Technical description and composition of the PHILIPS 32PFL8404H TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 32PFL8404H / 60
Chassis / Version: Q548.1E LA
Panel: LC320WUF (SB) (N1) code 181 p / n: 932226687682
Inverter (backlight): PLHL-T826B
PWM Inverter: OZ9966GN
Trans Inverter: 2130KP0290C-F
Power Supply (PSU): PLHL-T826 B 272217100788
PWM Power: L6599D (PWM Resonant), FSQ510 (7)
MainBoard: 3139_123_64423V2 314302713783/313926866391 PNL 3139 123 64423v2 BD 3139 123 64433v2 - WK928.3
IC MainBoard: PNX8539EH24182 LAN9420-NU
Tuner: HD1816AF / BHXP 3139 147 27671F
Control: 2422 549 02362-NEW
Specifications 32PFL8404H
PHILIPS 32PFL8404H
General recommendations for repairing TV LCD
Any repair of electronic equipment usually begins with a careful external inspection of the device and troubleshooting. In this case, you should inspect all the elements of the PHILIPS 32PFL8404H / 60 TV, both internal and external. Sometimes, based on visible changes in the components of the device, it is possible to draw some conclusions and determine the direction of further troubleshooting even before the necessary measurements are taken. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
Power Module Repair
If the PLHL-T826B 272217100788 power supply module fails, the external manifestations may be different, for example, PHILIPS 32PFL8404H / 60 does not turn on at all and there is no indication of the indicator lights on the front panel. In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should always be started by checking the fuse and, if it is broken, it is first necessary to check the rectifier bridge diodes and the power switch for the possibility of an avalanche or thermal breakdown.
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 FSQ510 (7) from the manufacturer.
When using a power factor correction unit (PFC) in the power modules, troubleshooting becomes somewhat more complicated and requires additional experience and knowledge of their operation.
Inverter Repair
In cases where the PHILIPS 32PFL8404H / 60 TV has lost an image, and the sound is there and all other functions are operational, there is a possibility of an inverter (converter for powering the backlight) malfunction. When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power.
In most cases, the diagnosis and repair of the PLHL-T826B inverter is difficult due to the organization of protection, which turns it off in emergency cases to avoid fires during short circuits or breaks in high-voltage circuits and during depressurization of lamps. Often, repairmen block the protection circuits in order to make the necessary measurements at the control points of the inverter to identify the causes of the defect.
It should be remembered that when the protection is turned off, there is always a risk of failure of the inverter power elements during diagnosis. After repair, it is necessary to restore all standard converter protection circuits.
Repair Main Board
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
Remember! Attempts by the users of the PHILIPS 32PFL8404H / 60 TV to be self-repaired by users without the appropriate qualifications and necessary experience can lead to serious negative consequences!
Service manual and schematic diagram 32PFL8404H/60 Chassis Q548.1E LA
The appearance of MainBoard 3139_123_64423V2 is shown in the figure below:
3139_123_64423V2
3139_123_64423V2 can be used in TVs:
PHILIPS 32PFL7864H/60 (Panel LC320WUF-SBN1), PHILIPS 32PFL8404H/60 (Panel LC320WUF (SB)(N1) code 181 p/n: 932226687682), PHILIPS 37PFL8404H/60 (Panel T370HW03 V.2 code 189), PHILIPS 42PFL7674H/60 (Panel LC420WUF(SB)(N1)), PHILIPS 42PFL7864 (Panel 42 ), PHILIPS 42PFL8404H/60 (Panel LC420WUF-SBN1 code 183 p/n: 932226646682).
The appearance of the power supply
Main features of the PHILIPS 32PFL8404H device:
Installed matrix (LCD panel) LC320WUF (SB) (N1) code 181 p / n: 932226687682.
To power the backlight, an inverter PLHL-T826B is used, it is controlled by the PWM controller OZ9966GN. A transformer 2130KP0290C-F is installed in the inverter converter.
The necessary supply voltages for all nodes of the PHILIPS 32PFL8404H TV are generated by the PLHL-T826 power supply module or its analogs using L6599D (PWM Resonant), FSQ510 microcircuits (7).
MainBoard - the main board (motherboard) is a 3139_123_64423V2 module, using PNX8539EH24182 LAN9420-NU chips and others.
The tuner HD1816AF / BHXP 3139 147 27671F provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC320WUF-SBN1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1300: 1
Display Colors: 1.06B (8-bit + FRC)
Response Time: 6 (G to G)); 8 (MPRT)
Frequency: 120Hz
Lamp Type: 16 pcs EEFL Without Driver
Signal Interface: LVDS (4 ch, 10-bit), 92 pins
Voltage: 12.0V