12
R-216(G)
R-216(IN)
R-216(W)
R - 2 1 6 ( Y )
F
THERMAL CUT-OUT TEST
CCARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of the thermal cut-out. Then using an ohmmeter, make a
continuity test across the two terminals as described in the below.
CARRY OUT 4R CHECKS.
Table: Thermal Cut-out Test
Temperature of "ON"
Temperature of "OFF"
Indication of ohmmeter (When room
Parts Name
condition (closed circuit).
condition (open circuit). temperature is approx. 20˚C.)
Thermal cut-out 95˚C TC1(MG.)
Below 75˚C
Above 95˚C
Closed circuit.
Thermal cut-out 125˚C TC2 (OVEN)
This is not resetable type. Above 125˚C
Closed circuit
If incorrect readings are obtained, replace the thermal cut-out.
An open circuit thermal cut-out TC1 (MG) indicates that the magnetron has overheated, this may be
due to resistricted ventilation, cooling fan failure or a fault condition within the magnetron or HV circuit.
An open circuit tthermal cut-out TC2 (OVEN) indicates that the food in the oven cavity may catch fire,
this may be due to overheating produced by improper setting of the cooking time or failure of the control
panel.
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
C. A normal capacitor shows continuity for a short time (kick) and then a resistance of about 10M
Ω
after it has been charged.
D. A short-circuited capacitor shows continuity all the time.
E. An open capacitor constantly shows a resistance about 10 M
Ω
because of its internal 10M
Ω
resistance.
F. When the internal wire is opened in the high voltage capacitor, the capacitor shows an infinite
resistance.
G. The resistance across all the terminals and the chassis must be infinite when the capacitor is
normal.
If incorrect reading are obtained, the high voltage capacitor must be replaced.
CARRY OUT 4R CHECKS.
E
SWITCH TEST
Table: Terminal Connection of Switch
Plunger Operation
COM to NO
COM to NC
Released
Open circuit
Short circuit
Depressed
Short circuit
Open circuit
COM; Common terminal,
NO;
Normally open terminal
NC;
Normally close terminal
If incorrect readings are obtained, make the necessary switch adjustment or replace the switch.
CARRY OUT 4R CHECKS.
CARRY OUT 3D CHECKS.
Isolate the switch to be tested and using an ohmmeter check between the terminals as described in
the following table.
G
MOTOR WINDING TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the two
terminals as described in the table below.
Table: Resistance of Motor
Motors
Resistance
Fan motor
Approximately 400
Ω
Turntable motor
Approximately 12 k
Ω
If incorrect readings are obtained, replace the motor.
CARRY OUT 4R CHECKS.
