Dicas Reparação SAMSUNG




Modelo - Chassis


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(Chassis)
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Samsung CW28C33N
Dead. in safety modeLooks like l.o.p.t but was traced to small decoupling cap on 200v line on tube base, dead short
Samsung CK-5320ZR SCT11D
Field collapseCheck R410 1ohm in feed to D403 for o/c
Samsung CB7230WT
Vertical output problems, Vertical output ic fails repeatedly !Fit a new IC, clean old heatsink compound, add fresh compound thinly on the surface. Now disregard all the other modifications previously suggested and ADD a large heat sink on the existing heatsink screw another one on top
Samsung TXG2547 K51A
No power, Voltage not changing on pin 18 IC901 SZM-368ET2Check dz906 short, key-in 1 pin 9 of ic901
Samsung CB5012Z P58SC
No colour, stuck on secam onlyCheck R514 100K open circuit or very high value
Samsung CB5012Z P58SC
Stuck in SECAM modeChange resistor R514 100K
Samsung TV-Vid Combi Model: TVP-3350IS SVC11C
Set stuck in standby modeCheck for failure of Q801 STRS6707
Samsung TV-Vid Combi Model: TVP-3350IS SCV11C
No RF audio - ok on VCR tape playback and via SCART inputHairline cracks in PCB tracks on motherboard directly at the back of the tuner
Samsung W124W6VN
Picture darkens and lightens continuallyThis was due to a faulty first anode potentiometer, as its part of the l.o.p transformer a new l.o.p.t had to be fitted
Samsung TXB1940
Red led blinks on / off, TV does not turn via power button and/or remote but after 20 minutes or so it turns on and works fineReplace R902, R901, R905, R903, R900A, Q902, and possibly the two one small and one large capacitors in the section labeled as the power supply. The board will be black under the components that are bad. Q902 is an NPN transistor and is hard to find.
Samsung SV-2303 SV633
Intermittent functionsCheck for dry joints on mode switch and clean off any grease inside the switch
Samsung CB7230WT
High pitch frequency squeal from transformerFix, by replacing the main transformer which costs up to $350 Australian Dollars or doing it the cheaper way covering the capacitors around the Transformer in glue as they cause frequency to run through to the main transformer which make this noise
Samsung CT566 K51A
No powerVoltage not changing on pin 18 IC901 SZM-368ET2
Samsung 20A5
Partial field collapseCheck IC301 TDA8350Q and the 2 associated unmarked capacitors 10uF and 100uF, 63v and the 10ohms,5w ceramic resistor across pins 3/5 of the above chip
Samsung CB7230WT
Vertical failure common faultThe reason for the failure is because the yoke is low impedance. The TDA3654Q i.c. has been designed to handle 12 ohms and over. Heat is the reason it destroys itself, the best cure is to place a small cpu fan on the heatsink


Assistência TécnicaAs dicas apresentadas destinam-se a técnicos de eletrónica, a tentativa de reparação ou assistência sem ter conhecimentos de eletricidade e eletrónica, podem provocar danos mais graves aos equipamentos e, devido a tensões muito elevadas em alguns circuitos, graves danos fisicos que podem constituir um risco em determinadas reparações.

Não arrisque reparar equipamentos com tensões elevadas se não tiver conhecimentos técnicos para o fazer em segurança.

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