Technical description and composition of the PHILIPS 32PFT5500 TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 32PFT5500 / 12
Chassis / Version: QM15.2E LA
Panel: TPT315B5
LED driver (backlight): integrated into PSU
PWM LED driver: PF7708AS
MOSFET LED driver: CYS9240
Power Supply (PSU): 715G6934-P01-003-002H TVP
PWM Power: PF6003AHS, AOZ3015AI
MOSFET Power: TK8A65D
MainBoard: 715G7030-M0G-000-005N (WK1504)
IC MainBoard: MT5593FPIJ, THGBMBG6D1KBAIL, K4B4G1646D-BCMA
Tuner: TDSY-G480D Si2166-B22-GM
Specifications 32PFT5500
PHILIPS 32PFT5500
General repair guidelines for TV LCD LED
Possible manifestations of defects
- PHILIPS 32PFT5500 does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
With such manifestations, the 715G6934-P01-003-002H power module usually fails. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches (TK8A65D) and rectifier diodes for a possible partial or complete breakdown.
In the event of a breakdown in the secondary circuits of the converter, it can usually fail in short circuit mode, and in case of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most 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. PFM-PF6003AHS, AOZ3015AI controllers, 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, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
As a rule, in such cases there is no display backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. 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 TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the 715G7030-M0G-000-005N motherboard should be started by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - MT5593FPIJ, THGBMBG6D1KBAIL, K4B4G1646D-BCMA with new or obviously good ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
Before replacing the TDSY-G480D Si2166-B22-GM 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 I2C
Attention to users! Self-repair of a PHILIPS 32PFT5500 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
Service manual and schematic diagram PHILIPS 32PFT5500 Chassis QM15.2E LA
The appearance of the MainBoard 715G7030-M0G-000-005N is shown in the figure below:715G7030-M0G-000-005N
Main features of the PHILIPS 32PFT5500 device:
Installed matrix (LED panel) TPT315B5.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the PF7708AS PWM controller. As power elements of the LED driver, keys of the type CYS9240 are used.
The necessary supply voltages for all nodes of the PHILIPS 32PFT5500 TV are generated by the 715G6934-P01-003-002H power module or its analogs using PF6003AHS, AOZ3015AI microcircuits and TK8A65D type power switches.
MainBoard - the main board (motherboard) is a module 715G7030-M0G-000-005N, using chips MT5593FPIJ, THGBMBG6D1KBAIL, K4B4G1646D-BCMA and others.
The TDSY-G480D Si2166-B22-GM tuner provides TV reception and channel tuning.