| rst 5.6 & rct 7.6 service manual 2007_rev1.0
RST5.6 & RCT 7.6 Sears Service Manual 2007
Console/Upper Board Troubleshooting
Symptom
Possible Cause
Test Procedure
Repair
No display on the console and
power switch on machine is
dark.
No display on the console and
power switch on machine is lit.
Circuit breaker in home has
tripped.
Breaker on machine has tripped
or has failed.
Failed power switch.
Failed power cord.
Improper wiring or AC wires
have failed.
Failed Console cable.
Failed Upper board
-Check for dedicated circuit (20
amp is ideal) and check wall
outlet voltage (120 VAC).
Reference Power Source
Wiring. (p. 20)
-Reset breaker.
Reference Power Source
Wiring. (p. 20)
-Make sure power switch is
turned on.
Reference Power Source
Wiring. (p. 20)
-Take voltage check of power
cord.
Reference Power Source
Wiring. (p. 20)
-Check all wiring coming in from
the power switch to the motor
control board and to the upper
board.
Reference Power Source
Wiring. (p. 20)
Reference Digital Drive Wiring
Diagram. (p. 17)
Reference Upper Board Wiring
Diagrams. (p. 18 & p. 19)
-If LED’s on motor control board
are present, Check console cable
voltages at B7, B8
Reference Cut Console Cable
Voltage Chart. (p. 23 & 24)
-Check voltage and continuity of
console cable.
Reference Cut Console Cable
Voltage Chart. (p. 23 & 24)
Reference Upper Board Wiring
Diagrams. (p. 18 & p. 19)
Reset breaker.
Replace breaker if necessary.
Replace power switch if
necessary.
Replace power cord.
Connect wires correctly or
replace as needed.
Replace console cable.
Replace upper board.
