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CSL Part Number: 86773
Product Overview: The TST 290-0873-B00 with 290-0874-B00 is a dual-board relay control assembly used in transportation safety applications. It operates on 12VDC and manages multiple 40-amp automotive relays with SPDT configurations to control high-current loads. The board features protective circuitry including 1N4007 diodes, mini blade fuses rated at 20A and 30A, and electrolytic capacitors for power conditioning. Common applications include Touch Tek Generation II systems and other safety-critical transportation equipment requiring reliable relay switching and load management.
Category: Control Board
Manufacturer: Transportation Safety Technologies
Manufacturer Part Number: 290-0873-B00 with 290-0874-B00
Common Failures
Frequent issues with this product include defective components such as burnt resistors, shorted diodes, open fuses, and missing or damaged relays. Signs of overheating and burnt traces on the circuit board have also been observed. These defects often result in malfunctions like intermittent relay operation and failed electrical connections.
Repair Approach
Repairs typically involve replacing burnt or defective resistors, diodes, fuses, and relays. Preventative replacement of electrolytic capacitors may be recommended to improve reliability. Additionally, technicians address any visible damage by repairing burnt traces and ensuring all connections are secure.
Testing & Quality
Following repairs, components undergo testing including power-up tests and verification of LED function. Relays are tested individually outside of the circuit to ensure they operate correctly. Testing is performed at the module or unit level based on available test capability.
Service and repair your broken Transportation Safety Technologies part
We can repair your Transportation Safety Technologies model 290-0873-B00 with 290-0874-B00 in our facility. Let our skilled technicians get your Transportation Safety Technologies back in operation quickly.
Step 1 - Click the green 'Repair Now' button above to add the part and then complete the RMA.
Step 2 - The RMA form will be sent to you via email. Print the RMA form and put it in a box with the item(s) for repair.
Step 3 - Ship or mail the box to the address listed on the RMA.
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