Broadcast & Communications Engineering and Maintenance Services
Repair of International Tower Lighting ITL-4740 Timing and Trigger Board Out of Flash Technology PC310-4 Strobe Controller and Power Supply Unit – October 9, 2021
This failed International Tower Lighting ITL-4740 Emulation Timing & Trigger Board was part of the reason the top strobe on a client’s tower had stopped working recently. I got the strobe working again after temporarily replacing the failed ITL-4740 board and the burst resistor in the client’s Flash Technology PC310-4 Controller / Power Supply unit with a loaner Flash Tech board from one of my spare/emergency PC310-4i units and replacing the burst resistor with a new one.
Inspection and Troubleshooting Findings
Performing the Repairs On The ITL-4740 Board
Time To Test the Repaired ITL-4740 Timing and Trigger Board Under Actual Working Conditions
The following video shows the board performing flawlessly in my spare/emergency Flash Technology PC310-4i controller/power supply unit. Both day and night modes are functioning as they should, with correct strobe intensity and flash rate. The flashes of the strobe in medium intensity (day mode) are a bit hard to see in the video because the flashes are so fast and so bright that the video camera has a hard time capturing them — they are much easier to catch on video in the low intensity/night mode.
Cost of the repair (not including my labor) was around $7.00 in parts, which sure beats having to purchase a new board. I certainly have nothing against the purchase and installation of new boards for clients, but why toss out a board which I can repair for the client (labor included) for roughly 20% of the cost of a new board? ITL offers repairs on the boards, but that would also have incurred shipping costs and going to the trouble of packaging the board for shipping. In this case, it made more sense to just repair it here in the lab.