Amana RFS12SW2C User manual

삼흥
정판
Microwave Oven
Service Manual
RFS12SW2C
CAUTION
BEFORE SERVICING THE UNIT, READ THE
SAFETY PRECAUTIONS IN THIS MANUAL.

SAFETY PRECAUTIONS
This device is to be serviced only by properly qualified service personnel.
Consult the service manual for proper service procedures to assure continued safety operation and for precautions to be
taken to avoid possible exposure to excessive microwave energy.
PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID POSSIBLE
EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
A) Do not operate or allow the oven to be operated with the door open.
B) Make the following safety checks on all ovens to be serviced before activating the magnetron or other
microwave source, and make repairs as necessary; (1) interlock operation, (2) proper door closing, (3) seal
and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and latches,
(5) evidence of dropping or abuse.
C) Before turning on microwave power for any service test or inspection within the microwave generating
compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment,
integrity, and connections.
D) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation
and transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual
before the oven is released to the owner.
E) A microwave leakage check to verify compliance with the Federal Performance Standard should be
performed on each oven prior to release to the owner.
LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes

CONTENTS
(Page)
SAFETY PRECAUTIONS
--------------------------------------------------------------------- Inside front cover
SPECIFICATIONS
-----------------------------------------------------------------------------------------------------
1-1
CAUTIONS
-------------------------------------------------------------------------------------------------------------- 2-1
INSTALLATIONS
------------------------------------------------------------------------------------------------------ 3-1
OPERATING INSTRUCTIONS
------------------------------------------------------------------------------------ 4-1
FEATURES ------------------------------------------------------------------------------------------------------------------------ 4-1
CONTROL PANEL -------------------------------------------------------------------------------------------------------------- 4-1
COOKING DISPLAYS ---------------------------------------------------------------------------------------------------------
4-2
OPERATION
---------------------------------------------------------------------------------------------------------------------- 4-3
PROGRAMMING ---------------------------------------------------------------------------------------------------------------- 4-4
SCHEMATIC DIAGRAM ------------------------------------------------------------------------------------------------------
4-6
CIRCUIT DESCRIPTION
----------------------------------------------------------------------------------------------------- 4-7
SERVICE INFORMATION ------------------------------------------------------------------------------------------ 5-1
TOOLS AND MEASURING INSTRUMENTS
--------------------------------------------------------------------------- 5-1
MICROWAVE LEAKAGE TEST
-------------------------------------------------------------------------------------------- 5-1
MEASUREMENT OF MICROWAVE POWER OUTPUT
----------------------------------------------------------- 5-3
DISASSEMBLY AND ADJUSTMENT
------------------------------------------------------------------------------------- 5-3
INTERLOCK CONTINUITY TEST ------------------------------------------------------------------------------------------ 5-7
COMPONENT TEST PROCEDURE -------------------------------------------------------------------------------------- 5-8
TROUBLE SHOOTING
------------------------------------------------------------------------------------------------------ 5-11
EXPLODED VIEW ---------------------------------------------------------------------------------------------------- 6-1
Replacement Parts list
---------------------------------------------------------------------------------------------- 7-1
LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes

SPECIFICATIONS
1-1
This microwave oven is designed for commercial use only.
It is not recommended for buelt-in Installation.
DESCRIPTION
RFS12SW2C
120 V~ 60 Hz
2000 watt (18 A)
Single phase, 3 wire grounded
1200 watt full microwave power (IEC60705)
2450 MHz
2M246
0 ~ 60 min.
213/4” (W) x 141/4” (H) x 177/8” (D)
141/4” (W) x 87/8” (H) x 163/8” (D)
64 lbs (approx.)
71 lbs (approx.)
Touch Control System
Clock : 00 ~ 60
Microwave Power for Variable Cooking
Power level
HIGH ............................... Full power throughout the cooking time
70% (Med.-High) ............. approx. 70% of Full power
50% (Med.-Low) .............. approx. 50% of Full power
20% (Low) ....................... approx. 20% of Full power
Time chart
ITEM
MODEL
Power Requiremen
Power Output
Microwave Frequency
Magnetron
Timer
Outside Dimensions
Cavity Dimensions
Net Weight
Shipping weight
Control Complement
Rating Label Location
Accessories
LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes

CAUTIONS
2-1
• DO NOT operate on a 2-wire extension cord during
repair and use.
• NEVER TOUCH any oven components or wiring during
operation.
• BEFORE TOUCHING any parts of the oven, always
remove the power plug from the outlet.
• For about 30 seconds after the oven stops, an electric
charge remains in the high voltage capacitor. When
replacing or checking, you must discharge the high
voltage capacitor by shorting across the two terminals
with an insulated screwdriver.
• Remove your watches whenever working close to or
replacing the Magnetron.
• DO NOT touch any parts of the control panel circuit. A
resulting static electric discharge may damage this
P.C.B.
• NEVER operate the oven with no load.
• NEVER injure the door seal and front plate of the oven
cavity.
• NEVER put iron tools on the magnetron.
• NEVER put anything into the latch hole and the
interlock switches area.
• Proper operation of the microwave oven requires that
the magnetron be assembled to the waveguide and
cavity. Never operate the magnetron unless it is
properly installed.
• Be sure that the magnetron gasket is properly
installed around the dome of the tube whenever
installing the magnetron.
Unlike other appliances, the microwave oven is
high-voltage and high-current equipment.
Though it is free from danger in ordinary use,
extreme care should be taken during repair.
THE OVEN IS TO BE SERVICED ONLY
BY PROPERLY QUALIFIED SERVICE
PERSONNEL.
MICROWAVE RADIATION
Personnel should not be exposed to the
microwave energy which may radiate from the
magnetron or other microwave generating
device if it is improperly used or connection.
All input and output microwave connections,
waveguide, flange, and gasket must be secure
never operate the device without a microwave
energy absorbing load attached.
Never look into an open waveguide or antenna
while the device is energized.
Gasket
ANTENNA
COOLING FIN
FILAMENT
TERMINALS
MAGNETRON
CHASSIS GROUND
MAGNETRON
LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes

INSTALLATION
3-1
INSTALLING
1. Empty the microwave oven and clean inside it with a
soft, damp cloth. Check for damage such as
misaligned door, damage around the door or dents
inside the cavity or on the exterior.
2. Put the oven on a counter, table, or shelf that is strong
enough to hold the oven and the food and utensils you
put in it. (The control panel side of the oven is the
heavy side. Use care when handling.)
3. Do not block the vent and the air intake openings.
Blocking vent or air intake openings can cause
damage to the oven and poor cooking results. Make
sure the microwave oven legs are in place to ensure
proper air flow.
4. The oven should not be installed in any area where
heat and steam are generated, because they may
damage the electronic or mechanical parts of the unit.
Do not install the oven next to a conventional surface
unit or above a conventional wall oven.
5. Use microwave oven in an ambient temperature less
than 104˚F(40˚C).
6. Place the microwave oven as far away as possible
from TV, RADIO, COMPUTER, etc., to prevent
interference.
7. Place the microwave oven on a stardy and flat surface.
A - Allow at least 11/2inches (3.81 centimeters) of
clearance around top and sides of equipment.
Proper air flow around equipment cools electrical
components. With restricted air flow, oven may not
operate properly and life of electrical parts is
reduced.
B - Allow at least 3 inches from door front to edge of
countertop to avoid accidental tipping of oven.
GROUNDING INSTRUCTIONS
For personal safety, this appliance must be fully
grounded at all times.
In the event of an electrical short circuit, grounding
reduces the risk of electrical shock.
The plug must be plugged into an outlet that is
properly installed and grounded.
BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY.
WARNING
Improper use of the grounding plug can result in a
risk of electric shock.
Do not, under any circumstances, cut or remove
the third ground prong from the power cord plug.
A
A
A
B
PREFERRED METHOD
ENSURE PROPER GROUND
EXISTS BEFORE USE

4-1
OPERATING INSTRUCTIONS
FEATURES
CONTROL PANEL Display
Some items in display can be seen but will not glow.
Pads
Window Door Screen
Electronic Control
Safety Door Lock System
TIME ENTRY
Pads 1-0
HOLD 0%,
DEFROST 20%
MEDUIM 50%,
MED-HI 70%
STOP/RESET
START
Use to enter heating time without changing
preprogrammed number pads.
Use to begin heating with preprogrammed
times and power levels or to enter times for
“Manual Time Entry” cooking.
Use to select power level. Oven can heat at
full or reduced power. If oven power level is
set to 0% oven does not heat for
programmed time. If no power level is
selected, oven operates at 100% power.
Use to exit programming mode and stop
cooking during cooking cycle.
Use to start “Manual Time Entry” program
or restart interrupted cooking cycle. Use to
advance to next user option. Use to save
times and power levels when programming
pads.

Cooking Cooking Displays
Shows when power is connected to oven. Open and close
door to clear.
READY shows when oven control will accept entries.
Appears after oven door is opened and closed.
33:33 shows heating time. When more than 1 heating stage is
programmed, total time for all stages displays.
COOK shows when oven is operating.
20 indicates the microwave power level used. If power level
does not show, oven is heating at 100% power.
4-2
Programming Displays
Indicates programming mode. See “Programming” section of
manual for programming procedure.
Indicates programming user options mode. See “User
Options” section of manual for programming procedure.

Interrupting Operation
• Open oven door to interrupt operation. Oven fan
continues to operate. Close door and press START
pad to resume oven operation.
• Press STOP/RESET pad to interrupt operation.
Display continues to show countdown time. Press
START pad to resume oven operation and
countdown timing.
Canceling Mistakes
• If oven is operating,press STOP/RESET pad once to
stop oven, then again to clear display.
• If oven door is open and time shows in display, close
oven door and press STOP/RESET pad to clear
display.
Operating Preprogrammed Pads
Oven has 10 ~20 preprogrammed number pads.
Instructions are written for factory programmed ovens.
Ovens that are reprogrammed can respond differently
than described below.
1. Open oven door , place food in oven, and close
oven door
• If pad is not pressed in 30 seconds, open and
close oven door again.
2. Press desired number pad.
• Oven operates and time counts down.
3. Oven stops heating and oven signal sounds when
heating timing elapses.
Operating QTY 2X Pads
1. Press Pad.
2. Press desired number pad
• Example : press + = 18 sec.
Preprogrammed Times and Cook Level
All preprogrammed pads arrive set at full power.
Manual Time Entry
Manual Time Entry feature allows the operator to
enter time and power levels, and heat without
changing the preprogrammed pads.
1. Open oven door, place food in oven, and close
door.
• Display shows "READY".
• If pad is not pressed in 30 seconds, open and
close oven door again.
2. Press TIME ENTRY pad.
• Display shows "00:00".
3. Press number pads to nter desired cooking time.
• For example, to heat for 2 minutes 30 seconds,
press 2, 3, and 0 pads.
4. Press desired power level pad to change power level.
• If a power level pad is not pressed, oven defaults
to 100% power.
• For xample, pressing MEDIUM 50% pad sets
oven to 50% power.
• Display shows current power level if other than
100 percent power.
5. Press START pad.
• Oven operates and time counts down.
6. Oven stops heating and oven signal sounds when
heating timing elapses.
4-3
Operation
CAUTION
To avoid fire, do not dry newspapers or clothes in
microwave oven.
Pads
1 10 sec.
2 20 sec.
3 30 sec.
4 45 sec.
5 1 min.
6 1:30 min.
7 2 min.
8 3 min.
9 4 min.
0 5 min.
Heating
Times
Pads
1 10 sec. 11 20 sec.
2 20 sec. 12 40 sec.
3 30 sec. 13 1 min.
4 45 sec. 14 1:30 min.
5 1 min. 15 2 min.
6 1:30 min. 16 3 min.
7 2 min. 17 4 min.
8 3 min. 18 6 min.
9 4 min. 19 8 min.
10 5 min. 20 10 min.
Heating
Times
Pads Heating
Times
Option: Single Digit Option: Double Digit

PROGRAMMING
Preprogrammed Number Pads
Oven has 10 preprogrammed number pads. Follow
instructions below to program heating times and
power levels for customized cooking.
1. Open oven door.
• If door is closed or STOP/RESET pad is pressed
before finishing programming sequence, oven
exits programming mode.
2. Press and hold pad 1 for approximately 5 seconds.
• After 5 seconds, signal sounds. Display shows
“PROGRAM” indicating program mode.
3. Press desired number pad.
• Display shows heating time, “COOK LEVEL” and
power level if other than 100 percent power.
4. Press number pads to enter desired cooking time.
• For example, to heat for 2 minutes 30 seconds,
press 2, 3, and 0 pads.
5.
Press desired power level pad to change power level.
• If a power level pad is not pressed, oven defaults
to 100% power.
• For example, pressing MEDIUM 50% pad sets
oven to 50% power.
• Display shows current power level if other than
100% power.
6. Press START pad to save new heating time and
power level in oven memory.
• Repeat step 3-6 to program additional pads.
7. Press STOP/RESET pad or close oven door to exit
programming mode.
Multiple Heating Stages
Follow instructions below to program oven to perform
3 consecutive heating cycles without interruption.
1. Open oven door.
• If door is closed or STOP/RESET pad is pressed
before finishing programming sequence, oven
exits programming mode.
2. Press pad 1 for approximately 5 seconds.
• After 5 seconds, signal sounds.
3. Press desired number pad.
• Display shows heating time and preprogrammed
number.
4. Press number pads to enter desired cooking time.
• For example, to heat for 2 minutes 30 seconds,
5. Press desired power level pad to change power
level.
• If a power level pad is not pressed, oven defaults
to 100% power.
• For example, pressing MEDIUM 50% pad sets
oven to 50% power.
• Display shows current power level if other than
100 percent power.
6. Press TIME ENTRY pad
• Display briefly shows “STAGE 2”. Then cook time
and power level for stage show in display.
• Repeat steps 5-6 to create additional stages.
7. Press START pad to save new heating time and
power level in oven memory.
8. Press STOP/RESET pad or close oven door to exit
programming mode.
4-4