Technical description and composition of the PHILIPS 14PF6826 TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 14PF6826 / 58
Chassis / Version: TF1.1E AA
Panel: QD14VL03 REV: 01 p / n: PCM5211209887
Inverter (backlight): QF132V4.01. 3,990,000 10,471
PWM Inverter: TL494C (16)
MOSFET Inverter: C5706 FDS9435A (SO8)
Power Supply (PSU): Adapter EA1050A-120 12V 5.0A
MainBoard: 04TA053D / B
IC MainBoard: CPU: ST92195E; 24C16W6 video processor VPC3230 C5 Scaler: DPS9450A A1; Sound: DTA7057AQ
Tuner: CTF5513RH
Specifications 14PF6826
PHILIPS 14PF6826
General recommendations for repairing TV LCD
It is advisable to start any repair and diagnostics of the PHILIPS 14PF6826 / 58 TV, as well as other devices, with a careful external examination of internal and external elements, including case parts, a display, buttons, and cables. It often happens that some damage to elements or connections helps determine the direction of the troubleshooting. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
If the 14PF6826 / 58 TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power module. In some cases, only the regulator or power converter of the control processor may be faulty, which is typical for some PHILIPS models. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and the power switch of the converter, which are often found in breakdown conditions in such situations.
Power switches in flyback converters fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The cause may be a malfunction of the PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
It is somewhat more difficult to find faults in the converter of the power module with an active KKM (power factor corrector).
If the PHILIPS 14PF6826 / 58 TV does not have an image, but there is sound, the malfunction should be sought in the backlight lamp power converter (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overstated ESR.
Diagnostics of the inverter QF132V4.01. 3990 000 10471 may be hindered due to the operation of the protection, which is organized by the designers to prevent negative consequences or fires in emergency cases, for example, during short circuits or breaks in the lamp power supply circuit, as well as their possible depressurization. To make the necessary measurements at control points or to take the necessary waveforms, repairmen have to block the protection circuits in order to be able to diagnose.
In such cases, special care should be taken during diagnostics, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
Attention to the owners! Attempts at self-repair of the PHILIPS 14PF6826 / 58 TV are not recommended by the manufacturer and can lead to serious negative consequences!
Service manual and schematic diagram 14PF6826/58 Chassis TF1.1E AA
The appearance of MainBoard 04TA053D is shown in the figure below:04TA053D
Main features of the PHILIPS 14PF6826 device:
Installed matrix (LCD panel) QD14VL03 REV: 01 p / n: PCM5211209887.
To power the backlight, an inverter QF132V4.01 is used. It is controlled by the TL494C PWM controller (16). As power elements of the inverter, keys of the type C5706 FDS9435A (SO8) are used.
To power all the internal components of the PHILIPS 14PF6826 TV, an external adapter type EA1050A-120 12V 5.0A is used.
MainBoard - the main board (motherboard) is a module 04TA053D, using CPU chips: ST92195E; 24C16W6 video processor VPC3230 C5 Scaler: DPS9450A A1; Sound: DTA7057AQ and others.
The CTF5513RH tuner provides television reception and channel tuning.
