Midmark® Dental Lights Circuit Breaker Test and Repair
|
Mounted To |
Ceiling, Chair, Track, Universal, and Wall/Cabinet |
| Serial Number | NW, RE, and V Serial Number Prefixes |
Refer to: Operator’s Manual for complete instructions on operating the light. Failure to do so could result in personal injury.
Perform an operational test on the dental light after repair is completed to confirm repair was properly made and that all malfunctions were repaired.
To Reset Circuit Breaker or Replace Fuse
There is a circuit breaker and two line fuses to check; the transformer output circuit breaker which can be reset and two transformer line input fuses which are one time use and must be replaced if blown.
1.Remove junction box cover. Refer to: Junction Box Removal
Always disconnect electrical power from the unit before removing any of the unit’s covers/shrouds or making any repairs to prevent the possibility of electrical shock. Failure to comply with these instructions could result in severe personal injury.
2.Unplug power cord of universal power supply from outlet receptacle.
Do not just reset circuit breaker or replace blown fuse. First, determine reason why circuit breaker tripped or fuse opened. Failure to do so could result in damage to unit.
3.Check position of white reset button (1) of circuit breaker. If reset button is flush, the circuit breaker is not tripped. If reset button is protruding, press the reset button to reset the circuit breaker.
4.Using a screwdriver, gently depress fuse cap (2) and then rotate 1/4 turn to left to free fuse cap. Pull fuse cap (2) from fuse body (3). Repeat step for remaining fuse.
5.Remove fuse(s) (4) from fuse cap(s) and inspect. If a fuse is discolored, blackened, has burnt or hot look, or fuse element is burnt through, fuse is blown and must be replaced
6.Insert fuse(s) (4) in fuse cap(s) (2).
7.Insert fuse cap (2) into fuse body (3). Using a screwdriver, gently depress fuse cap and then rotate 1/4 turn to right to secure fuse cap. Repeat step for remaining fuse.
8.Plug power cord of universal power supply into outlet receptacle.
9.Install junction box cover. Refer to: Junction Box Installation
