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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.11 – FIRING BOARD
MAIN TRANSFORMER VOLTAGE TEST (continued)
PROCEDURE
ELECTRIC SHOCK
can kill.
• Do not touch electrically hot parts.
13. Remove the input power to the DC-600. Remove
the screws from the control box cover and careful-
ly lower the cover and locate plug J5 on the Firing
Board. See Figure F.11.
14. Turn on the DC-600 and check for approximately
32 VAC at the following pins of plug J5. These are
the phase angle winding voltages. See Figure
F.11.
Plug J5 pin-15 (lead #203) to pin-16 (lead #204)
Plug J5 pin-8 (lead #205) to pin-7 (lead #206)
Plug J5 pin-6 (lead #207) to pin-5 (lead #208)
18. If the correct primary voltages are applied to the
main transformer and any of the secondary volt-
ages are missing or not correct, the transformer
may be faulty.
NOTE: Always check the wiring between the trans-
former windings and the test points before replac-
ing the transformer.
TROUBLESHOOTING AND REPAIR
F-24 F-24
DC-600
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WARNING