7-22
C. TROUBLE SHOOTING
Bef
ore following this troubleshooting read
“TRIAL OPERATION
” on page 6- 1.
•
“DISPLAY
” Problems,
“A
” thru
“C
”
•
“HELP UP
” Problems,
“D
” thru
“E
”
•
“BUZZER Problems,
“F
”
PROBLEM - A:
“PLEASE SET TIME OF DAY
” does not appear in display window when power supply cord is
plugged into wall outlet.
PROBLEM - B:
Display does not show correct numbers and/ or
correct indications when programmed.
Check: 1. POWER SUPPLY
2. FUSE (See
“CHECKOUT PROCEDURES FOR FUSE BLOWING: on page 7- 19)
3. OVEN CAVITY THERMOSTAT
1
1
Measure voltage between pin 1
and pin 3 of connector CN1.
0
120
120V
Replace
circuit board
Normal
circuit board
Normal
resistance
Voltage
incorrect
Correct
connections
0
120
BL
WH
Runs
Runs
Measure resistance of touch
key board after removing
connector S1.
(See page 7-5 and 7-18)
Normal
resistance
Resistance
incorrect
Replace touch
key board.
Normal touch
key board
Poor
contact
Correct
seating
Contact
ok
Replace
circuit board
Normal
circuit board
Normal
contact
Check contact
of connector S1
Runs
Runs
Runs
Summary of Contents for MMV5165AAB
Page 9: ...5 1 OVERALL CIRCUIT DIAGRAM SCHEMATIC DIAGRAM I Check the Model No THERMOSTAT...
Page 10: ...5 2 SCHEMATIC DIAGRAM II Check the Model No ADD Noise filter...
Page 11: ...5 3 MATRIX CIRCUIT FOR TOUCH KEY BOARD KEY MATRIX...
Page 41: ...8 4 4001 W111 W102 4000 4002 4003 4002 4004 LATCH BOARD PARTS EV...
Page 45: ...8 8 6008 W109 6011 6010 VINYL BAG 6009 INSTALLATION PARTS EV...
