Technical description and composition of the IZUMI TL19H405B TV, panel type and applicable modules. The composition of the modules.Izumi
Model: TL19H405B
Chassis / Version: B.SPC81B-1
Panel: M190MWW3
Power Supply (PSU): CEM-1.E141940
MainBoard: B.SPC81B-1
IC MainBoard: Spi Flash: 25Q80, Eeprom: 24C32, Audio: YD1517P
Tuner: TDQ-6F6 / T126CW
Technical Specifications TL19H405B
IZUMI TL19H405B
General recommendations for repairing TV LCD
Repair of the IZUMI TV with the B.SPC81B-1 chassis should begin with a careful external examination of all its components and modules. Often, by the external signs and nature of the damage to the elements, it becomes possible to draw some conclusions and determine a further algorithm for finding a defect before making the necessary measurements at control points. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
Faults in the CEM-1.E141940 power module can be expressed in different ways, for example, the IZUMI TL19H405B does not turn on at all and the control lamps on its front panel do not light up and do not blink, and there are no signs of operability. It should be noted that with the same external manifestations, the processor power regulator (converter) may be faulty. When diagnosing and repairing the power supply, first of all, replace the swollen capacitors of the filter of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes and transistors in the primary circuit.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller, which can only be checked replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If the IZUMI TL19H405B TV does not have an image, but there is sound, the malfunction should be sought in the backlight lamp power converter (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overstated ESR. When diagnosing a malfunction of the inverter with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
Repair or diagnostics of the B.SPC81B-1 motherboard should begin by checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software). In some cases, they require checking or replacing (if necessary) the elements of the MB board (SSB) - Spi Flash: 25Q80, Eeprom: 24C32, Audio: YD1517P. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
For TL19H405B TV owners, 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!
FIRMWARE FOR SPI FLASH -----------> IZUMI TL19H405B, Main: B.SPC81B-1, Panel: M190MWW3
In cases where a failure has occurred in Winbond's SPI FLASH software, we recommend replacing the chip with a new one. Often, faulty Winbond microcircuits can temporarily restore their functionality after temperature exposure, for example, when a soldering station is heated by a hairdryer. Sometimes this is enough to read the regular contents of the software.
Repair MainBoard
The appearance of the MainBoard B.SPC81B-1 is shown in the figure below:
B.SPC81B-1
B.SPC81B-1 can be used in TVs:
AKAI LTC-15S04 LTC-15S04M (Panel LTA150XH-L06), BBK LD2424HDU (Panel HT235F01-100), FUSION FLTV-19W6 (Panel M190A1-P0A), FUSION FLTV-22W6 (Panel CLAA215FA), IZUMI TL22F405R (Panel M215HW01 V.0), IZUMI TL22F405B (Panel M215HW01 V.0), IZUMI TL19H405B (Panel M190MWW3).
Main features of the IZUMI TL19H405B device:
Installed matrix (LCD-panel) M190MWW3.
The formation of the necessary supply voltages for all nodes of the IZUMI TL19H405B TV is carried out by the power module CEM-1.E141940, or its analogues.
MainBoard - the main board (motherboard) is a B.SPC81B-1 module, using Spi Flash chips: 25Q80, Eeprom: 24C32, Audio: YD1517P and others.
The TDQ-6F6 / T126CW tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: IVO
Model: M190MWW3 R1
Type: a-Si TFT-LCD, Panel
Diagonal size: 19.0 inch
Resolution: 1440x900, WXGA +
Display Mode: TN, Normally White, Transmissive
Active Area: 408.24x255.15 mm
Surface: Antiglare, Hard coating
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 5 (Tr + Td)
Frequency: 60Hz
Lamp Type: 2 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V