Technical description and composition of the PHILIPS 15PF9936 TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 15PF9936 / 12
Chassis / Version: LC03E AA
Panel: LC151X01-C3P1
Lamp backlight: 4 Lamp CCFL
Inverter (backlight): AMBIT REV: 3 T50I034.01 3139 128 76751
PWM Inverter: LM339AM
MOSFET Inverter: SI4425
Power Supply (PSU): Adapter 12V
MainBoard: 3139-123-5680.3 WK309.5 & 3139 123 5592.4
IC MainBoard: FB7117.1 0320 A, FLI 2300 FB8551.1 AB 0331 A, TCS80251G2D-L16CB
Tuner: UR1316 / A
Control: IR: 3139 187 28921
Specifications 15PF9936
PHILIPS 15PF9936
General recommendations for repairing TV LCD
Possible malfunctions
- PHILIPS 15PF9936 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 often, with such manifestations, the main adapter power module is found to be faulty.
This model of TV is equipped with an external power adapter adapter type 12V, which the owner can purchase independently, and repairing it may not always be advisable, however, sometimes it makes sense to open it and eliminate simple typical defects typical of IPS. It is necessary to measure its output voltages, and in case of their absence, check the operability of the power switches of the converters and rectifier diodes for the probability of a short circuit.
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 microcircuits are usually checked by replacement with new ones, 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.
These manifestations can be triggered by the power module, or by inverter defects, as well as by the distortion of the currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the secondary windings of the transformers for an open.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after they are finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the motherboard 3139-123-5680.3 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - FB7117.1 0320 A, FLI 2300 FB8551.1 AB 0331 A, TCS80251G2D-L16CB with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the tuner UR1316 / A may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. You also need 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! For users and owners of 15PF9936 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-repairability of the device.
Service manual and schematic diagram 15PF9936/12 Chassis LC03E AA
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FOR MODELS: 15PF9936, 17PF9945, 23PF9945
The appearance of MainBoard 3139-123-5680.3 is shown in the figure below:3139-123-5680.3
3139-123-5680.3 can be used in televisions:
PHILIPS 15PF9936 / 12 (Panel LC151X01-C3P1), PHILIPS 17PF9945 / 58I (Panel LC171W03-A4).
Main features of the PHILIPS 15PF9936 device:
Installed matrix (LCD panel) LC151X01-C3P1.
To power the backlight, an AMBIT inverter is used, it is controlled by the LM339AM PWM controller. As power elements of the inverter, keys of the SI4425 type are used.
To power all the internal components of the PHILIPS 15PF9936 TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a module 3139-123-5680.3, using chips FB7117.1 0320 A, FLI 2300 FB8551.1 AB 0331 A, TCS80251G2D-L16CB and others.
The tuner UR1316 / A provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC151X01-C3P1
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.1 inch
Resolution: 1024x768, XGA
Display Mode: TN, Normally White, Transmissive
Active Area: 307.2x230.4 mm
Surface: Antiglare (Haze 13%), Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 350: 1
Display Colors: 16.2M (6-bit + FRC)
Response Time: 7/18 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 20 pins
Voltage: 5.0V
