Technical description and composition of the TOSHIBA 42XV555D TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 42XV555D
Chassis / Version: XV550
Panel: LC420WUN
T-CON: 6870C-4200C, TL2412MC
Inverter (backlight): 6632L-0481A PPW-EE42VF-0 REV.1.6
Power Supply (PSU): SRV2170WW
MainBoard: PE0535 SJ-75011286
IC MainBoard: FLI32652H
Tuner: ENG37E05KF
Control: CT-90307
Appearance
TOSHIBA 42XV555D
General recommendations for repairing TV LCD
Repair of the TOSHIBA 42XV555D TV is better to start with a thorough external inspection and diagnosis of the malfunction. It is advisable to carefully examine the internal and external components. Often, by the external signs and nature of some damage, it is possible to draw preliminary conclusions and determine a further algorithm for troubleshooting. 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.
If the SRV2170WW power supply module malfunctions, the external manifestations may be different, for example, the TOSHIBA 42XV555D does not turn on at all and there is no indication of the indicator lights on the front panel. When diagnosing and repairing the SRV2170WW power supply, it is first necessary to check the fuse, and if it breaks, the power switch and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
It should be borne in mind that in the repair practice it is extremely rare that key transistors of the N-FET type fail for no reason that should be looked for by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, either dried electrolytic capacitors or dangling resistors of the primary circuit of the PSU, involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
When using a power factor correction unit (PFC) in the power modules, troubleshooting becomes somewhat more complicated and requires additional experience and knowledge of their operation.
If the TOSHIBA 42XV555D 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 repairing the inverter 6632L-0481A PPW-EE42VF-0 REV.1.6, it is often necessary to disable the protection for diagnostics, which, for the purpose of fire safety, turns it off in any emergency situation, for example, during a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
It should be remembered that in such cases there is a risk of failure of the power elements of the inverter and to take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
On the SJ-75011286 motherboard, in the event of a malfunction, you should first check the performance of all the power regulators of the microcircuits and, if necessary, update the software (software). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - FLI32652H with new or obviously good ones.
In cases where there is no tuning to the local television channels, you should make sure that there is a varicap supply voltage (30-33V) and other supply voltages at the terminals of the ENG37E05KF tuner.
For owners of the 42XV555D TV, we recommend that you contact qualified personnel with experience to repair! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32/37/42/46/52XV550P, 32/37/42XV555D/553D/556D, 46/52XV555D. PE0535, PE0534, PE0560, PE0597, PE0626, PE0668
The appearance of MainBoard PE0535 is shown in the figure below:PE0535
Key Features of the TOSHIBA 42XV555D:
Installed matrix (LCD panel) LC420WUN.
The matrix control uses the Timing Controller (T-CON) 6870C-4200C.
An inverter 6632L-0481A is used to power the backlight.
The formation of the necessary supply voltage for all nodes of the TOSHIBA 42XV555D TV is carried out by the SRV2170WW power module, or its analogues.
MainBoard - the main board (motherboard) is a PE0535 module, using FLI32652H microcircuits and others.
The ENG37E05KF tuner provides television reception and channel tuning.
Information from an alternative source:
TOSHIBA 42XV555D
Panel Type (Matrix): LC420WUN,
Motherboard: SJ-75011286, FLI32652H, Tuner: ENG37E05KF
T-con: Part No: 6870C-4200C, TL2412MC
Invertor: 6632L-0481A PPW-EE42VF-0 REV.1.6
PSU: SRV2170WW
Remote control: CT-90307
Additional technical information about the panel:
Brand: LG Display
Model: LC420WUN-SCA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 930.24x523.26 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1500: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + Dithering), CIE1931 72%
Response Time: 5 (G to G)
Frequency: 60Hz
Lamp Type: EEFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8/10-bit), 51 pins
Voltage: 12.0V