Technical description and composition of the PHILIPS 32PFL3507T TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 32PFL3507T / 60
Chassis / Version: TPM9.2E LA
Panel: LC320EXE (SD) (A1)
LED backlight: 3660L-0386A
T-CON: 6870C-0370A
LED driver (backlight): integrated into PSU
PWM LED driver: PF7900S
MOSFET LED driver: AOD4126
Power Supply (PSU): 715G5194-P01-W20-002S
PWM Power: A6069H (Stb), LD7523GS
MOSFET Power: TK6A65D
MainBoard: 715G5155-M01-002-005X
IC MainBoard: MT5366ZVGG, H5TQ1G63DFR-H9C, TMDS361BPAGR
Tuner: ENV57U04D8
Specifications 32PFL3507T
PHILIPS 32PFL3507T
General repair guidelines for TV LCD LED
Possible malfunctions
- The PHILIPS 32PFL3507T TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
With similar manifestations, in some cases, the 715G5194-P01-W20-002S power module is faulty. It is necessary to measure its output voltages, and if they are absent (full or partial), you should check the operability of the power switches (TK6A65D) of the converters and rectifier diodes for a possible short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microchips A6069H (Stb), LD7523GS are usually checked by replacing with new, or obviously working.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
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.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The 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. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, 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 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 715G5155-M01-002-005X 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). 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 elements - MT5366ZVGG, H5TQ1G63DFR-H9C, TMDS361BPAGR and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner ENV57U04D8. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Attention TV owners! Attempts at self-repair of PHILIPS 32PFL3507T are not recommended by the manufacturer and can lead to serious negative consequences!
Service manual and schematic diagram -----------------> PHILIPS 32PFL3507T Chassis TPM9.2E LA
The appearance of the MainBoard 715G5155-M01-002-005X is shown in the figure below:715G5155-M01-002-005X
715G5155-M01-002-005X can be used in TVs:
PHILIPS 22PFL3507T/60 (Panel M215HW03 V.1 code 174 p/n: 996590001935 code 160 932228935682), PHILIPS 24PFL3507T/60 (Panel M236HGE-L20 code 161 p/n: 996590000202), PHILIPS 32PFL3517/60 (Panel LC320EUE (SE)(M1) code 156 p/n: 932228889682), PHILIPS 37PFL3507T/60 (Panel LC370EUE (SE)(M1)), PHILIPS 42PFL3007H/60 (Panel LC420WUE (SC)(A1) code 152 p/n: 932228942682), PHILIPS 32PFL3517H/60 (Panel LC320EUE (SE)(M1)).
The appearance of the power supply
Main features of the PHILIPS 32PFL3507T device:
Installed matrix (LED-panel) LC320EXE (SD) (A1).
The matrix control uses the Timing Controller (T-CON) 6870C-0370A.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the PF7900S PWM controller. As power elements of the LED driver, keys of the AOD4126 type are used.
The necessary supply voltages for all nodes of the PHILIPS 32PFL3507T TV are generated by the 715G5194-P01-W20-002S power module or its analogs using A6069H (Stb), LD7523GS microcircuits and TK6A65D type power switches.
MainBoard - the main board (motherboard) is a module 715G5155-M01-002-005X, using chips MT5366ZVGG, H5TQ1G63DFR-H9C, TMDS361BPAGR and others.
The tuner ENV57U04D8 provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320EXE-SDA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Display Colors: 16.7M (6-bit + Hi-FRC)
Lamp Type: WLED