Technical description and composition of the PHILIPS 32PF5321 TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 32PF5321 / 12
Chassis / Version: LC4.31E AA
Panel: LQ315T3LZ33
Lamp backlight: 18 Lamp CCFL
T-CON: CPWBX3298TPZ E
Inverter (backlight): RDENC2219TPZ Z IM3812
Power Supply (PSU): PLCD190P1
PWM Power: L6562D, TEA1533AT, TEA1601T
MOSFET Power: 15N60C3, P4NK60Z, 04N60C3
MainBoard: WK551.3 3139 123 6117.3
IC MainBoard: gm1501-LF, K4D263238F, TDA9974AEL / 8/07
Tuner: UV1318S / A I H-3
Control: IR: 3139 123 6171.1 WK537.5
Specifications 32PF5321
PHILIPS 32PF5321
General recommendations for repairing TV LCD
Possible malfunctions
- PHILIPS 32PF5321 does not turn on and does not show any signs of operability at all. Does not blink indicators and does not respond to control buttons.
With such manifestations, the DAC-12M018 power supply module usually fails. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of power switches (BZ6GN4D, BZ6N19) of converters and rectifier diodes for the presence of a possible short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. SG6841SZ PWM controllers, in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
A 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 of the inverter, you must ring out power switches in the converter for breakdown and the secondary windings of the transformers for an open.
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 WK551.3 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). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - gm1501-LF, K4D263238F, TDA9974AEL / 8/07 with new or obviously good ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all, check the voltage of the tuner UV1318S / A I H-3 and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Once again, remind users! Attempts to independently repair the PHILIPS 32PF5321 TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
Service manual and schematic diagram PHILIPS 32PF5321 Chassis LC4.31E AA
The appearance of the MainBoard WK551.3 is shown in the figure below:WK551.3
The appearance of the power supply
Main features of the PHILIPS 32PF5321 device:
Installed matrix (LCD panel) LQ315T3LZ33.
The matrix control uses the Timing Controller (T-CON) CPWBX3298TPZ.
To power the backlight used inverter RDENC2219TPZ.
The necessary supply voltages for all nodes of the PHILIPS 32PF5321 TV are generated by the PLCD190P1 power module or its analogs using L6562D, TEA1533AT, TEA1601T microcircuits and power switches of the type 15N60C3, P4NK60Z, 04N60C3.
MainBoard - the main board (motherboard) is a module WK551.3, using microchips gm1501-LF, K4D263238F, TDA9974AEL / 8/07 and others.
The UV1318S / A I H-3 tuner allows you to receive television programs and tune to channels.
Additional technical information about the panel:
Brand: SHARP
Model: LQ315T3LZ33
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: ASV, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 23%), Hard coating (2H), Antireflection
Brightness: 500 cd / m²
Contrast Ratio: 700: 1
Display Colors: 16.7M (8-bit)
Response Time: 12/12 (Tr / Td); 6 (G to G)
Frequency: 60Hz
Lamp Type: 18 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V