Technical description and composition of the PHILIPS 32PFL3178T TV, panel type and applicable modules. The composition of the modules.PHILIPS LED
Model: 32PFL3178T / 60
Chassis / Version: TPN10.1E LA
Panel: TPT315B5-DXJSFE
T-CON: 6870C-0442B
LED driver (backlight): integrated into MainBoard
PWM LED driver: PF7903BS
MOSFET LED driver: AOD2610
Power Supply (PSU): integrated into MainBoard
PWM Power: LD7752B, SP6018S8RGB
MOSFET Power: AOB298L, TK13A65U
MainBoard: 715G6079-C0D-000-004K
IC MainBoard: NT72567BG-BA NAND FLASH: K9F1G08U0D, RT7234GSP, SY8009BABC, HC405
Tuner: ST03CS-2-E
Specifications 32PFL3178T
PHILIPS 32PFL3178T
General repair guidelines for TV LCD LED
Possible malfunctions
- The PHILIPS 32PFL3178T TV does not turn on and does not show any signs of turning on, it does not respond to the control buttons or the remote control.
First of all, in such cases, you should verify the operability of the common switching power supply (IIP) - AC / DC voltage converter of the mains voltage. All source elements in this TV model are located on the MainBoard 715G6079-C0D-000-004K main board. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (AOB298L, TK13A65U) and rectifier diodes in the converters for a short circuit.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) LD7752B, SP6018S8RGB, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
In some of these cases, the malfunction is caused by the lack of a backlight display. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, you can sometimes detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the motherboard 715G6079-C0D-000-004K should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - NT72567BG-BA NAND FLASH: K9F1G08U0D, RT7234GSP, SY8009BABC, HC405. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
The malfunction of the ST03CS-2-E tuner is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
Service manual and schematic diagram ---------> PHILIPS 32PFL3178T Chassis TPN10.1E LA
FOR MODELS 20PFL3108H/12, 22PFL3108H/60, 24PFL3108H/12, 24PFL3108H/60, 32PFL3088H/12, 32PFL3148H/12, 32PFL3168H/12, 32PFL3168T/60, 32PFL3178T/60, 32PFL3188H/12, 32PFL3188K/12, 32PFL3188T/60, 39PFL3088H/12, 39PFL3188H/12, 39PFL4398H/12, 39PFL4398T/60, 40PFL3088H/12, 40PFL3138H/12, 40PFL3148H/12, 40PFL3188H/12, 40PFL3188T/60, 40PFL3198T/60, 42PFL3188H/12, 42PFL4398H/12, 42PFL4398T/60, 47PFL3188H/12, 47PFL3188T/60, 47PFL3198H/12, 47PFL3198T/60, 47PFL4398H/12, 47PFL4398T/60.
The appearance of the MainBoard 715G6079-C0D-000-004K is shown in the figure below:715G6079-C0D-000-004K
715G6079-C0D-000-004K can be used in TVs:
PHILIPS 32PFL3188T/60 (Panel TPT315B5-EUJFFA REV:S1D code 007 p/n: 996590007793), PHILIPS 39PFL4398T/60 (Panel TPT390J1-HVD03 code 014 or 008 p/n: 996590007997), PHILIPS 32PFL3168T/60 (Panel LC320DXE (SF)(R1)).
Main features of the PHILIPS 32PFL3178T device:
Installed matrix (LED panel) TPT315B5-DXJSFE.
The matrix control uses the Timing Controller (T-CON) 6870C-0442B.
To power the backlight LEDs, a converter is used, combined with the main board 715G6079-C0D-000-004K, controlled by the PF7903BS PWM controller. As power elements of the LED driver, keys of the AOD2610 type are used.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using LD7752B, SP6018S8RGB microchips and power switches of the AOB298L, TK13A65U type.
MainBoard - the main board (motherboard) is a 715G6079-C0D-000-004K module using NT72567BG-BA NAND FLASH chips: K9F1G08U0D, RT7234GSP, SY8009BABC, HC405 and others.
The ST03CS-2-E tuner provides television reception and channel tuning.