Technical description and composition of the PHILIPS 26PFL3403S TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 26PFL3403S / 60
Chassis / Version: TCM1.0E LA
Panel: T260XW03 V.3 // V260B1-XC11 Rev11
T-CON: AUO-12201, BD8156EFV
Inverter (backlight): VIT7123.53 LOGAN Rev2 VIT71023.53 REV.2
PWM Inverter: OZ964SN, ST339 (14), ST324 (14)
MOSFET Inverter: P3004ND5G (5),
Trans Inverter: T51 0124 210B1 0820 05 9 J
Power Supply (PSU): PWL37C04 40-1PL37C-PWF1XG PLH800314A CH-04
PWM Power: Q110 (8), VIPer22A (Standby), GF383820, L6563 (PFC 14pin)
MainBoard: 40-MT01EU-MAI2XG
IC MainBoard: MT8200ALE, 24C32WP, 24C08, MT8293AE, K4S64 1632K-UC50, TDA9886TS, TDA7296, F9222, WM8738
Tuner: TEDE9-2C2B
Control: IR: 40-L20PFL-IRC1XG
Specifications 26PFL3403
PHILIPS 26PFL3403S
General recommendations for repairing TV LCD
It is advisable to start repairing the PHILIPS 26PFL3403S / 60 TV with a careful external examination of all its components and modules. Also subject to inspection are body elements, functional control buttons, screen, cords and connectors. Often, by visible changes, it is possible to determine the further direction of troubleshooting and localization of the defect before the start of the acquisition of oscillograms and the necessary measurements. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a hint in the assumptions about the causes and consequences of the malfunction.
Power Module Repair
Sometimes the PHILIPS 26PFL3403S / 60 TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is a failure of the common power supply module PLH800314A CH-04, PW37C04, 40-1PL37C-PWF1XG. When diagnosing and repairing the power supply, first of all, replace the swollen filter capacitors of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes or power key.
As a rule, the keys of flyback converters, which are used as an N-Fet field-effect transistor on a separate radiator, or integrated with a Q110 (8), VIPer22A (8), GF383820, L6563 PWM controller in a single chip, are quite reliable and rarely fail for no reason. The reasons for the breakdown of the key should be sought by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
Inverter Repair
If the PHILIPS 26PFL3403S / 60 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the display backlight nodes is likely. The lamps or the power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors.
Repair of the VIT7123.53 LOGAN Rev2 VIT71023.53 REV.2 inverter can often be somewhat complicated by the use of special protection circuits, which are designed to disconnect it in emergency cases for fire safety when the lamps are depressurized, or short circuits or breaks in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits in order to be able to make the necessary measurements at the control points of the circuit.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
Repair Main Board
If the motherboard SSB TCM1.0E 40-MT01EU-MAI2XG is faulty, first of all it is necessary to check all the linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes you can check the health of MB only by replacement. In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - MT8200ALE, 24C32WP, 24C08, MT8293AE, K4S64 1632K-UC50, TDA9886TS, TDA7296, F9222, WM8738, Tuner TEDE9-2C2B, which may require replacement with new ones.
Remember! Attempts to self-repair by users of the PHILIPS 26PFL3403S / 60 TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
Service manual and schematic diagram 26PFL3403S/60 Chassis TCM1.0E LA
MODELS: 19PFL3403, 19PFL3403S, 20PFL3403, 22PFL3403, 26PFL3403
The appearance of the MainBoard 40-MT01EU-MAI2XG is shown in the figure below:40-MT01EU-MAI2XG
40-MT01EU-MAI2XG can be used in TVs:
PHILIPS 26PFL3403S/60 (Panel T260XW03 V.3), TCL 26E92NH10 (Panel V260B1-LN1 Rev.C1), THOMSON 26N90NH10 (Panel V260B1-LN1 Rev.C1).
PSU Advanced
The PWL37C04 power supply module is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC node is a Step-Up Converter based on the L6563 14pin PWM controller, which evenly distributes high-frequency pulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the PHILIPS 26PFL3403S device:
Installed matrix (LCD panel) T260XW03 V.3 or V260B1-XC11 Rev11.
The matrix control uses the AUO-12201 Timing Controller (T-CON).
To power the backlight, an inverter VIT7123.53 is used, it is controlled by the PWM controller OZ964SN, ST339 (14), ST324 (14). A transformer T51 0124 210B1 0820 05 9 J. is installed in the inverter converter. Keys of the type P3004ND5G (5) are used as power elements of the inverter.
The necessary supply voltages for all nodes of the PHILIPS 26PFL3403S TV are generated by the PWL37C04 power module or its analogs using Q110 (8), VIPer22A (Standby), GF383820, L6563 (PFC 14pin) microcircuits.
MainBoard - the main board (motherboard) is a 40-MT01EU-MAI2XG module, using the chips MT8200ALE, 24C32WP, 24C08, MT8293AE, K4S64 1632K-UC50, TDA9886TS, TDA7296, F9222, WM8738 and others.
The TEDE9-2C2B tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T260XW03 V3
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (8-bit)
Response Time: 6/2 (Tr / Td)
Frequency: 60Hz
Lamp Type: CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
