Technical description and composition of the PHILIPS 26PF4311S TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 26PF4311S / 10
Chassis / Version: LC4.31E AA
Panel: LC260WX2 (SL) (B2)
T-CON: LC260WX2-SLA1 (C) 0780-0062A 6870C-0062A
Inverter (backlight): 2 pcs KLS-EE26CI-S (P) kls-EE26CI-M (P) 6632L-0223F TE26B-M (A) rev03 6632L-0290D 6632L-0291D
Power Supply (PSU): PLCD170P2 3122 137 23191 // DPS-160NP
PWM Power: DLA001D (PWM = L6598), NCP1207A (PWM), L6562D (PFC)
MainBoard: 3139-123-6117.2 WK542.2
IC MainBoard: gm1501-LF-M4747CF_0710S, M29W400DT, TDA15021H / N1C91, TDA8931T
Tuner: UL1318S / AI H-3_3139147 19801A
Specifications 26PF4311
PHILIPS 26PF4311S
General recommendations for repairing TV LCD
Like all other televisions, it is advisable to start PHILIPS 26PF4311S / 10 with a careful inspection of both external and internal elements and modules. Often, for certain external signs, it is possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. If ring cracks are detected in the soldering of the terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of an already known typical malfunction.
Power Module Repair
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, it does not make any sounds or any signs of operability when it is turned on, there is a certain chance that the DPS-160NP or PLCD170P2 3122 137 23191 power supply module is defective and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of processor power, which is typical for certain PHILIPS models and happens much less often. 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.
In most cases, a breakdown of the N-Fet converter key does not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM DLA00LD 92WA64L .. 1207A..L6562D .. EZ096 from the manufacturer.
When using the Active Power Factor Correction (CMC) circuitry in the power module, the search for faulty elements is somewhat more complicated.
Inverter Repair
If the PHILIPS 26PF4311S / 10 TV does not have an image, but there is sound, the malfunction should be sought in the power converter of the backlight (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the BP (power supply) for an overstated ESR.
Repairing an inverter 2 pcs. wear of lamps, protection is triggered, which turns it off for fire safety purposes. Diagnostics become impossible and protection needs to be disabled.
In such cases, the risk of failure of the power elements of the inverter is most likely, and special care is required during work, and after their completion, it is necessary to restore the protection circuit for further safe operation of the TV by the owner in normal mode.
Attention! For users and owners of 26PF4311S / 10 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-serviceability of the device.
Service manual and schematic diagram 26PF4311S/10 Chassis LC4.31E AA
MODELS: 26PF5321/10/12, 32PF5321/10/12, 37PF5321/10/12, 26PF7321/12, 32PF7321/12, 37PF7321/10/12, 42PF5421/10
The appearance of MainBoard 3139-123-6117.2 is shown in the figure below:3139-123-6117.2
3139-123-6117.2 can be used in televisions:
PHILIPS 26PF4311S/10 (Panel LC260WX2(SL)(B2)), PHILIPS 26PF5521 (Panel PLCD170P2), PHILIPS 26PF7321/12 (Panel LC260WX2-SL04), PHILIPS 32PF4311S/10 (Panel LC320W01 (sl)(06)), PHILIPS 32PF4311S/10 (Panel LC320W01(SL)(06)), PHILIPS 32PF5331/12 (Panel T315XW01 V9), PHILIPS 32PF7321 (Panel LC320W01), PHILIPS 32PF7331/12 (Panel LC320W01), PHILIPS 32PFL3321S/60 (Panel LC320W01 (SL)(06)), PHILIPS 37PFL3321/10 (Panel LC370WX1-SL04), PHILIPS 32PF3321/12 (Panel CLAA320WB02 (P)), PHILIPS 37PF3321/12 (Panel LC370WX1 (SL)(04)).
PSU Advanced
The 26PF4311S / 10 model uses a PLCD170P2 power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, it is a boost converter based on the L6562D PWM controller, which eliminates the charge current of the electrolytic capacitor of the rectifier filter directly from the network through open diodes when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the PHILIPS 26PF4311S device:
Installed matrix (LCD panel) LC260WX2 (SL) (B2).
The matrix control uses the Timing Controller (T-CON) LC260WX2-SLA1 (C).
Inverter 2 is used to power the backlight.
The necessary supply voltages for all nodes of the PHILIPS 26PF4311S TV are generated by the PLCD170P2 power module or its analogs using the DLA001D (PWM = L6598), NCP1207A (PWM), L6562D (PFC) microcircuits.
MainBoard - the main board (motherboard) is a module 3139-123-6117.2, using microchips gm1501-LF-M4747CF_0710S, M29W400DT, TDA15021H / N1C91, TDA8931T and others.
The tuner UL1318S / AI H-3_3139147 19801A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC260WX2-SLB2
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 700: 1
Display Colors: 16.7M (8-bit)
Response Time: 9/9 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 17 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V