Technical description and composition of the SONY KDL-32U2000 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KDL-32U2000 K
Chassis / Version: SE-1 (WAX2)
Panel: LTA320W2-L14
T-CON: 320WSC4LV1.1
Inverter (backlight): KLS-S320BCI-M REV: 01
PWM Inverter: BD9886FV
MOSFET Inverter: AO4614
Trans Inverter: 320BCI
Power Supply (PSU): 1-870-685-12 G1 - 1-727-577-12 A-1189-415-A A1189415A
PWM Power: STR-A6169, TDA7495S, MCZ3001DB
MOSFET Power: 2SK3469
MainBoard: 1-870-688-11 - A-1189-406-A - I1198236D A1 BDT // BDTR
IC MainBoard: TDA9974AHS / 8/12, D6123F1-100, HY27US08281A, CXA1875AM
Tuner: 1-871-490-21 - 172783621 - A-1202-962-A - A1219976A
Control: IR: 1-871-493-21
Technical Specifications KDL-32U2000
SONY KDL-32U2000
General recommendations for repairing TV LCD
Like any other TV, SONY KDL-32U2000 K should be started to be repaired with an external inspection for visible changes in the external and internal elements. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize the defect. 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.
In the absence of any signs of operability, when the SONY KDL-32U2000 K does not turn on and does not signal anything with the control lights on the panel, the power supply module G1 is most likely faulty. If the mains fuse is cut off in the power supply, in most cases a breakdown of the 2SK3469 power switch is detected, which can be integrated with a 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.
As a rule, the keys of flyback converters, which use an N-Fet field effect transistor on a separate radiator, or integrated with the STR-A6169, TDA7495S, MCZ3001DB PWM controller in a single chip, are quite reliable and rarely fail for no reason. The reasons for the breakdown of the key should be sought by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is checked by replacing it with a known good one.
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 KDL-32U2000 K has no 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.
Often, attempts to repair the KLS-S320BCI-M REV: 01 inverter are hampered by the fact that the fault diagnosis is complicated by the operation of its protection, which is designed to turn off the inverter in emergency conditions - when the lamps are depressurized, breaks or short circuits in high voltage connections and other emergency situations. Lock protection to localize the defect is popular among repairmen.
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.
On the A1 BDT // BDTR motherboard, in case of a malfunction, you should first check the operation of all power supply stabilizers of the microcircuits and, if necessary, update the software (software). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its VCT6973G, 24C32 chips and other possible faulty components.
We recommend the owners of the KDL-32U2000 K TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
Service manual / schematic diagram -------------------> Sony KDL-26U2000, KDL-32U2000, KDL-40U2000 CHASSIS SE-1
The appearance of MainBoard 1-870-688-11 is shown in the figure below:1-870-688-11
1-870-688-11 can be used in TVs:
SONY KDL-20S2020 (Panel V201B1-L01), SONY KDL-26U2000 (Panel LTA260W2-L19), SONY KDL-32U2000 K (Panel LTA320W2-L14).
The appearance of the power supply
Main features of the device SONY KDL-32U2000:
Installed matrix (LCD panel) LTA320W2-L14.
The matrix control uses the Timing Controller (T-CON) 320WSC4LV1.1.
To power the backlight, an inverter KLS-S320BCI-M is used, it is controlled by the BD9886FV PWM controller. A 320BCI transformer is installed in the inverter converter. As power elements of the inverter, keys of the type AO4614 are used.
The necessary supply voltages for all nodes of the SONY KDL-32U2000 TV are generated by the power module 1-870-685-12, or its analogs using microcircuits STR-A6169, TDA7495S, MCZ3001DB and power switches of the type 2SK3469.
MainBoard - the main board (motherboard) is a module 1-870-688-11, using TDA9974AHS / 8/12, D6123F1-100, HY27US08281A, CXA1875AM and others.
Tuner 1-871-490-21 - 172783621 - A-1202-962-A - A1219976A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320W2-L14
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 44%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8/6 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V