KERN FTB Service Manual

Also see for FTB: Operating instructions Operating instructions

Contents

KERN FTB Service Manual Manual pdf 43 page image

44 FTx/ITx-SH-e-0720against the wall of the housing.• Attach both plugs with connectors to the charging PCB and slide the PCB back it into the guide.• Replace the RS connector plate and secure with the screws.Note for scales with IP65 protection: Check that the seal of the connector plate is still correctly fastened to the housing. Ifit is not, the seal must be replaced as follows: Remove the existing seal from the housing so as to leave no trace. Clean anddegrease the surface to which it was fastened. Carefully affix the new seal to the housing in exactly the right position.• Check the connections of all cables: The cables must lie in the correct slots of the housing, to ensure they are not pinchedby the bottom plate.• Replace the bottom plate and the adjustable feet.5.5 Replacing the charging PCBNote: This procedure is only required for scales with a built-in battery (“AccuPac” version). Before fitting the new chargingPCB, check that the correct AC adapter for “AccuPac” operation is used (see spare parts lists in Chapters 2 and 3). If not,the AC adapter must also be replaced.• Undo the screws holding the RS connector plate in place (rear panel of scale) and remove the plate.• Slide the PCB out from the guide and remove both plugs on the PCB (connection cable to battery or analog PCB).• Attach both plugs with connectors to the (new) charging PCB and slide it into the guide.• Replace the RS connector plate and secure with the screws.Note for scales with IP65 protection: Check that the seal of the connector plate is still correctly fastened to the housing. Ifit is not, the seal must be replaced as follows: Remove the existing seal from the housing so as to leave no trace. Clean anddegrease the surface to which it was fastened. Carefully affix the new seal to the housing in exactly the right position.5.6 Replacing the analog PCB• Unscrew the adjustable feet and remove them. Undo the bottom plate retaining screws, removing them and the plate itself.• Disconnect weighing cell cable, connecting cable to the digital PCB and the AC adapter output cable from the analog PCB.• Pull off the two spring clips from the analog PCB and remove it.• Fit the new analog PCB and fix it in place with the spring clips.• Connect the weighing cell cable, the A/D cable from the digital PCB and the AC adapter output cable to the analog PCB.• Replace the bottom plate and the adjustable feet.Caution: After replacing the analog PCB all scale data must be entered again in technician mode (Chapter 7), plus allsupervisor mode settings must be re-entered! The scale must first be calibrated and a linearization and recalibration carried outas required.