Technical description and composition of the LG 22LS4D-ZD TV, panel type and applicable modules. The composition of the modules.LG
Model: 22LS4D-ZD
Chassis / Version: LD83A
Panel: M220Z1-L03 Rev. C1 ZB
Inverter (backlight): PLLM-702A REV 1.0 2008.4.18
MOSFET Inverter: APM4546
Trans Inverter: EEL-22T
Power Supply (PSU): PLLM-702A REV 1.0 2008.4.18
PWM Power: SC08075, SC-080707C
MOSFET Power: A782PN
MainBoard: EAX50481902 (0) M19 / 228WDP-BZJ
IC MainBoard: AZ1117D-1,8EI, AZ1085S-3,3EI, 4925B L84A, LVC541A, MP2305DS, STMAV340, MAX3232C, NTP-3000A, HYB25DC256163CE-4
Tuner: TDFV-G135D
Control: IRC87002
Technical Specifications 22LS4D
LG 22LS4D-ZD
General recommendations for repairing TV LCD
Repair of an LG TV with the LD83A chassis should begin with a fault diagnosis, which involves a careful inspection of the external and internal elements of the device. 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 most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of the element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
If LG 22LS4D-ZD does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a failure of the PLLM-702A REV 1.0 power module on 2008.4.18. In some cases, only the processor power regulator may be faulty. In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should be started by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and A782PN transistors for the possibility of an avalanche or thermal breakdown.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip EFL-22T SC08075C, TF-2821 SC-03B SC-080707C can also cause a breakdown of the power switch of the converter.
If the LG 22LS4D-ZD TV does not have an image, but there is sound, the malfunction should be sought in the backlight lamp power converter (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the BP (power supply) for an overstated ESR. 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.
Repair or diagnostics of the motherboard M19 / 228WDP-BZJ LD73D / LD83A / LD83B EAX50481902 (0) should begin by checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software). When repairing an MB board, you need to check its components AZ1117D-1,8EI, AZ1085S-3,3EI, 4925B L84A, LVC541A, MP2305DS, STMAV340, MAX3232C, NTP-3000A, HYB25DC256163CE-4, Tuner: TDFV-G135D. Defective items should be replaced. If BGA chips are installed, their malfunction is usually localized by heating. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
Owners and users of the LG 22LS4D-ZD TV must 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 MANUAL -----------------------------> LG 22LS4D-ZD Chassis LD83A
Main features of the device LG 22LS4D-ZD:Installed matrix (LCD panel) M220Z1-L03 Rev. C1 ZB.
To power the backlight used inverter PLLM-702A. The transformer EEL-22T is installed in the inverter converter. As power elements of the inverter, keys of the APM4546 type are used.
The necessary supply voltages for all nodes of the LG 22LS4D-ZD TV are generated by the PLLM-702A power supply module or its analogs using SC08075, SC-080707C microchips and A782PN type power switches.
MainBoard - the main board (motherboard) is an EAX50481902 module, using chips AZ1117D-1,8EI, AZ1085S-3,3EI, 4925B L84A, LVC541A, MP2305DS, STMAV340, MAX3232C, NTP-3000A, HYB25DC256163CE-4 and others.
The TDFV-G135D tuner provides television reception and channel tuning.
Information from an alternative source:
LG 22LS4D-ZD ARUGLA chassis LD83A
Panel Type (Matrix): M220Z1-L03 Rev. C1 ZB,
Motherboard: M19 / 228WDP-BZJ LD73D / LD83A / LD83B EAX50481902 (0), AZ1117D-1,8EI x2, AZ1117D-2,5EI, AZ1117D-3,3EI, AZ1085S-3,3EI x2, 4925B L84A, LVC541A, ATML818 x2, ATMEL822, 25X32VSIGE x2, MP2305DS, STMAV340 x2, MAX3232C, NTP-3000A, HYB25DC256163CE-4 x2, Tuner: TDFV-G135D
PSU & Inverter: PLLM-702A REV 1.0 2008.4.18, APM4546 x2, EFL-22T SC08075C, TF-2821 SC-03B SC-080707C, A782PN
Remote control: IRC87002
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