-20-
CAUTIONS
1. DISCONNECT THE POWER SUPPLY CORD FROM THE OUTLET WHENEVER REMOVING THE OUTER CASE
FROM THE UNIT. PROCEED WITH THE TEST ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITOR
AND REMOVING THE LEAD WIRES FROM THE INVERTER MODULE.
2. ALL OPERATIONAL CHECKS WITH MICROWAVE ENERGY MUST BE DONE WITH A LOAD (1 LITER OF
WATER IN CONTAINER) IN THE OVEN.
COMPONENTS
TEST PROCEDURE
RESULTS
INVERTER
(Lead wires removed)
MAGNETRON
(Lead wires removed)
Note: Do not try to repair the inverter board, nor try
to make any adjustments to the board.
Check wiring to the inverter:
1. Unplug the oven’s main power supply.
2. Visually inspect 4 connectors on the inverter
board: CN701, CN702, CN703, E701 to see
whether there are any signs of failure due to
loose wires, bad crimping, sign of overheating,
etc.
1. Measure the resistance.
(Ohm-meter scale: Rx1)
• Filament terminal
2. Measure the resistance.
(Ohm-meter scale: Rx1000)
• Filament to chassis
Normal: Less than 1 ohm
Normal: Infinite
CN702
CN703
E701
CN701
120V AC
Heat Sink
Control Signal
In/Out
High Voltage
Output to
Magnetron
11. TEST AND CHECKOUT PROCEDURES, AND TROUBLESHOOTING
A. TEST PROCEDURES
Содержание LRMM1430SB
Страница 8: ...6 OVERALL CIRCUIT DIAGRAM A SCHEMATIC DIAGRAM 7 Figure 3 ...
Страница 9: ...B MATRIX CIRCUIT FOR TOUCH KEY BOARD 8 Figure 4 ...
Страница 32: ... 31 INTRODUCTION EXPLODED VIEW ...
Страница 33: ... 32 DOOR PARTS 14970A 14026A WTP002 13806A 13213A 13552A 13536A 13581A 268711 WTP002 23506A 13551A 15006A ...
Страница 34: ... 33 CONTROLLER PARTS 268711 WTP002 23506A 13551A ...
Страница 36: ... 35 LATCH BOARD PARTS WSZ085 43500A 466001 43501A 466003 466001 ...
Страница 37: ... 36 OVEN INTERIOR PARTS WTT028 WTT021 54974T 56501A 56930V 56912B 43500A 56324A WSZ002 ...
Страница 43: ... 42 SCHEMATIC DIAGRAM OF P C B ...
Страница 44: ... 43 PRINTED CIRCUIT BOARD KEY PCB MAIN PCB ...
Страница 48: ...P NO 3828W5S3066 May 2003 Printed in Korea ...