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FIRING BOARD
G3742-[ ]
LED7
LED8
LED9
LED1
LED2
LED3
LED4
LED5
LED6
LED10
J5
J6
J7
J4
J8
(205) 8
(206) 7
(207) 6
(208) 5
4
3
2
1
16 (204)
15 (203)
14
13 (231)
12 (215)
11
10
9
FIGURE F.3 – FIRING BOARD
INTERNAL TRIGGER CIRCUIT TEST (continued)
PROCEDURE
1. With the correct input power applied to the DC-600
and the trigger circuit not activated, LEDs 7, 8 &9
on the firing board should be lit. When the trigger is
activated, all of the LEDs should come ON. See
Figure F.1.
2. If LED 10 and LEDS 1 thru 6 light when the trigger
circuit is activated, the wiring and circuitry to the fir-
ing board is good. If there is no output at the studs,
perform the Firing Board Test and see the PC
Board Troubleshooting Guide.
3. If LED 10 does not light when the trigger circuit is
activated check the 10 amp Circuit Breaker. See
Figure F.2.
4. With a Voltmeter, check for 42vac at TS-2, termi-
nals2&42.SeeFigure F.2. If not present, check
wiring per the Simlpified Trigger Diagram (Figure
F.5). If OK, perform the Main Transformer Test.
5. Remove the main input supply power to the DC-
600.
6. Check for continuity (zero ohms) from lead #42A to
lead #2 at the 14-pin receptacle pin “C”. Also check
continuity to the Output Terminal Switch. See the
Simplified Trigger Diagram. If a resistance of any
value is indicated, check the associated wires and
plugs.
7. Check for continuity (zero ohms) from pin “D” (lead
#4) at the 14-pin receptacle to the output terminal
switch and also to plug J5-pin 9 at the firing board.
See the Simplified Trigger Diagram and Figures
F.1 and F.2. If a resistance of any value is indicat-
ed, check the associated wires and plugs.
8. Check for continuity (zero ohms) from lead #41 (14
Pin Connector Pin I) to plug J5-pin 1 at the firing
board. See the Simplified Trigger Diagram and
Figure F.1.
TROUBLESHOOTING AND REPAIR
F-14 F-14
DC-600
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ELECTRIC SHOCK
can kill.
•
Have an electrician install and
service this equipment. Turn the
input power OFF at the fuse box
before working on equipment. Do
not touch electrically hot parts.
WARNING