Technical description and composition of the PHILIPS 32PF3321 TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 32PF3321 / 12
Chassis / Version: LC4.31E AA
Panel: CLAA320WB02 (P)
Inverter (backlight): PH-BLC164 VER 3.0
PWM Inverter: OZ964SN
Trans Inverter: TMP D6801
Power Supply (PSU): PLCD190P1 3122 137 23171 // DPS-188AP
PWM Power: TEA1533AT (SOP14), L6562D (PFC), TEA1601T (SOP16)
MainBoard: 3139-123-6117.2 WK542.2
IC MainBoard: TDA9974, GM1501-LF
Tuner: UL1318S / AI H-3
Specifications 32PF3321
PHILIPS 32PF3321
General recommendations for repairing TV LCD
Repair of the PHILIPS 32PF3321 / 12 TV should begin with a careful external examination of all its constituent elements and modules. Often, based on certain external signs, it may be 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. If ring cracks are detected in the soldering of the terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of an already known typical malfunction.
A malfunction of the power supply is often manifested corny - the TV does not turn on, does not make any sounds, does not light up and does not blink with any indicators. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is cut off in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller TEA1533AT (SOP14), L6562D (PFC), TEA1601T (SOP16), which it is desirable to check by replacement, are subject to verification.
If PHILIPS 32PF3321 does not have an image, there is sound and the channels are switched, 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. Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
On the motherboard 3139-123-6117.2, in case of a malfunction, you should first check the performance of all the stabilizers and power converters of the microcircuits, and also, if necessary, update the software (software). 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 TDA9974, GM1501-LF chips and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If a tuner UL1318S / AI H-3 is suspected, it is first necessary to verify the correctness of the software, as well as the presence of the necessary voltage levels and impulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
Attention! For users and owners of 32PF3321 TVs who do not have the appropriate qualifications, knowledge and experience, we strongly recommend against attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
Service manual and schematic diagram 32PFL3321 Chassis LC4.31E AA
FOR MODELS 26PF5321/10/12, 32PF5321/10/12, 37PF5321/10/12, 26PF7321/12, 32PF7321/12, 37PF7321/10/12, 42PF5421/10.
PSU -------------> PLCD190P1 schematic diagram.
The appearance of MainBoard 3139-123-6117.2 is shown in the figure below:
3139-123-6117.2
3139-123-6117.2 can be used in televisions:
PHILIPS 26PF4311S/10 (Panel LC260WX2(SL)(B2)), PHILIPS 26PF5521 (Panel PLCD170P2), PHILIPS 26PF7321/12 (Panel LC260WX2-SL04), PHILIPS 32PF4311S/10 (Panel LC320W01 (sl)(06)), PHILIPS 32PF4311S/10 (Panel LC320W01(SL)(06)), PHILIPS 32PF5331/12 (Panel T315XW01 V9), PHILIPS 32PF7321 (Panel LC320W01), PHILIPS 32PF7331/12 (Panel LC320W01), PHILIPS 32PFL3321S/60 (Panel LC320W01 (SL)(06)), PHILIPS 37PFL3321/10 (Panel LC370WX1-SL04), PHILIPS 32PF3321/12 (Panel CLAA320WB02 (P)), PHILIPS 37PF3321/12 (Panel LC370WX1 (SL)(04)).
PSU Advanced
Model 32PF3321 / 12 uses the PLCD190P1 power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, this is a boost converter based on the L6562D PWM controller, which eliminates the charge current of the rectifier filter's electrolytic capacitor 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 PHILIPS 32PF3321 device:
Installed matrix (LCD panel) CLAA320WB02 (P).
To power the backlight, an inverter PH-BLC164 is used, it is controlled by the OZ964SN PWM controller. A transformer TMP D6801 is installed in the inverter converter.
The necessary supply voltages for all nodes of the PHILIPS 32PF3321 TV are generated by the PLCD190P1 power module or its analogs using TEA1533AT (SOP14), L6562D (PFC), TEA1601T (SOP16) microcircuits.
MainBoard - the main board (motherboard) is a module 3139-123-6117.2, using TDA9974, GM1501-LF chips and others.
The UL1318S / AI H-3 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CPT
Model: CLAA320WB02
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: MVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit), CIE1931 75%
Response Time: 10/6 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V