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.
Runs
Runs
0
120
0
120
120V
Replace
circuit board
Normal
circuit board
Normal
resistance
V
oltage
incorrect
Correct
connections
Runs
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
BL
WH
