Technical description and composition of the TOSHIBA 37XV501PR TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 37XV501PR
Panel: LC370WUN (SA) (B1)
T-CON: 6870C-0214A (LC370WUN-SAA1)
Inverter (backlight): PPW-EE37FV-0 (N) Rev1.0
Power Supply (PSU): PE0531
PWM Power: A6169 (8), STR-Z2589, 2A20112 (PFC)
Mainboard: PE0532
IC MainBoard: FLI32652H, HY5PS121621C, CXB1444R, STA333W, 0747EFI T5CB5-6UK1 F1789ZAE
Tuner: ENG37E11GF
Specifications 37XV501PR
TOSHIBA 37XV501PR
General recommendations for repairing TV LCD
Possible manifestations of defects
- The TOSHIBA 37XV501PR does not turn on and does not show any signs of turning on. The control buttons and the remote control does not respond.
Failure in such cases should be sought in the power supply circuits PE0531. First of all, it is necessary to check the operation of the standby converter implemented on the A6169 PWM controller. Next, it is necessary to measure the output voltages of other converters (PFC and the main source) in the operating mode and, if they are absent, you should check the power switches and rectifier diodes for a short circuit probability.
During thermal and avalanche breakdowns of semiconductors in secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization.
PWM chips A6169 (8), STR-Z2589, 2A20112 (PFC is checked by replacing with obviously good ones.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
These manifestations can be triggered by a power module, or by defects in the inverter, as well as a distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the PE0532 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - FLI32652H, HY5PS121621C, CXB1444R, STA333W, 0747EFI T5CB5-6UK1 F1789ZAE which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the voltage of the tuner ENG37E11GF and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
It should be remembered! Attempts to independently repair the TOSHIBA 37XV501PR 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!
Repair MainBoard
The appearance of MainBoard PE0532 is shown in the figure below:
PE0532
PE0532 can be used in TVs:
TOSHIBA 32CV500PR (Panel LTA320AA03), TOSHIBA 37CV500PR (Panel LC370WXN-SAC1 75011157), TOSHIBA 42CV500PR (Panel LC420WXN-SAB1 75011173), TOSHIBA 42XV550PR (Panel LC420WUN (SA)(A1)), TOSHIBA 32XV550PR (Panel LTA320HA02), TOSHIBA 32XV500PR (Panel LTA320HA02), TOSHIBA 37XV501PR (Panel LC370WUN (SA)(B1)).
The appearance of the power supply
Key Features of the TOSHIBA 37XV501PR:
Installed matrix (LCD panel) LC370WUN (SA) (B1).
The matrix control uses the Timing Controller (T-CON) 6870C-0214A.
To power the backlight used inverter PPW-EE37FV-0.
The necessary supply voltages for all nodes of the TOSHIBA 37XV501PR TV are generated by the PE0531 power module or its analogs using A6169 (8), STR-Z2589, 2A20112 (PFC) microcircuits.
MainBoard - the main board (motherboard) is a PE0532 module, using chips FLI32652H, HY5PS121621C, CXB1444R, STA333W, 0747EFI T5CB5-6UK1 F1789ZAE and others.
The ENG37E11GF tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC370WUN-SAB1
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 819.36x460.89 mm
Surface: Antiglare (Haze 13%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1300: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + Dithering)
Response Time: 5 (G to G)
Frequency: 60Hz
Lamp Type: EEFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V
Trademark: TOSHIBA, Model: 37XV501PR.
Short from TV: LCD, 37 ", 1920x1080, 1080p Full HD, sound: 50W, HDMI: 3.
The composition uses MainBoard PE0532 and LCD panel (matrix) LC370WUN (SA) (B1).
Power Supply Unit (PSU) PE0531 Power Supply.
TOSHIBA 37XV501PR LCD TV with LC370WUN LCD, diagonal size 37 "(94 cm) in 16: 9 format. 500 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. Dynamic contrast ratio of 15000: 1 is achieved by special operation control The design and technical capabilities of the TV include viewing programs and movies in high quality HD with a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Digital signal processing and generation takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
The power of the sound system 50 W (2x25 W) provides two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, SCART x2, RGB, VGA, HDMI x3. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768.
The power consumed by the TV in the operating mode from the network is 183 watts.
Overall dimensions: with stand 902x632x247 mm, without stand 902x590x92 mm.
TV Weight: with stand: 19.1 kg, without stand: 16.1 kg.
Attention! The TOSHIBA 37XV501PR LCD TV panel LC370WUN (SA) (B1) is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!