ATS alarm showed train EB applied at track circuit N647 due to EB command/status mismatch. TC report ed TIMS showed EB applied due to obstacle detected at car 35 53. TC operated ODCS and reset EB - ok. Train proceeded in A ~~~~~ Check and found #3553 obstacle detector wire having fluctuating resistance (52-120ohm).
Further check B/S obstacle cable causing fluctuating resistance due to jack knife connection of the cable lugs being loose. Further check on ODR ok.
Further check control panel 24v, satis.
No fire control panel test power FC observed.
Serviced cable lugs and reconnected the wire via the jack knife connection. Resealed wire sleeve, security check ok.
Check resistance, able to hold steady at 51.3ohm when obstacle detector wires were shaken.
Done by Arthur/Jun Hong. 03/02/22.