Control Circuit Board - Sanyo EM-C1900 Service Manual

B. TROUBLESHOOTING
CONDITION
Power with normal
voltage is applied. Place
a cup of water inside
microwave oven
" "," 1 "," 0 "," 0 "
and " " keys
are touched.
* Note:Oven will not accept settings of 60 through to 99 seconds.
TIME must be entered as 1 minute and 39 seconds for 99 seconds.
TROUBLE
Fuse(10A) blows off
immediately
No display cook-
ing time
Cooking operation
will not start
CHECK RESULT
S t e p d o w n
Transformer
H.V Capacitor
H.V Diode
Connection of
FPC from Touch
key board
Power circuit
board
(See page 7)
Touch key
board
(See page 6)
Control circuit
board
(See page 7)
Door sensing
switch
(See page 6)
Interlock switch
(See page 6)
Control
circuit board
(See pages 7 & 25)
- 8 -
REMEDY
Replace
Shorted
Replace
Shorted
Replace
Shorted
Incorrect Reconnect
Replace
Voltage
incorrect
Resistance Replace
incorrect
Voltage Replace
incorrect
No continuty Replace
No continuty Replace
Voltage Replace
incorrect