Technical description and composition of the TOSHIBA 15CL7R TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 15CL7R
Chassis / Version: ML-05TA
Panel: LC150X02-TL01
Lamp backlight: 4 Lamp CCFL
Inverter (backlight): integrated into PSU
MainBoard: ML05HB 6870TH01A61
IC MainBoard: GM2221-LF, AT49BV040B, VCT49X3F
Tuner: TAEW-G053D // TAEW-G057D
Specifications 15CL7R
TOSHIBA 15CL7R
General recommendations for repairing TV LCD
Possible malfunctions
- TOSHIBA 15CL7R does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
In such cases, the fault should be sought first in the power module. It is necessary to measure its output voltages, and in case of their absence, check the operability of the power switches of the converters and rectifier diodes for the probability of a short circuit.
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, in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new, or obviously working.
- There is no image, there is sound, it reacts to the remote control, channels are switched. In some cases, the image appears when you turn on and immediately disappears.
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 the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
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, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the ML05HB 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). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its GM2221-LF, AT49BV040B, VCT49X3F chips and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the tuner TAEW-G053D // TAEW-G057D 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.
Owners and users of the TOSHIBA 15CL7R TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> TOSHIBA 15CL7R 15CL7E, 20CL7E, 15CL7A, 20CL7A, 15CL7H, 20CL7H, 15CL7M, 20CL7M, 15CL7R, 20CL7R, 15CL7T, 20CL7T. 2005year
Main features of the TOSHIBA 15CL7R device:Installed matrix (LCD panel) LC150X02-TL01.
To power the backlight, a converter is used, combined with a power supply.
The required supply voltage for all nodes of the TOSHIBA 15CL7R TV provides a switching power supply.
MainBoard - the main board (motherboard) is an ML05HB module using GM2221-LF, AT49BV040B, VCT49X3F and others.
Tuner TAEW-G053D // TAEW-G057D provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC150X02-TL01
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.0 inch
Resolution: 1024x768, XGA
Display Mode: TN, Normally White, Transmissive
Active Area: 304.128x228.096 mm
Surface: Antiglare (Haze 13%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 500: 1
Display Colors: 16.2M (6-bit + FRC)
Response Time: 5/11 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 20 pins
Voltage: 5.0V