REPAIR / SERVICING TV TOSHIBA 32RL953RB

Technical description and composition of the TOSHIBA 32RL953RB TV, type of panel and applicable modules. The composition of the modules.
TOSHIBA LED
Model: 32RL953RB
Chassis / Version: PE1070
Panel: LTA320HN03
LED backlight: LJ64-03204A 32DOWN LJ07-00929A
LED driver (backlight): SSL320_3E2B
PWM LED driver: SSL100SN
MOSFET LED driver: STA3250, APM4015P, SF10A400HD
Power Supply (PSU): DPS-115EP A, V71A00023000
PWM Power: A6069H (7pin), 1608B (PFC), DDA014
MainBoard: PE1070 V28A00140701
IC MainBoard: CPU: MSD381USV-V6; DRAM: K4B1G1646; NAND Flash: TC58NVG1S3E; SPI Flash: MX25L1606EM2I
Tuner: ENGS7305D5F
Control: IR: V28A00140101 PE1069
Specifications 32RL953
TOSHIBA 32RL953RB
General repair guidelines for TV LCD LED
Possible malfunctions
- The TOSHIBA 32RL953RB TV does not turn on, does not respond to the remote control and buttons on the control panel, does not light up or blink indicators.
In some of these cases, the main switching power supply, the DPS-115EP module, turns out to be faulty. It is necessary to measure its output supply voltage, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the probability of breakdown in semiconductor PN junctions.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
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. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) A6069H (7pin), 1608B (PFC), DDA014, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously working ones.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
The most likely in these cases is a malfunction of the LED backlight. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, you can sometimes detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the PE1070 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). If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - CPU: MSD381USV-V6; DRAM: K4B1G1646; NAND Flash: TC58NVG1S3E; SPI Flash: MX25L1606EM2I. Defective components should be replaced.
In cases where there is no tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the ENGS7305D5F tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.

Attention TV owners! Attempts at self-repair of TOSHIBA 32RL953RB are not recommended by the manufacturer and can lead to serious negative consequences!

Backlight: SLED_2011SGS32_L_5630_36_H1_REV1.0 & SLED_2011SGS32_R_5630_36_H1_REV1.0

Service Manuals with Schematic Diagrams 134 pages 2012 on model ---------->> 32TL933, 40TL933, 46TL933, 32TL936, 40TL936, 46TL936, 32TL963, 40TL963, 46TL963, 32TL966, 40TL966, 46TL966, 32UL975, 40UL975, 46UL975, 23RL933, 32RL933, 40RL933, 23RL936, 32RL936, 40RL936, 23SL970, 32SL970, 40SL970, 32RL953, 40RL953, 42VL963, 47VL963, 55VL963, 42XL975, 47XL975, 55XL975, 40ML933, 46ML933

The appearance of the MainBoard PE1070 is shown in the figure below:
PE1070
PE1070 can be used in TVs:
TOSHIBA 23RL933RB (Panel LC230EUE SE A1), TOSHIBA 32RL933RB (Panel LTA320HN03 T03), TOSHIBA 32RL955RB (Panel LTA320HN03 T03), TOSHIBA 40RL955RB (Panel LTA400HM22 T03), TOSHIBA 32RL953RB (Panel LTA320HN03), TOSHIBA 40RL933RB (Panel LTA400HM22 LJ96-06007A).
The appearance of the power supply
Main features of the TOSHIBA 32RL953RB device:
Installed matrix (LED panel) LTA320HN03.
The LED driver SSL320_3E2B is used to power the backlight LEDs, it is controlled by the SSL100SN PWM controller. As the power elements of the LED driver, keys of the type STA3250, APM4015P, SF10A400HD are used.
The necessary supply voltages for all nodes of the TOSHIBA 32RL953RB TV are generated by the DPS-115EP power module or its analogs using A6069H (7pin), 1608B (PFC), DDA014 microcircuits.
MainBoard - the main board (motherboard) is a PE1070 module, using CPU chips: MSD381USV-V6; DRAM: K4B1G1646; NAND Flash: TC58NVG1S3E; SPI Flash: MX25L1606EM2I and others.
The ENGS7305D5F tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320HN03-T
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 5.5%)
Brightness: 400 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 1.07B (10-bit), CIE1931 70%
Response Time: 16 (Max.) (Tr + Td)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V