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Preamp Hi! I'm not very technically minded as far as insides of stuff goes. I took off the casing and all I can see is soldered to the circuit board. What do you mean by 'tubes'. I cannot see anything i would be able to remove. Thanks!

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It is old electronic component means valves mainly used in amplifier and tv for amplification and other electronics job.

Posted on Jul 22, 2008

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Eton e5 sw shot


The SW FET preamp transistor, Q1, on the underside of the circuit board blows if a static electric discharge hits the whip antenna. In my case, a cat rubbing against me & the radio on a very dry winter day did it in. The back & circuit board has to be removed to get at it. The micro transistor & the solder connection are very tiny, so hard to replace. The antenna jack should still work, because the preamp is only for the whip antenna's SW reception. An easier solution would be to just run a wire from the antenna jack to the whip antenna, but you would no longer have the whip's preamp benefits, or just use a longwire antenna connected to the jack for SW. Also beware plugging into the jack disables the AM ferrite antenna inside, so you might not want anything plugged into it for AM reception because the internal ferrite seems to perform better than any external antenna.

Jan 17, 2013 | Eton E5 Radio

1 Answer

It started with an f11 problem. i would unplug it and then it would work again. now it got the f11 and when I unplug it and plug it back in there are no lights-= nothing


Hi,

The F11 code is saying there's a communication problem between the CCU circuit board and the motor control unit (MCU). Most often the problem is on the CCU circuit board, there are bad solder joints, also called cold solder joints on the board where the spade connectors and relays (5 of them) are supposed to be soldered firmly to the circuit board. Those spade connectors also carry the main power into the machine. If there's no power to the machine I would suspect those spade connectors on the CCU are not making contact with the circuit board. The cure is to remove the CCU (inside machine, top, back, plastic case) take out the plastic case then the circuit board, it's easier that way. Then touch-up those solder joints I mentioned. If you're not up on soldering techniques then remove the plastic case with the CCU inside it and take it, along with this response, to a good appliance repair shop and they should be able to help you out. Once those points are taken care of it should also take care of (or prvent) the FdL code. That code goes off for the same reason as the F11 code, bad solder joints. Good luck.

Apr 19, 2011 | Washing Machines

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Whirlpool Duet GHW925OMW2 First we had problems with door latch, so we replaced that. Now code F11 keeps coming up. What do we do now?


Hi,

The problems you're having stem from the CCU circuit board (inside machine, top, back, plastic case) there are bad solder joints (also called cold solder joints) on the circuit board where the spade connectors and relays (5 of them) are supposed to be securly soldered to the circuit board. The loose joints control the communications between the door lock (code FdL) the Motor control section (code F11) and the main circuit board. The cure is to remove the top of the washer then remove the CCU plastic case with the circuit board, it's easier that way, then remove the board and touch-up those solder points I mentioned. They're easy to spot, they are the biggest solder joints on the board. Remember to mark all the connectors, they are keyed but you should mark them anyway. If you're not up on soldering techniques, just remove the case with board and take it, along with this response, to a good appliance repair shop and they should be able to help you out. Good luck.

Mar 17, 2011 | Whirlpool GHW9250M Front Load Washer

1 Answer

F11 error code what do i do


Hi,

Most often the problem stems from the CCU circuit board. There are bad solder joints on the circuit board (also called cold solder joints) where the spade connectors and relays (5 of them) are supposed to be securly soldered to the board. These connectors handle the connections between the door lock (code FdL) Motor control (code F11) and the main circuit board. Whirlpool had some bad quality control with these circuit boards. The cure is to remove the top of the washer then the CCU citcuit board case (inside machine, top, back, plastic case) then remove the circuit board and touch-up those joints I mentioned. They're easy to spot, they are the largest connections on the board. If you're not up on your soldering techniques, just remove the CCU case with board and take it, along with this response, to a good appliance repair shop and they should be able to help you out. Good luck.

Mar 16, 2011 | Whirlpool Duet GHW9150P Front Load Washer

1 Answer

Washer display dl and beeps then display F and wont do anything


Hi,

The FdL code is saying there's a communication error between the CCU circuit board and the door lock. 9 times outta 10 the problem is with the CCU circuit board (inside machine, top, back, plastic case) There are bad solder joints, also called cold solder joints, at the points where the spade connectors and relays (5 of them) are supposed to be firmly soldered to the circuit board. With these bad solder joints it's hit-or-miss if the CCU board recieves the the signal that the door is locked or not, and without the door locked info going back to the board, the machine will do nothing. The cure is to remove the plastic case with the CCU board in it, it's easier that way. Once the case is out then remove the board and touch-up those solder joints I mentioned. If your not up on your soldering techniques you can remove the CCU case with board and take it, along with this response, to a good appliance repair shop and they should be able to help you out. The solder joints to be repaired are easy to spot, they are the largest solder points on the board. Good luck.

Mar 02, 2011 | Whirlpool GHW9400 Front Load Washer

1 Answer

ERROR CODES F11 AND DL . CAN YOU TELL ME WHAT THEY MEAN AND A SOLUTION. THANKS


Hi,

F11 is lost communications between the CCU circuit board and the MCU circuit board and the FdL code is a door lock problem. There more than likly is no door lock problem and the lost communications is only a half truth. The biggist problem that whirlpool has with these machines is bad solder joints on the CCU circuit board that prevent communications between the MCU, Door Lock, and other things. The cure is to remove the CCU circuit board (inside, top, back of machine) It's in a plastic case, remove the plastic case with the board in it, it's easier that way. Then touch-up the solder points where the spade connectors and the relays (5 of them) are supposed to be securly soldered to the circuit board. If you're not up on soldering techniques, just take the case and board, along with this response, to a good appliance repair shop and they should be able to help you out. Good luck.

Feb 16, 2011 | Whirlpool GHW9400 Front Load Washer

1 Answer

Our washer keeps stopping and flashing F11 and will not finish load


Hi,

The F11 code is saying that there is a problem with the motor or motor control board, both at the bottom of the machine. Most often the problem is not there but rather in the communications between the CCU circuit board and the motor or motor control board. The CCU circuit board (inside back, top of machine, plastic case) has what's called cold solder joints where the relays (5 of them) and the spade connectors are supposed to be firmly soldered to the circuit board. Whirlpool had a quality control problem with these circuit boards but won't recall them. The cure is to remove the CCU circuit board in the plastic case (it's easier that way) then remove the circuit board and touch-up those cold solder connections I mentioned. If your not up on soldering techniques, you can remove the CCU case, with the circuit board inside, and take it along with this response, to a good appliance repair shop and they should be able to help you out. Good luck.

Feb 10, 2011 | Whirlpool Duet GHW9150P Front Load Washer

1 Answer

My whirlpool washer will not turn off and keeps blinking with 1 minute left. Model #WFW8500SR00 Can someone help me?


Hi,

You don't say what it's blinking (code F11 or FdL?) The problem may be communications between the CCU circuit board and the MCU circuit board. The problem is most likely with the CCU circuit board (inside, top, back, plastic case) There are bad solder connections where the relays (5 of them) and the spade connectors are supposed to be firmly connected to the circuit board. Humidity or vibration will often make and break the communication circuit, many times stranding the machine during the cycle. The repair is to remove the CCU case then remove the circuit board and touch-up those solder joints I mentioned. If you're not up on soldering techniques you could remove the CCU case with the circuit board and take them, along with this response, to a good appliance repair shop and they should be able to help you out. Good luck.

Feb 10, 2011 | Whirlpool Duet GHW9150P Front Load Washer

1 Answer

The washing machine doesnt finish the wash. When it is almost done it starts to beep and flashes the letter F. This happens before the drain/spin cycle. Help!


Hi,

This problem is most often the CCU circuit board (inside, top, back, plastic case) there are bad solder joints on the circuit board where the relays (5 of them) and the spade connectors are supposed to be firmly soldered to the board. Often times the vibration of the machine will make or break one of these connections causing the machine to stop at various times. The cure is to remove the CCU case then the circuit board and touch-up those solder joints I mentioned. If your not up on soldering techniques you can remove the CCU case and circuit board and take them, along with this response, to a good appliance repair shop and they should be able to help you out. Good luck.

Feb 10, 2011 | Whirlpool Duet GHW9150P Front Load Washer

1 Answer

Receiver


My SA-AX710 overloads intermittently. The problem is a broken solder joint between a pin on one of the power transistor modules and the circuit board. To fix it, I removed the circuit board from the case and resolder the borken joint. Opening the case is easy. First remove the top of the case. Then remove the 3 screws in front. The front panel can then be pulled off. After that, remove all screws holding the connectors on the back. The circuit board can be detached from the case by removing the screws from the top of the board. Broken solder joint is probably one of the most common problems with modern electronics.

Mar 03, 2008 | Technics SA-AX710

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