, KLV-46V550A, KLV-52V550A
Service / Schematic manual -----------------> Sony 1-878-599-11 IP2 Power supply
The appearance of MainBoard 1-878-942-22 is shown in the figure below:1-878-942-22
1-878-942-22 can be used in televisions:
SONY KDL-32W5500 (Panel T315XW02 V.1), SONY KDL-37V5500 (Panel T370HW02 V.B.), SONY KDL-40V5610 (Panel LTY400HA12), SONY KDL-40W5500 (Panel LTY400HF05), SONY KDL-40WE5 (Panel LTY400HF02 102), SONY KDL-46W5500 (Panel LTY460HF05), SONY KLV-46V550A (Panel T460HW03 V.2), SONY KDL-46W5740 (Panel LTY460HF05).
The appearance of the power supply
Main features of the device SONY KLV-46V550A:
Installed matrix (LCD-panel) T460HW03 V.2.
The matrix control uses the Timing Controller (T-CON) T370HW02.
To power the backlight used inverter V235-10C.
The necessary supply voltages for all nodes of the SONY KLV-46V550A TV are generated by the power module 1-878-599-11, or its analogs using microcircuits CXD9969P, MIP2H2, LX1692, BA2901SF and power switches of the type 2SK3934 (PFC), TK8A50D.
MainBoard - the main board (motherboard) is a module 1-878-942-22, using microchips MC10147F1 410, MB91F313A, NAND Flash: K9F1208UOC, EEPROM: 24c32 and others.
The BTF-BG442T 8-597-708-00 tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T460HW03 V2
Type: a-Si TFT-LCD, Panel
Diagonal size: 46 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 1018.08x572.67 mm
Surface: Antiglare (Haze 13%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 18 pcs CCFL Embedded (Balance board)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V