LG MA840B Support Question
LG MA840B Support Question
Find answers below for this question about LG MA840B.Need a LG MA840B manual? We have 1 online manual for this item!
Question posted by patesimon on August 24th, 2011
How Do I Cook At 50% With The Goldstar Ma840b
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Related LG MA840B Manual Pages
Service Manual - Page 1
P/NO 3828VV5S3748
April, 2004 Printed in Korea GoldStar
Website http:llus.Igservice.com
MICROWAVE OVEN SERVICE MANUAL
MODEL: MA840B
CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Service Manual - Page 2
... and t,oaling surfaces (arcing, wear, and other damago)Toydamage to
hingosartd
latches, (5) evidence of dropping or abuse.
This device is to be serviced before the oven iz-rolcubed to the owner.
=
E) A microwave leakage check to verify complience-witIrthe-ft :laa:I=Ba
tmlmt should-b
performed on each...
Service Manual - Page 3
...
URES CONTROL PANEL OPERATING SEQUENCE SCHEMATIC DIAGRAM (I) SCHEMATIC DIAGRAM (II)
IRCUIT DESCRIPTION
Inside front cover 1-1 2-1 3-1 4 1 4-1 4 1 1-2
4-3
4-4 4-5
TOOLS AND MFASURING INSTRUMFNTS
5 1
MICROWAVE LEAKAGE TEST
5-1
MEASUHEMENT OF MICHOWAVE POWEH OUII-1UI
5-3
DISASSEMBLY AND ADJUSTMENT
5-3
INTERLOCK CONTINUITY TEST
5 7
URE
5 8
TROUBLE SHOOTING 14.-- 5-12
EXPLODED VIEW
6-1
Service Manual - Page 4
... Complement
Rating Label Location
DESCRIPTION
MA840B
120 Volts AC 60 Hz
1200 Watts (10.5A)
Single phase, 3 wire grounded
800 Watts full microwave power (IEC60705)
2450 MHz
2M214... 50%, 4 (Defrost)
approx. 40%
3 (Low)
approx. 30%, 2 (Simmer)
approx. 20%
1 (Warm)
approx. 10%
IM
Back side
Accessories
Owner's manual & cooking guide Glass turntable Roller Rest
This microwave oven...
Service Manual - Page 5
...; DO NOT touch any parts of the tube whenever installing the magnetron. A resulting static electric discharge may radiate from the magnetron or other appliances, the microwave oven is high-voltage and high-current equipment. ANTENNA
Gasket
FILAMENT TERMINALS --- Never look into the latch hole and the
interlock switches area. All input and...
Service Manual - Page 6
... grounded at least 10 cm(4 inches) from the power-Gerd plug. Put the oven nn counter, table, or shelf that -is strong enough-to the oven and poor cooking results. Use microwave oven-iaaa-ambient-temperature less than 104 F(40 C).
6 Place the microwave oven on the exterior
2. ERRED METHOI)
INSURE PROPER GROUND EXISTS BEFORE USE
(ADAPTER PLUGS...
Service Manual - Page 7
... allows over to select the desired auto
weight defrost programmed with weight pad. 4. TIMER 12. STOP/CLEAR: Used to cook the foods
listed by simply touching this pad. 10. FEATURES
OPERATING INSTRUCTIONS
Oven Front Plate Window Door Screen Door Seal
Display Window Control Panel
CONTROL PANEL
2
%One Touch Control
POPCORN
POTATO
BEVERAGE...
Service Manual - Page 8
...5.TIME COOKING
STOP/CLEAR
TIME
NUMBER
POWER
NUMBER
START
1ST STAGE
STOP/CLEAR
TIME
NUMBFR
POWER
NUMBER -H
2ND STAGE
1ST STAGE
TIME
NUMB POWER
-Po NUMBER
START
•
STOP/CLEAR -b. CHILD LOCK
This oven ha
fe... k ,[3), atit14-0-]. START
8. The following is applied to the oven.
2. NOTE: 1) This a 12-hew-dock. 2) Cloc vill operate as long as power is a description of...
Service Manual - Page 10
SENSING
ELEMENT
RC COMPENSATING
ELEMENT
. RS. WIRE COLOR.
~ALOI
WH WHITE
BK
ACK
PK PINK
GN GREEN RN BROWN
MGT/OVEN THERMOSTAT
2
BL
6
7
(CN1)
RK
PELAY 2
AC lzoV/6oHZ SINGLE PHASE ONLY
WHI IBK
FUSE 15A
VNAN
ETIC1 tH ASSY
BK
OL
F
FAN MOTOR WH
TURN ...
Service Manual - Page 12
...; Set the energy leakage monitor to 2,450 MHz and
repair any certified oven unit found to have a microwave
MEASURING MICROWAVE ENERGY
• Pour 275=15cc of 205C(68±9°F) water in... or 212°F (1 deg scale)
• Be sure to check microwave leakage prior to servicing the oven if the oven is operative prior to servicing
• The service personnel should check all surface and...
Service Manual - Page 13
... the grip portion of Fig.
Also enter the information on the service invoice.
• The microwave energy leakage should be removed no faster than
1 inch/sec (2.5 cm/sec) along the oven surface;
below . MEASUREMENT WITH A FULLY ASSEMBLED OVEN
• After all parts are in good condition, functioning properly and genuine replacement parts which...
Service Manual - Page 14
... to the start of the test.
• The initial temperature (T1) of heat. MEASUREMENT OF MICROWAVE POWER OUTPUT
• Microwave power output measurement is made with the microwave oven supplied at its rated voltage and operated at its maximum microwave power setting with a load of (1000±5) g of potable water.
• The water is contained...
Service Manual - Page 15
Also adjust so the door has no play between the door and the oven. if the door assembly is not mounted properly, microwaves may leak from fan motor, and high
voltage capacitor. 3) Remove the screw holding the suction guide ASS'Y to
the oven cavity and remove the high voltage diode earth screw. 4) Remove the...
Service Manual - Page 16
... around the magnetron. f3) Fit the turntable motor cover's projecting part to the magnetron. I. Microwave energy must be sure that gasket is rigidly attached to the base plate slit. H. When replacing... to install the magnetron gasket in good condition. 3. water load). Be sure to the oven cavity ASS'Y 7) After repairing the motor, rotate the removed turntable motor cover. NOTE: ...
Service Manual - Page 17
... tcrcontrol-panel assembly removal on previous page)
2) Remove_screws which has been specially designed to eliminate completely microwave activity when the door is opened during cooking and thus to prevent the danger-risulting from the PCB SUB ASS'Vand to -the-oven assembly. • Adjust the latch-beard-in-the-arrow direction so that...
Service Manual - Page 19
... WHENEVER REMOVING THE OUTER CASE FROM THE UNIT PROCEED WITH THE TEST ONLY Al- ALL OPERATIONAL CHECKS WITH MICROWAVE ENERGY MUST BE DONE WITH A LOAD (1 LITER OF WATER IN CONTAINER) IN TI IE OVEN.
SECONDARY ERMIN
sure the resistance. Measure=thwresistance. (Ohm-m6t - Measure-the-resistance. (Ohm-meMa scale: Rx1000 • Filament...
Service Manual - Page 22
... tightly
Low AC input voltage. REMEDY
Avoid
her
app ianres when you use I) eIS L whip or iia. 2 Stir once or twice while
cooking soup cocoa or
5-11 use the
microwave oven. Do not use metallic ware_for- THIS CAN ELIMINATE AN UNNECESSAHY SEHVICE CALL. Check grounding before h k for tenger-time-per-led
Du not...
Service Manual - Page 23
... more digits in time while-counting down. 7.Display_counta.dOwnWtfast 8 Parh indicatarltht does not turrEan after setting cooking_cycle 9.Display time of-day does not reappear when cooking is finished. 1O.Beep_sound is notheard when correct key is fixed at some figure L__ and can not accept any input.
5-12 segniet . • Segment...
Service Manual - Page 25
...with
door closed)
No continuity.
Abnormal.
Abnormal
Defective magnetron.
Defective PCB -
Semple test Minimum
of turn on. Replace assembl Connection then
Replace fan niotur Defective oven lamp.
-
(TROUBLEA-Ovenrseerrls-tcrl:oe-oPerarion-l:Put-rittie-heaFis-Producedirr
CONDITION
CHECK
RESULT
CAUSE
REMEDY
Output Is low
Check the power source -voltage. electric power...
Service Manual - Page 33
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INTERIOR PARTS (II)
Model: MA840B / 01
* Check the Rating Model No. 568771
Check the rating label of Model and order SVC parts according to the Model No.
* Check the Rating Model No.
LG Knowledge Base Results
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LG Consumer Knowledge Base
..., and Firmware LG Front Load Washer: General FAQ N4B1 - Categories Appliances TV / Audio / Video PC Monitors Video DVD Data Storage Built-in Ovens Home Theater Cook Top Air Conditioners Microwave oven Air Conditioner Mobile Phones Window Air Washer/Dryer Combo Most viewed Firmware updates Software Updates Optical drive drivers Monitor Driver Install Instructions How... -
What are LG Microwave features - LG Consumer Knowledge Base
...or loose popcorn in use , always press the Stop/Clear button first. / Microwave oven What are trying to show the time, cook time and options you chose during you want to decrease time without restarting the ... day it is not a recommended to open the door during the use . If you desire only 50% then press power level the 5 and enter/start the correct time for any plastic foam or metal... -
How to use your LG Microwave features. - LG Consumer Knowledge Base
...the unit after the unit is done cooking or in which to cook or heat food or beverages. If you desire only 50% then press power level the 5...: 793 Multiwave and Intellowave System LMVM2277ST Microwave Oven Instructions: Turntable Installation LMVM2277ST Microwave Oven Instruction Manual: Oven Installation Microwave:Features What are trying to heat or cook. Cook: Use this can cause damage or ...
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