Technical description and composition of the PHILIPS 37PFL3312 TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 37PFL3312 / 10
Chassis / Version: LC7.1E LA
Panel: LC370WX1-SLB1 // LC370WX4-SLB1 code 071
T-CON: 3139 268 05959 SSB ANA LCD EU LC07
Inverter (backlight): 2 boards
Power Supply (PSU): PLCD300P3 (24573)
PWM Power: TEA1601T (16), TEA1533AT (14), L6562D (PFC)
MOSFET Power: 2SK4075, F11NM60N, P4NK60ZFP, P6NK60ZFP
MainBoard: 3139_123_62611
IC MainBoard: CPU: M30300SAGP; DRAM: EDS1216AGTA; NAND Flash: M29W320ET70N; EEPROM: M24C64; SOUND: TDA8932T
Tuner: UV1318S / A
Specifications 37PFL3312
PHILIPS 37PFL3312
General recommendations for repairing TV LCD
Any repair of electronic equipment usually begins with a careful external inspection of the device and troubleshooting. In this case, you should inspect all the elements of the PHILIPS 37PFL3312 / 10 TV, both internal and external. Many visible changes make it possible to determine the future direction of troubleshooting and localization of the defect. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
Power Module Repair
In the case when the 37PFL3312 / 10 does not turn on, does not respond to the remote control and the front panel buttons, does not blink bulbs and does not show any signs of operability, most likely in this case the PLCD 300P3 power module is faulty (24573). It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first the power semiconductor elements - rectifier diodes and the power switch of the F11NM60N P4NK60ZFP P6NK60ZFP converter, which are often found in a breakdown state in such situations.
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 TEA1601T (16), TEA1533AT (14), L6562D (8) from the manufacturer.
If the power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
Inverter Repair
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but there is sound and other functions work, there is a high probability of a malfunction of the inverter (power converter for the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter feeding the inverter should be checked.
In most cases, the diagnosis and repair of the inverter 2 of the board is difficult due to the organization of protection, which turns it off in emergency cases to avoid fires during short circuits or breaks in high-voltage circuits and when the lamps are depressurized. Often, repairmen block the protection circuits in order to make the necessary measurements at the inverter control points to identify the causes of the defect.
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 37PFL3312 / 10 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-serviceability of the device.
Service manual and schematic diagram 37PFL3312S/60 Chassis LC7.1E LA
FOR MODELS:
26PFL3312/10, 26PFL3312S/60, 26PFL5322/10, 26PFL5322/12, 26PFL5322S/60, 26PFL7332S/60, 32PFL3312/10, 32PFL3312S/60, 32PFL5322/10, 32PFL5322/12, 37PFL3312/10,37PFL3312S/60, 37PFL5322/10, 37PFL5322/12, 37PFL5322S/60, 42PFL3312/10, 42PFL3312S/60, 42PFL5322/10, 42PFL5322/12, 42PFL5322S/60.
PSU SCHEMATIC MANUAL -----------------------> PLCD300P3
3139_123_62611
3139_123_62611 can be used in TVs:
PHILIPS 26HF5445/10 (Panel V260B1-L03 code 068 p/n: 932224937682), PHILIPS 26PFL5322S/60 (Panel V260B1-L03 Rev.C3), PHILIPS 26PFL7332S/60 (Panel V260B1-L03 Rev.C3), PHILIPS 32PFL3312S/80 (Panel V315B1-L05 REV.C1), PHILIPS 32PFL5322S/60 (Panel LK315T3LZ93Q), PHILIPS 32PFL5322S/60 (Panel T315XW02 V.D), PHILIPS 32PFL5332S/60 (Panel T315XW02), PHILIPS 37PFL3312/10 (Panel LC370WX1-SLB1), PHILIPS 37PFL3312S/60 (Panel LC370WX4-SLB1), PHILIPS 37PFL3312S/60 (Panel LC370WX5 (SL)(B1)), PHILIPS 37PFL5322S/60 (Panel LC370WX4-SLB1), PHILIPS 37PFL5322S/60 (Panel LC370WX4-SLB1 T704A REV-0.8), PHILIPS 37PFL7662D/12 (Panel T370HW02 V.1), PHILIPS 42PFL3312S/60 (Panel LC420WX8 (SL)(B1)), PHILIPS 42PFL5322S/60 (Panel LC420WX7 SLB1 T703C), PHILIPS 42PFL7662D/12 (Panel LC420WU5 code 093), PHILIPS 42PFL7682D/12 (Panel LC420WU5), PHILIPS 47PFL5522D/12 (Panel LC470WX1-SLA2 code 109 p/n: 932225331682 (LGPH) B ).
PSU Advanced
The PLCD300P3 power supply module is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC assembly is a Step-Up Converter based on the L6562D PWM controller, which evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the PHILIPS 37PFL3312 device:
Installed matrix (LCD panel) LC370WX1-SLB1 or LC370WX4-SLB1 code 071.
The matrix control uses the Timing Controller (T-CON) 3139.
Inverter 2 is used to power the backlight.
The necessary supply voltages for all nodes of the PHILIPS 37PFL3312 TV are generated by the PLCD300P3 power module or its analogs using TEA1601T (16), TEA1533AT (14), L6562D (PFC) microcircuits and power switches of the type 2SK4075, F11NM60N, P4NK60ZFP, P6NK60ZFP, P6NK60ZFP.
MainBoard - the main board (motherboard) is a module 3139_123_62611, using CPU chips: M30300SAGP; DRAM: EDS1216AGTA; NAND Flash: M29W320ET70N; EEPROM: M24C64; SOUND: TDA8932T and others.
The UV1318S / A tuner allows you to receive television programs and tune to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC370WX1-SLB1
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 819.6x460.8 mm
Surface: Antiglare (Haze 13%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit)
Response Time: 6/6 (Tr / Td); 6 (G to G)
Frequency: 60Hz
Lamp Type: 20 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V