Commercial Microwave—Technical Information
120V, 60 Hz Models
RMS10TSA P2006701M RMS10DSA P2006702M
MMS10TSA P2006705M MMS10DSA P2006706M
Due to possibility of personal injury or property damage, always contact an authorized technician for servicing or
repair of this unit.
Single Phase, 3 wire grounded
Nominal microwave energy (IEC705)
Minimum temperature rise (∆T)
May 2019
©2019 ACP, Inc. 16500067
Rev 2
Service should only be performed by a Qualified Service Technician
To avoid the risk of electrical shock, personal injury or death, disconnect power to oven and discharge capacitor
before servicing.
Component Testing Procedures
Disconnect all wires from TCO.
Measure resistance across terminals.
Cavity TCO…………......................................
Magnetron TCO ..............................................
Open at 203° F (95° C) Closes at 185°
F (85° C)
Open at 293° F (145° C) Closes at 275°
F (135° C)
Discharge Capacitor
Remove diode lead from capacitor and
connect ohmmeter.
Reverse leads for second test.
Infinite resistance should be measured in
one direction and 50KΩ or more in the
opposite direction.
NOTE: Test meter must contain a
battery of 6 volts minimum.
Discharge Capacitor
Remove wires from capacitor terminals and
connect ohmmeter, set on highest
resistance scale to terminals.
Also check between each terminal and
capacitor case.
1.05uf
Between Terminals: Meter should
momentarily deflect towards zero then
return to over 5 MΩ. If no deflection
occurs, or if continuous deflection
occurs, replace capacitor.
Terminal to Case: Infinite resistance.
Discharge Capacitor
Remove wires from magnetron and
connect ohmmeter to terminals. Also check
between each terminal and ground.
2M248(J)A-B2
Between Terminals: Less than 1 Ω.
Each terminal to ground measures
Infinite resistance.
NOTE: This test is not conclusive. If
oven does not heat and all other
components test good replace the
magnetron and retest.
Remove all wires from terminals.
Measure resistance from:
terminal to terminal......................................
120vac 60hz 35RPM
Bidirectional
Approximately 4K Ω.
Remove all wires from motor.
Measure resistance from terminal to
terminal… .......................................................
Fuse Block
Filter Assembly
Power In terminals .......................................
Power Out terminals ....................................
Fuse……………………………………………
120vac
120vac
If no power in, check power outlet If
no power out, check fuse
Rated 20A Fuse 250vac
May 2019
©2019 ACP, Inc. 16500067
Rev 2
To avoid risk of electrical shock, personal injury or death, disconnect power to oven and discharge capacitor
before servicing, unless testing requires power.
Component Testing Procedures
Discharge Capacitors
Remove all wires from terminals.
Measure resistance from:
Terminal 1 to Terminal 2...........................................
Wire 5 to Wire 6 .........................................................
Terminal 4 to Ground screw on transformer..............
Terminal 4 to any other terminal ...............................
2.0 Ω.
<1.0 Ω.
102Ω.
Infinite
Interlock
Switch
Assembly
1) Inspect Latch for Cracking/Breakage
2) Disconnect Wires to Switch.
With door open measure resistance:
Secondary………………………………….
Monitor……………………………………...
Primary……………………………………..
With door closed measure resistance:
Secondary………………………………….
Monitor……………………………………...
Primary……………………………………..
Infinite
Continuity
Infinite
Continuity
Infinite
Continuity
Service Mode
May 2019
©2019 ACP, Inc. 16500067
Rev 2
To avoid risk of electrical shock, personal injury or death, disconnect power to oven and discharge capacitor
before servicing, unless testing requires power.
To Check Magnetron Hours or Door Cycles:
1) Open door and Press/Hold Pad #3 for 5 seconds or until “SErV” is Displayed
2) Press Pad #1 to display Magnetron Hours in 100’s.
3) Press Pad #3 to display Door Cycles in 100’s