Tech Tips

How to Disassemble KitchenAid Double Wall Oven

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information. 

The KitchenAid 30-inch double wall convection oven (model #KODE500ESS) is the focus of these tech tips.
Throughout this article are caution alerts signaling a part may be heavy, fragile or comprise unseen sharp objects.
Before beginning any appliance repair project, please remember to always unplug the unit from its power source or shut off the breakers that control the oven.

How to Remove Oven Door

Oven doors are surprisingly heavy, so be prepared when removing it from its hinges.

  • Open oven door all the way.
  • Rotate both door hinge locks toward the oven, releasing door hinges from oven, so it can be removed.
  • Close door to 45-degree angle; grab each side of door; and pull toward you to remove.
  • Lay oven door with handle side down on protective blanket or other soft surface.

How to Access Broil Element and Oven Sensors

  • Be careful to avoid sharp edges when removing and replacing heating elements and oven sensors.
  • Remove all oven racks to gain clear access to rear of oven.
  • Use ¼ inch nut driver to remove screws from bracket that holds  heating element to rear of oven.
  • Remove two screws that hold upper heat shield in place.
  • Carefully pull heating element away from back of oven and disconnect each wire from connector.
  • Ensure heating element wires are completely connected to  accompanying terminals.
  • Realign broil element and shield by inserting oven sensor through large opening in element bracket.
  • Realign smaller front shield and fasten in place with two screws previously removed.
  • Replace rear bracket screws.
  • With ¼ inch nut driver, remove screws that hold oven sensor bracket in place.
  • Gently pull sensor toward you until you see wire connector. (Avoid allowing wire to slip through rear panel or  double oven will have to be pulled out of  cabinet to correct.)
  • Disconnect wire connector.
  • When installing new sensor, remember to first connect wires to connector.
  • Feed wire through rear panel and secure sensor bracket with screws.
  • After reconnecting element and sensor, replace oven racks.

How to Disassemble Oven Door

One of the main reasons to disassemble the oven door is to replace damaged door hinges.

  • Use Philips screwdriver to remove four screws securing inner door frame to outer door assembly.
  • Remove frame, being mindful of sharp edges.
  • If replacing door hinge, lift window pack from outer door assembly. Remove two screws that secure hinge, as well as middle screws holding window pack bracket.
  • With screws removed, slide out old hinge assembly.
  • Install new door hinge by sliding assembly into outer door frame.
  • Replace screws and tighten.
  • Reassemble door by placing window pack in outer door assembly. Ensure engraved notations are visible.
  • Realign inner door frame on outer door assembly.
  • Replace and tighten four screws on door assembly with shorter screws inserted into frame bottom.
  • Reinstall door by sliding door hinges into designated hinge slots at 45-degree angle.
  • Lower door to fully open position and rotate hinge locks forward.

How to Remove and Replace Damaged Control Panel

  • Remove four screws, two on each side, holding oven frame to cabinet.
  • With help, slide oven about 4 inches out from cabinet.
  • With ¼ inch nut driver, remove two screws, one on each side, to remove control panel mounting brackets.
  • Remove four screws that secure panel assembly.
  • Lift control panel up to remove, being careful of sharp edges.
  • Disconnect  communication wire and ground wire from control panel.
  • Install new control panel by connecting communication wire and ground wire to user interface board.
  • Align control panel to frame and replace four screws that secure panel to mounting bracket.
  • Realign mounting bracket and secure with two screws.
  • Slide oven back into cabinet.
  • Ensure side trim pieces are in place and secure oven frame to cabinet.

How to Access Upper and Lower Thermostat and Cooling Fan

One of the signs that an oven has a blown or damaged thermostat is the oven is not heating correctly. Unfortunately, the entire double oven must be removed to access the thermostat.

  • Remove both oven doors as outlined above.
  • Remove bottom vent and oven racks.
  • Remove wall frame.
  • With help, remove entire oven from cabinet and lay on cardboard, blanket or something to protect the floor.
  • Use ¼ inch nut driver to remove both rear access panels, being careful to avoid any sharp edges.
  • To access lower thermostat, remove cooling fan blower first.
  • Remove blower fan access panel and disconnect baking element wires.
  • Disconnect power cable from blower fan assembly, remove fan assembly and set aside.
  • Use ¼ inch box wrench to remove bracket screws holding thermostat in place.
  • Use piece of tape to help indicate thermostat wire orientation. It does matter which wire goes to which terminal.
  • Attach wires to new thermostat and place where old thermostat was located. Tighten thermostat in place with screws previously removed.
  • Reposition cooling blower fan assembly on brackets and tighten screws.
  • Reconnect power wire.
  • Button up access plate.
  • Remember to reconnect bake element wires.
  • Replace rear access panel.
  • With help, lift and slide double oven back into cabinet.
  • Button up frame with screws previously removed.

Please note that you must access the rear panels if you want to replace a heating element, thermostat, or cooling blower fan assembly.

Special thanks to Fred’s Appliance Academy for this helpful tip!

CE Tech Tips — February 2019

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information. 

 Hitachi TV,  42HDS52A
Reason for Service: Low sensitivity, short range of remote
Solution: Check remote batteries first. If that doesn’t resolve, replace LED/IR receiver:  X480310. 

Insignia TV, NS-LCD37HD
Reason for Service: Solarized picture
Solution:  Found bad AS15 on T-Con board and replaced. 

Magnavox TV,  RPK712AK03  (P1)
Reason for Service: Vertical is collapsed.
Solution: Check the following: IC750, vertical chip, R445, should be 1 ohm/ half W., and C556, C558. 

Mitsubishi TV, WD65732
Reason for Service: At plug in, green front LED flashes continually and set won’t start.
Solution: Replacing DM board fixed this set. 

Philips TV, 50PF7220A/37
Reason for Service: Set starts for a second then shuts down with red flashing LED
Solution: Found two bad caps on power supply board: C8059 & C8060, both 3300uF/10V.

RCA TV, L46WD22YX5
Reason for Service:  No analog channels or audio, but digital channels okay
Solution: Found open fuse, 1C33 on main board. Replace with #275819. 

Samsung TV,  LNT4671FX/XAA
Reason for Service: Set takes a long time to come on, and there are click sounds.
Solution: Bad caps in the power supply: check CB850, 1000uF/10V.

Vizio TV, VX37LHDTV10A
Reason for Service: Set won’t start; logo stays amber
Solution: Found defective AMC regulator, U8.  Replacing it fixed the set.

Zenith TV, module 9-1909
Reason for Service: One color missing
Solution: Check 120k ohm resistors 5103, 5110 and 5119 on CRT board.  Then, check transistors on the main: Q2200, Q2201, Q2202.

 

 

 

 

 

 

CE Tech Tips — January 2019

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information. 

 

Emerson TV,  LC501EM3
Reason for Service: At power on, LED flashes and relay clicks.  This keeps repeating, but set doesn’t come on.
Solution: Touch pad controls were bad; replace to fix the set.

LG TV, 37LP1DUA
Reason for Service: Set turns on, then shuts down. Has backlight.
Solution: Found bad cap on power board:  C852, 470uF/10V.

Mits TV,  WD-65738
Reason for Service: Set starts to boot normally, then shuts down with 3-6 error.
Solution: Clean dust from exhaust fans and surrounding area, then check that fans are spinning freely.

Panasonic TV,  TCP50C1
Reason for Service: One blink error
Solution: If there is 5V at pin 9 of connector P25/A25, replace A main board.  If there is no 5V,  check for continuity between pin 9 of Connector P25 and pin 5 of connector P7 on P board.  If not, replace P board.

Polaroid TV, TDA3211C
Reason for Service: Dead set
Solution: Check and replace as necessary: two 10uF, 450V caps and D10 all in the power supply.

Samsung TV, LN22B360C5D
Reason for Service: When trying to turn on set, standby light begins blinking continuously, and set never starts.
Solution: Problem on SMPS/IP board.

Sony TV, KDL-55HX800
Reason for Service: Set comes on, then shuts down.  Has 7 blink error code.
Solution: The code indicates bad HLR board or BAL board. Do this: Disconnect power.  Unplug HLR board and plug set back in and turn on.  Test to see if set now works properly and does not shut down. If so, replace HLR board.  If set does not work properly after this test, replace BAL board.

Toshiba TV, 50H72
Reason for Service:  White screen with lines across
Solution: Found cold solder on black wire that feeds the convergence ICs. Repaired solder, replaced fuse F850 (5A) and both STK392-110 ICs.

 

 

 

 

 

 

How to Repair Leaking GE Washer

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information. 

While some malfunctions are more concerning than others, most of them can be easily fixed with a little guidance. To help get you started, we’ve compiled a list of some of the most common maintenance mistakes and component failures which often lead to a leaky washer.

Maintenance Tips

  • Excessive vibrations brought on by an unbalanced washer can cause water to spill out of an appliance as the machine agitates clothing. To determine whether or not a washer is balanced, place a leveler on the main top. If the appliance turns out to be unbalanced, simply correct the problem by adjusting its legs. Some floors though may be too unlevel to solve the issue. If the issue is not addressed, and the washer continues to vibrate uncontrollably, other appliance components may get damaged.
  • Leaks located at the back of the washer can indicate a loose hose connection. Before inspecting the hoses, turn off the appliance’s water
    supply, and pull it machine away from the wall. Start investigating the leak by examining the drain hose, which runs from the drain port on the washer to the standpipe or laundry tub. If either side of the hose feels loose, correct the issue. Or, if they are both intact, move on to the inlet hoses. The machine’s hot and cold inlet hoses run from the inlet valve on the washer to the hot and cold faucets on the laundry room wall. If one or more of the connections are loose, tighten them to stop the leak.
  • Washers are designed to handle a certain amount of detergent. When that amount is continuously surpassed, the soap residue leftover will end up clogging the overflow tube, resulting in puddles on the floor. Stick to the detergent recommendations in the owner’s manual to resolve any type of soap overuse.

                                       GE washer model ​WCSR2080BCC

Appliance Repair Tips

Unplug the appliance and turn off its water supply before starting any repairs. Safety goggles and gloves are needed to protect hands and eyes from sharp objects as you remove and replace damaged components.

The Tub-to-Pump Hose

When the washer tub drains, water travels through the tub-to-pump hose. As an appliance ages, the hose can crack, causing water to leak out. Replacing the damaged tub-to-pump hose is not complicated and should only take a little over an hour.

How to Replace the Tub-to-Pump Hose in Your GE Washer

  1. To gain access to the tub-to-pump hose, remove the washer’s front panel. At the left and right corners of the washer, insert a putty knife in between the main top and the front panel. Slide the putty knife toward the center of the appliance. When the knife makes contact with a locking tab, push down to release the mechanism. Once both tabs are disengaged, tip the front panel back, and take it off the washer.
  2. The tub-to-pump hose can be found in the washer’s lower right corner. Before disconnecting it, place a towel in the area underneath the component. Use pliers to loosen and slide the lower clamp up the hose. Then, pull the bottom half of the hose off the drain pump. A small amount of water is likely to come out of the hose, which should be caught with the towel. Next, use a nut driver to unthread the screw securing the upper hose clamp. Once the clamp is loose, disconnect the top end of the hose from the outer tub. Now the damaged tub-to-pump hose can be removed from the washing machine.
  3. Before discarding the old hose, take the top and bottom clamps off the part so they can be attached to the new drain hose.
  4. Slide the old clamps onto the new tub-to-pump hose. With both clamps attached, go to the washer and install the top end of the hose to the outer tub. Secure the connection by tightening the clamp screw with the nut driver. Then, attach the lower end of the hose to the pump. Using pliers, slide the clamp down the hose to secure the link between the drain pump and the hose.
  5. To complete the repair, reinstall the washer’s front panel. After the appliance is reassembled, plug it in and turn on its water supply. Test the new tub-to-pump hose by washing a load of laundry. If the washer doesn’t leak, the new component resolved the issue.

The Drain Pump

If the washer is leaking during the wash cycle or the drain cycle, there is a good chance it has a faulty drain pump. The drain pump pulls water from the washer tub and pushes it out of the appliance through the outlet hose. If the pump is cracked, water will leak onto the laundry room floor.

How to Replace GE Washer Drain Pump

  1. Start repair by taking off the washer’s front panel. In between the appliance’s main top and front panel are two locking tabs: one is near the right corner and the other is near the left corner. To disengage the tabs, slide a putty knife between the panels and press down. After both tabs are released, lift the front panel up and off the washer.
  2. Locate the drain pump and place a towel underneath it to catch any water that may come out during the repair. Next, disconnect the wire harnesses running to the drain pump. Then, use pliers to loosen the clamps securing the outlet and inlet drain hoses to the pump, and pull the hoses off the drain pump valves. With a socket wrench, unthread the screws holding the pump’s mounting plate to the bottom of the washer. Once the screws are removed, pull the damaged drain pump out of the appliance.
  3. To install the new drain pump, attach its mounting plate to the bottom of the washer. After the drain pump is in place, reconnect the wire harnesses and the outlet and inlet drain hoses. Make sure the hoses are attached properly and the clamps are securely linking the hoses to the pump valves.
  4. With the new drain hose successfully connected, reinstall the washer’s front panel. Once the panel is reattached, plug the appliance back in and turn on the water supply. To ensure the repair worked, test out the machine by running a wash cycle.

 

Special thanks to Fred’s Appliance Academy for this helpful tip!

How to Replace Main Control Board in Whirlpool Double Oven

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information. 

If both the bottom and top units of a double oven are not working, this should provide a clue as to which component needs to be replaced.

Tools Needed

  • Flathead Screwdriver
  • Needle Nose Pliers
  • Philips Head Screwdriver

Safety First

Unplug the oven from its power supply before beginning any work.

Symptoms

Check for the following to help diagnose the issue:

  • The bake and broil heating elements don’t work but test positive for continuity, proving there is a continuous electrical path.
  • The power source is delivering 240 volts of alternating current.
  • The bake and broil heating element connection wires show no signs of burn marks or damage.
  • Testing for continuity, the thermal fuse shows a continuous electrical path is present.
  • Check schematic and confirm ohms for the thermostat and heat sensor and test both for the correct amount.

If the power supply, heating elements, thermostat, fuse and heat sensor are operating correctly, it’s a good possibility that the main control board is malfunctioning and will need to be replaced. Since the thermal fuse is functioning properly, this symptom should convey that the control board is getting power but is incapable of operating the oven.

To repair, first remove the door to the lower oven:

  • Open lower oven door and find the hinges.
  • Release each hinge by pulling back on the hinge locks.
  • Position the door until it is about 45 degrees to the floor; lift it off its hinges; and set aside. (Be aware that oven doors are heavy!)

Remove the Cosmetic Molding

  • Remove the two bottom screws that hold molding in place.
  • Open the top door, locate and remove two more screws that hold the molding.
  • Remove the two screws that hold the bottom decorative molding in position.
  • Carefully remove all molding and set aside.
    Pro Tip: Keep track of screws by placing in a small jar.

Access the Main Control Board

  • Remove the four mounting screws located on the oven frame.
  • Pull the oven out slightly, about 3-4 inches, to gain access to the two control board mounting screws: two on the right side and two on the left.
  • Open the top oven door and grab the control board on each side. Pull it toward you and then pull up. You now have access to the control board with its menagerie of wire harnesses you will need to remove. However, there are few more steps prior to removing these wires.

Remove the Old Control Board

  • Carefully disconnect the ribbon cable that connects the touchpad to the main control board. This is the ribbon that communicates oven control actions to the other components. Be careful not to damage any pins as you remove it. Squeeze inward on the outer edges of the cable and pull the connection away from the board.
  • Remove four Philips screws that hold the board in position on the touchpad bracket.  Don’t forget to disconnect the grounding wire.
  • Place the touchpad on a flat workable surface.

Install the New Control Board

  • Line up the new control board with the screw holes on the touchpad.
  • Thread the ribbon cable through a slot located on the control board and gently push the cable into its accompanying tabs.
  • Reinstall the four Philips screws that hold the control board to the touchpad frame.
  • Although each wire harness is keyed to fit only one connection on the main board, it is wise to snap a picture of the old control board as there are at least two spade connectors that look alike, and you want to make sure they are correctly
    connected.
  • Remove the wire harnesses from the old main control board.
  • When disconnecting wire harnesses from any component, grip the connector gently and pull. Never remove the connectors by pulling on the wires as this may cause a wire to come loose in the connection.
  • The black connectors indicate a tighter fit, and you may need a set of pliers to provide additional leverage to help release the connection.
  • After removing all connections, remove the sub control board located on the left end of the old control board. The new control board does not come equipped with one.
  • Find the clip that holds the sub control board in place. Depress the clip and pull the board up to remove.
  • Now, install the sub-board on the new control board. Depress the clip, slide the board into place and release the clip to secure. That’s all there is to it.

Install Wire Harnesses to New Control Board

  • One technique used by technicians is to reconnect the ground wire first to help prevent accidentally dropping the new control board.
  • Reconnect the spade connections first. Here is where the picture taken previously should help. You need to ensure that these two connections return to the correct tabs.
  • Continue by connecting all other wire harnesses that are keyed to connect in one connection only.
  • Another technique is to simply work in reverse of the way you removed the connections.
  • Also, it may be possible to use the top oven cover to assist you in balancing the control board.

Replace the New Control Panel

  • The control panel has notched openings that slide over tabs located on the front of the oven.
  • Once you feel the panel is notched in. push it down and forward slightly and feel it click into place.
  • Secure in place with the Philips screws: there is no need to over tighten. Over tightening will sometimes strip or break softer screws.

Final Steps

  • Push the oven back in place and secure with four Philips mounting screws. You should use a drill gun on these screws for additional torque. But still, do not over tighten.
  • Reinstall the bottom decorative molding.
  • Reinstall the frame molding.
  • Reinstall the lower oven door. Place the door hinges in the hinge opening. Lift up and open to a 90-degree position. Slide the hinge covers over the hinges.
  • Close the door.
  • Reconnect the power.
  • Test the touchpad functions.

Special thanks to Fred’s Appliance Academy for this helpful tip!

CE Tech Tips — December 2018

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information. 

 

Panasonic TV,  TCL42E3
Reason for Service:  Won’t come on, one blink error code
Solution: LEDs were coming on, but only for a second.  Replaced LED driver board.

Toshiba TV,  50H72
Reason for Service: Dead & F470 blown
Solution:  Replacing C884 and F470 fixed the set.

LG TV,  37LP1DUA
Reason for Service: Immediate shutdown after powering on
Solution: IC851 in the power supply was bad.  SM #L6910.

Audiovox TV VE705, 7” LCD
Reason for Service: Dead set, no standby
Solution: Found bad cap in power supply, 1000uF/25V.

Hitachi TV,  60SDX88B
Reason for Service: Black rectangular bar floating up screen on all inputs; audio low and set may shut down.
Solution: Found and replaced open cap, CN06,  10uF/50V.

Westinghouse TV, TX-47F430S
Reason for Service: Set won’t turn on
Solution: Found bad capacitor on main board.  TC51,  470uF/16V

Samsung TV,  PN50A550
Reason for Service: Relays click when set plugged in. After few seconds, power shuts off then back on.
Solution: Replaced C102, 47uF/6.3V.  If still not working, replace DC to DC converter, MP2363DN.

Zenith TV,  9-1998 module
Reason for Service:  There was vertical foldover when brightness and contrast turned up.
Solution: Found and replaced leaky cap,  CX3233,  47uF/160V

How to Troubleshoot Non-Heating Whirlpool Oven

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information. 

If it wasn’t for your Whirlpool oven model WFG320M0BW, your family wouldn’t enjoy all those delicious meals you make for them. Unfortunately, the more use your oven gets, the more wear and tear its components endure. One of the most common
oven malfunctions failing to heat. Diagnosing and fixing an oven that is producing little to no heat is a repair you can probably handle on your own. To help you troubleshoot a non-heating oven, here’s a list of components known to affect heating:

Safety Reminder: Always unplug an appliance before starting a repair. If you’re working with a gas oven, turn off the gas supply valve. Always wear work gloves and safety goggles when fixing a malfunctioning appliance.

Check Your Gas Supply
Before inspecting any other components in your oven, test the appliance gas supply. If your oven isn’t receiving gas, it won’t be able to heat up. To check the gas supply, simply turn on a cooktop burner. If the burner ignites, gas is entering the appliance. If the burner stays unlit, pull the range away from the wall to ensure the gas cutoff valve is open. Once you confirm the valve is in the open position, contact your gas provider to find out why no gas is coming from the supply valve.

Oven Igniter
The oven igniter should produce enough heat to open the gas valve and ignite gas entering the appliance. Over time, the igniter can weaken, meaning it will take longer to heat up. If the igniter glows for over a minute without a flame igniting, it’s no longer functioning properly.

How to Replace the Oven Igniter in Your Whirlpool Oven

  1. Start the repair by removing the lower access panel from the back of the range. Once the panel is off, pull apart the igniter and gas safety valve wire harnesses.
  2. Open the oven door, and take out the racks. Remove the oven’s lower access panel by lifting the back up first, and then sliding the panel toward the front of the oven.
  3. The oven igniter is located on the side of the burner tube, which runs through the middle of the oven cavity. To remove the faulty oven igniter, detach the burner tube and take it out. To do so, simply unthread the mounting screws securing it to the inside of the oven. Once the burner tube is free, pull it and the oven igniter out of the oven cavity.
  4. Place the burner tube on a flat solid surface, and remove the screws securing the defective oven igniter to the burner tube.
  5. Align the new oven igniter with the mounting bracket on the burner tube. Secure the igniter with screws.
  6. Go back to the range and reinstall the burner tube. Push the igniter wires through the opening on the oven’s rear wall. Reinsert the oven’s lower access panel, and place the oven racks back in the appliance.
  7. At the back of the appliance, reconnect the igniter wire harness with the gas safety valve harness. Replace the lower access panel and secure it with the four screws removed earlier.
  8. Plug the appliance back in, and turn on the gas supply valve. Set oven to preheat and wait for it to warm up to determine if the new oven igniter solved the heating problem.

The Oven Sensor Assembly
The oven sensor and the oven control board work as a team to measure and regulate oven temperature. The sensor detects the temperature inside the oven cavity. If it is defective, the oven will not heat at all or the sensor accuracy will be off by 50 degrees or more.

How to Replace Whirlpool Oven Sensor 

  1. At the back of the oven, disconnect the sensor wire harness. Unthread the two screws securing the oven sensor to the range’s rear panel.
  2. Once the screws are removed, slide the sensor out of the opening at the back of the oven.
  3. Insert the new oven sensor into the hole in the rear panel. Replace the mounting screws to hold the sensor in place. Finally, reconnect the wire harness.
  4. Plug in the range, and turn the gas back on. Test the new sensor by turning the oven on and measuring the temperature inside with an oven thermometer.

Other Contributing Components to Non-Heating Oven Malfunction
The Oven Control Board, as mentioned above, works in conjunction with the oven sensor. While the sensor is more likely to malfunction, the control board can also end up failing. If this happens, the component may inaccurately read the temperature sent from the oven sensor, which can lead to the oven not heating at all or the temperature being significantly wrong. Replacing the defective control board is your best option.

The Gas Safety Valve regulates when gas is and isn’t released into the oven. If the component is working properly, the safety valve will open when the oven igniter begins to glow white hot. A malfunctioning gas safety valve won’t allow gas into the oven, even after the igniter is hot enough to ignite the gas. While a defective safety valve can happen, it is a rare occurrence, meaning you should rule out more common malfunctions first. However, if you do discover the gas safety valve is causing a
non-heating oven, replacing the component is the only way to fix the problem.

Special thanks to Fred’s Appliance Academy for this helpful tip!

CE Tech Tips — November 2018

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information. 

Akai TV, PDP4294
Reason for Service: Set won’t start; relay clicks with 6 blinks
Solution: Replaced C523 & C524 in power supply. 0.22uF/400V 

Samsung TV, HL61A650C1FXZA
Reason for Service: Set shuts down after being on for short time
Solution: Found lots of dust on fans and fan intake for the fans.  Cleaning enabled set to operate normally again.

Samsung TV, UN55C6900VFXZA
Reason for Service:
Dead, no blinking codes
Solution: Replaced ICB801 and zener ZDB802.

Sony TV, KDL46HX729
Reason for Service: Dead
Solution:  Replaced power supply, 1-474-306-11  G5 board.

Toshiba TV,  50H72
Reason for Service:  White screen with lines in it
Solution: Found cold solder on the black wire that feeds the convergence IC’s.
Repaired solder and replaced fuse F850 (5A) and both STK392-110 IC’s.

Vizio TV,  VO370M
Reason for Service: Remote not working
Solution: Found CR2 leaky on remote board. 

Westinghouse TV, TX42F430S
Reason for Service: Set seems to come on, (power light on) but no backlights
Solution: Found bad cap on main board: TC51,  470uF/16V. 

Zenith TV, A27A76R  (module  9-1998)
Reason for Service: Picture is too red, green or blue
Solution: Found leaky Q2205 on main and bad solder on Q5102 on CRT board.

Zenith TV, A27A76R
Reason for Service: Vert rolling and shrinking when cold.
Solution: Replaced CX2105, 220 at 35V.

Replacing Maytag Dishwasher Drain & Wash Impellers

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information. 

Many factors can cause dishwashers to leak. But if a leak occurs near the bottom of a dishwasher and the water pressure is low during the wash cycle, it likely needs new impellers.

To make the repair, order a drain and wash impeller kit, which is part #675806 for Whirlpool, Maytag and other common dishwasher brands. Then, follow these steps to install the new parts:

1. Unplug dishwasher and turn off water supply.

When repairing a major appliance, the first step is always disconnecting the unit from its power supply. Even though this replacement procedure doesn’t directly involve electrical components, it’s safer to unplug the appliance and turn off the water supply. This reduces the risk of leaks and water damage during the repair.

2. Access the pump.

Open the dishwasher door, remove the lower rack and set aside. Loosen the spray arm nut counterclockwise and set aside. Remove the whole lower spray arm. Next, take out the bearing — these are the loose parts that need to be set aside before you start dismantling the base of the machine.

3. Uninstall the old drain and wash impellers.

Remove the eight screws securing the pump to the base. Pick up the pump, and pull it free from the hose. Use a wrench to hold the impeller in place, then remove the screw in the middle of the impeller. Without the wrench, the part will spin in place. Set the screw aside, and lift the impeller free. Uninstall the filter assembly, and pull it out. The filter has a gasket around the top. If the part came with a replacement seal, remove the old one and set it aside. Clean the filter of hard water deposits and grime to ensure the new seal sets into place properly.

Lift the chopper and spring assembly away from the shaft. Then, unscrew and remove the cover. Now the drain impeller is completely accessible. Pry it free from the central shaft. If the drain impeller is secured too firmly in place from years of use, carefully chisel the part and break it free. Discard all of these parts.

Next, pry the seal away from the bottom of the shaft. Clean the area with a cloth or vacuum, especially if you had to break the impeller into parts. Make sure the white balls in the bottom compartment don’t get lost or removed. If the central shaft is rusty
or dirty, now is also the perfect time to clean or file it into better shape.

4. Install the new drain and wash impeller kit, and reassemble the machine.

These steps work in reverse from the kit removal in the previous step. The kit involves many parts that look similar, so be sure to refer to the installation diagram as needed to use the correct parts during installation. Before starting, you may want to keep the drain and wash impeller kit parts in a plastic container so they stay separate from the other parts you removed from
the machine. This can also help simplify the reassembly process because the drain and wash impellers are separated by older parts that will be reinstalled.

Start with the seal assembly. Slide the seal over the shaft, and make sure the seal is tightly aligned and flat with the base. Next, align the drain impeller hole with the pattern on the shaft. Slide it down against the seal, and place the cover into position. Secure it with the screw removed previously.

5. Install the spring and chopper.

Pick up the spring and chopper parts. Slide the long end of the spring into the edge of the chopper so the middle of the spring and the hole in the chopper align. Then, slide it over the shaft with the spring side down. Rotate the assembly clockwise until the start of the spring interlocks with the top of the impeller.

6. Reinstall the filter assembly.

Find the side of the filter assembly that has a flat section along the top. This is where the wide hose connects to the drain, so orient this section to the back of the machine when you put the filter assembly over the shaft. Retighten the four screws that secure the filter assembly in place.

7. Install the wash impeller assembly.

Line the hole in the middle of the wash impeller with the flat grooves in the shaft. Slide the wash assembly flush against the top of the filter assembly. Then, hold the impeller in place with your wrench again. This enables you to re-tighten the central screw.

8. Make sure the screw is firmly tightened.

This screw is what applies the pressure against the water seal below. Test the wash impeller to make sure you can manually rotate it without any drag or unexpected friction. Put the new seal in the filter’s housing. The ring should slide into the groove without much stretching or tension.

9. Reinstall the pump.

Firmly insert the pump’s arm into the supply tube. Then, shift the assembly on top of the filter assembly. Once it’s in place over the central shaft, re-secure it with the eight screws. Slide the split bearing you removed earlier on top of the central shaft. Next, put the lower spray arm assembly on top of it. Make sure it’s level before you tighten the spray arm nut. Once the assembly is
secured, make sure the spray arm can rotate without drag or wobbling.

10. Put the lower rack back into the machine and close your dishwasher.

This repair procedure has a lot of moving parts, but it doesn’t require extensive experience or specialty tools. All you need is the replacement parts and enough space to stay comfortably organized.

Special thanks to Fred’s Appliance Academy for this helpful tip!

Inner Workings of Microwaves

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information. 

Although microwave ovens vary in design, they are virtually all similar in function. Most models are equipped with preset cooking times, programmed according to the basic popularity of certain food items, such as popcorn. Microwaves also have power level setting and timing options for food items not included in the pre-set modules.

After the desired cooking setting has been chosen and the start button pressed, the control board sends 120 volts of electricity traveling through a series of components inside your microwave and converts it into high-powered radio waves that cook your food. Once the radio waves are inside the cooking area, they penetrate the food from the outside in causing moisture in the food to vibrate intensely. It is this vibration that generates the heat that cooks the food.

Models equipped with a motorized turntable, rotate food so that radio waves can cook the food uniformly. For more, watch this  5-minute video for a deeper understanding of how a microwave oven works. Here are some tips to deal with operational issues:

How to Remove and Replace the Magnetron in a Microwave Not Heating
If your microwave fails to warm or cook your food, it’s possible that the magnetron will need to be replaced. Due to the electrical danger involved, it’s recommended that this service be performed by a professional appliance repair company; here are the repair basics:

Tools Needed

  • Two insulated screwdrivers
  • Needle nose pliers
  • # 20 Torx screwdriver
  • Phillips screwdriver

The following procedure is for a Whirlpool microwave that sits above the range. Servicing will take some time and patience to complete. Several screws must be removed to access the magnetron. Place the screws in a container to avoid misplacement and then:

  • Remove turntable and set aside.
  • Using Phillips bit with electrical drill, dismount microwave by removing two screws that hold it to kitchen cabinet.
  • Tilt microwave toward you at about 45-degree angle and lift it off rear bracket that holds it in place on kitchen wall.
  • Remove grill and set aside.
  • Flip microwave on its back and remove eight Phillips-style screws. When completed, flip microwave back to its original position.
  • Remove 10 Phillips screws that hold microwave wrap in place. Remove rear cover and set aside.
  • Now remove eight more screws from top of microwave cover.
  • Don’t forget to remove two screws that hold blower cover in place. Remove cover and set aside.
  • With all exterior screws removed, you should be able to grab sides of cover and gently pull toward yourself, lift it from its place and set aside.
  • Remove panel that protects diode and capacitor.
  • Since capacitor retains residual voltage that could result in serious shock, you are going to short out remaining electricity.
  • Place metal end of one insulated screwdriver on one capacitor terminal and place  other insulated screwdriver on other tab. Cross screwdrivers and hold them together, metal to metal. You should hear pop or see spark discharging any
    remaining voltage in capacitor. To be safe, perform this task twice. After discharging residual voltage, and with microwave unplugged, it should be safe to proceed with removing magnetron.
  • Access magnetron by removing three Phillips type screws that hold waveguide to rear panel. The waveguide is a plastic tube-like guide that directs radio waves to inside of microwave.
  • Before removing waveguide, remove power cord ground wire from rear panel.
  • Remove power cord by sliding it out of its guide and set aside to keep out of the way.
  • Remove last screw holding waveguide in place and carefully manipulate waveguide from its place and set aside. There is one more part to remove before you can access magnetron.
  • Remove magnetron thermostat, which is held in place with two Phillips screws. Gently pull thermostat away from magnetron.
  • Use needle nose pliers to disconnect locking tabs from magnetron. Pinch tabs inward until you feel release and pull wire away from  tab. It does not matter in what order these wire tabs are reconnected to new magnetron; they are just
    completing a circuit.
  • Use #20 Torx screwdriver to remove four screws that hold magnetron in position. Lift old magnetron from its location and set aside. You are now ready to install new magnetron and return microwave to its previous state. You are going to pretty much do everything in reverse order, but following is a quick go-to guide that will help ensure you reassemble all parts and screws to their previous locations. It is no good to finally get the microwave back together only to discover the blower fan cover was not reinstalled, or worst yet, the waveguide.
    ● Install the new magnetron (two torx screws).
    ● Reconnect wire tabs.
    ● Return magnetron thermostat to proper location (two Phillips screws).
    ● Reinstall waveguide cover (three Phillips screws).
    ● Slide power cord into its guide.
    ● Reconnect power cord ground wire to rear panel.
    ● Reinstall high voltage protective cover (two Phillips screws).
    ● Reinstall cover, and don’t forget to feed power cord through fan opening.
    ● Ensure cover is flush with panel by placing slide into panel and ensure no gaps exist on either side.
    ● Reinstall back screws first to keep cover in place.
    ● Replace fan cover, making sure to slide tabs into designated slots.
    ● Reinstall all screws in top panels.
    ● Flip microwave on its back and reinstall the eight Phillips screws.
    ● Flip upright and replace grill, ensuring tabs line up to designated slots. Once grill is in place, use two Phillips screws to  secure. Do not over tighten any screw used to hold plastic part in place as plastic could crack or break.
    ● Enlist help to hold and balance microwave as you line it up with bracket that holds unit to wall.
    ● Feed power cord through designated hole in kitchen cabinet.
    ● Reinstall the two Phillips screws that anchor top of microwave to bottom of  kitchen cabinet.

Special thanks to Fred’s Appliance Academy for this helpful tip!