7-18
(2) CHECKOUT PROCEDURES FOR RELAY.
- PROBLEM (A) -
FAN motor turns on without touching START key
when the door is closed.
Remove the mate connector of I/O
CON from the circuit board.
Does the unit still operate?
GOOD
Replace the
circuit board
Replace
Wire Assembly
- PROBLEM (B) -
FAN motor turns on When the door is closed and
START key is touched.
Measure the voltage at pin NO.
1, 5 of CN1
Voltage reading: 120 V AC
Replace the
circuit board
Defective
FAN motor
Defective
Wire Assembly
Replace
FAN motor.
NO
NO
YES
YES
NO
NO
YES
YES
GOOD
- PROBLEM (A) -
Oven lamp turns on without touching START key
when the door is closed.
Remove the mate connector of I/O
CON from the circuit board.
Does the unit still operate?
GOOD
Replace the
circuit board
Replace
Wire Assembly
- PROBLEM (B) -
Oven lamp turns on When the door is closed and
START key is touched.
Measure the voltage at pin NO.
1, 4 of CN1
Voltage reading: 120 V AC
Replace the
circuit board
Defective
Oven lamp
Defective
Wire Assembly
Replace
Oven lamp
NO
NO
YES
YES
NO
NO
YES
YES
GOOD
Summary of Contents for 721. 63762
Page 9: ...5 1 SCHEMATIC DIAGRAM OVERALL CIRCUIT DIAGRAM...
Page 10: ...5 2 MATRIX CIRCUIT FOR TOUCH KEY BOARD...
Page 37: ...8 2 CONTROLLER PARTS I 1001 W171 W171 2016 2009 2007 2017 EV...
Page 38: ...2004 2008 2002 2006 W106 2381 8 3 CONTROLLER PARTS II EV...
Page 40: ...8 5 LATCH BOARD PARTS 4000 W102 4001 4002 4003 4002 4004 EV...
Page 44: ...8 21 SCHEMATIC DIAGRAM OF P C B...
Page 45: ...8 22 PRINTED CIRCUIT BOARD...
