Technical description and composition of the ERISSON 32LH02 TV, type of panel and applicable modules. The composition of the modules.ERISSON
Model: 32LH02
Chassis / Version: MTK8201G
Panel: V260B1-L03
MainBoard: NUSTC_MTK8201G_V03_MP
IC MainBoard: CPU: MTK8201G; EEPROM: 24C16 / s29al008d70tf102;
Tuner: ET-8F2D-QF106L
Specifications 32LH02
ERISSON 32LH02
General recommendations for repairing TV LCD
It is advisable to start repairing an ERISSON TV with the NUSTC_MTK8201G_V03_MP chassis with a careful external inspection of both internal and external elements. Using visible changes in the state of components, it is usually possible to determine the further direction of troubleshooting and localization of the defect before the necessary measurements are taken. 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.
If the 32LH02 TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power supply module. In some cases, only the stabilizer or power converter of the control processor may be faulty, which is typical for some ERISSON models. Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
Power switches in pulsed power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The cause may be a malfunction of the PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
If ERISSON 32LH02 does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction of the display backlight, or their power converter - inverter. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the inverter itself, including in the secondary rectifier of the main PSU. When disabling protection in order to enable the diagnosis of a malfunction, special care should be taken, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software). Board repair and replacement of CPU chips: MTK8201G; EEPROM: 24C16 / s29al008d70tf102; are made in the presence of 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.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
FIRMWARE FOR SPI FLASH -----------> ERISSON 32LH02, Main: NUSTC_MTK8201G_V03_MP, Panel: BM080A002A
The appearance of MainBoard NUSTC_MTK8201G_V03_MP is shown in the figure below:NUSTC_MTK8201G_V03_MP
NUSTC_MTK8201G_V03_MP can be used on TVs:
ERISSON 32LH02 (Panel V260B1-L03), ERISSON 30LH02 (Panel V296W1-L01), ERISSON 26LH02 (Panel V260B1 L03).
Main features of the ERISSON 32LH02 device:
Installed matrix (LCD panel) V260B1-L03.
The required supply voltage for all nodes of the TV ERISSON 32LH02 provides a switching power supply.
MainBoard - the main board (motherboard) is a NUSTC_MTK8201G_V03_MP module, using CPU chips: MTK8201G; EEPROM: 24C16 / s29al008d70tf102; and others.
The ET-8F2D-QF106L tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: V260B1-L03
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.2M (6-bit + FRC), CIE1931 72%
Response Time: 3/5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 12 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V