Question about Akai CFTD2083 20 in. TV/VCR/DVD Combo

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Burnt Resistor I need the value for a resisotr R408 and diode D405 any idea without buying the whole manuel ??? keyzo54@aol.com

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You can tell the person at Radio Shack by telling them the number and the color and order of the stripes on the Resister and he/she can get it for you.

Posted on Jun 07, 2008

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I have a RCA Scenium D52W135D, that wont come on. every great once in a while it will. When you plug it in it starts to warm up then shuts back down. Keeps repeating. It flashes a code at you through the...


have scenium d52w135d combo burnt power resistor in deflection board,do i need to replace the the whole board? or just the resistor,and where can i find this resistor?

Nov 03, 2009 | RCA D52W135D 52 in. TV/DVD Combo

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Burnt Zener diode... Voltage spec??


On the cathode of the zener diode look for a filter cap and check its value the voltage of the zener should be less than the working voltage of the zener. Basicly its likely being used as a shunt regulator as protection and regulation of the voltage. When the zener hits a certain threshold it will breakdown and start conducting to ground until the supply regulates and then it will recover. If the filter cap for that voltage rail was 25V I would guess that the zener would probably be regulating between 12 and 20 volts. I'd pick a 15V Zener its probably +- %10 on the original and any system should be able to take a %10 tolerance as a general design rule.

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TV fixing


On some of these sets i have notice a resistor opens leading to horz. osc. circuit allowing set not to come on as long as the diode you replaced is not shorting out again . Follow the path this diode takes to that circuit . It's been awhile since i've worked on one of those but they were a common problem . Also include the model # if this does not take care of problem and i'll do alittle research on that chassis. Good luck

Feb 28, 2008 | Combination Televisions

1 Answer

Power problem


A common failure in these units is Q401, Toshiba p/n# Bz510004 is a 2SA1624 (HV amplifier) which finally fails due to a resistor R408 Toshiba p/n# Bz210285 a .47 ohm/1w metal oxide having changed in value and at last opening...
This isn't an expensive repair for a qualified shop - but I would suggest not continuing to test your shutdown circuit. What's happening is that HV (high Voltage) is builds beyond tolerances and the shutdown circuit turns your unit off to keep from causing any severe damage. If it failed you could likely burn out the SMPS or cause some substantial damage..
Good Luck!
Bill

Dec 01, 2007 | Toshiba MD20F51 20 in. TV/DVD Combo

1 Answer

I'd like to add another on the power problem


A common failure in these units is Q401, Toshiba p/n# Bz510004 is a 2SA1624 (HV amplifier) which finally fails due to a resistor R408 Toshiba p/n# Bz210285 a .47 ohm/1w metal oxide having changed in value and at last opening...
This isn't an expensive repair for a qualified shop - but I would suggest not continuing to test your shutdown circuit. What's happening is that HV (high Voltage) is builds beyond tolerances and the shutdown circuit turns your unit off to keep from causing any severe damage. If it failed you could likely burn out the SMPS or cause some substantial damage..
Good Luck!
Bill

Nov 10, 2007 | Toshiba MD20F51 20 in. TV/DVD Combo

1 Answer

Need value of RL06


There is a service bulletin for this problem: Fixfinder Model: 19TVR60 Chassis: Circuit: Horizontal Part: CL05 Symptom: No Horizontal Deflection and RL06 is Burning. FOUND CL05 OPEN Solution: Replaced CL05. RL06 = 680 ohms 2 watt resistor CL05 = .39 UF 250 volt poly capacitor

Aug 29, 2007 | GE 19TVR60 19 in. Combo

2 Answers

RCA 20f510td


Sounds like a thermal breakdown of a componet. it could be in the main power supply regulaor supply or even a bad capacitor in the power or sweep supply. In some cases Zener diodes can break down and change values after warm up. In some cases also bad solder connections in the highvoltage section, or the power supply can cause this problem. It is a hard call without being able to look at the set. Just a few leads on where to go first. most likly a combo unit, such as this one , would cost you more then a new one these days. Good Luck PS Please dont forget to rate this thread.

Dec 09, 2006 | RCA 20F510TD 20 in. TV/DVD Combo

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