7-18
COMPONENTS TEST
PROCEDURES
RESULTS
RELAY2
Check for continuity of relay 7 with an
ohm-meter.
(Remove wire leads from relay 7 and
operate the unit.)
POWER
LEVEL
1
2
3
4
5
6
7
8
9
10
4 sec
6 sec
8 sec
10 sec
12 sec
14 sec
16 sec
18 sec
20 sec
22 sec
18 sec
16 sec
14 sec
12 sec
10 sec
8 sec
6 sec
4 sec
2 sec
0
Figure 28
Relay 2
NOTES:
• A MICROWAVE ENERGY TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR
• MAKE SURE THE WIRE LEADS ARE IN THE CORRECT POSITION.
• WHEN REMOVING THE WIRE LEADS FROM THE PARTS, BE SURE TO GRASP THE CONNECTOR, NOT
THE WIRES.
B. CHECKOUT PROCEDURES
(1) CHECKOUT PROCEDURES FOR FUSE BLOWING
CAUTION:
REPLACE BLOWN FUSE WITH 20 AMPERE FUSE.
NOTES:
• If the fuse is blown by an improper switch operation, replace all switches and the fuse at the same time.
After replacing the defective switches with new ones, make sure that they are correctly connected.
• Check for microwave energy leakage according to INTERLOCK ADJUSTMENT PROCEDURES on page 7-12
when the primary interlock, secondary interlock switches and/or the interlock monitor switches are adjusted or
replaced.
PROBLEMS CAUSES
Fuse blows immediately after the door is closed.
Fuse blows immediately after the door is opened.
Fuse blows when the door is closed and START key
is touched.
Improper operation of the primary interlock, secondary
interlock switches and/or the interlock monitor switch.
Malfunction of the high voltage transformer; the high
voltage capacitor including the diode, the magnetron,
the blower motor or the circuit board.
Summary of Contents for MVH1615WW
Page 9: ...5 1 OVERALL CIRCUIT DIAGRAM SCHEMATIC DIAGRAM ...
Page 10: ...5 2 MATRIX CIRCUIT FOR TOUCH KEY BOARD ...
Page 37: ...8 2 CONTROLLER PARTS 268711 24810P 23572A 23506A 24781M WTP018 07 1 07 2 EV ...
Page 39: ...8 4 LATCH BOARD PARTS WSZ085 43500A 466001 466003 466001 44510A EV ...
Page 43: ......
