Nordson 303 779B, Customer Product Manual

Page: 35 / 176

Installation
A 4-7
E
1998 Nordson Corporation
All rights reserved
303 779B
Issued 11/98
Manual 12-44
The voltages should be as follows (+ or - 10%):
Between PINs Between PINs Between PINs
1 and 2 = 15 Vac 7 and 8 = 15 Vac 13 and 14 =15 Vac
3 and 4 = 12 Vac 9 and 10 = 12 Vac 15 and 16 = 12 Vac
5 and 6 = 120 Vac 11 and 12 = 120 Vac 17 and 18 = 120 Vac
NOTE: If the proper voltages are not present, refer to the
Troubleshooting section.
Measure voltages at the card cage backplane board. All circuit boards in
the card rack should be disconnected from the backplane board to
prevent damage to the computer.
1. Remove the outer cover on the upper hinge side of the cooling
module, located on the exit end of the oven.
2. With the power on, measure voltages on the large terminal blocks
(TB235/241) located on the back of the backplane board.
1244007A
1
2
3
4
5
6
03
02
01
1
2
3
4
5
6
DC Terminals
(Terminal Block 235)
AC Terminals
(Terminal Block 241)
Fig. A 4-5 Backplane Terminal Blocks 235 and 241
9. Measuring the Card Cage
Backplane Voltages