Technical description and composition of the SONY KDL-46W4000 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KDL-46W4000
Chassis / Version: EG-1L
Panel: LTY460HB02
Lamp backlight: CCFL: L = 1038mm, d = 4mm
T-CON: FS_HBC2LV2.4
Inverter (backlight): SSB460HA24 Rev0.3
Power Supply (PSU): IP5 1-876-476-11
PWM Power: R2A0112 (PFC), CXD9841P, MIP2H2 (Standby)
MainBoard: 1-875-656-11 - A-1363-835-A
IC MainBoard: VCT8398P, NEC D61300F1, E5116AJBG, HYB18NC256160BF, K9F5608U0D
Tuner: BTD-HF411T
Control: RM-ED016
Technical Specifications KDL-46W4000
SONY KDL-46W4000
General recommendations for repairing TV LCD
Like any other TV, SONY KDL-46W4000 should be started to be repaired with an external inspection for visible changes in the external and internal elements. Visible damage to elements can sometimes suggest further directions for finding a defect before starting the necessary measurements. Experienced repairmen are often aware of the causes of the defect and the possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
In the absence of any signs of operability, when the SONY KDL-46W4000 does not turn on and does not signal anything with the control lights on the panel, the IP5 power supply module is most likely faulty. When diagnosing and repairing an IP5 power supply, it is first necessary to check the fuse, and if it breaks, you should check the power switch and rectifier bridge diodes for avalanche (thermal) breakdown.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller that can only be checked by replacement, as well as others semiconductor elements (diodes, transistors, zener diodes).
When using the Active Power Factor Correction (CMC) circuitry in the power module, the search for faulty elements is somewhat more complicated.
If the SONY KDL-46W4000 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.
In most cases, diagnosing and repairing the inverter is difficult due to the organization of protection, which turns it off in emergency cases to avoid fires during short circuits or breaks in high-voltage circuits and during depressurization of lamps. Often, repairmen block the protection circuits in order to make the necessary measurements at the control points of the inverter to identify the causes of the defect.
Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
It should be remembered! Attempts to repair the SONY KDL-46W4000 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
Service manual / schematic diagram -------------> Sony KDL-32/40/46/52W4000, KDL-32/40/46/52W4220 chassis EG1L
PSU / schematic diagram -------------> Sony 1-876-467-11, 1-876-467-21 IP5 Power supply
The appearance of MainBoard 1-875-656-11 is shown in the figure below:1-875-656-11
The appearance of the power supply
Main features of the device SONY KDL-46W4000:
Installed matrix (LCD panel) LTY460HB02.
The matrix control uses the Timing Controller (T-CON) FS_HBC2LV2.4.
To power the backlight used inverter SSB460HA24.
The formation of the necessary supply voltages for all nodes of the SONY KDL-46W4000 TV is carried out by the IP5 power supply module, or its analogs using the R2A0112 (PFC), CXD9841P, MIP2H2 (Standby) microcircuits.
MainBoard - the main board (motherboard) is a module 1-875-656-11, using VCT8398P, NEC D61300F1, E5116AJBG, HYB18NC256160BF, K9F5608U0D and others.
The BTD-HF411T tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: S-LCD
Model: LTY460HB02
Type: a-Si TFT-LCD, Panel
Diagonal size: 46 inch
Resolution: 1920x1080, FHD
Active Area: 1018.08x572.67 mm