DH Instruments POWER SUPPLY KIT User manual

REPLACEMENT
POWER SUPPLY KIT
for RPM3 or molbox RFM
Installation Instructions
REPLACEMENT POWER SUPPLY KIT,
P/N 401903, INCLUDES
QTY PART NO DESCRIPTION
1 102705 Power Supply, +5V, +12V
1 102704 Plastic Standoff, Locking
1 102722-Z Screw, Nylon, M3 x 12
2 102721-Z Washer, Nylon, M3
This is a replacement power supply kit for RPM3 or
molbox RFM. It is important to follow the installation
instructions and to use the nylon mounting hardware
provided in this kit at the specified location, otherwise
the power supply could short out.
REMOVING THE POWER SUPPLY:
nDisconnect power cord.
Remove enclosure cover from unit (disconnect fan
cable prior to completely removing cover).
Remove chassis from enclosure base (lift straight out).
Detach AC cable and DC cable from power supply.
The power supply is mounted in three (3) places with
a stainless steel screw, a nylon screw and a locking
plastic standoff (see Figures 1 and 2).
Figure 1 Top View
1. Stainless Steel Screw 3. Plastic Standoff
2. Nylon Screw 4. Front of Unit
Figure 2 Right Side View
1. Plastic Standoff
Remove the stainless steel screw and
lockwasher, and retain them for use in mounting
the new power supply.
Remove and discard the nylon screw.
Turn the chassis on its side to access the bottom
of the main PCB.
Locate the tabs of the plastic standoff and
squeeze them together to release the standoff
from the main board. The power supply can
now be removed.
It is not necessary to remove the plastic
standoff from the old power supply, a new
standoff is included in this kit
Remove and discard the nylon washers
located between the metal mounting tabs and
the power supply.

RPM3 and molbox RFM are trademarks, registered and otherwise, of DH Instruments, Inc.
Document 560047 020724
DH Instruments, Inc.
4765 East Beautiful Lane
Phoenix AZ 85044-5318
USA
Tel [phone]
Fax [phone]
[e-mail]
www.dhinstruments.com
INSTALLING THE NEW POWER SUPPLY:
nInstall the new plastic standoff into the new power
supply.
Position the power supply in the correct mounting
location with the plastic standoff directly above the
mounting hole on the main board.
Press down on the power supply to captivate the
plastic standoff to the main board.
Install a nylon washer between the power supply and
the metal mounting tab, two (2) places, (see Figure 3).
Install the new nylon screw and stainless steel screw
and lockwasher at the correct locations (see Figure 3).
Figure 3 Left Side View
1. Screw, SS, M3 X 8 2. Nylon Washer (2 ea.)
and Lockwasher, SS, M3 3. Screw, Nylon, M3 X 12
Reattach DC and AC cables.
Place chassis into enclosure base.
Assemble enclosure cover to base by first
reconnecting the fan cable, then close cover and
install cover screws.