Service manual

1. Disconnect the platform measuring voltage lines from the terminal strip

(pins 3 and 4) in the A/D converter. Then short circuit these two lines and

connect them to pin 7 (GND) of the terminal connector. If the A/D converter is

intact, the weight readout should be stable.

Disconnect the cable from the platform.

2. Connect the strain-gauge simulator and turn the switch to simulate different

input signals. The weight readout should be stable.

Replacing the Digital PCB

Note: If communcation problems occur during communication with connected devices

(such as a printer), check the cable connections and the data transfer parameters

first; if the error source is not found, start the internal test program.

– Turn off the indicator.

– Press and hold the k key and turn the indicator on again. The test program

starts.

In case of defect, replace the digital PCB.

Some Combics indicators are equipped with D-Sub 25 female connectors, and

some with cable glands; make sure you order the correct PCB for your indicator

(see the illustration on the left).

– After replacing the digital PCB, use the PPLoader program to load the

application software, if necessary.

– Afterwards, enter the model designation and the Serial number of the complete

Combics scale (see pages 63 and 65).

haupt_pg.jpg

haupt_25.jpg