Replacement Of Pcba; Replacement Of Analogue Pcba; Replacement Of Display Pcba - KERN DE Service Manual

4 Replacement of PCBA

4.1 Replacement of analogue PCBA

1. Disassemble the stainless cover and the metal top housing from the platform.
2. Disconnect PL1 and PL2 from the analogue PCBA. Replace it by a new PCBA.
Connect PL1 and PL2 again. Assemble the ground wire with a screw.
3. Assemble the metal top housing and the stainless steel cover.
4. Perform an internal adjusting as described in section 1.
5. Check the accuracy of the balance at different weights.
DE6K2 DE15K5
weight +/- weight
(kg) (kg)
2.0 2g 5.0
4.0 2g 10.0
6.0 4g 15.0 10g
6. Check other functions, such as TARE, MEMORY and Auto-Off.

4.2 Replacement of display PCBA

1. Disassemble the bottom housing of the remote display box.
2. Disconnect PL3, PL4 and PL5 from the display PCBA. Replace it by a new PCBA.
Connect PL3, PL4 and PL5 again.
3. Assemble the bottom housing.
4. Perform an internal adjusting as described in section 1.
5. Check the accuracy of the balance at different weights as described in the previous
section.
6. Check other functions, such as TARE, MEMORY and Auto-Off.
8
DE30K10
+/- weight +/-
(kg)
5g 10.0 10g
5g 20.0 10g
30.0 20g
DE60K20 DE150K50
weight +/- weight
(kg) (kg)
20.0 20g 50.0
40.0 20g 100.0
60.0 40g 150.0 100g
DE300K100
+/- weight (kg) +/-
50g 100.0 100g
50g 200.0 100g
300.0 200g
DE-SH-e-0111