Input Board - Mackie FR Series Service Manual

THE MACKIE FIXER • MACKIE DESIGNS SERVICE NEWS
Procedure continued.
Input board work:
If the two ribbon cables are soldered to the input board, follow steps 7 to 11. If not, then go to step 12.
7. Remove the metal shield plate and insulator sheet from the back of the input board.
8. Carefully unsolder the ribbon cable headers from J16 and J11.
Discard part# 040-033-03, 4 inch ribbon cable.
Discard part# 040-033-02, 18 inch ribbon cable.
9. Solder two new headers (#400-077-00) to the input board, with the cutout side pointing towards
the center of the input board (i.e. downwards).
10. Replace the metal shield plate and insulator sheet onto the back of the input board.
11. Add part# 040-359-00, 4.25 inch ribbon cable to J11.
Add part# 040-360-00, 18 inch ribbon cable to J16.
Align each cable's color stripe with the header's pin 1.
Make sure both ribbons are fully inserted, then proceed to step 15.
If the two ribbon cables are not soldered to the board, follow steps 12 to 14.
12. Discard part# 040-062-00, 4.25 inch ribbon cable.
Discard part# 040-062-02, 18 inch ribbon cable. You may have to undo the display board screws
in order to remove it from J1.
13. Add part# 040-359-00, 4.25 inch ribbon cable to J11.
Add part# 040-360-00, 18 inch ribbon cable to J16.
Align each cable's color stripe with the header's pin 1.
Make sure both ribbons are fully inserted.
14. Refit the display board, once the long ribbon cable is securely attached to J1.
Putting the input board back in:
15. Add the two metal XLR plates (where fitted) and carefully fit the input board back in place. Put
the four pot knobs back after the board is in place.
16. It can be difficult getting the knobs back on through the chassis holes, but you can make it easier
by snipping off a bit of the plastic center ridge, as shown in the little knob diagram below.
17. Add and tighten all the nuts and screws, and the four chassis screws (removed in step 6).
18. Make sure that all ribbon cables are secure and that all ends are fully inserted.
19. Reconnect the black wire from the input board to the amp board.
20. Replace the top cover.
21/ Perform a complete specification and safety test before returning the unit to the customer.
Input
board
J11
Headers
J16
Pin 1 Color Stripe
Ribbon modification SSE July 2000
snip off
knob
Ribbon mod.pdf, page 2 of 2