Friday 24 January 2020

REPAIR / SERVICING TV PHILIPS 32PFL5206H

Technical description and composition of the PHILIPS 32PFL5206H TV, type of panel and applicable modules. The composition of the modules.
PHILIPS LED
Model: 32PFL5206H / 60
Chassis / Version: TPM8.2E LA
Panel: T315XW06 V.3 code 139 p / n: 996510048496
LED backlight: 73.31T14.004-5-SK1, 31T15-03g
T-CON: T315XW02 TEST BD
LED driver (backlight): T315HW07 V8 31T14-D04
PWM LED driver: MAX16814, RM5103
MOSFET LED driver: T8N20GS, P3506DD, P1825AS
Trans LED driver: 80GL32P-81-H HI-POT OK, EAC013885101M02
Power Supply (PSU): 715G4697-P01-002-003U 9965 100 48498 ADTVB2407SA3
PWM Power: A6069H (7), LD7523GS (8),
MOSFET Power: K4013
MainBoard: 715G4796-M1B-000-004X (WK1112)
IC MainBoard: TA55717,
Tuner: TDTK-G731D 9965 100 48497
Control: 098GR7BDENTPHT 2422 549 90301, IR: 715G5217-R01-000-004X
Specifications 32PFL5206H
PHILIPS 32PFL5206H
General repair guidelines for TV LCD LED
Possible manifestations of defects
- PHILIPS 32PFL5206H 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.
Most likely in this case, the main switching power supply (MPS) 715G4697-P01-002-003U is faulty. It is then necessary to measure its output voltages and, if they are absent, you should check the power switches (K4013) and the rectifier diodes of the converters for a short circuit probability.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the 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 chips A6069H (7), LD7523GS (8), are usually checked by replacing with new, or obviously working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
In such cases, the most likely malfunction of the LED backlight elements. 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 for them. 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 turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 715G4796-M1B-000-004X motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its TA55717 chips, and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the TDTK-G731D 9965 100 48497 tuner may be malfunctioning. In such cases, you should first ensure that there are supply voltages at its respective terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Attention TV owners! Attempts at self-repair of PHILIPS 32PFL5206H are not recommended by the manufacturer and can lead to serious negative consequences!


Service manual and schematic diagram 32PFL5206H/60 Chassis TPM8.2E LA

 19HFL3233D, 19PFL3606H, 22PFL3606H, 26PFL3606H.

 To reduce the backlight current in LED drivers with a PWM controller MAX16814 (TSSOP20 MAX16814B), it is necessary to proportionally increase the total resistance of the resistors from terminal 10 (SETI) to the housing. The maximum current in each of the four channels (in milliamps) for the resistance  (in kilo-ohms) is determined from the ratio 1500/r



 The appearance of the MainBoard 715G4796-M1B-000-004X is shown in the figure below:
715G4796-M1B-000-004X
715G4796-M1B-000-004X can be used in TVs:
PHILIPS 19PFL3606H/60 (Panel LM185WH1-TLG1 code 131 p/n: 932228373682 ), PHILIPS 22PFL3606H/60 (Panel LM215WF1-TLF1 p/n: 932228374682), PHILIPS 32PFL5206H/60 (Panel T315XW06 V.3 code 139 p/n: 996510048496).
The appearance of the power supply
Main features of the PHILIPS 32PFL5206H device:
Installed matrix (LED-panel) T315XW06 V.3 code 139 p / n: 996510048496.
The matrix control uses the Timing Controller (T-CON) T315XW02.
The LED driver T315HW07 is used to power the backlight LEDs, it is controlled by the PWM controller MAX16814, RM5103. The transformer 80GL32P-81-H HI-POT OK, EAC013885101M02 is installed in the LED driver converter. As the power elements of the LED driver, keys of the type T8N20GS, P3506DD, P1825AS are used.
The necessary supply voltages for all nodes of the PHILIPS 32PFL5206H TV are generated by the power module 715G4697-P01-002-003U, or its analogs using microchips A6069H (7), LD7523GS (8), and power switches of the type K4013.
MainBoard - the main board (motherboard) is a 715G4796-M1B-000-004X module, using TA55717 chips, and others.
Tuner TDTK-G731D 9965 100 48497 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T315XW06 V3 CELL
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: MVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Glass Depth: 0.70 + 0.70 mm
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V