Comments on: No Power In Telesonic DVD Player Solved

By: Ivan

Ivan — Fri, 08 May 2020 17:44:55 +0000

thanks gaffer

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By: Ulises Aguilar Pazzani

Ulises Aguilar Pazzani — Mon, 06 Nov 2017 02:31:28 +0000

great fix Mr muranga,
even if the battery of Your meter was of

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By: Owais Akhter

Owais Akhter — Fri, 03 Nov 2017 21:19:51 +0000

Dear Suranga,
Your multimeter shows low battery indication and this will not show you correct readings of most function. You must change battery and then use multimeter. If you can afford then I recommend to use quality multimeter with auto-range. Fluke will be better choice as their readings are more trustworthy and reliable and mainly safe if you accidentally test voltage on resistance or other function instead of voltage function.

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By: Owais Akhter

Owais Akhter — Fri, 03 Nov 2017 21:09:50 +0000

In reply to Elijah.

You may remove fuse from circuit and connect light bulb 60w or 100w in Fuse connection. This is how you connect light bulb in series with power supply. When you turn on power supply then bulb will act as fuse but will limit current to power supply. When first turn on power bulb will glow bright and then let capacitor charge and then bulb goes dim because of capacitor fully charged and indicating there is no short. If bulb still glow bright after few seconds then there is other components which is shorted.

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By: Owais Akhter

Owais Akhter — Fri, 03 Nov 2017 21:02:39 +0000

In reply to okunlola.

If you check with multimeter for diode or resistance testing function and connect your meter probes to drain pin and source pin you must not get low resistance or shorted indication similar to FET testing. If you use diode function of meter then you must get any voltage drop either side.

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By: Elijah

Elijah — Sun, 06 Aug 2017 06:11:51 +0000

How is the serial light bulb test connected?

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By: okunlola

okunlola — Tue, 25 Jul 2017 06:47:39 +0000

pls how do you no the viper ic was bad when you didnt supply power to it

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By: Yogesh Panchal

Yogesh Panchal — Mon, 24 Jul 2017 08:31:40 +0000

Good job! Suranga

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By: Humberto

Humberto — Mon, 24 Jul 2017 04:01:14 +0000

Good job Suranga.

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By: Albert

Albert — Sun, 23 Jul 2017 08:54:55 +0000

Another straightforward pro repair Suranga! I have replaced a couple of those Viper ICs too in the past. Like the VIPER12A (sop-8). They are often used in Washingmaschines, Dryers or other consumer electronics. And like probably in your device they often get short circuited between Drain and Source, which also blows a 47 ohm resistor. And both need to be replaced in these cases. And those ICs have, if I'm not mistaken, some sort of very low standby circuit integrated when the device is electronically switched off. And also the LNK304 and LNK305 are often short circuited together with a blown serie resister. Some consumer home appliances need a cooling down time before they are ready to switch on to prevent the mentioned parts from blowing up. (as I heard a friend of mine say who repairs these white goods frequently). Which seems like a contradiction because large heater elements are normally PTC resistors, that have higher resistances when they are still hot.

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