Table of Contents
Advertisement
13-4
AL 66 Ballast Wiring
18
BALLAST
BALLAST
Path of Power to the PC Board
•
This section is useful when there is no power reaching the PC board (no
LEDs lighted). Before tracing the power, check the fuse on the PC board
and the incoming power.
•
On 240V equipment, the power cord enters the rear of the unit. The two
hot conductors are connected by wire nuts to wires that are in turn
connected to the front of a terminal strip. One of these two wires passes
through a fuse and on 60 Hz units is then connected to a voltage selector
switch, then is connected to taps on a step-down autotransformer. This
transformer is located under the terminal strip on the component bracket
near the dividing wall. The transformer tap marked 120V becomes the
unit common and returns to the terminal strip. The other line wire is
connected to the transformer common and becomes the hot 120V lead to
the PC Board and also returns to the terminal strip. The power is
distributed from the strip and a pair of wires goes to the PC board.
Interlock System
•
The internal interlock system serves two purposes. The first is for operator
safety by insuring the safety glass is in place before operation. This glass
filters short UV radiation and covers the high voltage lamp terminals.
This interlock also protects from overheating by traveling through two
thermostats in the lamp head. There is also an outlet on some equipment
marked "interlock" and is not used in this equipment.
17
16
15
14
13
12
11
10
AC IN
6 GA.
BLK
CONTACTOR
CAP
#1
120
COM
CAP
#3
120
COM
TERMINAL STRIP
9
8
7
6
5
4
3
2
NO. 29 (VIOLET).
NO. 20 (ORANGE
TO CAP. PACK).
COM
BALLAST
#2
120
CAP
COM
BALLAST
#4
120
CAP
94MS41 Rev C1 S/W Ver. 2.06
1
Advertisement
Table of Contents
