View single post by slychiu
 Posted: Tuesday Jan 3rd, 2023 01:05 pm
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Joined: Saturday Apr 29th, 2006
Location: Singapore
Posts: 5507

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The ucm with programming cable should be able to upgrade the firmware. Make sure the cable with 4 way and 2 way connectors are on the ucm and the 6 way connector is connected to pp1 on the comfort. They're is no pp2 on the new comfort pcb. In your photo you do not show the connections to the programming cable

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