6060 Spine Road
Boulder, CO 80301 USA
T 303 444 2009
F 303 444 9543
Analog Printed Circuit Board Replacement Instructions
Sievers® UPW Boron Analyzer
1. Purpose
To remove and replace the analog printed circuit board (PCB) in the Sievers UPW
Boron Analyzer.
2. Scope
This procedure describes how to remove and replace the analog PCB of the Sievers
UPW Boron Analyzer and applies to the current revision of the assembly.
3. Responsibilities
The removal and replacement of this assembly is to be performed by
personnel trained in electro-mechanical equipment maintenance. The
successful performance of this procedure requires that you be mechanically
proficient with assemblies, tools, and mounting hardware. Please read the
entire instruction before proceeding. Additionally, ensure that you have
familiarized yourself with the analyzer by thoroughly reading the Operation
and Maintenance Manual.
4. Safety
WARNING
Although you will turn off power to the analyzer, the power cord to the unit will
remain connected for ESD protection. To avoid potentially dangerous shock, do
not touch any component in the card cage area (upper-left corner) of the
analyzer.
This procedure requires that you gain access to the inside of the analyzer. To avoid
potentially dangerous shock, be sure to power off the analyzer as described in the
procedure. To ensure correct grounding of the chassis for electro-static discharge
(ESD) protection, do not disconnect the power cord from the unit. Be cautious when
handling electronic components in and around the card cage.
5. Materials
•
•
•
Replacement display panel assembly
ESD Wrist Strap (included)
Phillips Screwdriver
GE Analytical Instruments, Inc. ©2005H
Page 1 of 6
DIN 71123 Rev. A
BORON, ANALOG BOARD, REPL. INST.
6. Procedure
6.1 Prepare the analyzer for the display panel removal and replacement.
6.1.1
If the analyzer is currently operating, press STOP on the front panel to put the
analyzer in a stopped state.
6.1.2
Turn off power by toggling the On/Off switch on the side of the analyzer to the 0
position.
6.1.3
Shut off flow of sample fluid into the analyzer by closing the valve(s) of all source
water inlet lines.
6.2 Remove the analog board from the card cage assembly.
6.2.1
Open the door of the analyzer.
6.2.2
Remove the ESD wrist strap from its packaging. Slip the wrist loop over your hand
and cinch it snugly around your wrist. Attach the alligator clip to the ground stud on
the inside lower right corner of the door (see Figure 1).
Ground Stud
ESD Strap Alligator Clip
Figure 1. ESD Strap Attachment to Ground Stud
6.2.3
Using a Phillips screwdriver, loosen the captive screws (either four or six) securing the
electronics cover to the chassis (see Figure 2). Remove the cover and set it aside.
GE Analytical Instruments, Inc. ©2005H
Page 2 of 6
DIN 71123 Rev. A
BORON, ANALOG BOARD, REPL. INST.
Mounting
Screws
(4 or 6)
Figure 2. Electronics Cover Mounting Screws
6.2.4
If installed, remove the black metal card retainer bracket from the front of the card
cage by unscrewing the two captive screws. Set the bracket aside.
6.2.5
Locate the analog board in the right-most slot of the card cage (see Figure 3).
(boards
removed for
illustration)
Top Card
Ejector
Connector P1
Analog
Board
Bottom Card
Ejector
Figure 3. Analog Board – Connector P1
GE Analytical Instruments, Inc. ©2005H
Page 3 of 6
DIN 71123 Rev. A
BORON, ANALOG BOARD, REPL. INST.
6.2.6
Locate analog board connector P1 (see Figure 3). The conductivity cell cable attaches
to the P1 connector with a mechanical latch. To disconnect the cable, press on the
latch release button located in the center of the connector (see Figure 4.) Unplug the
cable and move it out of the way.
Press the mechanical latch to
release cable from connector
Figure 4. Control Cable Connector Latch
6.2.7
Place your fingers on the card ejectors located at the top and bottom of the analog
board (see Figure 3). Rotate the card ejector handles away from the card, dislodging
the analog board from the card cage connector.
6.2.8
Slide the analog board out of the card cage and place it aside.
6.3 Install the replacement analog board in the card cage.
6.3.1
Remove the replacement analog board from its ESD protective cover (see Figure 5).
Figure 5. Replacement Analog Board
GE Analytical Instruments, Inc. ©2005H
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DIN 71123 Rev. A
BORON, ANALOG BOARD, REPL. INST.
6.3.2
Position the replacement analog board in front of the card cage with the component
side of the board facing to the left (see Figure 3).
6.3.3
Align the top and bottom edges of the analog board with the top and bottom card
guides. Gently slide the card toward the back of the cage until the card cage
connector begins to engage.
6.3.4
Firmly push the board into the card cage so the connector of the analog board fully
seats with the card cage connector.
6.3.5
The plug on the conductivity cell cable is keyed and can only fit one way into the
connector jack. Orient the plug correctly and insert it into analog board connector P1
(see Figure 4). Ensure that the connector’s mechanical latch secures the connector in
place.
6.4 If previously removed, attach the black metal card retainer bracket to the front of the card
cage by screwing in the two captive screws – one at the top and one at the bottom. Make
sure the bracket is oriented with the longest "section" to the top of the card cage (see Figure
6).
Make sure the
bracket is
positioned with
this longer
portion to the
top
Figure 6. Card Retainer Bracket
6.5 Replace the cover over the electronics cage. Insert and tighten the mounting screws to
secure the cover in place (see Figure 2).
GE Analytical Instruments, Inc. ©2005H
Page 5 of 6
DIN 71123 Rev. A
BORON, ANALOG BOARD, REPL. INST.
6.6 Place the analyzer into operation.
6.6.1
Unclip the ESD wrist strap from the ground stud and remove the strap.
6.6.2
Close and latch the analyzer door.
6.6.3
Open the valve(s) to restore the flow of sample fluid into the analyzer from all source
water inlet lines.
6.6.4
Turn on power to the analyzer by toggling the On/Off switch on the side of the
analyzer to the I position.
6.7 Place the removed board in the packaging that contained the replacement. Seal the
packaging and attach the return shipping label. Mark the label with the Return Authorization
Number (RA#) that GE Analytical Instruments provided when the replacement board was
ordered. Ship the board to GE Analytical Instruments.
GE Analytical Instruments, Inc. ©2005H
Page 6 of 6
DIN 71123 Rev. A
BORON, ANALOG BOARD, REPL. INST.