Technical description and composition of the PHILIPS 32PF4320 TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 32PF4320 / 10
Chassis / Version: LC4.5E AA
Panel: LC320W01
T-CON: 6870C-0029B
Inverter (backlight): 6632L-0066B, 6632L-0067B
Power Supply (PSU): PLCD190P1 3122 133 32806
PWM Power: TEA1533AT, L6562D (PFC), TEA1601T
MainBoard: 3139_123_60721 WK447.4 3139 267 12292, Audio: 3139 188 89051
IC MainBoard: gm1501, K4D263238F-UC50, TDA9178T
Tuner: UV1318S / A I H-3
Specifications 32PF4320
PHILIPS 32PF4320
General recommendations for repairing TV LCD
Possible malfunctions
- PHILIPS 32PF4320 does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
In such cases, the fault should be sought first in the PLCD190P1 power supply module. It is then necessary to measure its output voltages and, if they are absent, you should check the power switches and rectifier diodes of the converters for the probability of a short circuit.
In case of diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key 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. PWM controllers TEA1533AT, L6562D (PFC), TEA1601T, in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new, or obviously working.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
These manifestations can be triggered by the power module, or by inverter defects, as well as by the distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are in good working condition, then you need to check the converter keys and the secondary windings of the transformers.
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 TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the 3139_123_60721 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - gm1501, K4D263238F-UC50, TDA9178T. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
In cases where there is no tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner UV1318S / A I H-3. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Once again, remind users! Attempts to self-repair a PHILIPS 32PF4320 TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
Service manual and schematic diagram 32PF4320/10 Chassis LC4.5E AA
PSU -------------> PLCD190P1 schematic diagram
The appearance of MainBoard 3139_123_60721 is shown in the figure below:
3139_123_60721
3139_123_60721 can be used in TVs:
PHILIPS 32PF3320 / 10 (Panel T315XW01 V.F), PHILIPS 32PF4320 / 10 (Panel LC320W01).
The appearance of the power supply
Main features of the PHILIPS 32PF4320 device:
Installed matrix (LCD-panel) LC320W01.
The matrix control uses the Timing Controller (T-CON) 6870C-0029B.
An inverter 6632L-0066B is used to power the backlight.
The necessary supply voltages for all nodes of the PHILIPS 32PF4320 TV are generated by the PLCD190P1 power supply module or its analogs using TEA1533AT, L6562D (PFC), TEA1601T microcircuits.
MainBoard - the main board (motherboard) is a module 3139_123_60721, using microchips gm1501, K4D263238F-UC50, TDA9178T 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: LG.Philips LCD
Model: LC320W01-SL20
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (8-bit)
Response Time: 8/10 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 18 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V