Thursday 23 January 2020

REPAIR / SERVICING TV PHILIPS 32PFL3258T

Technical description and composition of the PHILIPS 32PFL3258T TV, type of panel and applicable modules. The composition of the modules.
PHILIPS LED
Model: 32PFL3258T / 60
Chassis / Version: TPM10.1E LA
Panel: TPT315B5-EUJFFA REV: S1A
LED backlight: 31.5 2K13 32PCS-V3 2PGLCTXF8C624-F46
T-CON: TVP_LC320EUJ-FFA1_VER 3.0
LED driver (backlight): integrated into PSU
PWM LED driver: PF7900S, PF7700A
Power Supply (PSU): 715G5793-P02-000-002H
PWM Power: PF6200 (PWM flyback), NR111D (PWM Step-down)
MainBoard: 715G5713-M0F-000-005K
IC MainBoard: CPU: MT5580MPOI; DRAM: H5TQ2G83DFR; NAND Flash: TC58NVG2S3ETAI0; SOUND: STA3818
Tuner: TDSY-G230D
Control: IR: 715G5772-R01-000-004S
Specifications 32PFL3258T
PHILIPS 32PFL3258T
General repair guidelines for TV LCD LED
Possible malfunctions
- The PHILIPS 32PFL3258T TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
With similar manifestations, in some cases, the 715G5793-P02-000-002H power module is faulty. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches and rectifier diodes of the converters for 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.
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. PF6200 PWM controllers (PWM flyback), NR111D (PWM Step-down), in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new ones, 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.
Often in such cases, there is no LED backlight. The reason can be both in the power of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
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, sometimes you can 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 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 715G5713-M0F-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). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - CPU: MT5580MPOI; DRAM: H5TQ2G83DFR; NAND Flash: TC58NVG2S3ETAI0; SOUND: STA3818 for new or obviously working. In cases where BGA technologies are used, defects are usually localized by the heating method.
Before replacing the TDSY-G230D tuner, if there is no tuning to 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
TV users and owners must remember that attempts to self-repair a PHILIPS 32PFL3258T TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!


Service manual and schematic diagram 32PFL3008T/60 Chassis TPM10.1E LA --->  part1, part2, part3


 The appearance of MainBoard 715G5713-M0F-000-005K is shown in the figure below:
715G5713-M0F-000-005K
715G5713-M0F-000-005K can be used in TVs:
PHILIPS 39PFL3208T/60 (Panel TPT390J1-HJ1L02), PHILIPS 40PFL4418T/60 (Panel LTA400HF30), PHILIPS 40PFL4508T/60 (Panel LTA400HF30 001 SAMSUNG code 186 p/n: 99659004071), PHILIPS 40PFL4528T/60 (Panel LTA400HF30), PHILIPS 32PFL4258T/60 (Panel TPT315B5-HVN01 REV.S210E), PHILIPS 32PFL3258T/60 (Panel TPT315B5-EUJFFA REV:S1A).
The appearance of the power supply
Main features of the PHILIPS 32PFL3258T device:
Installed matrix (LED panel) TPT315B5-EUJFFA REV: S1A.
The matrix control uses the Timing Controller (T-CON) TVP_LC320EUJ-FFA1_VER.
To power the backlight LEDs, a converter is used, combined with the power supply, it is controlled by the PF7900S, PF7700A PWM controller.
The necessary supply voltages for all nodes of the PHILIPS 32PFL3258T TV are generated by the 715G5793-P02-000-002H power supply module or its analogs using PF6200 (PWM flyback), NR111D (PWM Step-down) microcircuits.
MainBoard - the main board (motherboard) is a 715G5713-M0F-000-005K module, using CPU chips: MT5580MPOI; DRAM: H5TQ2G83DFR; NAND Flash: TC58NVG2S3ETAI0; SOUND: STA3818 and others.
The TDSY-G230D tuner provides TV reception and channel tuning.