Technical description and composition of the PHILIPS 32PF9541 TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 32PF9541 / 10
Chassis / Version: BJ3.0E LA
Panel: LK315T3LZ43 // LC320W01-SL06 code 046
T-CON: CPWX3347TPAB
Inverter (backlight): IM3819F RDENC2266TRZF
PWM Inverter: BD9777
Power Supply (PSU): 3104_313_60925
PWM Power: MC34067P
MainBoard: 3104_313_60735
IC MainBoard: K4D551638H-LC50, PNX3000HL, ISP1561BM, K96561
Tuner: UV1318S / A I H-3
Control: RC4401 2422 549 01245
Specifications 32PF9541
PHILIPS 32PF9541
General recommendations for repairing TV LCD
TV PHILIPS 32PF9541 / 10, like other electronic devices, it is advisable to start repairing from inspection of external and internal elements. 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. 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
In the case when 32PF9541 / 10 does not turn on, does not respond to the remote control and buttons on the front panel, does not blink bulbs and does not show any signs of operability, most likely in this case the power module is faulty. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the cause should be sought in the power semiconductor elements of the pulsed flyback converter of the main power supply unit. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch of the converter, which can be installed separately on the radiator, or integrated with a PWM controller.
As a rule, the keys of flyback converters, which use an N-Fet field effect transistor on a separate radiator, or integrated with a PWM controller in a single chip, are reliable enough 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.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
Inverter Repair
In cases where the PHILIPS 32PF9541 / 10 TV has lost its 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.
When repairing the inverter, it is often necessary for diagnostics to turn off the protection, which, for the purpose of fire safety, turns it off in any emergency situation, for example, during a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
In these cases, special care must be taken in view of the risk of failure of the power elements. After completing all repair work, it is imperative to restore the protection circuits for full and safe further operation of the TV by the user.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
Service manual and schematic diagram 32PF9541/10 Chassis BJ3.0E LA
26PF9531/10, 26PF9631D/10, 32PF9541/10, 32PF9551/10, 32PF9631D/79, 32PF9641D/10, 32PF9968/10, 37PF7641D/10, 37PF9631D/10, 37PF9631D/79, 37PF9641D/10
The appearance of MainBoard 3104_313_60735 is shown in the figure below:3104_313_60735
3104_313_60735 can be used in TVs:
PHILIPS 26PF9531/10 (Panel LC260WX2 SL B2), PHILIPS 26PF9531/10 (Panel LC260WX2-SLB2 (SLA1)), PHILIPS 32PF9541/10 (Panel LC320W01-SL06 code 046), PHILIPS 32PFL7332/10 (Panel V315B1-L05 Rev.C1), PHILIPS 32PFL7572D/12 (Panel LC320W01-SLB1 116), PHILIPS 32PFL7582D/10 (Panel LC320W01 (SL)(06) code 046), PHILIPS 37PFL7562D/10 (Panel T370XW02 V05), PHILIPS 37PFL7332/10 (Panel LC370WX1 (SL)(B1)).
The appearance of the power supply
Main features of the PHILIPS 32PF9541 device:
Installed matrix (LCD panel) LK315T3LZ43 or LC320W01-SL06 code 046.
The matrix control uses the Timing Controller (T-CON) CPWX3347TPAB.
To power the backlight, an IM3819F inverter is used, controlled by the BD9777 PWM controller.
The necessary supply voltages for all nodes of the PHILIPS 32PF9541 TV are generated by the power supply module 3104_313_60925, or its analogs using MC34067P microcircuits.
MainBoard - the main board (motherboard) is a module 3104_313_60735, using chips K4D551638H-LC50, PNX3000HL, ISP1561BM, K96561 and others.
The UV1318S / A I H-3 tuner allows you to receive television programs and tune to channels.
Additional technical information about the panel:
Brand: SHARP
Model: LK315T3LZ43C
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: ASV, Normally Black
Active Area: 697.68x392.26 mm