SERVICING
FIELD SERVICE:
For Experienced Technicians
Disconnect all power and data connections. Remove the
5 face plate mounting screws on the PCB side. Use only
direct replacement parts and use static discharge
precautions.
To replace an IC, using a small flat screwdriver carefully
remove the IC by gently lifting up between the socket and
the IC keeping the IC as flat as possible. Bend the
replacement IC’s legs so they are pointing straight down and
not angled outward. Align each pin In the center of each pin
hole and gently snap into place, all legs at one time, DO
NOT insert at an angle. Insure the IC is flush on the socket
and all pins are inserted.
TROUBLESHOOTING
Ÿ
check data input
Ÿ
possible CPU failure
Ÿ
If both data LED’s don’t work
Ÿ
check if power is present via the power LED, if not
check the internal fuse.
Ÿ
check if the input has a DMX512 signal by bypassing
the unit, if not check the DMX512 console or source.
Ÿ
check if the input has a DMX512 signal by bypassing
the unit, if not check the DMX512 console or source.
Ÿ
If the data and power are O.K. replace the output IC
and possibly the input IC’s.
Ÿ
If output doesn’t work
Ÿ
replace the respective input IC (i.e. input A doesn’t
work replace IC # for input A).
Ÿ
If only one of the inputs doesn’t work
Ÿ
check fuse and power connections
Ÿ
Unit won’t power up
CHECK
PROBLEM
DMX 2X1 / 3X1 MERGER USER GUIDE
Pg 6
ELM Video
Technology,
Inc.
DMG_User_Guide.lwp V2.10
Http://elmvideotechnology.com
copyright
©
2009 - 2013 ELM Video Technology, Inc.
Note - Take care not to touch the component pins or the inner pins of the connectors. Electrostatic
discharge may cause permanent damage to the unit.
Out A In
Pin 4
5x20mm Fuse
Header
B In
+5V In
Gnd
Shunt
Shunt
