Technical description and composition of the SHARP LC-32SH340 TV, panel type and applicable modules. The composition of the modules.SHARP
Model: LC-32SH340 LC-32SH340E
Chassis / Version: 17MB60-4
Panel: LC320WUN (SC) (B1)
Inverter (backlight): 6632L-0623A
PWM Inverter: OZ9966SN
MOSFET Inverter: BA1556
Power Supply (PSU): 17PW82-2
PWM Power: FSDL321, FAN7529, NCP1392
MOSFET Power: FQT1N60C, 7N60A
MainBoard: 17MB60-4 .1
IC MainBoard: CPU: MSD9WB7PX; DRAM: HY5PS121621C; NAND Flash: NAND512-A
Tuner: DTOS403LH122E
Technical Specifications LC-32SH340
SHARP LC-32SH340
General recommendations for repairing TV LCD
Possible malfunctions
- The SHARP LC-32SH340 TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
With such manifestations, a malfunction is most likely to be detected in the 17PW82-2 power module. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches (FQT1N60C, 7N60A) and rectifier diodes of converters for possible short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback (OOS) stabilization circuits. PWM controllers (PWM) FSDL321, FAN7529, NCP1392, if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it 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 inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
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 indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the 17MB60-4 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, you need to check its CPU components: MSD9WB7PX; DRAM: HY5PS121621C; NAND Flash: NAND512-A. 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.
Before replacing the DTOS403LH122E tuner, if there is no channel tuning, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Attention! For users and owners of LC-32SH340 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
Service manual / schematic diagram -------------------> SHARP LC-32SH130E, LC-32SH130K, LC-32SH340E Chassis 17MB60-4m, power 17PW82-2.
FIRMWARE SPI FLASH -----------> SHARP LC-32SH340 LC-32SH340E, Main: 17MB60-4 .1, Panel: LC320WUN (SC)(B1)
1. Service Manual with Schematic Diagram 108 pages of 2011 FOR the LC-32SH130E, LC-32SH130K, LC-32SH340E.
2. Service Manual with Schematic Diagram 121 pages of 2006 FOR the model LC-22AD12E, LC-22LE22E, LC-32LE510E, LC-40LE510E, LC-32SH130E, LC-32SH130K, LC-32SH340E, LC-19LE510E, LC-19LE510K, LC-22LE510E, LC-22LE510K, LC-24LE510E, LC-24LE510K, LC-19LE510E, LC-19LE510EK, LC-22LE510E, LC-22LE510EK, LC-24LE510E, LC-24LE510EK - 17MB60 CHASSIS.
3. Service Manual with Schematic Diagram 116 pages of 2011 FOR the LC-32D12E (A), LC-40F22E (A), LC-40SH340K, LC-40SH340E, LC-32SH130K, LC-32SH130E, LC-32SH340E - 17MB60 CHASSIS .
The appearance of the MainBoard 17MB60-4 is shown in the figure below:The 17MB60-4 motherboard is made using the MSD9WB7PX-2 processor, combined with a scaler. For its work, two microchips of external random access memory (DDR) HY5PS121621C and read-only memory (ROM) NAND512-A are used. To ensure processor power, stabilizers 1.2V, 2.5V, 3.3V are used. For DDR, the voltage is 1.8V, for the power of NAND 3.3V. It is advisable to start the repair by checking the power supply of the standby mode 3.3V. Further, in the operating mode, it is necessary to check the operability of all linear stabilizers and voltage converters. If there is a backlight and no image, the power of the 5V or 12V LCD panel, depending on the type of panel used, can be measured directly on the LVDS connector. A typical malfunction is a NAND ROM software failure. At the same time, the TV does not turn on and the indicators on the panel blink. It is updated via the USB port if the software of the SPI FLASH chip in which the bootloader is located is not damaged, or if there is a mboot.bin file on the media, which can be used as standard SPI FLASH content.
17MB60-4 can be used in TVs:
SHARP LC-19LE510RU (Panel LC185EXN (SD)(A1)), SHARP LC-22LE510RU (Panel 22 дюйма), SHARP LC-32LE510RU (Panel LC320EUN SD V1), SHARP LC-32SH130E (Panel LC320WXN / 720p HD), SHARP LC-32SH340 LC-32SH340E (Panel LC320WUN (SC)(B1) ), TOSHIBA 19EL833R (Panel V185B1-LE2 LED), TOSHIBA 26LD833F (Panel LC260EXN (SD)(A3)), TOSHIBA 32DL833R 32DL834R (Panel LC320EXN SD A2 led).
The appearance of the power supply
Main features of the SHARP LC-32SH340 device:
Installed matrix (LCD panel) LC320WUN (SC) (B1).
To power the backlight, an inverter 6632L-0623A is used, it is controlled by the PWM controller OZ9966SN. As power elements of the inverter, keys of type BA1556 are used.
The necessary supply voltages for all nodes of the SHARP LC-32SH340 television are generated by the 17PW82-2 power supply module or its analogs using FSDL321, FAN7529, NCP1392 microchips and power switches of the FQT1N60C, 7N60A type.
MainBoard - the main board (motherboard) is a 17MB60-4 module using CPU chips: MSD9WB7PX; DRAM: HY5PS121621C; NAND Flash: NAND512-A and others.
The DTOS403LH122E tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320WUN-SCB1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1450: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + Dithering), CIE1931 74%
Response Time: 5 (G to G)
Frequency: 60Hz
Lamp Type: EEFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8/10-bit), 51 pins
Voltage: 12.0V