Technical description and composition of the PHILIPS 40PFH6550 TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 40PFH6550 / 88
Chassis / Version: QM15.2E LA
Panel: TPT400LA-HF07.S Code 217
LED driver (backlight): integrated into PSU
PWM LED driver: SSC9522S
MOSFET LED driver: TK10A50D
Power Supply (PSU): 715G6677
PWM Power: LD7591T, LD5532, SP6018ES8RGB, AOZ3015AI
MOSFET Power: TK18A60V, TK11A65D
MainBoard: 715G7030-M0G-000-005K
IC MainBoard: MT5593FPIJ, THGBMBG6D1KBAIL, H5TQ2G63FFR-RDC, TAS5760LD
Tuner: TDSY-G480D
Specifications 40PFH6550
PHILIPS 40PFH6550
General repair guidelines for TV LCD LED
Possible malfunctions
- The PHILIPS 40PFH6550 TV does not turn on and does not show any signs of turning on, it does not respond to the control buttons or to the remote control.
With similar manifestations, in some cases, the 715G6677 power module is faulty. It is necessary to measure its output supply voltage, and in case of their absence, check the serviceability of power switches (TK18A60V, TK11A65D) of converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode, or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers LD7591T, LD5532, SP6018ES8RGB, AOZ3015AI, in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new, or obviously working.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
In such cases, the most likely malfunction of the LED backlight. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the 715G7030-M0G-000-005K motherboard should begin by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Verification or replacement of elements MT5593FPIJ, THGBMBG6D1KBAIL, H5TQ2G63FFR-RDC, TAS5760LD requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
Before replacing the TDSY-G480D tuner, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
It should be remembered! Attempts to independently repair the PHILIPS 40PFH6550 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-repairability of the device!
Service manual and schematic diagram ------------> PHILIPS 40PFH6550 Chassis QM15.2E LA.
The appearance of the MainBoard 715G7030-M0G-000-005K is shown in the figure below:715G7030-M0G-000-005K
Main features of the PHILIPS 40PFH6550 device:
Installed matrix (LED panel) TPT400LA-HF07.S Code 217.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the SSC9522S PWM controller. As the power elements of the LED driver, keys of the TK10A50D type are used.
The necessary supply voltages for all nodes of the PHILIPS 40PFH6550 TV are generated by the 715G6677 power supply module or its analogs using LD7591T, LD5532, SP6018ES8RGB, AOZ3015AI microchips and TK18A60V, TK11A65D type power switches.
MainBoard - the main board (motherboard) is a module 715G7030-M0G-000-005K, using the chips MT5593FPIJ, THGBMBG6D1KBAIL, H5TQ2G63FFR-RDC, TAS5760LD and others.
The TDSY-G480D tuner allows you to receive television programs and tune to channels.
