Salter Brecknell 7821 - Manual (Page 23)

Model 7821 Bench Scale User’s Manual 23
Spare Parts List
Description Part Number
Keyboard Panel 1163-15803
Display PCB 7405-15465
Loadcell (100kg) 7154-16335-100
Main PCB 7405-14704-2
Power Supply 1148-15536
RS-232 Cable 1140-13842
1. Verify that the weigh platter is on the scale.
2. Press the ZERO key.
3. Power down, then power up the scale.
4. Recalibrate the scale.
1. Remove all weight from the scale.
2. Press the ZERO key.
3. Power down, then power up the scale.
4. Recalibrate the scale.
1. Check cable connection at both the rear of
the scale and the host device.
2. Check communication setting and baud rate
on both scale and host device.
3. Perform I/O loopback test.
4. Replace main PCB.
1. Replace display panel.
2. Replace display PCB.
3. Replace main PCB.
Display shows center
“ – – – – ” dashes
(indicates the scale is
outside zero capacity of
±2%).
Display shows upper
“ – – – – ” dashes
(indicates the scale is
over capacity).
Scale is not
transmitting data to the
host device
The ZERO key and TEST
key do not function.