Technical description and composition of the TOSHIBA 37XV500PR TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 37XV500PR
Chassis / Version: PE0532
Panel: LC370WUN (SA) (B1)
Lamp backlight: EEFL
Inverter (backlight): PPW-EE37FV-0 (N) Rev1.0
Power Supply (PSU): PE0531 V28A000711B1
PWM Power: A6169 (8), STR-Z2589, 2A20112 (PFC)
MOSFET Power: 10N60, P10NK80
MainBoard: PE0532 V28A000710B1
IC MainBoard: FLI32652H, HY5PS121621C, CXB1444R, STA333W, 0747EFI T5CB5-6UK1 F1789ZAE
Tuner: ENG37E11GF
Specifications 37XV500PR
TOSHIBA 37XV500PR
General recommendations for repairing TV LCD
Possible malfunctions
- The TOSHIBA 37XV500PR does not turn on. There are no signs of operability. The indicators on the front panel do not light up and do not blink, the TV does not respond to the control buttons.
Most likely in this case, the main switching power supply (IIPS) PE0531 is faulty. It is then necessary to measure its output voltages and, if they are absent, you should check the power switches (10N60, P10NK80) and the rectifier diodes of the converters for a short circuit probability.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers A6169 (8), STR-Z2589, 2A20112 (PFC), in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new, or obviously working.
- There is no image, but there is sound and all the other functions of the TV work. The image sometimes for a second appears immediately after turning on and disappears.
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.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after they are finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements FLI32652H, HY5PS121621C, CXB1444R, STA333W, 0747EFI T5CB5-6UK1 F1789ZAE. BGA chip malfunctions are usually easy to detect by warming up.
Before changing the tuner ENG37E11GF, if there is no possibility of tuning to television channels, you should make sure that there are supply voltages, which must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Attention TV owners! TOSHIBA 37XV500PR self-repair attempts are not recommended by the manufacturer and can lead to serious negative consequences!
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)).
Main features of the TOSHIBA 37XV500PR device:
Installed matrix (LCD panel) LC370WUN (SA) (B1).
To power the backlight used inverter PPW-EE37FV-0.
The necessary supply voltages for all nodes of the TOSHIBA 37XV500PR TV are generated by the PE0531 power module or its analogs using A6169 (8), STR-Z2589, 2A20112 (PFC) microcircuits and power switches of the type 10N60, P10NK80.
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
TOSHIBA 37XV500PR LCD TV with LC370WUN LCD, 37 "(94 cm) diagonal display in 16: 9 format. 500 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 1300: 1 Dynamic contrast ratio of 18000: 1 is achieved by special control of the backlight operation.The design and technical capabilities of the TV provide for viewing broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in a graphic resolution of 1080p (Full HD) standard. the signal can be processed in analogue systems PAL, SECAM, NTSC .. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
The power of the acoustic system of sound 20 W (2x10 W) provide 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 x3, S-Video, 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, 1280x1024.
The power consumed by the TV in the operating mode from the network is 183 watts.
Overall dimensions: with stand 902x635x258 mm, without stand 902x590x94 mm.
TV Weight: with stand: 19.1 kg, without stand: 16.1 kg.
Attention! The TOSHIBA 37XV500PR 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!