Mettler Toledo PS6L Spezifikationen Seite 52

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Chapter 5 : Service and Repair
5-3 (08/04)
When disconnected from the scale, the voltage on the power supply should be close to
9 VDC. If the voltage on the universal power supply does not read within the range of 8.5
VDC to 9.5 VDC, replace the wall transformer.
Alternate Method: Check to see if scale can be energized by USB connection.
o Disconnect power supply from AC outlet. Disconnect RS232 cable from the
scale.
o Re-connect scale by USB method to PC. Plug small end of USB cable (USB B
connector) to the scale and large end (USB A connector) into a PC. A direct
connection to the PC is required. Do not use an USB hub.
o If scale display is energized with the USB cable connected than the power
supply or power supply connector is bad.
Blank Display
Scale is not receiving power or the display cable is not attached to the scale base
properly.
For RS232, confirm power supply is plugged into working AC outlet and power
supply is plugged properly into scale base.
If using USB, make sure USB cable is pushed in all the way at both the scale and the
PC.
If you have verified that the scale is receiving power, and you still have nothing on
the display, then check the display cable at the connectors. Unplug display by
pushing in on the connector tab and pulling back on the cable. Reinsert the display
cable into the scale connector making sure the tab clicks into position.
If the blank display continues, replace the 0270 Display.
No Keypad Interaction
The UNITS key may be disabled in operation depending on the model or capacity and
increment size selected in the Build parameter in setup. For these models, the UNITS key
will still function in the set up mode. The I/O function for the zero key is disabled on
most models.
To test the operation of the keypad, remove power, then reapply. With power to the unit,
attempt to enter setup mode by pressing and holding the UNITS key (IE: 8-10 sec). If
the display does not indicate setup mode, replace the 0270 Display.
Indicator Locked
To test operation of the indicator, remove power, then reapply. With power to the unit
and display reading zero, add weight. If no change in weight is displayed, replace either
the load cell or the Logic PCB.
The I/O function on the keypad
is disabled in most models.
Cycle the power by unplugging
the scale from its power source.
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