Altronic CPU-2000 Service Instruction - Page 19

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Altronic CPU-2000 Service Instruction
9.4 DIAGNOSTIC MODULE- The following tests are to be performed with known good Logic and Output
Modules.
PROBLEM
No function
from Module
10.0 BOARD REPLACEMENT PROCEDURE -OUTPUT MODULE TOP POWER BOARD
10.1 DISASSEMBLY PROCEDURE (refer to figure 3 or 4)
A.
Remove four screws (8) from top power board (3).
B.
Remove the screws (2f) from the output connector(s) and push connector back inside the box.
C.
Unplug the 4-pin ribbon cable from the top board and the 15-pin ribbon cable from the bottom
power board (2).
D.
The top power board can now be removed from the box.
10.2 ASSEMBLY PROCEDURE (refer to figure 3 or 4)
A.
Check the condition of the connecter gasket(s) (3a) and replace as necessary.
B.
Plug 15-pin ribbon connector into the socket on the bottom power board (2).
C.
Place top power board (3) in Output Module box.
D.
Install connector gasket(s) (3a) to connector(s) and insert the connector(s) into the box and
orient the key(s) toward bottom of box. Install the four screws (2f) and lockwashers (2e) for
each connector and tighten securely.
E.
Plug the 4-pin ribbon cable into the connector on the top power board.
F.
Secure the top power board with four screws (8).
G.
Retest Output Module per sections 4.0 and 6.0 to verify correct operation.
11.0 BOARD REPLACEMENT PROCEDURE-OUTPUT MODULE BOTTOM POWER BOARD
11.1
DISASSEMBLY PROCEDURE (refer to figure 3 or 4)
A.
Remove top power board (refer to section 9.1 ).
B.
Remove four screws (2f) from connector on side of Output Module box and push connector
into box.
C.
Remove the eight screws (2b, 5) from the bottom of the Output Module box.
D.
Remove the four standoffs (7) from the top of the bottom power board.
The bottom power board (2) can now be removed from the box.
E.
11.2
ASSEMBLY PROCEDURE (refer to figure 3 or 4)
A.
Check the condition of the connector gasket (3a) and replace as necessary.
B.
Examine the condition of the four insulators (2a) on the transistors on the bottom of the board
and replace if damaged.
C.
Place bottom power board (2) in box.
D.
Install the four standoffs (7) to secure board in box. Do not tighten.
E.
Install eight NEW screws (2b, 5) in bottom of Output Module box. Tighten securely.
F.
Tighten four standoffs securely.
G.
Install the connector gasket(s) (3a) and insert connector(s) into the box and orient the key(s)
toward bottom of box. Install the four screws (2f) and lockwashers (2e) for each connector
and tighten securely.
H.
Install top power board (refer to section 9.3).
I.
Retest Output module per sections 4.0 and 6.0 to verify correct operation.
TEST
TEST INDICATION
Section 8.1
Missing or incorrect
data (counts).
CORRECTIVE ACTION (see Fig. 5)
Replace circuit board assembly (5).
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