Question about KLH ASW10-120 Subwoofer

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Resistor for KLH 120 subqoofer

770 resistor

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SOURCE: KLH ASW10-120 Subwoofer My KLH ASW10-120

Did you ever find a solution for this problem? I have the exact same thing happening with my KLH subwoofer and I'd love to know how to fix it!

Posted on Jan 26, 2010

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Sub-woofer quit working. Fuse is good and LED lights up but nothing works. Took out the amp and found that a ceramic resistor C61 on the board which seems to be a 5W1K ohm gets extreamly hot and the ICB...


if you can look at the underside of the board with the resistor on it, take a magnifying glass and look around the pins poking through from the components. It may be that the heat as unsoldered a component (be it resistor, capacitor or otherwise). Look for gaps in the solder around each pin, and if there are any holes around the pins, try filling them in with a little solder.

Jun 01, 2011 | KLH ASW10-120 Subwoofer

2 Answers

18 volt supply too low. resistor R42 burned. Q20 not installed. schematic shows 4700 ohm resistor with Q20 installed. What value if Q20 gone?


I would fit the same type, unless the schematic shows a change, which clearly it doesn't. However I would be surprised if R42 burnt up alone! Look at the schematic, is R42 linked to any other transistor or part? If so check them if you can.
By the way is R42 a fuseable resistor, for example is the symbol on the schematic or on PC board different to most other resistors?

Feb 18, 2010 | KLH ASW10-120 Subwoofer

1 Answer

KLH ASW10-120 Subwoofer My KLH ASW10-120


Did you ever find a solution for this problem? I have the exact same thing happening with my KLH subwoofer and I'd love to know how to fix it!

Dec 26, 2009 | KLH ASW10-120 Subwoofer

1 Answer

Hum no audio output


There are a lot of folks who've had power supply issues with this sub. Typically, the large resistors fail, which takes out the capacitors.

If you know how to read schematics and replace parts, then these might be helpful to you:

Here are the two pages of schematics from KLH. I wrote to their tech department and explicitly asked for permission to share them here.

Here's the lower board, which has the power supply:
KLH ASW 10-120 subwoofer schematic - lower board


Here's the upper board:

KLH ASW 10-120 subwoofer schematic - upper board

Dec 22, 2009 | KLH ASW10-120 Subwoofer

1 Answer

Model KLH KL-2400 Reciever keeps popping fuses. Resistor in power input ckt is color coded YellowVioletYellow Gold for 470 Ohms 5% Tol. However this resistor reads 370 Ohms. Resistor needs replacement?...


470.000 ohms not 470 ohms 470k ohms at 5% tol. either the main p.s. diodes are shorted or the output and driver transtors are shorted causeing the fuse to blow....

Nov 17, 2009 | KLH KL2400 Tuner

1 Answer

Model KLH KL-2400 Reciever keeps popping fuses. Resistor in power input ckt is color coded YellowVioletYellow Gold for 470 Ohms 5% Tol. However this resistor reads 370 Ohms. Resistor needs replacement?...


First of all a resistor color coding of Yel-Vio-Yel is 470Kohms not 470ohms. You are probably reading some stray voltage in the circuit. Yes, both NEG terminals of the speakers are common. Usually a receiver that blows the main fuse has a power suplpy problem. Check the recifier diodes for shorts. Other than that, the output transistors may be shorted.

Check those out and post the results.

Dan

Nov 17, 2009 | KLH Audio Players & Recorders

2 Answers

No sound and smells like burning


There are a lot of folks who've had power supply issues with this sub. Typically, the large resistors fail, which takes out the capacitors.

If you know how to read schematics and replace parts, then these might be helpful to you:

Here are the two pages of schematics from KLH. I wrote to their techdepartment and explicitly asked for permission to share them here.

Here's the lower board, which has the power supply:
KLH ASW 10-120 subwoofer schematic - lower board


Here's the upper board:

KLH ASW 10-120 subwoofer schematic - upper board


Nov 08, 2009 | KLH ASW10-120 Subwoofer

2 Answers

How do I fix a blown amp


big red
check usually the fuse just blows up just change it

Oct 22, 2009 | KLH ASW10-120 Subwoofer

6 Answers

KLH ASW10-120B subwoofer


I realize that this is an old problem, but folks are still finding it on searches, so here goes.

Here are the two pages of schematics from KLH. I wrote to their tech department and explicitly asked for permission to share them here.

Here's the lower board, which has the power supply:
KLH ASW 10-120 subwoofer schematic - lower board


Here's the upper board:

KLH ASW 10-120 subwoofer schematic - upper board


Jan 25, 2008 | KLH ASW10-120 Subwoofer

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