Technical description and composition of the PHILIPS 42PFL7862D TV, type of panel and applicable modules. The composition of the modules.
PHILIPS
Model: 42PFL7862D / 10
Chassis / Version: Q528.1E LA
Panel: LC420WU5 (SL) (B1) code 097
T-CON: 6870C-0182A TL22970, TPS65162, BUF22821, M12L64322A
Inverter (backlight): LC420WU5 (MASTER) (SLAVE) 6632L-0470A (MASTER), 6632L-0471A (SLAVE)
PWM Inverter: BD9897FS (32 pin)
MOSFET Inverter: K4075
Trans Inverter: BET-2544-F42L
Power Supply (PSU): 310432848892 3104 328 48892 // 3104 303 50594
PWM Power: MC34067P (PWM DIP-16), MC34063
MOSFET Power: 10N60
MainBoard: 3104.313.61943 - 3104.303.50823 310431361882A
IC MainBoard: PNX8541E / 0434, PNX5050EH / M1, ISP1564HL, AD8191
Tuner: TD1716F / 1HXP-3
Control: RC4350 / 01B 3139 256 13271
Specifications 42PFL7862
PHILIPS 42PFL7862D
General recommendations for repairing TV LCD
It is advisable to start any repair and diagnostics of the electronic device, in particular PHILIPS with the Q528.1E LA chassis, with a careful external examination of the internal and external elements. 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. In most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
If the PSU 42 LCD 2K7 3104 303 50594 power supply module fails, the external manifestations may be different, for example, PHILIPS 42PFL7862D does not turn on at all and there is no indication of the indicator lights on the front panel. With the same symptoms, the stabilizer (converter) of the power supply to the control processor may be faulty. When diagnosing and repairing the power supply, first of all, replace the swollen capacitors of the filter of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes and 10N60 transistors in the primary circuit.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself for no reason that should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller MC34067P (16n), which can be checked only by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If the PHILIPS 42PFL7862D 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. All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
In cases of attempts to repair the motherboard 310431361882A, it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). BGA chips can in most cases be diagnosed by local heating. Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - PNX8541E / 0434, PNX5050EH / M1, ISP1564HL, AD8191, Tuner TD1716F / 1HXP-3 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
Attention to users! Self-repair of a PHILIPS 42PFL7862D TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual and schematic diagram 42PFL7862D/10 Chassis Q528.1E LA
The appearance of MainBoard 3104.313.61943 is shown in the figure below:3104.313.61943 - 3104.303.50823
3104.313.61943
3104.313.61943 can be used on TVs:
PHILIPS 32PFL7862D/10 (Panel T315XW02 V.F), PHILIPS 32PFL9632D/10 (Panel LC320WX5-SLB1), PHILIPS 37PFL9732D/10 (Panel LC370WU3 (SL)(E1)), PHILIPS 42PFL7862D/10 (Panel LC420WU5(SL)(B1) code 097), PHILIPS 42PFL9632D/10 (Panel LC420WU5(SL)(B1)), PHILIPS 42PFL9732D/10 (Panel LC420WU5 (SL)(B1)), PHILIPS 47PFL9732D/10 (Panel LC470WU2 (SL)(B1) code 101).
The appearance of the power supply
Main features of the PHILIPS 42PFL7862D device:
Installed matrix (LCD panel) LC420WU5 (SL) (B1) code 097.
The matrix control uses the Timing Controller (T-CON) 6870C-0182A.
An LC420WU5 inverter is used to power the backlight, controlled by a BD9897FS PWM controller (32 pin). A transformer BET-2544-F42L is installed in the inverter converter. As power elements of the inverter, keys of the K4075 type are used.
The necessary supply voltages for all nodes of the PHILIPS 42PFL7862D TV are generated by the power supply module 310432848892 or its analogs using microcircuits MC34067P (PWM DIP-16), MC34063 and power switches of the type 10N60.
MainBoard - the main board (motherboard) is a module 3104.313.61943, using chips PNX8541E / 0434, PNX5050EH / M1, ISP1564HL, AD8191 and others.
The tuner TD1716F / 1HXP-3 provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC420WU5-SLB1
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 930.24x523.26 mm
Surface: Antiglare (Haze 13%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 1.06B (8-bit + Dithering)
Response Time: 5 (G to G); 8 (MPRT)
Frequency: 120Hz
Lamp Type: EEFL Embedded (Inverter)
Signal Interface: LVDS (4 ch, 10-bit), 92 pins
Voltage: 12.0V
