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Last edited by capwizard; 02-06-2017, 03:59 PM. -
Re: MTX RFL600D Class D Monoblock Amplifier repair.
and bad capacitors -
Re: MTX RFL600D Class D Monoblock Amplifier repair.
Since the MOSFETs have the Drain connected together (the MOSFETs are connected in parallel, SOURCE are also tied together), when one does not make the connection, the one that is still connected will have all the current.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: MTX RFL600D Class D Monoblock Amplifier repair.
After go through all the bad connections, change 4 x 75339, 4 x IRF640 and 470uf/63v capacitor. Yes it works.Attached Filesif you find these attachements useful please consider making a small donation to the site
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Re: MTX RFL600D Class D Monoblock Amplifier repair.
Same problem here...the amp still holding up? At least what was replaced?Comment
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Hi guys, this is general query really
So I have a Hill DX3000 3KW audio amplifier here.
It has a topology/design like a class A/B but all the banks of output transistors (10 transistors in each 'side' of the channel) are NPN.
I was wondering what class this is. It doesn't fit the description of class A.
It also doesn't match class A/B or B amplifiers as all the examples I see have a complimentary output stage desigs (NPN/PNP) and clearly is not G, H or D
I looked for 'class A push pull' but that didn't tell me anything either
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Good day everyone.
I have on the bench an amp board from DALI SUB E-12F. It is class D amp with a smps on the same board.
The issue is that it powers off way before the rated power is reached (the protection circuit kicks in). It has an independent standby power supply, which stays on after the main power supply is turned off via a relay on the primary side (thus there is no reason to believe that the protection is triggered from the smps IC on the primary side).
The normal value of the positive and negative power rails is +/- 43V.
The positive rail stays... -
Hi to all forum members,
Got this faulty 350 watt atx psu dirt cheap from a local online seller as i am keen to use it as a learning tool to repair faulty power supply.
The faulty part is quite obvious from the burn area near the 16pin KA7500 BD pwm. The fuse is still intact with good continuity.
Upon power on ac, there is 5vdc standby power on cathode of diode D14 and about 10vdc on cathode of diode D13.(This should be the aux power to generate the 12v and 5v rail.)
Initially i replace the two burned resistors near my marked red arrow to 200 ohm resistor... -
My childhood best friend was killed about 9 years ago. His parents are finally letting go of his things, and they offered me his Polk RTi100 tower speakers. The Polk RTi100 towers are one of a handful of designs from the early 2000s that is a full range 3-way tower with a built-in self-powered subwoofer. This is accomplished with a plate amp integrated into the speaker input panel.
I think they used them for a while, but they've been sitting for at least a few years now. After about 40 hours of driving to their house and back (both they and I have moved in the last 9 years) I got... -
Hi Folks
Need some advice on how to test a subwoofer amplifier if i have access to only a multimeter.
Problem
I have a Boston Acoustics active Subwoofer (soundware S). Its rated output is 200W. But the output i am getting is very low i can barely hear/feel it even if put the gain at max. I replaced all the capacitors in the Subwoofer amplifier but still no change.
Is there anyway to test this without getting an oscilloscope/Function generator to see if the fault is with amplifier, driver or the source??
Any advice would be appreciated...
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