KitchenAid KPWB100OB service manual Power Supply Pcb Replacement, Control Pcb Board Replacement

POWER SUPPLY PCB REPLACEMENT

The power supply printed circuit board (PCB) provides DC voltage to power the control PCB located in the cradle arm and AC voltage to the heating elements in the waffle plates. (See Figure 5)

Figure 5

1.Unplug the waffle baker.

2.Remove base; see Component Access.

3.Remove six (6) blue-capped black and white AC leads from the power supply PCB located in the base.

4.Remove white, 5-pin connector from the PCB.

5.Remove four (4) Phillips screws from PCB; remove board from base.

6.Reassemble with new board. Be sure six (6) blue-capped leads and white 5-pin connector are connected securely in their proper positions. Replace base cover.

CONTROL PCB BOARD REPLACEMENT

The control board regulates the light, timer and power on/off button. It is located in the cradle.

1.Unplug the waffle baker.

2.Remove the base; see Component Access.

3.Remove one Phillips screw from the ferrite bead fastener. Then remove the white, 5-pin connector from the power PCB. This will allow for easy access to the control PCB.

4.Remove the timer adjustment knob; see Timer Adjustment Knob Replacement instructions.

5.Remove the start and reset buttons; see Button Replacement instructions.

6.Remove the control PCB from the cradle. Remove (4) four Phillips screws from the control PCB plastic cover.

7.Remove three (3) white pin connectors from bottom of control board; two (2), 2-pin connectors and one (1), 5-pin connector.

8.Replace the old control PCB with the new control PCB. Be sure three white (3) pin connectors are connected securely to board; two (2), 2-pin connectors and one (1), 5-pin connector.

9.Reassemble with new control PCB board to the plastic cover with 4 Phillips screws. Slide control board into cradle.

10.Reassemble the timer adjustment knob; see Timer Adjustment Knob Replacement instructions.

11.Insert button shaft through bezel hole. Be sure spring is between button top and outer bezel. (See Figure 6)

Figure 6

12.Slide button cover over shaft. Add a small drop of super glue or solder into the cover hole. (See Figure 7)

Figure 7

13.Be sure the timer start and timer reset button covers align with contact points on control board.

14.Be sure the LED lens and digital display line up with holes in bezel.

15.Using thumbs, press control PCB board until it clamps securely into cradle.

16.Reassemble the ferrite bead fastener with one Phillips screw. Be sure 5-pin connector is securely connected to power supply PCB. Reassemble base to cradle.

Button Replacement

There are three (3) push buttons on the control bezel: power on/off, timer start and timer reset:

1.Unplug the waffle baker.

2.Remove the base; see Component Access.

3.Remove one screw from the ferrite bead fastener.

2.Using thumbs, push down on control PCB board (located in cradle arm) until clamps release.(See Figure 1)

3.Place tape over button front. This will help prevent losing the button’s small spring.

4.Reach inside the waffle baker cradle and grasp the button cover sleeve with needle nose pliers. Pull straight back to release the sleeve.

5.Remove tape and pull out button cover and shaft from bezel, being careful not to lose small spring.

6.Insert new button shaft through bezel hole. Be sure spring is between button top and outer bezel. (See Figure 6)

7.Slide button cover over shaft. Add a small drop of super glue or solder into the cover hole. (See Figure 7)

8.Be sure button cover lines up with contact point on control PCB board.

9.Using thumbs, press control PCB board until it clamps securely into cradle. Reassemble.

10.Check each button and the timer adjustment knob to make sure each works properly.

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