Technical description and composition of the IZUMI TL22H615B TV, type of panel and applicable modules. The composition of the modules.Izumi
Model: TL22H615B
Chassis / Version: B.TD604C CVMV26L-C20
Panel: M220Z1-L03 Rev. C1 // LM215WF1
Inverter (backlight): integrated into PSU
PWM Inverter: TL494C
MOSFET Inverter: AO4606
Power Supply (PSU): SH17LP601A REV.5.0
PWM Power: LD7575PS
MainBoard: B.TD604C // CVMV26L-C20
IC MainBoard: Cpu: TDA15021H / N1C00, Scaler: NT68565FG, Eeprom: 416A2GLI = 24C16, Audio: TDA1517P
Tuner: TDQ-6F6 / T126CW
Technical Specifications TL22H615B
IZUMI TL22H615B
General recommendations for repairing TV LCD
The IZUMI TV made on the CVMV26L-C20 chassis, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. According to some external signs of a change in the state of some elements, it is sometimes possible to make assumptions about the nature of the defect, as well as determine the further direction of the troubleshooting. In some cases, faulty elements can be seen with the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
Malfunctions of the power module can be expressed in different ways, for example, the IZUMI TL22H615B does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of operability. It should be noted that with the same external manifestations, the processor power regulator (converter) may be faulty. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is cut off in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
In cases where the IZUMI TL22H615B TV has lost an image, and the sound is there and all other functions are operational, there is a possibility of an inverter (converter for powering the backlight) malfunction. When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power. When disabling protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
Repair of the CVMV26L-C20 motherboard should begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM. Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the TSUMV26KE-LF elements. BGA chip malfunctions are usually easy to detect by warming up.
Owners of the TL22H615B TV are recommended to repair only qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> IZUMI TL22H615B, Main: CVMV26L-C20, Panel: LM215WF1
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> SH17LP601A Power supply
The appearance of the MainBoard B.TD604C is shown in the figure below:B.TD604C
B.TD604C can be used in TVs:
AKAI LTA-22E307 (Panel M220Z1-L05 Rev.C1), IZUMI TL22H615B (Panel M220Z1-L03 Rev.C1), IZUMI TL19H615B (Panel SVA190WX02TB), IZUMI TL22H614B (Panel M220Z1-L03).
The appearance of the power supply
Main features of the IZUMI TL22H615B device:
Installed matrix (LCD panel) M220Z1-L03 Rev. C1 or LM215WF1.
To power the backlight, a converter is used, combined with a power supply, controlled by a TL494C PWM controller. As power elements of the inverter, keys of the AO4606 type are used.
The necessary supply voltages for all nodes of the IZUMI TL22H615B TV are generated by the SH17LP601A power module or its analogs using LD7575PS microcircuits.
MainBoard - the main board (motherboard) is a B.TD604C module, using Cpu chips: TDA15021H / N1C00, Scaler: NT68565FG, Eeprom: 416A2GLI = 24C16, Audio: TDA1517P and others.
The TDQ-6F6 / T126CW tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: M220Z1-L03
Type: a-Si TFT-LCD, Panel
Diagonal size: 22.0 inch
Resolution: 1680x1050, WSXGA +
Display Mode: TN, Normally White, Transmissive
Active Area: 473.76x296.1 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V