1. Incomplete segments.
• Segment missing.
• Partial segment missing.
• Digit flickering (NOTE:Slight flickering is normal.)
2. Colon does not turn on or blink.
3. A distinct change in the brightness of one or more numbers in display.
4. One or more digits in the display are not lighting.
5. Display indicates a number different from one touched, for example, key in 5 and 3 appears in the display.
6. Specific numbers (for example 7 or 9) will not display when key pad is touched.
7. Display does not count down with time blinking or up with clock operation.
8. Display obviously jumps in time while counting down.
9. Display counts down too fast while cooking.
10. Each indicator light does not turn on after setting cooking cycle.
11. Display time of day does not reappear when cooking is finished.
12. Beep sound is not heard when correct key is touched.
5-12
(TROUBLE 1) The following visual conditions indicate a probable defective control circuit.
CONDITION
CHECK
RESULT
CAUSE
REMEDY
1. No input can be
programmed.
Continuity
No continuity
Defective PCB
assembly.
Loose
connection.
Replace PCB
assembly.
Connect them
tightly.
Check the conn-
ection between
membrane key
assembly and
PCB assembly.
2. Some inputs
cannot be
programmed.
3. Display shows a
number or figure
different from one
touched.
4. Random
programming
when touching
other pads.
5. Display is fixed
at some figure
and can not
accept any
input.
Everything works
as specified.
Still have trouble.
Defective key
membrane
assembly.
Defective PCB
assembly.
Replace key
membrane
assembly.
Replace PCB
assembly.
Replace key
membrane
assembly and
check operation.
Содержание MS-194A
Страница 9: ...SCHEMATIC DIAGRAM 4 3 ...
Страница 28: ...6 2 13581A 14970A 14026A 13552A 13536A 15006A 13213A 13720D 13352A DOOR PARTS ...
Страница 29: ...6 3 WTP018 26638A 23572A 23550D 24930D 24781M 268711 CONTROL PANEL PARTS ...
Страница 30: ...6 4 33052M 340511 33112U WTT021 34960A 34036W 36549S WTP013 33390G 35889A OVEN CAVITY PARTS ...
Страница 31: ...6 5 43501A 43500A 466001 WSZ085 466003 466002 44510A LATCH BOARD PARTS ...
Страница 33: ...6 7 56170D 63302A 63303A WTT021 WSZ002 65006B BASE PLATE PARTS ...
Страница 49: ...8 1 SCHEMATIC DIAGRAM OF P C B ...
Страница 50: ...8 2 PRINTED CIRCUIT BOARD ...