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.

How to use the site:
- If you landed here via any Search Engine, you will get what you searched for and you can search more using the search this blog feature provided by Google. You can visit more posts scrolling the left blog archive of all posts of the month/year,
or you can click on the main photo-page to start from the main page. Doing so it starts from the most recent post to the older post simple clicking on the Older Post button on the bottom of each page after reading , post after post.

You can even visit all posts, time to time, when reaching the bottom end of each page and click on the Older Post button.

- If you arrived here at the main page via bookmark you can visit all the site scrolling the left blog archive of all posts of the month/year pointing were you want , or more simple You can even visit all blog posts, from newer to older, clicking at the end of each bottom page on the Older Post button.
So you can see all the blog/site content surfing all pages in it.

- The search this blog feature provided by Google is a real search engine. If you're pointing particular things it will search IT for you; or you can place a brand name in the search query at your choice and visit all results page by page. It's useful since the content of the site is very large.

Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............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!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Friday, 7 February 2020

REPAIR / SERVICING TV PHILIPS 17PF4310

Technical description and composition of the PHILIPS 17PF4310 TV, type of panel and applicable modules. The composition of the modules.
PHILIPS
Model: 17PF4310 / 58
Chassis / Version: LC4.1E AA
Panel: LC171W03 (C4)
Lamp backlight: 6 Lamp CCFL
T-CON: 6870S-0172C
Inverter (backlight): integrated into PSU
PWM Inverter: UBA2070T
MOSFET Inverter: D5NM60
Power Supply (PSU): BL6L70P1 3122 133 32678
PWM Power: L6562D, TEA1533AT
MOSFET Power: 10NK60, 4NK80
MainBoard: 313912360191 3139 123 60191 v4 WK508.1
IC MainBoard: CPU: TDA15021H1 / N1C91; Scaler: GM5221H-LF
Tuner: UR1316S / A
Control: IR: 3139 123 58362 WK447.1
Specifications 17PF4310
PHILIPS 17PF4310
General recommendations for repairing TV LCD
Possible manifestations of defects
- The PHILIPS 17PF4310 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
In some of these cases, the main switching power supply, the BL6L70P1 module, is faulty. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (10NK60, 4NK80) and rectifier diodes in the converters for a short circuit.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode, or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers L6562D, TEA1533AT, in the absence of visible damage or obvious short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
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. If all the electrolytic capacitors of the filter for the power supply of the inverter are working, you should make sure the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
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 indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the motherboard 313912360191 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Sometimes they require checking or replacing (if necessary) the elements of the MainBoard - CPU board: TDA15021H1 / N1C91; Scaler: GM5221H-LF. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
If a tuner UR1316S / A is suspected of malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the required voltage levels and data exchange pulses with the processor via the I2C bus on the corresponding tuner pins.
Attention TV owners! Attempts at self-repair of PHILIPS 17PF4310 are not recommended by the manufacturer and can lead to serious negative consequences!


Service manual and schematic diagram ---------------> PHILIPS 17PF4310 Chassis LC4.1E AA


 The appearance of MainBoard 313912360191 is shown in the figure below:
313912360191
The appearance of the power supply
Main features of the PHILIPS 17PF4310 device:
Installed matrix (LCD panel) LC171W03 (C4).
The matrix control uses the Timing Controller (T-CON) 6870S-0172C.
To power the backlight, a converter is used, combined with a power supply, controlled by a UBA2070T PWM controller. As power elements of the inverter, keys of the D5NM60 type are used.
The necessary supply voltages for all nodes of the PHILIPS 17PF4310 TV are generated by the BL6L70P1 power supply module or its analogs using L6562D, TEA1533AT microchips and 10NK60, 4NK80 type power switches.
MainBoard - the main board (motherboard) is a module 313912360191, using CPU chips: TDA15021H1 / N1C91; Scaler: GM5221H-LF and others.
The tuner UR1316S / A provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC171W03-A4KG
Type: a-Si TFT-LCD, Panel
Diagonal size: 17.1 inch
Resolution: 1280x768, WXGA
Display Mode: Transmissive
Active Area: 372.48x223.488 mm
Display Colors: 16.7M
Frequency: 60Hz
Lamp Type: 6 pcs CCFL
Signal Interface: LVDS (1 ch, 8-bit)
Posted By: FRANK at 04:21
TAG: , , , ,