REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Friday, 31 January 2020

REPAIR / SERVICING TV PHILIPS 42PF9641D

Technical description and composition of the PHILIPS 42PF9641D TV, type of panel and applicable modules. The composition of the modules.
PHILIPS
Model: 42PF9641D / 10
Chassis / Version: FJ3.0E LA
Panel: LC420WU2 (SL) (A1)
T-CON: 6870C-0107B
Inverter (backlight): 6632L-0349A CXB-5102-S, 6632L-0348A CXB-5102-M
Power Supply (PSU): 3H133WI PSC10135G M 2722 171 00445
MainBoard: 3104_313_60804
IC MainBoard: PACIFIC3-N3 (O), PNX3000HL / N3, PNX2015E / M1E02, T6TE0TBG-0001, PNX8550EH / M2 / S1, PACIFIC3-N3 (O), ISP1561BM
Tuner: UV1318ST / A
Control: IR: 3104 313 61014
Specifications 42PF9641D
PHILIPS 42PF9641D
General recommendations for repairing TV LCD
Possible manifestations of defects
- The PHILIPS 42PF9641D TV does not turn on, does not respond to the remote control and buttons on the control panel, does not light up or blink indicators.
In such cases, the fault should be sought first in the 3H133WI power supply module. It is necessary to measure its output supply voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
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 power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency-setting or damper ones, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM), if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply to the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
Sometimes, for diagnostic purposes, inverter protection must be disabled. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 3104_313_60804 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements PACIFIC3-N3 (O), PNX3000HL / N3, PNX2015E / M1E02, T6TE0TBG-0001, PNX8550EH / M2 / S1, PACIFIC3-N3 (O), ISP1561BM requires the necessary training and professional skills for repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
Before changing the tuner UV1318ST / A, if there is no possibility of tuning to television channels, you should make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Attention to users! Self-repair of a PHILIPS 42PF9641D TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!


Service manual and schematic diagram 42PF9641D/10 Chassis FJ3.0E LA

FOR MODELS: 32PF9531/10, 32PF9631D/10, 32PF9731D/10, 37PF9731/69, 37PF9731D/10, 42PF9641D/10, 42PF9731D/10, 42PF9831/69, 42PF9831D/10



 The appearance of MainBoard 3104_313_60804 is shown in the figure below:
3104_313_60804
3104_313_60804 can be used in TVs:
PHILIPS 32PF9531/10 (Panel LC320WX2 (SL) (01)), PHILIPS 32PF9731D/10 (Panel LC320WX2(SL)(01) code 022), PHILIPS 42PF9641D/10 (Panel LC420WU2 (SL)(A1)).
The appearance of the power supply
Main features of the PHILIPS 42PF9641D device:
Installed matrix (LCD panel) LC420WU2 (SL) (A1).
The matrix control uses the Timing Controller (T-CON) 6870C-0107B.
An inverter 6632L-0349A is used to power the backlight.
The necessary supply voltages for all nodes of the PHILIPS 42PF9641D TV are generated by the 3H133WI power module or its analogs.
MainBoard - the main board (motherboard) is a module 3104_313_60804, using the PACIFIC3-N3 (O), PNX3000HL / N3, PNX2015E / M1E02, T6TE0TBG-0001, PNX8550EH / M2 / S1, PACIFIC3-N361B, others.
The UV1318ST / A tuner allows you to receive television programs and tune to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC420WU2-SLA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 930.24x523.26 mm
Surface: Antiglare (Haze 13%), Hard coating (3H)
Brightness: 550 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 18 (Tr + Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 20 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
Posted By: FRANK at 07:45
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