Technical description and composition of the IZUMI TL22H614B TV, type of panel and applicable modules. The composition of the modules.Izumi
Model: TL22H614B
Chassis / Version: B.TD604C
Panel: M220Z1-L03 // M220Z1-L05 Rev. C1
Inverter (backlight): integrated into PSU
PWM Inverter: TL494C
Power Supply (PSU): SH17LP601A REV5.0 SER 6589252
PWM Power: LD7575PS
MainBoard: B.TD604C 7063 FORM220Z1-01
IC MainBoard: Cpu: TDA15021H / N1C00, Scaler: NT68565FG, Eeprom: 416A2GLI = 24C16, Audio: TDA1517P
Tuner: TDQ-6F6 / T126CW
Technical Specifications TL22H614B
IZUMI TL22H614B
General recommendations for repairing TV LCD
Possible malfunctions
- The IZUMI TL22H614B does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
In such cases, the fault should be sought first in the SH17LP601A power supply module. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches and rectifier diodes of the converters for a possible short circuit.
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.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWMs) of the LD7575PS, if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, 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 B.TD604C 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). Board repair and chip replacement Cpu: TDA15021H / N1C00, Scaler: NT68565FG, Eeprom: 416A2GLI = 24C16, Audio: TDA1517P are made with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
If the TV works normally from external devices but does not tune into television channels, the TDQ-6F6 / T126CW tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
TV users and owners need to remember that attempts to repair the IZUMI TL22H614B TV independently, without the appropriate qualifications and necessary experience, can lead to serious negative consequences!
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 TL22H614B device:
Installed matrix (LCD panel) M220Z1-L03 or M220Z1-L05 Rev. C1.
To power the backlight, a converter is used, combined with a power supply, controlled by a TL494C PWM controller.
The necessary supply voltages for all nodes of the IZUMI TL22H614B 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
TV LCD TL22H614B
Display diagonal: 22 "(55 cm)
Screen Format: 16:10
Resolution: 1680x1050
Brightness: 500 cd / m2
Contrast: 700: 1
Viewing Angle: 160 °
Pixel Response Time: 8 ms
Progressive scan: yes
TV Standards: SECAM
Teletext: yes
DTV Formats: 480i, 576i
Stereo sound: yes
Sound power: 5 W (2x2.5 W)
Acoustics: two speakers
Interface: AV, Audio x2, S-Video, RGB, VGA
TV Weight: 5.1 kg