Technical description and composition of the TV SONY KLV-32S550A, type of panel and applicable modules. The composition of the modules.SONY
Model: KLV-32S550A KLV-32T550A
Chassis / Version: EX2T
Panel: V315B3-L01 // LTY320AP01 / 02/06/03
T-CON: V315B3-C01 // 320AB03C2LV0.3 LMX6332T1A-E 24C64WP KHDBWB66 TPS65160A A632AE2 ISL24007IRZ 17822 A1718
Inverter (backlight): CEM-1-97 or SSI320_8C01
PWM Inverter: OZ964GN (20) BA2902F, OZ9972BN
MOSFET Inverter: ao A4614 (SO8) MDD1752 (3)
Trans Inverter: U320S5 099R 1 -2, UKC1 U99H
Power Supply (PSU): APS-253 (ID) A1704563A GT3
PWM Power: CXA3809M, MIP2H2 (Standby)
MOSFET Power: K4096 K4085
MainBoard: 1-878-659-22 A1707715C
IC MainBoard: CXB1444R, TMDS341A, TDA7491HV, TDA7491HV, LMX633T1A-B, 25MA080R
Control: RM-GA016, RM-GA015
Technical Specifications KLV-32S550A
SONY KLV-32S550A
General recommendations for repairing TV LCD
Repair SONY KLV-32S550A KLV-32T550A must begin with the diagnosis of a malfunction and a thorough inspection of its external and internal components, including those of the body. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize the defect. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks formed in the soldered leads of heating elements, or a layer of coal on burnt resistors sometimes tell the repairman the causes of the malfunction and possible consequences.
If the GT3 APS-253 (ID) A1704563A GT3 power supply module fails, the external manifestations may be different, for example, the SONY KLV-32S550A KLV-32T550A does not turn on at all and there is no indication of the indicator lights on the front panel. It is advisable to start the troubleshooting of the power supply module by checking the mains fuse. If it is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and the power switch of the K4096 K4085 converter, which are often found in a breakdown state in such situations.
The reasons for the breakdown of the power switch of the flyback converter of the power supply 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 MIP2H2 (8) CXD9841P (18) PWM controller chip or broken resistors in its bundle .
If an active Power Factor Corrector (PFC) is used in the power module circuitry, it is sometimes more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
If the SONY KLV-32S550A KLV-32T550A does not have an image, but there is sound and the TV is controlled from 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.
When repairing the CEM-1-97 or SSI320_8C01 inverter, it is often necessary to disable protection for diagnostics, which, for fire safety reasons, turns it off in any emergency situation, for example, in the event of a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
It should be remembered that when the protection is turned off, there is always a risk of failure of the power elements of the inverter during diagnosis. After repair, it is necessary to restore all standard converter protection circuits.
Diagnostics and repair of the motherboard BT2 A1707715C is carried out by checking the performance of power stabilizers or updating the software (software). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - CXB1444R (Sony production = TMDS341A (3-TO-1 DVI / HDMI SWITCH TDA7491HV TDA7491HV LMX633T1A-B 25MA080R with new or obviously working ones).
Attention to the owners! Attempts to repair the TV yourself SONY KLV-32S550A KLV-32T550A are not recommended by the manufacturer and can lead to serious negative consequences!
Service / Schematic manual -----------------> Sony KLV-26S550A KLV-32S530A KLV-32S550A KLV-37S550A/L/T CHASSIS EX2T
Service / Schematic manual -----------------> APS-252, APS-253, APS-254 Power supply
The appearance of MainBoard 1-878-659-22 is shown in the figure below:1-878-659-22
PSU Advanced
The APS-253 power supply module is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced by the device into the mains. The PFC node is a Step-Up Converter based on the FA5501A PWM controller, which evenly distributes high-frequency pulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the device SONY KLV-32S550A:
Installed matrix (LCD panel) V315B3-L01 or LTY320AP01 / 02/06/03.
The matrix control uses the Timing Controller (T-CON) V315B3-C01.
To power the backlight, an inverter CEM-1-97 is used, it is controlled by the PWM controller OZ964GN (20) BA2902F, OZ9972BN. The transformer U320S5 099R 1 -2, UKC1 U99H is installed in the inverter converter. As the power elements of the inverter, keys of the type ao A4614 (SO8) MDD1752 (3) are used.
The necessary supply voltages for all nodes of the SONY KLV-32S550A TV are generated by the APS-253 power module or its analogs using CXA3809M, MIP2H2 (Standby) microcircuits and K4096 K4085 power switches.
MainBoard - the main board (motherboard) is a module 1-878-659-22, using microcircuits CXB1444R, TMDS341A, TDA7491HV, TDA7491HV, LMX633T1A-B, 25MA080R and others.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V315B3-L01 ECO
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: MVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 17%)
Brightness: 500 cd / m²
Contrast Ratio: 2500: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5ms
Frequency: 60Hz
Lamp Type: 6 pcs CCFL Embedded (Inverter)
Voltage: 12.0V