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Celestion csw Ij am suspecting p/s. 14 volts on collector of relay drive, If I put spkr on input of relay switch there is sound,so amp is ok. 24v relay so I think cap in ps ng?

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using your remote try to adjust fine tuning or else open your tv and adjust the sound IF transformer

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SOURCE: ps 52 kx power supply will not hold load

thank you for your help . I have already fixed the power supply I double checked the transisters and found three bad so I replaced all the power transisters and it is fine . thanks again bob

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SOURCE: battery goes dead, i mean dead.

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Posted on May 27, 2009

alicantecoli
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SOURCE: AC compressor clutch not engaging. Fuses ok

sounds like lack of gas pressure,take it to specialist and and get it recharged to the correct weight of gas,it is positivly dangerous to play with this because the A/C uses high pressures and can cause frostbite in 2 seconds when trying to refill with these boy racer silly aftermarket top up cans.THESE SHOULD BE BANNED WORLDWIDE

Posted on Jun 28, 2009

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SOURCE: I have a Celestion CSW Sub woofer. It powers on as

This speaker has a low frequency roll-off filter. Does your program source have low enough frequencies to pass through the filter? The effect of the subwoofer on most music is very subtle unless there is heavy bass in the source. You should try some songs that have a heavy under beat.

How are you driving the CSW -- by way of the line input or as a series connection to your full range speakers?

Posted on May 06, 2011

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I'm replacing a missing relay on coleman furnace 7655-856, 120vac, 24vac 40amp 1no/1nc. what is the input voltage of the coil?


Input voltage to a 24v coil will be 24 volts ac. The 120volts is on the load side, NO/NC switches. The coil that causes the switches to act is a 24 volt coil.

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No sound on ch2 of output speaker


Switch rca inputs (may be the input wires), also switch speakers(maybe a bad spkr)... if neither works you prob have damage in the input stage of the amp...

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No sound from Celestion F20 subwoofer. Tweeter is OK, and so is the other speaker in the pair. Wiring OK as switched speakers around to test.


Since these can be bi-amped or bi-wired (and you don't indicate if that is the case) you need to make sure the jumpers are secure (see the last picture http://archiwumallegro.pl/celestion_f20-1062028198.html) or (if the jumpers are removed) that you have viable amplifier signals coming to each speaker within the cabinet.

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Gas furnace gmt090-3a, has a one link code. the electric gas gas does not get 24V usually. problem is intermittant, wiring appears good, no kinks, or fraying. bypassing the thermo sensors for the 24v...


Sound like you have figured it out. Good job. I suggest that you verify the results next time that it fails. When it fails. measure voltage at the "w" terminal on the circuit board. If 24 volts is present here and not at the gas valve terminals then you are absolutely correct. It is the circuit board.

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Wharfedale pro BX1360SD powered mixer intermittent fault - preamp section OK, no output from power amp (false overtemp detection? shutting down power amp??) please supply advice, circuit...


Wharfedale pro bx1360sd


I have had problems with this stereo mixer amplifier which had the symptoms of no sound output from either channel .

I opened up the unit and discovered that the amplifier was correctly amplifying my input signal up to a relay which switches the output through to the speakers .

This relay did not activate at all.

When the power switch is turned ON you should hear a click approximately 2 seconds later , if no click then there is a problem with the circuitry associated with this relay .

I traced out all the connections associated with this relay and made a circuit diagram .

The relay is a 24v relay and I will explain the way that I can see that this section of the amplifier works.

It has been designed to ;

  1. Create a slow start delay ( 2 seconds ) when the power is turned ON.

This it needed because otherwise there is a current surge and sparks from the relay turning on immediately.

  1. Thermal cutout mounted on heatsink . If the ventilation fan fails the heatsink and transistors may get too hot and the cutout will operate and cut power to the relay by going open circuit.
  2. Speaker protection from blown output transistors. There are 2 transistors q802 and q803 both 2sc1815. They are connected together emitter to emitter and collector to collector to form a differential Op amplifier I.C. If there is a blown output transistor then DC voltage will be detected by q802 and q803 and the relay will be switched OFF to protect the speakers .


Q804 turns On Q805 which turns On Q806 to activate the relay .

Voltages on transistors

Q802 and Q803 2sc1815

Base 0V Collector 12.9V Emitter 0V


Q804 2sa1015

Base 12.9V Collector 0V Emitter 15.1V


Q805 2sc1815 (driver for Q806)

Base 0V Collector 7.2V Emitter 0V


Q806 2sc1815

Base 0V at Turn ON then after 2 secs increases to 0.7V

Collector 2.8V ( transistor is activated as a switch Turned Fully ON ( saturated) to turn on the Load which is the relay .

Emitter 0V


I have replaced the following transistors to fix my amplifier q805 2sc1815 and q806 2sc1815 .If you are going to use a different type of transistor it may not work and also the lead connections of a 2sc1815 for the collector and emitter are different to those such as on a 2n2222( transposed).

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I have a Celestion CSW Sub woofer. It powers on as the light lights up but I get no sound i checked the fuse and it seems to be great and intact. I also checked the actual driver to see if it was blown or...


This speaker has a low frequency roll-off filter. Does your program source have low enough frequencies to pass through the filter? The effect of the subwoofer on most music is very subtle unless there is heavy bass in the source. You should try some songs that have a heavy under beat.

How are you driving the CSW -- by way of the line input or as a series connection to your full range speakers?

Jul 13, 2010 | Celestion CSW Speaker

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How do i wire the crossover on the dxd210/213


If the crossover is made to accept speaker level input from amp then.....Amp/head spkr output + to crossover + input. Amp/head spkr output - to crossover - input. Crossover midbass + out to midbass spkr + input. Crossover midbass - out to midbass spkr - input. Crossover vari-tweeter + out to tweeter spkr + input. Crossover vari-tweeter -3 or -0 or -6 out to tweeter spkr - input. You have to choose for your preference. 0db makes the tweeter respond normally. -3db mean 3db lower in volume...and -6 means 6db lower in volume. Choose based on your liking.

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AC, Fan-Auto, Fan-On... nothing works. the request from the Thermostat doesn't engage anything. Thermostat Dispay works. How do I know if it is getting the 24volts from the relay? I presume the display...


Open the air handler. Locate the low voltage transformer. One side is 220 volts input. The other is 24 volts output. Take your VOM and touch the test leads to the input to verify 220v in. Then touch the other 2 leads to verify 24v out.
If you have power in and no power out, replace the lv transformer.

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