Manual FLOW 38 Page 42 (total 54) COMAC CAL s.r.o.
Disassembly and assembly of PCB
Power supply and terminal board PCB
Recommendations
Before replacing the power supply PCB due to its malfunction, we recommend you to check the
instrument fuse and replace it if necessary (page 22).
Warning:
- Risk of electric shock
- Before removing the rear cover (cap) for the electronics, make sure that the power is off
1. Unscrew the rear cover of the meter's housing.
2. Disconnect the connected cables and if necessary,
take them out of the cable entries.
3. Unscrew the four screws holding the power supply
cover sheet along with the PCB.
4. Pull the power supply PCB, including the cover
sheet a little out and disconnect the flat cable
connector carefully.
5. Pull the power supply PCB out of the electronics
cover and replace it with a good one, possibly use
the PCB with another version of the power supply.
6. Connect the flat cable connector and insert the PCB
in the electronics cover in proper orientation.
7. Using four screws, fix the PCB with cover sheet to
the evaluation unit box.
8. Reconnect the cables and screw in the instrument
housing cap.
Display PCB – replacement
1. Unscrew the front cover with the glass window.
2. Unscrew four fixing bolts.
3. Remove the original electronic board including the
plastic cover and disconnect carefully the flat cable
connector and the button connector.
4. Disconnect the sensor conductors from terminals.
5. Connect the sensor conductors to the terminals of the
new board.
6. Reconnect the button connectors and flat cable
connector.
7. Turn the electronic PCB with display to the required
position (3x ± 90° maximum).
8. Screw in the four fixing screws.
Make sure that the screws are tightened properly!!!
9. Screw in the front cover with the window.
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