Service Manual

3-6
n
27” Stacked Laundry Center
TESTING – WASHER
For Service Technician Use Only
MAIN CONTROL BOARD (FIGURE 1)
MAIN CONTROL BOARD CONNECTORS AND PINOUTS (FIGURE 2)
3$*(
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
WASHER TROUBLESHOOTING TESTS
TEST #1: Main Control
This test checks for incoming and outgoing supplies
to and from the main control. This test assumes
that proper voltage is present at the outlet.
1. Unplug washer/dryer or disconnect power.
2. Remove console to access main control.
3. Verify that ALL connectors are inserted
all the way into the main control.
4. Plug in washer/dryer or reconnect power.
5. With a voltmeter set to AC, connect black
probe to J5-2 (Neutral) and red probe to J5-1 (L1).
¾If 120VAC is present, go to step 6.
¾If 120VAC is not present, check the AC
power cord and power harness for continuity
(See Figure 9).
Main Control Board Connectors & Pinouts (Figure 3)
J12-4 GRY –5VDC (CIRCUIT GND)
J12-3 BLU SHIFTER POSITION INPUT
J12-2 PNK RPM INPUT
J12-1 BLK +12VDC
J9-8 OPEN
J9-7 OPEN
J9-6 OPEN
J9-5 BLU COLD VALVE (N)
J9-4 BK/W COMMON (L1)
J9-3 OPEN
J9-2 OPEN
J9-1 RED HOT VALVE (N)
J5-2 BLK NEUTRAL
J5-1 BLK L1
J12
J9
J5
J3
J2
J6
SHIFTERVALVES
POWER
HARNESS
ROTARY ENCODERS
LID LOCK
DRAIN MOTOR
J3-6 BLK ROW 2
J3-5 BLK ROW 3
J3-4 BLK COLUMN 0
J3-3 RED COLUMN 1
J3-2 RED COLUMN 2
J3-1 RED COLUMN 3
J6-3 RED LOCK SWITCH
J6-2 WHT L1
J6-1 BLU LID SWITCH/LOCK SOLENOID
J2-6 RED MOTOR CW WINDING (N)
J2-5 ORN MOTOR CCW WINDING (N)
J2-4 BK/W MOTOR (L1 COMMON)
J2-3 LT BLU DRAIN PUMP MOTOR (N)
J2-2 BK/W L1 COMMON
J2-1 BRN SHIFTER MOTOR (N)
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6. Is the “Diagnostic LED” ON or OFF?
(See Figure 3 below for LED location.)
¾ON: (+5VDC present) continue to step 7.
¾OFF: (+5VDC missing) proceed to step 8.
7. With a voltmeter set to DC, connect black
probe to J12-4 (Circuit Gnd) and red probe to
J12-1 (+12VDC).
¾If +12VDC is present, main control
supplies are good.
¾If +12VDC is not present, go to step 8.
8. Check if shifter assembly is affecting the
main control DC supplies.
a. Unplug washer/dryer or disconnect power.
b. Remove connector J12 from main control.
c. Plug in washer/dryer or reconnect power.
d. Repeat steps 6 and 7. Perform the +12VDC
check inside header J12 on the board – do not
short pins together.
e
J12 Shifter
e
J9 Valves
e
J5 Power Harness
e
J3 Rotary
Encoders
e
J6 Lid
Lock
J2 Drain/
Motor
e
e
e = represents
pin 1
Diagnostic LED
3$*(
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
WASHER TROUBLESHOOTING TESTS
TEST #1: Main Control
This test checks for incoming and outgoing supplies
to and from the main control. This test assumes
that proper voltage is present at the outlet.
1. Unplug washer/dryer or disconnect power.
2. Remove console to access main control.
3. Verify that ALL connectors are inserted
all the way into the main control.
4. Plug in washer/dryer or reconnect power.
5. With a voltmeter set to AC, connect black
probe to J5-2 (Neutral) and red probe to J5-1 (L1).
¾If 120VAC is present, go to step 6.
¾If 120VAC is not present, check the AC
power cord and power harness for continuity
(See Figure 9).
Main Control Board Connectors & Pinouts (Figure 3)
J12-4 GRY –5VDC (CIRCUIT GND)
J12-3 BLU SHIFTER POSITION INPUT
J12-2 PNK RPM INPUT
J12-1 BLK +12VDC
J9-8 OPEN
J9-7 OPEN
J9-6 OPEN
J9-5 BLU COLD VALVE (N)
J9-4 BK/W COMMON (L1)
J9-3 OPEN
J9-2 OPEN
J9-1 RED HOT VALVE (N)
J5-2 BLK NEUTRAL
J5-1 BLK L1
J12
J9
J5
J3
J2
J6
SHIFTERVALVES
POWER
HARNESS
ROTARY ENCODERS
LID LOCK
DRAIN MOTOR
J3-6 BLK ROW 2
J3-5 BLK ROW 3
J3-4 BLK COLUMN 0
J3-3 RED COLUMN 1
J3-2 RED COLUMN 2
J3-1 RED COLUMN 3
J6-3 RED LOCK SWITCH
J6-2 WHT L1
J6-1 BLU LID SWITCH/LOCK SOLENOID
J2-6 RED MOTOR CW WINDING (N)
J2-5 ORN MOTOR CCW WINDING (N)
J2-4 BK/W MOTOR (L1 COMMON)
J2-3 LT BLU DRAIN PUMP MOTOR (N)
J2-2 BK/W L1 COMMON
J2-1 BRN SHIFTER MOTOR (N)
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6. Is the “Diagnostic LED” ON or OFF?
(See Figure 3 below for LED location.)
¾ON: (+5VDC present) continue to step 7.
¾OFF: (+5VDC missing) proceed to step 8.
7. With a voltmeter set to DC, connect black
probe to J12-4 (Circuit Gnd) and red probe to
J12-1 (+12VDC).
¾If +12VDC is present, main control
supplies are good.
¾If +12VDC is not present, go to step 8.
8. Check if shifter assembly is affecting the
main control DC supplies.
a. Unplug washer/dryer or disconnect power.
b. Remove connector J12 from main control.
c. Plug in washer/dryer or reconnect power.
d. Repeat steps 6 and 7. Perform the +12VDC
check inside header J12 on the board – do not
short pins together.
e
J12 Shifter
e
J9 Valves
e
J5 Power Harness
e
J3 Rotary
Encoders
e
J6 Lid
Lock
J2 Drain/
Motor
e
e
e = represents
pin 1
Diagnostic LED
J12 Shifter
J3 Rotary
Encoders
J9 Valves
Diagnostic LED
J6 Lid
Lock
J2 Drain/
Motor
J5 Power Harness