Technical description and composition of the PHILIPS 42PDL6907T TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 42PDL6907T / 12
Chassis / Version: QFU2.1E LA
Panel: LC420EUF DEP1 code 425
LED driver (backlight): DPS-119CP A 272217190582
PWM LED driver: DDA009DWR
Power Supply (PSU): DPS-119CP A 272217190582
PWM Power: DDA010 (Standby), NCP1608B (PFC), ICE2QS02G
MainBoard: YU 239.1 AI1.A SSB 310432868343
Control: 2422 549 90507
Specifications 42PDL6907T
PHILIPS 42PDL6907T
General repair guidelines for TV LCD LED
Repair of the PHILIPS 42PDL6907T12 TV should begin with a careful external examination of all its constituent elements and modules. In some cases, visible external damage to the elements can suggest the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of the nodes of electronic circuits. 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.
In cases when the PHILIPS 42PDL6907T12 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability at all, the DPS-119CP A 272217190582 power supply module is most likely to be faulty or there is no power to the processor on the motherboard (a typical defect of some PHILIPS TV models). 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 of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
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 without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller, which can only be checked replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If PHILIPS 42PDL6907T12 does not have an image but has sound, the backlight LEDs of the LC420EUF DEP1 code 425 or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
A malfunction in the backlight circuits often occurs due to an open in the power circuit of the LED lines. It is necessary to disassemble the panel and check the LEDs themselves, the soldering of their conclusions, as well as the reliability of the connections in the connectors and the soldering of the conclusions of the connectors.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes.
The motherboard YU 239.1 AI1.A SSB 310432868343 must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up constantly. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
Attention! For users and owners of 42PDL6907T12 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 42PDL6907T12 Chassis QFU2.1E LA
Chassis QFU2.1E LA USED IN MODELS:
32PFL6007H/12, 32PFL6007K/12, 32PFL6007T/12, 32PFL6087H/12, 32PFL6087K/12, 32PFL6087T/12
37PFL6007H/60, 37PFL6007H/12, 37PFL6007K/12, 37PFL6007T/12, 37PFL6777H/12, 37PFL6777K/12
42PDL6907H/12, 42PDL6907K/12, 42PDL6907T/12, 42PFL6007H/12/60, 42PFL6007K/12, 42PFL6007T/12/60, 42PFL6057H/12/60, 42PFL6057K/12, 42PFL6057T/12/60, 42PFL6067H/12/60, 42PFL6067K/12, 42PFL6067T/12/60, 42PFL6097H/12/60, 42PFL6097K/12, 42PFL6097T/12/60, 42PFL6687H/12/60, 42PFL6687K/12, 42PFL6687T/60, 42PFL6877H/12/60, 42PFL6877K/12, 42PFL6877T/12/60
47PDL6907H/12, 47PDL6907K/12, 47PDL6907T/12, 47PFL6007H/12/60, 47PFL6007K/12, 47PFL6007T/12/60, 47PFL6057H/12/60, 47PFL6057K/12, 47PFL6057T/12/60, 47PFL6067H/12/60, 47PFL6067K/12, 47PFL6067T/12/60, 47PFL6097H/12/60, 47PFL6097K/12, 47PFL6097T/12/60, 47PFL6687H/12/60, 47PFL6687K/12, 47PFL6687T/60, 47PFL6877H/12/60, 47PFL6877K/12, 47PFL6877T/12/60
55PFL6007H/12, 55PFL6007K/12, 55PFL6007T/12, 55PFL6097H/12, 55PFL6097K/12, 55PFL6097T/12
The appearance of MainBoard 3104.303.52401 is shown in the figure below:3104.303.52401
3104.303.52401 can be used in TVs:
PHILIPS 37PFL9604H/60 (Panel T370HW02 V9), PHILIPS 40PFL9704H/60 (Panel LK400D3LA33), PHILIPS 40PFL9904/12 (Panel LK400D3LA43 (SRPJ) B p/n: 932227424682), PHILIPS 46PFL9704H/60 (Panel LK460D3LA43 code 195), PHILIPS 52PFL9704H/12 (Panel LK520D3LA73 (SRPJ) code 230).
PSU Advanced
The DPS-119CP 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 NCP1608B 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 42PDL6907T device:
Installed matrix (LED-panel) LC420EUF DEP1 code 425.
The LED driver DPS-119CP is used to power the backlight LEDs, it is controlled by the DDA009DWR PWM controller.
The necessary supply voltages for all nodes of the PHILIPS 42PDL6907T TV are generated by the DPS-119CP power supply module, or its analogs using DDA010 (Standby), NCP1608B (PFC), ICE2QS02G microcircuits.
MainBoard - the main board (motherboard) is a YU module.