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