RPM SCA-774 Single Channel Analyzer Board Replacement

Last Updated: 04/24/2025 1:44 AM

The following table lists all the components that make up the document.

Title	Type	Status	Last Updated
Rapiscan VM-250 Vehicle Monitor	Device	Published	10/14/2024 9:50 AM
Rapiscan PM-700 Pedestrian Monitor	Device	Published	06/20/2024 11:38 AM
Rapiscan TM-850 Rail Monitor	Device	Published	09/18/2024 10:28 AM
Rapiscan CM-267 Conveyor Monitor	Device	Published	06/27/2024 1:02 PM
7478 - 1401 - Establish Initial Conditions; Remark:	Procedure Step	Published	09/01/2023 7:48 PM
1401 - Establish Initial Conditions	Instruction	Published	09/30/2022 3:14 PM
7823 - 7592 - Inform system operators; Remark:	Procedure Step	Published	07/07/2023 10:54 PM
7592 - Inform system operators	Instruction	Published	06/29/2023 3:20 PM
7824 - 7676 - Brief system operators on expected work, duration, anticipated alarms, and fa...; Remark:7677	Procedure Step	Published	07/07/2023 10:55 PM
7676 - Brief system operators on expected work, duration, anticipated alarms, and fa...	Instruction	Published	07/01/2023 11:39 PM
7677 - Operators should expect numerous fault indications and alarms during procedur...	Remark	Published	07/02/2023 3:05 AM
7825 - 7594 - Close lane and set up barriers to establish a safety watch; Remark:7595	Procedure Step	Published	07/07/2023 10:57 PM
7678 - Warning : Traffic should temporarily be rerouted or halted during conduction of this pr...	Annotation	Published	07/03/2023 10:23 AM
7594 - Close lane and set up barriers to establish a safety watch	Instruction	Published	06/29/2023 3:28 PM
7595 - Use orange safety (traffic control) cones or equivalent per site-specific saf...	Remark	Published	06/29/2023 3:33 PM
7270 - 7235 - Power off RPM; Remark:7236	Procedure Step	Published	09/01/2023 7:57 PM
7235 - Power off RPM	Instruction	Published	04/24/2023 12:30 PM
7236 - Move LD-260 switch to OFF position. The PWR ON	Remark	Published	04/27/2023 4:25 PM
7827 - 7791 - Remove SCA-774 Board; Remark:	Procedure Step	Published	07/07/2023 10:59 PM
7791 - Remove SCA-774 Board	Instruction	Published	07/07/2023 2:14 PM
7828 - 7793 - Disconnect only signal (BNC) cables from SCA-775 module; Remark:7794	Procedure Step	Published	07/07/2023 11:00 PM
7792 - Note : It is good engineering practice to ensure all cables and connectors are label...	Annotation	Published	07/07/2023 2:17 PM
7793 - Disconnect only signal (BNC) cables from SCA-775 module	Instruction	Published	07/07/2023 2:18 PM
7794 - Remove Signal BNC Cables	Remark	Published	07/07/2023 2:22 PM
7829 - 7796 - Loosen screws in each corner (4) using medium Philips screwdriver and open SC...; Remark:7797	Procedure Step	Published	07/07/2023 11:02 PM
7795 - Caution : If you rotate cover of the SCA-775 down without first pulling out from the bo...	Annotation	Published	07/07/2023 2:23 PM
7796 - Loosen screws in each corner (4) using medium Philips screwdriver and open SC...	Instruction	Published	07/07/2023 2:24 PM
7797 - Normally the cover screws are captured and should not come out of cover. ...	Remark	Published	07/07/2023 2:34 PM
9467 - To prevent breaking the hinge on the module / door, once the retainer screws ...	Remark	Published	10/03/2023 3:32 PM
7830 - 7799 - Disconnect 4 wiring harness assembly/connectors (J6, J8, J10, J11) from SCA-7...; Remark:7800	Procedure Step	Published	07/07/2023 11:04 PM
7798 - Caution : Never remove connectors by pulling on wires.	Annotation	Published	07/07/2023 5:41 PM
7799 - Disconnect 4 wiring harness assembly/connectors (J6, J8, J10, J11) from SCA-7...	Instruction	Published	07/07/2023 5:44 PM
7800 - J8 and J11 should be labeled; write J6 and J10 on the appropriate connector i...	Remark	Published	07/07/2023 9:27 PM
7831 - 7801 - Remove 4 screws at corners of board; Remark:7802	Procedure Step	Published	07/07/2023 11:05 PM
7801 - Remove 4 screws at corners of board	Instruction	Published	07/07/2023 9:28 PM
7802 - Do not lose the screws. They are re-used to secure the SCA-774 board.	Remark	Published	07/07/2023 9:31 PM
7832 - 7803 - Remove board from SCA-775 module; Remark:7804	Procedure Step	Published	07/07/2023 11:06 PM
7803 - Remove board from SCA-775 module	Instruction	Published	07/07/2023 9:32 PM
7804 - BNC connectors are attached to the SCA-774 board and easily slide down then o...	Remark	Published	07/07/2023 9:34 PM
3397 - 3395 - Label faulty component; Remark:3396	Procedure Step	Published	07/21/2024 6:59 AM
3395 - Label faulty component	Instruction	Published	08/07/2021 11:07 AM
3396 - Use tag or tape. Include date of removal, description of failure symptoms, co...	Remark	Published	08/09/2021 11:35 AM
7833 - 7805 - Install New SCA-774; Remark:	Procedure Step	Published	07/07/2023 11:06 PM
7805 - Install New SCA-774	Instruction	Published	07/07/2023 9:35 PM
7834 - 7806 - Install new SCA-774 board; Remark:7807	Procedure Step	Published	07/07/2023 11:07 PM
7806 - Install new SCA-774 board	Instruction	Published	07/07/2023 9:36 PM
7807 - Use screws previously removed.	Remark	Published	07/07/2023 9:38 PM
7835 - 7809 - Reconnect 4 wiring harness assembly/connectors (J6, J8, J10, J11) from SCA-77...; Remark:7810	Procedure Step	Published	10/11/2023 7:37 PM
7808 - Caution : Proper connection of wiring harnesses is critical.	Annotation	Published	07/07/2023 9:39 PM
7809 - Reconnect 4 wiring harness assembly/connectors (J6, J8, J10, J11) from SCA-77...	Instruction	Published	07/07/2023 9:42 PM
7810 - Ensure all pins are engaged. It is easy to install the connectors one pin off...	Remark	Published	07/07/2023 9:44 PM
7836 - 7813 - Reconnect BNC connectors on top of SCA-775 module; Remark:	Procedure Step	Published	07/07/2023 11:42 PM
7811 - Caution : Proper connection of cables is critical.	Annotation	Published	07/07/2023 9:48 PM
7813 - Reconnect BNC connectors on top of SCA-775 module	Instruction	Published	07/07/2023 9:49 PM
7837 - 7814 - Close SCA-775 module cover and tighten 4 screws; Remark:7815	Procedure Step	Published	07/07/2023 11:09 PM
7814 - Close SCA-775 module cover and tighten 4 screws	Instruction	Published	07/07/2023 9:50 PM
7815 - If the follow-on alignment and functional compliance test procedures are to b...	Remark	Published	07/07/2023 9:52 PM
7280 - 7250 - Power on RPM; Remark:7251	Procedure Step	Published	04/27/2023 4:14 PM
7250 - Power on RPM	Instruction	Published	05/01/2023 8:31 AM
7251 - Move LD-260 switch to ON position. The LED PWR ON	Remark	Published	05/10/2023 3:14 PM
7281 - 7252 - Verify RPM start-up; Remark:7253	Procedure Step	Published	04/20/2025 3:26 PM
7252 - Verify RPM start-up	Instruction	Published	04/27/2023 2:23 PM
7253 - RPM will perform a power on self-test (POST) and collect a background radiati...	Remark	Published	05/10/2023 3:14 PM
7279 - 7249 - Return equipment to normal operating condition; Remark:	Procedure Step	Published	04/27/2023 4:13 PM
7249 - Return equipment to normal operating condition	Instruction	Published	04/08/2025 3:22 PM
7840 - 7816 - Perform electronic alignment; Remark:7817	Procedure Step	Published	07/07/2023 11:12 PM
7816 - Perform electronic alignment	Instruction	Published	07/07/2023 9:55 PM
7817 - DET-RPM-RAP-CM01, RPM Electronic Alignment Procedure.	Remark	Published	04/13/2025 5:55 PM
7842 - 7820 - Inform system operators upon completion of maintenance action; Remark:	Procedure Step	Published	07/07/2023 11:15 PM
7820 - Inform system operators upon completion of maintenance action	Instruction	Published	07/07/2023 10:02 PM
322 - 321 - Document maintenance actions; Remark:	Procedure Step	Published	06/17/2021 9:49 AM
321 - Document maintenance actions	Instruction	Published	04/21/2025 11:19 AM
2869 - 2585 - Document maintenance performed; Remark:2866	Procedure Step	Published	06/18/2021 5:58 PM
2585 - Document maintenance performed	Instruction	Published	07/09/2021 12:15 PM
2866 - Record observations, times, and results for the maintenance report.	Remark	Published	04/21/2025 11:39 AM
4706 - 4705 - Submit report; Remark:4864	Procedure Step	Published	06/29/2022 9:50 AM
4705 - Submit report	Instruction	Published	06/29/2022 9:50 AM
4864 - As specified by management or contractual obligations.	Remark	Published	07/28/2022 1:36 PM
Corrective Maintenance Procedure	Document Type	Published	03/02/2020 3:32 PM
Upon SCA-774 board failure	Frequency	Published	07/07/2023 11:22 PM
Warning	Annotation Type	Published	03/02/2020 3:25 PM
Note	Annotation Type	Published	03/02/2020 3:25 PM
Caution	Annotation Type	Published	03/02/2020 3:24 PM
Technician 2	Skill Level	Published	04/09/2020 1:17 AM
Keys to access RPM	Replacement Parts	Published	04/27/2023 6:56 PM
Reflective safety vest if required	Replacement Parts	Published	06/20/2023 4:47 PM
safety glasses	Replacement Parts	Published	07/02/2023 4:48 PM
Ladder; 2 meters, 6 feet tall; non-conducting if required	Replacement Parts	Published	07/02/2023 4:48 PM
Traffic control cones or equivalent if required	Replacement Parts	Published	06/20/2023 4:47 PM
Phillips screwdriver, small	Replacement Parts	Published	07/07/2023 11:39 PM
Phillips screwdriver, medium	Replacement Parts	Published	07/07/2023 11:39 PM
LD-260 Disconnect Switch Power Off	Image	Published	04/24/2023 12:49 PM
Disconnect Signal BNC Cables	Image	Published	07/07/2023 2:20 PM
Remove Six (6) Cover Screws	Image	Published	07/07/2023 2:27 PM
Cover screws are captured	Image	Published	10/04/2023 3:01 PM
To prevent breaking the hinge	Image	Published	10/04/2023 3:02 PM
SCA-774 Screws at Corner	Image	Published	07/07/2023 9:30 PM
LD-260 Disconnect Switch Power On	Image	Published	05/04/2023 3:37 PM

DET-RPM-RAP-CM07

Replace SCA-774 Single Channel Analyzer (SCA) board.

Equipment Hierarchy

Rapiscan VM-250 Vehicle Monitor

Rapiscan PM-700 Pedestrian Monitor

Rapiscan TM-850 Rail Monitor

Rapiscan CM-267 Conveyor Monitor

Frequency

Upon SCA-774 board failure

Technician Level

Technik 2

x 1

Duration

Length of time

Tools Required

Keys to access RPM

Reflective safety vest if required

safety glasses

Ladder; 2 meters, 6 feet tall; non-conducting if required

Traffic control cones or equivalent if required

Phillips screwdriver, small

Phillips screwdriver, medium

Materials Required

SCA-774 Single Channel Analyzer board (TSA Part #8754)

Vehicle and Pedestrian Monitor VM-250AGN/PM-700AGN Operations & Service Manual

NSDD Functional Compliance Datasheet

Originators

David Alexander

Brian Tucker

Craig Stinson

Bailey Toon

Originating Organization

PNNL

Approver

Jamie Hughes

Safety Concerns

Electrical

Final Documentation

Corrective Maintenance Report

Departmental Coordination

Coordinate access with system operators

Date of Origin

2016-09-08

Version

0.00

Príprava

Step 1

Main Step

7478 - 1401 - Establish Initial Conditions; Remark:

Step 00

1401 - Establish Initial Conditions

Establish Initial Conditions

7823 - 7592 - Inform system operators; Remark:

Step 00

7592 - Inform system operators

Inform system operators

7824 - 7676 - Brief system operators on expected work, duration, anticipated alarms, and fa...; Remark:7677

Step 00

7676 - Brief system operators on expected work, duration, anticipated alarms, and fa...

Brief system operators on expected work, duration, anticipated alarms, and fault indications before starting work

7677 - Operators should expect numerous fault indications and alarms during procedur...

Operators should expect numerous fault indications and alarms during procedure.

7825 - 7594 - Close lane and set up barriers to establish a safety watch; Remark:7595

7678 - Warning : Traffic should temporarily be rerouted or halted during conduction of this pr...

Type

Warning

Traffic should temporarily be rerouted or halted during conduction of this procedure to ensure maintenance provider safety and prevent unscreened conveyances from passing.

Step 00

7594 - Close lane and set up barriers to establish a safety watch

Close lane and set up barriers to establish a safety watch

7595 - Use orange safety (traffic control) cones or equivalent per site-specific saf...

Use orange safety (traffic control) cones or equivalent per site-specific safety practices.

7270 - 7235 - Power off RPM; Remark:7236

Step 00

7236 - Move LD-260 switch to OFF position. The PWR ON

Move LD-260 switch to OFF position. The PWR ON LED will turn off.

Prevádzka

Step 2

Main Step

7827 - 7791 - Remove SCA-774 Board; Remark:

Step 00

7828 - 7793 - Disconnect only signal (BNC) cables from SCA-775 module; Remark:7794

7792 - Note : It is good engineering practice to ensure all cables and connectors are label...

Type

Note

It is good engineering practice to ensure all cables and connectors are labeled before disconnecting them.

Step 00

7793 - Disconnect only signal (BNC) cables from SCA-775 module

Disconnect only signal (BNC) cables from SCA-775 module

7794 - Remove Signal BNC Cables

7829 - 7796 - Loosen screws in each corner (4) using medium Philips screwdriver and open SC...; Remark:7797

7795 - Caution : If you rotate cover of the SCA-775 down without first pulling out from the bo...

Type

Caution

If you rotate cover of the SCA-775 down without first pulling out from the box, the hinge will break.

Step 00

7796 - Loosen screws in each corner (4) using medium Philips screwdriver and open SC...

Loosen screws in each corner (4) using medium Philips screwdriver and open SCA-775 module

7797 - Normally the cover screws are captured and should not come out of cover. ...

Normally the cover screws are captured and should not come out of cover.

9467 - To prevent breaking the hinge on the module / door, once the retainer screws ...

To prevent breaking the hinge on the module / door, once the retainer screws are loosened, take care to gently pull the bottom of the cover away from the module approximately ¼ʺ before letting the door open.

7830 - 7799 - Disconnect 4 wiring harness assembly/connectors (J6, J8, J10, J11) from SCA-7...; Remark:7800

7798 - Caution : Never remove connectors by pulling on wires.

Type

Caution

Never remove connectors by pulling on wires.

7792 - Note : It is good engineering practice to ensure all cables and connectors are label...

Type

Note

It is good engineering practice to ensure all cables and connectors are labeled before disconnecting them.

Step 00

7799 - Disconnect 4 wiring harness assembly/connectors (J6, J8, J10, J11) from SCA-7...

Disconnect 4 wiring harness assembly/connectors (J6, J8, J10, J11) from SCA-774 board

7800 - J8 and J11 should be labeled; write J6 and J10 on the appropriate connector i...

J8 and J11 should be labeled; write J6 and J10 on the appropriate connector in permanent marker.

J8 and J11 should be easily removed by grasping the connector and pulling it out with a gentle rocking motion.

J10 is locked in place by the position of J6; remove J6 first.

7831 - 7801 - Remove 4 screws at corners of board; Remark:7802

Step 00

7801 - Remove 4 screws at corners of board

Remove 4 screws at corners of board

7802 - Do not lose the screws. They are re-used to secure the SCA-774 board.

Do not lose the screws. They are re-used to secure the SCA-774 board.

7832 - 7803 - Remove board from SCA-775 module; Remark:7804

Step 00

7803 - Remove board from SCA-775 module

Remove board from SCA-775 module

7804 - BNC connectors are attached to the SCA-774 board and easily slide down then o...

BNC connectors are attached to the SCA-774 board and easily slide down then out of the SCA-775 box.

3397 - 3395 - Označte chybný komponent; Remark:3396

Step 00

3395 - Označte chybný komponent

Označte chybný komponent

3396 - Použite štítok alebo pásku. Uveďte dátum odstránenia, opis príznakov zlyhania, k...

Použite štítok alebo pásku. Uveďte dátum odstránenia, opis príznakov zlyhania, krajinu, miesto a číslo/počet jazdných pruhov. Majte k dispozícii časti príručky alebo zmluvné požiadavky NSDD.

Prevádzka

Step 3

Main Step