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(TROUBLE 2) Digital readout display does not show programming, even if the membrane keyboard
is programmed by touching proper pads.
Condition
Display does not
show programming
at all,even if
keyboard is
touched
NOTE: Before following the particular steps listed above in the trouble shooting guide for the
membrane keyboard, failure, please check for the continuity of each wire-harness between
the membrane keyboard and control box assembly.
MEMBRANE KEYBOARD CHECK PROCEDURE
1. Check the pad
A
B
C
D
E
F
G
H
I
J
K
PCB Termination
PCB Connector
35
Check
Check each pad for
continuity of the
membrane keyboard
for the following
keyboard check
procedure
1
2
3
4
5
6
7
8
9
10
11
Result
Normal
Abnormal
DEFROST
COOK
CLOCK
DEFROST
COOK
1
2
3
4
5
6
7
8
9
0
STOP/CLEAR
START
MFM-6D
Fig. 7
Cause
Malfunction
of touch
control
circuity of
control box
sub-assembly
Malfunction
of the memb-
rane keyboard
Defront
Cook
(Low)
(Med)
AM
PM
Defrost
(Low)
Porozen
Beremeo
Reg Lag
JI-811 F3A
Frozem
Pizea
To Cook:
1. Selet Power Level
or Preset from above
2. Enter cooking Time
(excopt for pecects)
3. Press Stait
Time
1
Alarm
4
Am/Pm
7
Stop
Alarm
Clear
Stop
MFM-7DTP
Remedy
Replace
control
box sub-
assembly
Replace the
membrane
keyboard
Cook
(High) Lock
Time
No
Or Alam On
Cook
Cook
(Med)
(High)
Quick On
Soup
30 Seca
Baked
Dinner
Potato
Plate
To Set Time/Alam:
1. Press Time or Alarm
2. Enter desirad time
3. Select AM or PM
4. Prem Time or Alam
5. To shut off alam
Press Alarm Stop
2
3
5
6
8
9
0
Start
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