Technical description and composition of the PHILIPS 37PFL9604H TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 37PFL9604H / 60
Chassis / Version: Q549.2E LA
Panel: T370HW02 V9
Inverter (backlight): integrated into PSU
PWM Inverter: DDA003A (24pin), DDA002B
Power Supply (PSU): DPS-298CP
PWM Power: DDA002B (PWM 20 pin), 1606B (PFC), 3BS3LJ (PWM 8pin)
MainBoard: 310432862361 3104.303.52401 - 3104.313.63571
IC MainBoard: PNX85439EH, M25P05, M24C64, DRX3926K, TPA6111A2
Tuner: HD1816AF / BHXP
Specifications 37PFL9604H
PHILIPS 37PFL9604H
General recommendations for repairing TV LCD
Repair of the PHILIPS 37PFL9604H / 60 TV should begin with a careful external inspection of all its components and modules. Also subject to inspection are body elements, functional control buttons, screen, cords and connectors. Often, by visible changes, it is possible to determine the further direction of troubleshooting and localization of the defect before the start of the acquisition of oscillograms and the necessary measurements. 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.
Power Module Repair
Malfunctions of the DPS-298CP power module can be expressed in different ways, for example, PHILIPS 37PFL9604H / 60 does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of operability. 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 or power key.
The reasons for the breakdown of the power switch of the flyback converter of the power module can be different, for example, a malfunction of semiconductor elements or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip or breakage of the resistors in its bundle.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
Inverter Repair
In cases where the PHILIPS 37PFL9604H / 60 TV has lost an image, and the sound is there and all the other functions are operational, there is a possibility of a malfunction of the inverter (converter for powering the backlight). When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power.
Repair of the inverter can often be somewhat complicated by the use of special protection circuits, which are designed to disconnect it in emergency cases for fire safety when the lamps are depressurized, or short circuits or breaks in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits in order to be able to make the necessary measurements at the control points of the circuit.
It should be remembered that in such cases there is a risk of failure of the power elements of the inverter and to take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
Repair Main Board
In cases of attempts to repair the motherboard, it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). 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 main elements and replace failed chips with new ones.
It should be remembered! Attempts to repair the PHILIPS 37PFL9604H / 60 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-serviceability of the device!
Service manual and schematic diagram 37PFL9604H/60 Chassis Q549.2E LA
PSU ---------------> DPS-298CP-2 DELTA schematic diagram
The appearance of MainBoard 310432862361 is shown in the figure below:310432862361
PSU Advanced
The DPS-298CP 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 a 1606B PWM controller that evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage evenly 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 37PFL9604H device:
Installed matrix (LCD panel) T370HW02 V9.
To power the backlight, a converter is used, combined with a power supply, controlled by a PWM controller DDA003A (24pin), DDA002B.
The necessary supply voltages for all nodes of the PHILIPS 37PFL9604H TV are generated by the DPS-298CP power supply module or its analogs using DDA002B (PWM 20 pin), 1606B (PFC), 3BS3LJ (PWM 8pin) microcircuits.
MainBoard - the main board (motherboard) is a module 310432862361, using chips PNX85439EH, M25P05, M24C64, DRX3926K, TPA6111A2 and others.
The HD1816AF / BHXP tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T370HW02 V9
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 819.36x460.89 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 2500: 1
Display Colors: 1.07B (10-bit), CIE1931 72%
Response Time: 5.5 (Typ.) (G to G)
Frequency: 120Hz
Lamp Type: 20 pcs CCFL Without Driver
Signal Interface: LVDS (4 ch, 10-bit), 92 pins
Voltage: 12.0V
