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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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Sunday, 9 February 2020

TROUBLESHOOTING SOME DEFECTS IN SAMSUNG LCD TV'S

This article will direct the reader to defects related to Samsung LCD TVs, since it is a brand that has several models on the market.
LN26B350F1
Dark screen with image in the background (lamps do not light)
- CP815 exchange

LN26A450C1
Operating on 220V only
- Check CM807 / CP809 / DP802 / DP803

LN32B350F1
Don't care
- Change STR W6252

Check resistors RP810 to RP814, as shown in figure 1.


Figure 1 - Resistors to be checked







LN32C350
Stopped, but before let out a lot of smoke
- CP810 (shown in figure 2)







Figure 2 - Defective capacitor


LN32A550P3R
Don't care
- Exchange ICB801S and RB806

LE32S71BX
Source voltages at half their value
- ICM801S

LN37B530P2R
No picture, normal sound
- RB803, RB804, RB805, RB806, RP809, RP810, RP811 and the integrated FAN7530

LN40R81BX
Activating the keyboard functions alone, VOL and CH and IR functions do not work
- D101

LN26A330J1
Don't care
- CB808

LE32R74BD
Source voltages fluctuating
- DM854
NOTE: This diode comes in other models and has an identical defect. In the imminent appearance of a similar symptom, look for this diode first.

LN40A550P3R
Does not care or does not care sometimes
- Exchange electrolytics at source

Figure 3 - Source capacitors

















 
Posted By: FRANK at 07:45
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