Contents
WARNING TO SERVICE PERSONNEL
TABLE OF CONTENTS
WARNING TO SERVICE PERSONNEL
MICROWAVE MEASUREMENT PROCEDURE
BEFORE SERVICING
Before Servicing
WARNING TO SERVICE PERSONNEL
After repairing
When the testing is completed
A. Requirements
MICROWAVE MEASUREMENT PROCEDURE
B. Preparation for testing
C. Leakage test
SERVICE MANUAL
DANGER
1440 Bridge Gate Dr Diamond Bar, CA
If provided, Vent Hood, Fan assembly, Cooling Fan Motor
MICROWAVE DRAWER SPECIFICATION
DESCRIPTION
GENERAL INFORMATION
GROUNDING INSTRUCTIONS
DESCRIPTION OF OPERATING SEQUENCE
POWER LEVEL P-0 TO P-90 COOKING
OPERATION
OFF CONDITION
MICROWAVE
SENSOR COOKING CONDITION
Cooking Sequence
DOOR
SCHEMATIC OFF CONDITION
CLOSED, COOK OFF CONDITTION
A TOUCH CONTROL PANEL ASSEMBLY TEST
TEST PROCEDURES
PROCEDURE
Before testing
C RELAY TEST
COMPONENT TEST
B KEY UNIT TEST
STEPS
Check supply voltage and oven power cord
DEFROST TEST
The rated AC voltage is not present between
Water load cooking test
TESTING METHOD FOR AH SENSOR AND/OR CONTROL UNIT
F AH SENSOR TEST Checking the initial sensor cooking condition
CHECKING CONTROL UNIT
R1, R2 22Ω ± 1% 1/2W R3 4.3kΩ ± 5% 1/4W R4 1MΩ ± 5% 1/4W
MICROWAVE OUTPUT POWER
Refer to the disassembly instructions found on Page
G MAGNETRON ASSEMBLY TEST
H THERMAL CUT-OUT TEST
K MONITOR SWITCH TEST
I SECONDARY INTERLOCK SWITCH TEST
J STOP SWITCH TEST
M POWER TRANSFORMER TEST
L BLOWN MONITOR FUSE TEST
4 Reset Circuit
TOUCH CONTROL PANEL ASSEMBLY
Control Unit and Power Unit
5 Indicator Circuit
Internal clock oscillation frequency setting input
DESCRIPTION OF LSI IC-1
Power source voltage 0V GND
Power source voltage +5V
Signal coming from touch key
Signal
Segment data signal
Signal similar to P23
Signal to sound buzzer
Magnetron high-voltage circuit driving signal
Common relay driving signal. Square Waveform 60Hz
Signal to synchronize LSI with commercial power source frequency
1 Structure of Humidity Sensor
HUMIDITY SENSOR CIRCUIT
ventilation opening for sensing
2 Operational Principle of Humidity Sensor
4. Other Precautions
TOUCH CONTROL PANEL SERVICING
1 Servicing the touch control panel with power supply of the oven
2. Servicing of Touch Control Panel
1. Employing lead-free solder
PRECAUTIONS FOR USING LEAD-FREE SOLDER
2. Using lead-free wire solder
3. Soldering
WARNING AGAINST HIGH VOLTAGE
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
WARNING FOR WIRING
To prevent an electric shock, take the following pre- cautions
MICROWAVE DRAWER DISASSEMBLY
Un-hook/Attach White AC Wire to Bottom Terminal
POWER CORD REPLACEMENT
Un-hook/Attach Black AC Wire to Top Terminal
Un-hook/Attach Ground to metal Tab on Back Plate
Re-install
STOP SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL
STOP SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT
After adjustment, check the following
DRAWER/SLIDE RAIL REMOVAL
DRAWER ASSEMBLY AND CHOKE REMOVAL
DRAWER SUPPORT ANGLE REMOVAL
1. Follow the Microwave Drawer disassembly as previously
ACTUATOR REMOVAL/ADJUSTMENT
SWITCH ANGLE REMOVAL/ADJUSTMENT
SWITCH ANGLE REMOVAL
Actuator adjustment
RACK GEAR REMOVAL
AUTO DRAWER GEAR REMOVAL/INSTALLATION
Bottom cover
Installation
HIGH VOLTAGE COMPONENTS
to Back Plate
FM A
Figure S-2. Power Unit Circuit
MICRO
CN-A
UNIT
UNIT
CONTROL
F G H
A B C D E F G H
Figure S-4. Printed Wiring Board of Power Unit
2.5A
5.PrintedWiringBoard
UnitControlof
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