21
S Y M P T
CHECKOUT
P R O C E D U R E
CAU
S O L U T I O N
No heat on
either
heater.
Check resistance - Pin 3 to Pin 6.
Resistance should be 110 ohms.
If circuit reads open - -
Open
Sensor
Replace Heater
Assembly "A".
Check resistance - Pin 2 to Pin 5.
Resistance should be 6 ohms.
If circuit reads open - -
Open
Heater
Replace both Heater
Assemblies.
Handpiece
overheating.
Check resistance - Pin 3 to Pin 6.
Resistance should be 110 ohms.
If circuit reads less than 105 ohms
- -
Shorte
Sensor
Replace Heater Assembly
"A".
Heat on
only 1
heater.
Check resistance - Pin 2 to Pin 5.
If resistance equals 12 ohms - -
Open
Heater
Replace cold Heater
Assembly.
Fuse blows
when unit is
turned on.
Check resistance - Pin 4 to Pin 5
and Pin 4 to Pin 2.
Circuit should read open. If not - -
Shorte
Heater
Remove handpiece side
cover "B". Disconnect
wire connections to Heater
"B". Check resistance
again. If circuit reads
open, replace Heater "B".
Table II. Heater Assembly Checkout Procedures