Technical description and composition of the LG M198WA-BZH TV, panel type and applicable modules. The composition of the modules.LG
Model: M198WA-BZH Monitor
Chassis / Version: LP69G
Panel: M190A1-L02 Rev. C2 ZB
Inverter (backlight): YP1504PG 6871TPT318G REV 1.3
PWM Inverter: OZL68GN
MOSFET Inverter: 04N60C3
Trans Inverter: IT0251 NY0722
Power Supply (PSU): YP1504PG 6871TPT318G REV 1.3
PWM Power: ICE38S02
MOSFET Power: P2103NVG
MainBoard: EAX34000306 (0)
IC MainBoard: HY5DU281622FTP-5, EH14A, YDA138-E, BA33BC0, MP1583DN, MX25L4005AM2C, 24C64AN, CS4352CZZ
Tuner: EBL35311207 TAFT-W005D.704D0814
Control: LG MKJ32816601, LG MKJ32816602
Appearance
LG M198WA-BZH
General recommendations for repairing TV LCD
Possible malfunctions
The LG M198WA-BZH monitor does not turn on at all. There is no reaction to the remote control or to the control buttons from the front panel. Indicator lights do not light or flash.
With such manifestations, the YP1504PG power module usually fails. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches (P2103NVG) and rectifier diodes of the converters for possible short circuit.
In case of breakdowns in the secondary circuits, the converter can emergencyly operate in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM ICE38S02. It is checked only by replacement with a known good one.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and 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 to the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuit should be restored immediately after the repair is completed.
- The monitor does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the EAX34000306 (0) 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). When repairing an MB board, it is necessary to check its components HY5DU281622FTP-5, EH14A, YDA138-E, BA33BC0, MP1583DN, MX25L4005AM2C, 24C64AN, CS4352CZZ. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
For owners of the M198WA-BZH monitor, we recommend that you contact qualified personnel with the necessary work experience for repairs! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
Service manual / schematic diagram ---------------------> LG M198WA-BZH Chassis LP69G.
CHASSIS NO. : LP69G; MODEL: M198WA, M198WA-BMH.A**MLP, M228WA, M228WA-BMH.A**MLP
Main features of the device LG M198WA-BZH:Installed matrix (LCD panel) M190A1-L02 Rev. C2 ZB.
To power the backlight, an inverter YP1504PG is used, it is controlled by the PWM controller OZL68GN. The transformer IT0251 NY0722 is installed in the inverter converter. As power elements of the inverter, keys of type 04N60C3 are used.
The necessary supply voltages for all nodes of the LG M198WA-BZH TV are generated by the YP1504PG power supply module or its analogs using ICE38S02 microchips and power switches of the type P2103NVG.
MainBoard - the main board (motherboard) is an EAX34000306 module, using HY5DU281622FTP-5, EH14A, YDA138-E, BA33BC0, MP1583DN, MX25L4005AM2C, 24C64AN, CS4352CZZ and other chips.
Tuner EBL35311207 TAFT-W005D.704D0814 provides the reception of television programs and tuning to channels.
Information from an alternative source:
LG Flatron M198WA-BZH.ARUQLP chassis LP69G
Panel Type (Matrix): M190A1-L02 Rev. C2 ZB
Motherboard: EAX34000306(0) CHASSIS: LP69G, HY5DU281622FTP-5, EH14A, YDA138-E, BA33BC0, RF78M05R, MP1583DN, MX25L4005AM2C, ATMEL724 24C64AN, CS4352CZZ, STI24C02RP x2, Tuner: EBL35311207 TAFT-W005D.704D0814, PSU &
Invertor: YP1504PG 6871TPT318G REV 1.3, ICE38S02, 04N60C3, OZL68GN, NIKOS P2103NVG x2, Tr-r: IT0251 NY0722 x2
Remote control: LG MKJ32816601, LG MKJ32816602 ,
Additional technical information about the panel:
Brand: CMO
Model: M190A1-L02
Type: a-Si TFT-LCD, Panel
Diagonal size: 19.0 inch
Resolution: 1440x900, WXGA +
Display Mode: TN, Normally White, Transmissive
Active Area: 410.4x256.5 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 850: 1
Display Colors: 16.2M (6-bit + FRC)
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
