Frigidaire MFM-6D User manual

MICROWAVE OVEN
SERVICE MANUAL
DEFROST COOK CLOCK
DEFROST
COOK
123
456
789
0
STOP/CLEAR
START
Model No.: MFM-6D
MFM-7DTP

PROPER USE AND SERVICE PRECAUTIONS...........................................................................................2
SPECIFICATIONS...........................................................................................................................................3
FEATURES DIAGRAM...................................................................................................................................4
INSTALLATION ...............................................................................................................................................6
OPERATION PROCEDURE...........................................................................................................................7
CONTROLS.....................................................................................................................................................8
INTERLOCK MECHANISM FUNCTIONS AND ADJUSTMENTS..............................................................22
MEASUREMENT OF THE MICROWAVE OUTPUT POWER....................................................................24
MICROWAVE EMISSION TEST ..................................................................................................................24
WIRING DIAGRAM.......................................................................................................................................25
CIRCUIT DESCRIPTION..............................................................................................................................26
SAFETY PRECAUTIONS FOR DISASSEMBLY AND REPAIR .................................................................28
DISASSEMBLY AND ASSEMBLY ...............................................................................................................29
TROUBLE SHOOTING GUIDE....................................................................................................................34
COMPONENT TEST PROCEDURE ...........................................................................................................41
PRINTED CIRCUIT BOARD ........................................................................................................................43
CIRCUIT CHECK PROCEDURE............................................................................................................43
P.C.B. CIRCUIT DIAGRAM......................................................................................................................48
COMPONENT INFORMATION...............................................................................................................50
PRINTED CIRCUIT BOARD....................................................................................................................51
P.C.B. LOCATION NO..............................................................................................................................52
EXPLODED AND PARTS LIST....................................................................................................................53
1
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 connection.
(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.
TABLE OF CONTENTS

1. For Safe Operation
Damage that allows the microwave energy (that cooks or heats the food) to escape will result in poor
cooking and may cause serious bodily injury to the operator.
IF ANY OF THE FOLLOWING CONDITIONS EXIST. OPERATOR MUST NOT USE THE APPLIANCE.
(Only a trained service personnel should make repairs.)
1) A broken door hinge.
2) A broken door viewing screen.
3) A broken front panel, oven cavity.
4) A loosened door lock.
5) A broken door lock.
The door gasket plate and oven cavity surface should be kept clean.
No grease, soil or spatter should be allowed to build up on these surfaces or inside the oven.
DO NOT ATTEMPT TO OPERATE THIS APPLIANCE WITH THE DOOR OPEN. The microwave oven
has concealed switches to make sure the power is turned off when the door is opened. Do not attempt to
defeat them.
DO NOT ATTEMPT TO SERVICE THIS APPLIANCE UNTIL YOU HAVE READ THIS SERVICE
MANUAL.
2. For Safety Service Procedures.
1) If the oven is operative prior to servicing, a microwave emission check should be performed prior to
servicing the oven.
2) If any certified oven unit is found to have excessive emission level 5mW/cm2, the service person
should:
(a) inform the manufacturer, importer or assembler,
(b) repair the unit at no cost to the owner,
(c) attempt to ascertain the cause of the excessive leakage,
(d) tell the owner of the unit not to use the unit until the oven has been brought into compliance.
3) If the oven operates with the door open, the service person should tell the user not to operate the oven
and contact the manufacturer and CDRH immediately.
2
PROPER USE AND SERVICE PRECAUTIONS
CAUTION: This Device is to be Serviced Only by Properly Qualified Service Personnel. Consult the
Service Manual for Proper Service Procedures to Assure Continued Compliance with
the Federal Performance Standard for Microwave Ovens and for Precautions to be
Taken to Avoid Possible Exposure to Excessive Microwave Energy.

* Specifications subject to change without notice.
3
SPECIFICATIONS
289
(11.4 in)
495
(19.5 in) 382 (15.0 in)
MFM-6D MFM-7DTP
POWER SUPPLY 120V AC 60Hz SINGLE PHASE WITH GROUNDING
POWER CONSUMPTION 920W
MICROWAVE OUTPUT POWER 600W (IEC 705)
FREQUENCY 2450 MHz
OUTSIDE DIMENSIONS (WxHxD) 495x 289 x 382mm (19.5 x 11.4 x 15.0 in.)
CAVITY DIMENSIONS (WxHxD) 320x 225 x 330mm (12.6 x 8.9 x 13.0 in.)
NET WEIGHT APPROX. 14Kg (30.9 lbs.)
TIMER 59 min. 99 sec. 59 min. 99 sec.
POWER SELECTIONS 2 LEVELS 2 LEVELS

4
FEATURES DIAGRAM (MFM-6D)
!@ # $ %
^
&
*
(
DEFROST COOK CLOCK
DEFROST COOK
123
456
789
0
STOP/CLEAR START
1
5
)
2
3
4
6
1. Door latch–When the door is closed it will
automatically lock shut. If the door is opened
while the oven is operating, the magnetron will
automatically shut off.
2.Door seal-The door seal maintains the
microwave within the oven cavity and prevents
microwave leakage.
3. Oven Cavity
4. Spatter shield-Protects the microwave outlet
from splashes of cooking foods.
5. Safety interlock system-Prevents the oven
from operating while the door is opened.
6. Door release button-Pushing this button
stops oven operation and opens the door.
7. Glass cooking tray-Made of special heat
resistant glass. The tray must always be in
proper position before operating.
Do not cook food directly on the tray.
8. Roller guide-Supports the glass cooking tray.
9. Door screen-Allows viewing of food.
The screen is designed so that light can pass
through, but not the microwaves.
10. Display-Cooking time & present time are
displayed.
11. Defrost-Used to defrost foods.
12. Clock-Used to set clock.
13. Cook-Used to cook.
14. Time set pad-Used to set the cooking time
and the present time.
15. Stop/Clear-Used to stop the oven operation
or to delete the cooking data.
16. Start-Used to start a selected operation.

5
FEATURES DIAGRAM (MFM-7DTP)
AM
Defrost
(Low)
PM No Or Alam On
Defront
(Low) Cook (Med) Cook (High) Lock Time
Cook
(Med) Cook (High)
Porozen
Reg Lag Beremeo Soup Quick On 30 Seca
Frozem
Pizea
Time 1 2 3
Alarm
Am/Pm
Start
Stop
Clear
Alarm
Stop
Baked
Potato Dinner Plate
To Cook:
1. Selet Power Level
or Preset from above
2. Enter cooking Time
(excopt for pecects)
3. Press Stait
To Set Time/Alam:
1. Press Time or Alarm
2. Enter desirad time
3. Select AM or PM
4. Prem Time or Alam
5. To shut off alam
Press Alarm Stop
45 6
78 9
0
AM
Defrost
(Low)
PM No Or Alam On
Defront
(Low) Cook (Med) Cook (High) Lock Time
Cook
(Med) Cook (High)
Porozen
Reg Lag Beremeo Soup Quick On 30 Seca
Frozem
Pizea
Time 1 2 3
Alarm
Am/Pm
Start
Stop
Clear
Alarm
Stop
Baked
Potato Dinner Plate
To Cook:
1. Selet Power Level
or Preset from above
2. Enter cooking Time
(excopt for pecects)
3. Press Stait
To Set Time/Alam:
1. Press Time or Alarm
2. Enter desirad time
3. Select AM or PM
4. Prem Time or Alam
5. To shut off alam
Press Alarm Stop
45 6
78 9
0
!@ # $ %
&
*
(
15
4
7
0
‘
+
=
Q
)
2
3
6
9
8
“
q
^
1. Door latch–When the door is closed it will
automatically lock shut. If the door is opened
while the oven is operating the magnetron
will automatically shut off.
2. Door seal-The door seal within the oven
cavity. Prevents microwave leakage.
3. Oven Cavity
4. Spatter shield-Protects the microwave outlet
from splashes of cooking foods.
5. Safety interlock system-Prevents the oven
from operating while the door is opened.
6. Door release button-Pushing this button
stops oven operation and opens the door.
7. Glass cooking tray-Made of special heat
resistant glass. The tray must always be in
proper position before operating.
Do not cook food directly on the tray.
8. Roller guide-Supports the glass cooking
tray.
9. Door screen-Allows viewing of food.
The screen is designed so that light can pass
through, but not the microwave energy.
10. Display-Cooking time & present time are
displayed.
11. Defrost(Low)-Used to defrost foods.
12. Clock(Med)-Used to cook at medium.
13. Cook(High)-Used to cook at high.
14. Popcorn-Used to Cook Popcorn.
15. Beverage/Soup-Used to heat/re-heat
beverage/soup.
16. Quick On-Touch to set re-heat setting in 30
second increments..
17. Frozen pizza-Used to cook frozen pizza.
18. Baked Potato-Used to cook baked potato.
19. Dinner plate-Used to reheat dinner plate.
20. Time-Used to set clock.
21. Time set pad-Used to set the cooking time
and the present time.
22. Alarm-Used to set alarm.
23. Am/Pm-Used to set clock & Used to set
alarm.
24. Alarm Stop-Used to clear the alarm data.
25. Stop/Clear-Used to stop the oven operation
or to delete the cooking data.
26. Start-Used to start a selected operation.

6
1. Steady, flat location
This microwave oven should be set on a stady, flat surface.
2. Leave space behind and side
All air vents should be kept a clearance. If all vents are covered during operation, the oven may overheat
and, eventually, cause oven failure.
3. KEEP away from Radio and TV sets
Poor television reception and radio interference may result if the oven is located close to a TV, Radio, or
antenna, feeder and so on.
4. KEEP away from heating appliances and water taps
Keep the oven away from hot air, steam or splash when choosing a place to position, it, or the insulation
might be adversely affected and breakdowns occur.
5. Power supply
• Check your local power source. This microwave oven requires a current of approximately 15 amperes,
120 Volts, 60Hz grounded outlet.
• Power supply cord is about 6ft long.
1. Longer cord sets or extension cord are available and may be used if care is exercised in their use.
2. If a long cord sets or extension cords is used, (1) the marked electrical rating of the cord set or
extension cord should be at least as great as the electrical rating of the appliance, (2) the extension
cord must be a grounding-type 3-wire cord, and (3) the longer cord should be arranged so that it will
not drape over the countertop or tabletop where it can be pulled on by children or tripped over
accidentally.
6. Examine the oven when unpacking for any damage such as:
A misaligned door, Broken door, or dent in cavity.
If any of the above are visible. DO NOT INSTALL, and notify intirion corp immediately.
INSTALLATION
3-prong plug
3-prong Receptacle
Receptacle
Box cover
Grounding Lead Receptacle Box cover
Grounding Adaptor
Receptacle
When use a grounding adaptor, make
sure the receptacle box is fully grounded
When use 3-pronged plug

7
This section includes useful information about oven operation.
OPERATION PROCEDURE
Plug power supply cord into a standard 3-
pronged 15 Amp, 120V AC 60Hz power outlet
socket.
After placing the food in a suitable container,
open the oven door and put it on the glass tray.
The glass tray must always be in place during
cooking.
Shut the door. Make sure that it is firmly
closed.
When the oven door is opened, the light turn
off.
The oven door can be opened at any time
during operation by touching the door release
button on the control panel. The oven will
automatically shut off. To restart the oven,
close the door and then touch START.
Each time a pad is touched, a BEEP will
sound to acknowledge the touch.
The display will show “: 0” when the oven is
plugged in.
Time clock returns to the present time when
the cooking time ends.
When the STOP/CLEAR pad is touched
during the oven operation, the oven stops
cooking and all information retained.
To erase all information (except the present
time), touch the STOP/CLEAR pad once
more. If the oven door is opened during the
oven operation, all information is retained.
If the START pad is touched and the oven
does not operate, check the area between the
door and door seal for obstructions and make
sure the door is closed securely.
The oven will not start cooking until the door is
completely closed or the program has been
reset.
NOTE:
When the cooking time is up the time
pointer reads “0”, you can hear the beep
and the heating stops. PLEASE NOTE
THAT THE TIMER CONTINUES FOR
THREE (3) MINUTES AFTER THE
COOKING STOPS. This delays
reactivation of the refrigerator and
lengthens its useful life. Open the door
and take out the food (you need not wait
for the timer to stop to remove food). If
you wish to check the food before the end
of set time, simply open the door and the
oven will stop cooking. PLEASE NOTE
THAT THE TIMER DOES NOT STOP
when the door is open, but the oven does
stop cooking. When the door is closed,
the oven will resume cooking
automatically. Cooking time can be reset
at any time during the cooking operation
by turning the timer knob. PLEASE NOTE
THAT THE REFRIGERATOR IS OFF
DURING THE MICROWAVE OVEN USE.
NOTE: Make sure the oven is properly installed and plugged into the electrical outlet.
1
2
3
4
5
6
7
8
9
10

8
When the oven is first plugged in, the display will flash ":0" and a tone will sound. If the AC power ever goes
off, the display shows ":0" when the power comes back on.
DO THIS...
1. Touch CLOCK pad.
THIS HAPPENS...
This is a 12 hour clock system.
CONTROLS (MFM-6D)
SETTING THE CLOCK
NOTE: If you attempt to enter an incorrect time, the time will not be set and a error signal tone will
sound. Touch the CLOCK pad and re-enter the time.
CLOCK
2. Touch CLOCK pad once
more.
This is a 24 hour clock system.
CLOCK
4. Touch CLOCK pad.
The display will stop blinking, and the colon starts blinking.
If you selected 12 hour clock system, this digital clock allows you to set from 1:00
to 12:59.
If you selected 24 hour clock system, this digital clock allows you to set from 0:00
to 23:59.
CLOCK
DEFROST COOK
DEFROST COOK
3. Enter the correct time of day
by touching the numbers in
sequence.
The display will then begin
blinking.
1 2 3 0
DEFROST COOK
NOTE:
This oven has multiple
clock systems. If you want
12 hour clock system, omit
this step.

9
When DEFROST is selected, the automatic cycle divides the defrosting time into periods of alternating
defrost and stand times by cycling on and off.
DEFROSTING
DO THIS...
1. Touch DEFROST pad.
THIS HAPPENS...
The DEFROST indicator lights
and “ :0” is displayed.
DEFROST
DEFROST COOK
3. Touch START pad.
When you touch START pad, the DEFROST indicator starts blinking to show the
oven is in the DEFROST mode. The display counts down the time to show you
how much defrosting time is left in the DEFROST mode. The oven beeps during
the defrosting cycle to signal that the food needs to be turned or rearranged.
When the defrosting time ends, you will hear 3 beeps.
START
2. Touch number pads for the
defrosting time you want.
The display will show the
numbers you pressed in the
order you touched.
2 7 1 0
DEFROST COOK
NOTE: Your oven can be
programmed for 59
minutes 99
seconds. (59:99)