Manual

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EEPROM
MEMORY
MODULE
EEPROM
BACKUP &
FIRMWARE
UPDATE
(EDGE3) (EDGE2)
MOVE JUMPERS (x3)
TO LEFT-HAND SIDE POSITION
TO ENABLE INTERNAL DMX-B INPUT
MADE IN CANADA
WWW.JOHNSONSYSTEMS.COM
CD80 DIGITAL PA CK CONTROLLER
REV.1 1132
SERIAL NUMBER
3000 SERIES
DPC-24/12
FAN FUSE
REPLACE WITH
2A 250V
FAST-ACTING
GMA TYPE
FUSE ONLY!
CAUTION: AC LINE VOLTA GE!
EEPROM Memory Module Enable Internal DMX-B Input Jumpers Fan Fuse
DPC-24/12 Circuit Board
The DPC-24/12 circuit board is the central electronic control system (a.k.a. brain) for DPC-12 and
DPC-24 retrot control modules. The edge connectors (EDGE1, EDGE2, EDGE3 and EDGE5 (for
DPC-24 only)) located on the upper edge of the DPC-24/12 circuit board connects with the OEM
connectors inside the CD80 dimmer pack.
There are three (3) items of interest located on the DPC-24/12 circuit board:
• Located on the upper left-hand side of the board, there is a removable EEPROM memory
module. The EEPROM memory module slides into the PORT1 connector located on
the upper left-hand side of the board. The EEPROM memory module is used to backup
important conguration settings and may be removed for safe storage. The EEPROM
memory module can also be used for rmware updates. Refer to menu items “EEPROM”,
“FW-LOAD”, “RESTORE” and “BACKUP” on page 19, 20 and 21 for further details.
• Located on the upper-central left-hand side of the board, there are two sets of jumpers. If
the DMX input is connected internally, on a terminal block mounted inside the CD80 dimmer
pack, the jumpers will need to be moved on the DPC-24/12 circuit board to enable the
DMX-B input. To enable the internal DMX through the EDGE2 connector on the DPC-24/12
circuit board, move the three (3) jumpers on JP2 to the left-hand side position. To enable the
internal DMX through the EDGE3 connector on the DPC-24/12 circuit board, move the three
(3) jumpers on JP3 to the left-hand side position.
• Located on the upper right-hand side of the board, there is a fan fuse. The fuse is required
for safety and protects the fan control circuitry on the DPC-24/12 circuit board. If the fuse
is blown (open), the “FAN” LED illuminates. A blown (open) fuse suggests the fan may
be defective and needs to be replaced (Johnson System Inc., Part Number: CF-CD80P).
Replace the fuse with a 2A, 250V, fast-acting, GMA type fuse only!