90th day of attachment
I tried my best to repair the Terumo infusion pumps, STC-503 as they are with us since early june.
Firstly, before doing anything such as disassemble the pump, i took the service manual out to examine the fault which is having "Err 2" on the display. Actually, there are a lot of possibilities that caused this problem. The main problem is due to the malfunctioning of the HIC board as it consists of power supply circuit, motor rotation circuit and etc. Most of the controls is on the HIC board. Usually, we will just replaced the whole HIC boards. However, Terumo manufacturer no longer produce this model and the parts for it. Therefore, i just have to check and replace certain components on the board.
Secondly. after being guided through the troubleshooting flowchart, i found out that the connectors that are used to connect the two boards together seems to be faulty. There are still salvage HIC boards left to make sure whether they are still able to be used. I found out that one of them is still working but a fuse component is absent. I replaced the board with one of the pump and "Err 2" no longer displayed. Another problem arised for that pump which is unable to run on batteries due to absence of the fuse.
Thirdly, the another pump still displayed "Err 2" regardless of changing new HIC board. I using the DMM to test the continunity of the motor rotation circuit and no components from the circuit are not damaged. I replaced the fuse that was originally from the faulty board to the HIC board in the pump.
We returned most of the devices that are done for repair as the "returned" shelves no longer have any space for us to place those that we just repaired.
Firstly, before doing anything such as disassemble the pump, i took the service manual out to examine the fault which is having "Err 2" on the display. Actually, there are a lot of possibilities that caused this problem. The main problem is due to the malfunctioning of the HIC board as it consists of power supply circuit, motor rotation circuit and etc. Most of the controls is on the HIC board. Usually, we will just replaced the whole HIC boards. However, Terumo manufacturer no longer produce this model and the parts for it. Therefore, i just have to check and replace certain components on the board.
Secondly. after being guided through the troubleshooting flowchart, i found out that the connectors that are used to connect the two boards together seems to be faulty. There are still salvage HIC boards left to make sure whether they are still able to be used. I found out that one of them is still working but a fuse component is absent. I replaced the board with one of the pump and "Err 2" no longer displayed. Another problem arised for that pump which is unable to run on batteries due to absence of the fuse.
Thirdly, the another pump still displayed "Err 2" regardless of changing new HIC board. I using the DMM to test the continunity of the motor rotation circuit and no components from the circuit are not damaged. I replaced the fuse that was originally from the faulty board to the HIC board in the pump.
We returned most of the devices that are done for repair as the "returned" shelves no longer have any space for us to place those that we just repaired.
posted by Michelle Tham @ 9:36 AM
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