Technical description and composition of the PHILIPS 32PF7320 TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 32PF7320 / 10
Chassis / Version: LC4.3E AA
Panel: LC320W01 (SL) (06)
Power Supply (PSU): PLCD170P2
PWM Power: NCP1207A (8pin PWM), DLA001D (PWM = L6598), L6562D (PFC)
MainBoard: 3139-123-6093.1 WK509.2
IC MainBoard: CPU: TDA15021H / N1A1, Scaler: GM1501-LF-BD, DRAM: K4D263238F
Tuner: UV1318S / A I H-3
Specifications 32PF7320
PHILIPS 32PF7320
General recommendations for repairing TV LCD
Like all other televisions, it is advisable to start PHILIPS 32PF7320 / 10 with a careful inspection of both external and internal elements and modules. Often, for certain external signs, it is possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a hint in the assumptions about the causes and consequences of the malfunction.
Power Module Repair
Sometimes the PHILIPS 32PF7320 / 10 TV simply 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 a failure of the common power module. Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse is broken, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network and the key transistor.
In most cases, a breakdown of the N-Fet converter key does not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
When using a power factor correction unit (PFC) in the power modules, troubleshooting becomes somewhat more complicated and requires additional experience and knowledge of the device for their operation.
Inverter Repair
If the PHILIPS 32PF7320 / 10 does not have an image, there is sound and the channels switch, there is a possibility of a malfunction of the display backlight, or their power converter - inverter. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the inverter itself, including in the secondary rectifier of the main PSU.
Repairing the inverter is difficult because in case of any malfunction or emergency, even with uneven wear of the lamps, a protection is triggered, which turns it off for fire safety. Diagnostics become impossible and protection needs to be disabled.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
Attention! For users and owners of 32PF7320 / 10 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-serviceability of the device.
Service manual and schematic diagram 32PF7320/10 Chassis LC4.3E AA
FOR MODELS 26PF4310/10, 26PF5320/10, 32PF5320/1, 32PF7320/10, 26PF4310/10, 26PF5320/1, 32PF5320/1, 32PF7320/10, 26PF5320/1, 32PF5320/10, 32PF7320/10, 26PF4310/10, 26PF5320/1, 32PF5320/1, 32PF7320/1, 26PF4310/10, 26PF5320/10, 32PF5320/1, 32PF7320/10, 26PF4310/1, 26PF5320/10, 32PF5320/10, 32PF7320/10
The appearance of MainBoard 3139-123-6093.1 is shown in the figure below:3139-123-6093.1
3139-123-6093.1 can be used in televisions:
PHILIPS 26PF3320/10 (Panel QD26HL02-REF01), PHILIPS 26PF4310/10 (Panel QD26WL01 REV:01), PHILIPS 32PF5320/10 (Panel L0315T3LZ33), PHILIPS 32PF7320/10 (Panel LC320W01(SL)(06)).
PSU Advanced
The PLCD170P2 power module is installed in the 32PF7320 / 10 TV using the PFC (Power Factor Correction) circuitry acting as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the L6562D PWM controller does not allow the input rectifier filter's electrolytic capacitor to be connected to the network directly through open diodes, when the reactance (about 15-30 ohms at a frequency of 50 Hz) determines the charge current. As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current will repeat the phase and shape of the sine wave of the input voltage. The health check of the PFC unit is carried out by measuring the DC voltage on the capacitor of the rectifier network. In operating mode, it should be around 380V, in standby approximately 300V.
The appearance of the power supply
Main features of the PHILIPS 32PF7320 device:
The matrix (LCD panel) LC320W01 (SL) (06) is installed.
The necessary supply voltages for all nodes of the PHILIPS 32PF7320 TV are generated by the PLCD170P2 power module or its analogs using NCP1207A (8pin PWM), DLA001D (PWM = L6598), L6562D (PFC) microcircuits.
MainBoard - the main board (motherboard) is a module 3139-123-6093.1, using CPU chips: TDA15021H / N1A1, Scaler: GM1501-LF-BD, DRAM: K4D263238F 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-SL06
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