Technical description and composition of the PHILIPS 37PFL9603D TV, panel type and applicable modules. The composition of the modules.PHILIPS
Model: 37PFL9603D / 10
Chassis / Version: Q529.1E LA
Panel: LC370WUF SAB1 (LGPH) code 141
Inverter (backlight): integrated into PSU
Power Supply (PSU): 310432852763 PSU - 3104 303 50815B - 3104 313 61935B
PWM Power: UBA2071AS, 1606B (PFC)
MainBoard: 3104.303.51026 - 3104.313.62146
IC MainBoard: PNX8541E / 2414, STI7101BWC, EDD2516AETA, M29W640FT70N6, ISP1564HL
Tuner: TD1716F / BHXP
Specifications 37PFL9603D
PHILIPS 37PFL9603D
General recommendations for repairing TV LCD
It is recommended that you start troubleshooting diagnostics for the PHILIPS 37PFL9603D / 10 TV, as well as all other electronic devices, with an external inspection of both external and internal elements and modules. Often, according to the external signs and the nature of some damage to the elements, it is possible to draw preliminary conclusions and determine a further algorithm for troubleshooting and localizing the malfunction before carrying out the necessary measurements and taking oscillograms at control points. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
Power Module Repair
Sometimes the PHILIPS 37PFL9603D / 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 power semiconductor elements of the converter and the rectifier diode bridge of the network, as well as the large electrolytic capacitor of the filter of the network rectifier and the key transistor.
As a rule, the keys of flyback converters, which use an N-Fet field effect transistor on a separate radiator, or integrated with a PWM controller in a single chip, are reliable enough and rarely fail for no reason. The reasons for the breakdown of the key should be sought by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
When using the Active Power Factor Correction (CMC) circuitry in the power module, the search for faulty elements is somewhat more complicated.
Inverter Repair
Sometimes the PHILIPS 37PFL9603D / 10 TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the backlight converter, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all the electrolytic capacitors of the filter by supplying the inverter itself, including the power supply unit (power supply unit).
Repairing the inverter 3104 328 56911 D824JU is difficult because in case of any malfunction or abnormal situation, even if the lamps are unevenly worn, protection is triggered, which turns it off for fire safety purposes. Diagnostics become impossible and protection needs to be disabled.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
Owners and users of the PHILIPS 37PFL9603D / 10 TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
Service manual and schematic diagram 37PFL9603D/10 Chassis Q529.1E LA
The appearance of MainBoard 3104.303.51026 is shown in the figure below:3104.303.51026
3104.303.51026 can be used in TVs:
PHILIPS 32PFL7623D/10 (Panel LC320WXN-SAB1 code 136), PHILIPS 32PFL9603D/10 (Panel LK315D3LZ43), PHILIPS 32PFL9613 (Panel 32 ), PHILIPS 37PFL9603D/10 (Panel LC370WUF-SAB1 p/n: 932226169682), PHILIPS 37PFL9603D/10 (Panel LC370WUF SAB1 (LGPH) code 141), PHILIPS 42PFL7403S/60 (Panel p/n: 932225845000), PHILIPS 42PFL7623D/10 (Panel LC420WUE - SAA1), PHILIPS 42PFL9703D/10 (Panel LC420WUF-SAC1), PHILIPS 42PFL9703D/10 (Panel LC420WUF-SAC1 code 143), PHILIPS 42PFL9803H/10 (Panel T420HW02 V.1 code 149 p/n: 932226404682 ).
PSU Advanced
The 37PFL9603D / 10 model uses a 310432852763 power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, it is a step-up converter based on the 1606B PWM controller, which eliminates the charge current of the electrolytic capacitor of the rectifier filter 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
Key Features of PHILIPS 37PFL9603D:
Installed matrix (LCD panel) LC370WUF SAB1 (LGPH) code 141.
To power the backlight, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the PHILIPS 37PFL9603D TV are generated by the power supply module 310432852763, or its analogs using UBA2071AS, 1606B (PFC) microcircuits.
MainBoard - the main board (motherboard) is a module 3104.303.51026, using chips PNX8541E / 2414, STI7101BWC, EDD2516AETA, M29W640FT70N6, ISP1564HL and others.
The TD1716F / BHXP tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC370WUF-SAB1
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 819.36x460.89 mm
Surface: Antiglare (Haze 13%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1300: 1
Display Colors: 1.07B (10-bit)
Response Time: 8 (MPRT)
Frequency: 120Hz
Lamp Type: 16 pcs EEFL Without Driver
Signal Interface: LVDS (4 ch, 10-bit), 92 pins
Voltage: 12.0V