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EW7507EK. Can anyone tell me what color wires go onto F-3, F-4, F-5 of the circuit board? I feel like an silly for not taking a photo before starting the repair

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Kenwood Electric Oil Heater. Model EW7507EK. Can anyone tell me what color order of wires onto the circuit board? I feel like an silly for not taking a photo before starting the repair. F3-5


Look carefully on the board itself. Sometimes the wire color codes are labeled right next to the connector. If not, there may be some other letter codes and these should match the ones on the thermostat.

Dec 22, 2016 | Kenwood EW7507EK Oil Radiator

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Wiring For Volume and Power Switch


I ripped the cord off the external thing-a-ma-bob for the volume and power switch on the Maxell Flat Speakers with Subwoofer unit, but managed to figure out which color wires attach to each numbered contact on the small circuit board inside the unit. The board has labeled contacts from 1 through 9, and following is the map for each color wire:
1 = Black (large wire, ground)  2 = Red 3 = Brown 4 = Orange 5 = Yellow 6 = Green 7 = Blue 8 = White 9 = Black (small wire)
I resoldered each wire back to the little board and it works like new. Much better than throwing them out and getting new ones, because these speakers have a decent sound and take up very little room. 
I hope this helps anyone who runs into the same situation, because I was unable to find this information anywhere else and had to figure it out by trial and error.

on Sep 04, 2008 | Maxell Flat Speakers With Subwoofer and...

1 Answer

The black wire in the cable to connect in the wall is disconnected in the circuits board where it is suppose to be connected?


I doubt anyone can give you a useful advice simply as only reference a "black wire".
Take some good photos of your board and post them, maybe seeing the problem someone can help you.

Jul 16, 2015 | Pool & Spa

5 Answers

Wont turn on, makes buzzing noise


FIXED
I have a deal with this kind corporates sabotaging for 2-3 times a month fixing computers and monitors.
The circuit boards for many BRAND NEW household devices, PCs, Computer monitors, dehumidifiers etc. purposely designed to work a little bit after warranty period and die quietly
Heater EW7507EK fixing. (soldering required)
Step 1. Turn it over. Unscrew 2 screws on the bottom of the face side.
Step 2. Mark and Unplug 3 wires from heating element. Unscrew the metal cover from circuit board. Immediately you'll see small black cylinder (CAPACITOR 470mF x 35V). Retail cost about $1- $3
Check this - the top of this capacitor rounded, not flat. That is mean it was "quietly blowup" and electrolyte evaporate.

Ely
Boston

Dec 16, 2012 | Kenwood EW7507EK Oil Radiator

1 Answer

I have a delonghi des 14 dehumidifier. Usually it goes into pause mode for 3 mins when you first turn it on with the yellow light on and then starts dehumidifieing.It now stays in the pause mode forever...


Just fixed this problem with my DES14. Its a fault with the circuit board inside the machine and is very easy to fix, even for a novice. Here is how to do it:

1) Open up the machine by removing the screws in the case. (Make sure it is unplugged!)

2) Locate the circuit board on the side of the unit.

3) At this point you have two options. If you want a unit with full functionality you need to buy a replacement circuit board. I found one on MasterSpares (http://www.mastersparesonline.com/product/index/10147) It costs about 30 pounds. Simply remove the old board and replace it.

4) If you want a working unit for no extra cost (but without the functionality of the humidistat) then remove the rectangular white connector from the circuit board which has red,blue,white and yellow wires entering it. Add an extra wire between the central white wire and the red wire that is adjacent to the yellow. (see photo).

5) Re-assemble the unit. If you have opted for the free option the unit will work when you plug it in and switch it on but will no longer cut in and out with different humidities (or have the annoying warm up period). Thankfully the water overflow cut-out will still work.

Hope it works for you! Feel free to ask if you are confused!

e7f7dffe-36d6-4801-952c-b67a83a8b06c.jpg

Nov 13, 2012 | Dehumidifiers

1 Answer

Kenwood heater will not turn on when plugged in


FIXED
I have a deal with this kind corporates sabotaging for 2-3 times a month fixing computers and monitors.
The circuit boards for many BRAND NEW household devices, PCs, Computer monitors, dehumidifiers etc. purposely designed to work a little bit after warranty period and die quietly
Heater EW7507EK fixing. (soldering required)
Step 1. Unscrew 2 screws on the bottom of the face side.
Step 2. Mark and Unplug 3 wires from heating element. Unscrew the metal cover from circuit board. Immediately you'll see small black cylinder (CAPACITOR 470mF x 35V). Retail cost about $1- $3
Check this - the top of this capacitor rounded, not flat. That is mean it was "quietly blowup" and electrolyte evaporate.
Step 3. solder new capacitor.
Enjoy
Ely
Boston

Nov 03, 2012 | Kenwood EW7507EK Oil Radiator

1 Answer

I have an older mpc 1000 & just today it started changing the programs & number of bars of the sequence I was making when I pushed the cursor.


There is probably a switch problem. IF these use the conductive rubber contact type switch buttons where a "pill" of conductive rubber is pressed onto a circuit board with traces, CLEAN the contact rubber AND the circuit board with 99% isoprophyl alcohol and Q tips. This type buttons feel "Rubbery and squishy" when pressed.

If the buttons have a hard tactile feel, then check for a bad button that might have broken internal parts and replace it... OFTEN you can tell by the "feel" when pressing compared to others.

In either case, disassembly and service is required.

May 12, 2010 | Akai Mpc1000 Music Production Center

1 Answer

2002 projection Hitachi TV color problem


This model uses two of the STK-392-110 CHIPS for convergence---two versions of this set---one has as you look from the back of the set a circuit board on the far right that has the chips and other parts.

I am going to attach 3 photos of this board--the first two show the board from either side and the third one shows the protection resistors--if you look close at that picture you will see two resistors burnt in the middle.

The other version of this set does not have a removable board like the one in the picture--entire chassis has to come up and replacement is done that way.

If you have the first one like in the photos--3 screws and a number of plugs and it comes right out--three of the plugs for that board are identical and you need to mark them carefully if you remove the board.

The two chips on the far right side (photo attached) can be purchased on EBAY for about 12 dollars--total parts cost if you can solder should be under 30 dollars.

I can tell you the seller there and if you decide to do it you can upgrade the parts by using stk-392-150 chips---same part but longer lasting.

If you want to do it let me know and I will give you a list of what you need---if you have the removable board it is a pretty easy set to fix.

SEE ATTACHED PHOTOS and if you have questions let me know.

If this information has helped you rate this solution as I do this here for free.

SD TECH

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Dec 26, 2009 | Mitsubishi WS-55511 55" Rear Projection...

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