Technical description and composition of the LG RZ-23LZ50 TV, panel type and applicable modules. The composition of the modules.LG
Model: RZ-23LZ50
Chassis / Version: ML-041A
Panel: LC230W01 (B2)
Inverter (backlight): YPNL-M007C R2.0LC230W01-A294V-0
PWM Inverter: BIT3106
MOSFET Inverter: 4532GM
Trans Inverter: XT-12200-2222R4-0425
Power Supply (PSU): LCD23L REV1.1
PWM Power: L6561D (PFC), KA339D, KA34063A
MOSFET Power: 20N60S5, 11N80C3
MainBoard: ML-041A
IC MainBoard: Genesis gm5221H, RZRT-26.30RZ50 V4.7, M52758FP, MST9883C, SM5301BS
Tuner: TAEW-G051D 6700VS0003A
Control: 6711R1P072B
Technical Specifications RZ-23LZ50
LG RZ-23LZ50
General recommendations for repairing TV LCD
Repair of an LG TV with the ML-041A chassis should begin with a careful external inspection of all its components and modules. Many visible changes in the state of the elements make it possible to determine the further direction of troubleshooting and localization of the defect. If charred resistors, swollen electrolytic or cermet capacitors, ring cracks in the soldered terminals of transformers or heating elements are detected, it is advisable to establish the causes and consequences of the malfunction that has arisen, as well as to check the connected elements and assemblies.
Sometimes the LG RZ-23LZ50 TV just does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the CD-23L Samsung LCD23L REV1.1 general power supply module. If it is working properly, you need to check the processor batteries on the SSB (Main Board). In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should begin 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 transistors 20N60S5, 11N80C3 for the possibility of an avalanche or thermal breakdown.
The reasons for the breakdown of the power switch in switching power supplies (IIPS) can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip L6561D, CC04B, KA339D, KA34063A or broken resistors in its harness.
Sometimes the LG RZ-23LZ50 TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the backlight converter, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all electrolytic capacitors of the filter according to the power supply of the inverter itself, including in the power supply unit (power supply unit). It should be remembered that when protection is disabled in order to diagnose a malfunction, there is always a risk of failure of the power elements of the inverter. After repair, it is necessary to restore all standard converter protection circuits.
In cases of attempts to repair the motherboard, it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). BGA chips can in most cases be diagnosed by local heating. 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 Genesis gm5221H, RZRT-26.30RZ50 V4.7, M52758FP, MST9883C, SM5301BS, SM5301BS and other possible malfunctioning chips. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Attention to users! Self-repair of the LG RZ-23LZ50 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual / schematic diagram -------------> LG RZ-23LZ50 Chassis ML-041A
The appearance of the MainBoard ML-041A is shown in the figure below:ML-041A
ML-041A can be used in TVs:
LG RZ-23LZ50 (Panel LC230W01 (B2)), LG RZ-26LZ50 (Panel LC260W01 (A5)(KA)).
PSU Advanced
The RZ-23LZ50 model uses an LCD23L power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, it is a boost converter based on the L6561D PWM controller, which eliminates the charge current of the electrolytic capacitor of the rectifier filter directly from the network through open diodes when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the device LG RZ-23LZ50:
The matrix (LCD panel) LC230W01 (B2) is installed.
To power the backlight, an inverter YPNL-M007C is used, it is controlled by the BIT3106 PWM controller. The transformer XT-12200-2222R4-0425 is installed in the inverter converter. As power elements of the inverter, keys of type 4532GM are used.
The necessary supply voltages for all nodes of the LG RZ-23LZ50 TV are generated by the LCD23L power supply module or its analogs using L6561D (PFC), KA339D, KA34063A microcircuits and power switches of the type 20N60S5, 11N80C3.
MainBoard - the main board (motherboard) is an ML-041A module using Genesis microchips GM5221H, RZRT-26.30RZ50 V4.7, M52758FP, MST9883C, SM5301BS and others.
Tuner TAEW-G051D 6700VS0003A provides the reception of television programs and tuning to channels.
Information from an alternative source:
LG RZ-23LZ50, chassis ML-041A
Panel Type (Matrix): LC230W01 (B2), KZ4E064H11 \ LPZ4E122S8L \ 0426 V022, BUF11702, T1451A, G900L-0012B
Motherboard :, Genesis gm5221H, RZRT-26.30 \ RZ50 V4.7, M52758FP, MST9883C, SM5301BS, RZ-23LZ50 V: 4.6, Tuner: 6700VS0003A \ TAEW-G051D
Inverter: YPNL-M007C R2.0 \ LC230W01-A2 \ 94V-0, XT-12200-2222R4-0425 - 12 pcs., 4532GM - 12 pcs., A393F - 2 pcs., BIT3106 - 2 pcs.
PSU: CD-23L \ Samsung LCD23L REV1.1, LCD-23LP \ SC-0441D, LCD-23LM \ SC-0439D, L6561D, 20N60S5, 11N80C3, CC04B, M183AJ, KA339D, KA34063A
Remote control: 6711R1P072B,
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC230W01-B2
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.0 inch
Resolution: 1280x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 501.12x300.67 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 500: 1
Display Colors: 16.7M (8-bit), CIE1931 70%
Response Time: 15/10 (Tr / Td)
Frequency: 60Hz
Lamp Type: 12 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 20 pins
Voltage: 12.0V
