Maytag MED5920TW0 Parts Diagram

TECH SHEET - DO NOT DISCARD			PAGE 1

WARNING

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or

electrical shock.

IMPORTANT

Electrostatic Discharge (ESD)

Sensitive Electronics

Do not open package until it is time to install the electronic board.

ESD problems are present everywhere. ESD may damage or weaken the electronic board. The new board may appear to work well after repair is finished, but failure may occur at a later date due to ESD stress.

■Use an anti-static wrist strap. Connect wrist strap to green ground connection point or unpainted metal in the appliance

-OR-

Touch your finger repeatedly to a green ground connection point or unpainted metal in the appliance.

■Before removing the part from its package, touch the anti-static bag to a green ground connection point or unpainted metal in the appliance.

■Avoid touching electronic parts or terminal contacts; handle electronic board by edges only.

■When repackaging failed electronic board in anti-static bag, observe above instructions.

DIAGNOSTIC GUIDE

Before servicing, check the following:

■Make sure there is power at the wall outlet.

■Has a household fuse blown or circuit breaker tripped? Time delay fuse?

■Is dryer vent properly installed and clear of lint or obstructions?

■All tests/checks should be made with a VOM (volt-ohm-milliammeter) or DVM (digital-voltmeter) having a sensitivity of 20,000 Ω per volt DC or greater.

■Check all connections before replacing components. Look for broken or loose wires, failed terminals, or wires not pressed into connectors far enough.

■A potential cause of a control not functioning is corrosion on connections. Observe connections and check for continuity with an ohmmeter.

■Connectors: Look at top of connector. Check for broken or loose wires. Check for wires not pressed into connector far enough to engage metal barbs.

■Resistance checks must be made with dryer unplugged or power disconnected.

LESS DRY TEST

Begin with a fully assembled, empty dryer with clean lint screen. Be sure dryer is connected to a known good power source.

1.Set the following configuration:

■Door - must be closed

■Timer - Less Dry

■Temperature switch - High

■End of Cycle Signal switch - On

2.Press the Push to Start (PTS) switch. After approximately 16 seconds, the Timer will start to advance to the Off position. If this function does not occur, proceed to the Diagnostic Test.

DIAGNOSTIC TEST

This diagnostic test allows factory/service personnel to test and verify all inputs to the electronic control. The basic operation of this test is to notify the operator with an audible beep every time the status of an input to the control changes state.

This test is performed with a fully assembled dryer, connected to a known good power source.

Activating the Test Mode

1.Set the following configuration:

■Door - must be open

■Temperature switch - Air Fluff

■End of Cycle Signal switch - On

■Timer - Timed Drying or Sensor Drying selection

2.Turn the Wrinkle Prevent switch from Off to On three times within a five second period. A single beep, a pause, then a single beep will sound to indicate that the test mode is activated.

NOTE: If any of these initial conditions are not satisfied, the control will not enter the test mode.

Test Mode Functionality

When the control is in test mode, every input change of state will result in an audible beep (with the exception of the End of Cycle Signal switch). This includes:

■Door switch

■Moisture Sensor (short/open Sensor will result in a beep)

NOTE: A moistened finger or damp cloth may also be used.

■Temperature switch

■Wrinkle Prevent switch

■Push to Start (PTS) switch (with the door switch closed)

■Timer (any cam input change will result in a beep)

NOTE: Timer will advance during test.

If any of the inputs do not result in a beep, proceed to the corresponding component tests, beginning on page 4.

FOR SERVICE TECHNICIAN’S USE ONLY

PART NO. W10114943A

PAGE 2 TECH SHEET - DO NOT DISCARD

Electric Dryer Wiring Diagram

L1 LINE – BK

R – LINE L2

240 VOLTS

W – NEUTRAL

DRUM LAMP

120 VOLTS

NEUTRAL

BK

W TERMINAL

BK

DL

OR

LINKED TO

R

TIMER

ELECTRONIC CONTROL

CABINET

BK

W

BK

PT-1

TIMER

DOOR

P2-6

BU

BU

DOOR

W

R

BU

P1-1

P2-5

SWITCH

R

MTR

MOIST

G-Y

W

GND

V

P1-2

SENSOR

TCO

T2

P2-4

MOIST.

Y-R

G-Y

310°F

R

P1-3

R

W-R

(154°C)

T3

P2-3

TEMP.

W

P1-4

T4

MODEL

THERMISTOR

BU

P2-1

W

10 kΩ

NEUTRAL

BU

WRINKLE

W

5M

2M

COM HEATER

P3-8

GY

PREVENT

R-W

WPREVENT

1

4

MAIN

CENTRIFUGAL SWITCH

RELAY

P3-1

BU

BU

R-W

48 VDC

FABRIC

2.4–3.6

HEATER HI

P3-7

T

5

START

3

THERMAL FUSE

R-W

FS-1

2.4–3.8

NO

HEATER

P3-6

V

2

4

196 °F (91°C)

3M

6M

1M

BK

FS-2

BU

P3-2 LOW

P3-5

OR

1

DRIVE MOTOR

PK-BK

FS-3

1/3 H.P.

NO MOTOR

RELAY

48 VDC

T-W 1 SIGNAL

P2-7

LOUD

P3-4

4

PTS

COM

MOTOR

BU

BU-BK

PK-BK

START

R

BK

P1-5

START

P4-4

MODEL

SENSE

P4-3

MODEL

P4-2

R-W

120 VAC RLY DR.

BU

L1-RTN

P4-1

5400 WATT

R-W

NC

2700 WATT

BR

EACH LEG

HEATER RELAY BR

BR

HIGH LIMIT

	BR	THERMOSTAT
		180°F (82°C)
	AC COIL

<![if ! IE]> <![endif]>7	<![if ! IE]> <![endif]>PT-1
<![if ! IE]> <![endif]>4
<![if ! IE]> <![endif]>PS02
<![if ! IE]> <![endif]>1
<![if ! IE]> <![endif]>8
<![if ! IE]> <![endif]>PS03
<![if ! IE]> <![endif]>5
	<![if ! IE]> <![endif]>1
<![if ! IE]> <![endif]>1	<![if ! IE]> <![endif]>PS01
	<![if ! IE]> <![endif]>5
	PS04
4	1

Electronic Control Assembly

Contacts

Function 1M 2M 3M 5M 6M

Start

Run

= Contacts closed

Centrifugal Switch (Motor)

	Blue	Drum Size:			Drum Speed:
	Pink-	7 cubic feet			48 ± 3 RPM CW
	Black
	Pink-			Start Winding
					Main Winding
	Black
	Blue	Black	Blue	Violet	White	Green-
	Motor Relay					Yellow
	Red-White	Red				Red
	Red-
	White
	Red-
	White
		Pluggable Drive Motor Switch
	Red-White
	D.C. Heater Relay	Timer	BU	BK	R	V	W
		Wire Colors	Blue	Black	Red	Violet	White
	Brown		R	B	B
				K	U
	Brown	PT-1	W			<![if ! IE]> <![endif]>DATE	V
	Brown
	Brown
	A.C. Heater Relay			Timer

PART NO. W10114943A

FOR SERVICE TECHNICIAN’S USE ONLY

TECH SHEET - DO NOT DISCARD PAGE 3

MOTOR STRIP CIRCUIT

L1 LINE – BK					240 VOLTS					R – LINE L2
					120 VOLTS	W – NEUTRAL				NEUTRAL
	TIMER									TERMINAL
		ELECTRONIC CONTROL								LINKED TO
									W	CABINET
	BK
BK		PT-1	TIMER	P2-6		BU	BU	DOOR		W
				DOOR
								SWITCH
	BU	P1-1	MTR
							W
BU		P3-2	HEATER
BK	BU		LOW
	BU
	NO MOTOR	PK-BK
	RELAY							5M		2M
		P2-7							CENTRIFUGAL SWITCH
PTS	COM		MOTOR				MAIN
		PK-BK	START		BU	BU	2.4–3.6
	BU
					THERMAL FUSE		START
BK	BU-BK	P1-5	START				2.4–3.8
			SENSE		196 °F (91°C)		3M	6M		1M

	BU	DRIVE MOTOR
		1/3 H.P.

HEATER STRIP CIRCUIT

L1 LINE – BK

R – LINE L2

240 VOLTS

120 VOLTS

W – NEUTRAL

NEUTRAL

ELECTRONIC CONTROL

TERMINAL

THERMISTOR

LINKED TO

CABINET

THERMAL

TEMP.

P2-3

R

10 kΩ

W-R

CUT-OFF

(TCO)

P2-1

W

310 °F (154°C)

NEUTRAL

5M

2M

CENTRIFUGAL SWITCH

R-W

HEATER

48 VDC

RELAY

COM

P3-1

HEATER

120 VAC P4-2

R-W

HI

RLY DR

3M

6M

1M

P3-2

HEATER

L1-RTN

P4-1

NO

R-W

LOW

R-W

NC

BR

HEATER RELAY

BR

5400 WATT

R

2700 WATT

HIGH LIMIT

BR

EACH LEG

THERMOSTAT

AC COIL

BR

180°F (82°C)

MOISTURE SENSOR STRIP CIRCUIT

L1 LINE – BK

							120 VOLTS	W – NEUTRAL
								NEUTRAL
								TERMINAL
								LINKED TO
	TIMER	ELECTRONIC CONTROL						CABINET
BK	BK	PT-1	TIMER
	BU	P1-1	MTR	MOIST P2-5		G-Y
				GND
							SENSOR
					P2-4	Y-R
				MOIST.			G-Y
	BU			NEUTRAL	P2-1	W

FOR SERVICE TECHNICIAN’S USE ONLY

PART NO. W10114943A