User Manual

6 Appendix
766 IC Sample Processor
118
Required Instruments:
Only required, if the RS232 or remote interface is to be checked:
• 3.496.8550 Test plug (on the "Remote" plug)
• 3.496.8480 Test plug (on the "RS 232" plug)
6.4.2 Preparing the instrument
• Disconnect power plug.
• Remove cables to the "RS232" and "Remote" interfaces.
• Plug in power plug and immediately press <9> and keep it de-
pressed until the start test pattern disappears.
• Alternatively, the <RESET> key can be pressed to cause a reset
followed by pressing (within 0.4 sec) and holding down the <9> key
to open the diagnosis menu.
Switch on and
9
LIFT
or
RESET
CLEAR
and
9
LIFT
Main menu Diagnosis:
diagnosis
>RAM initialization
Open the submenu with <ENTER>
diagnosis
>RAM test
Use <
é
> or <
ê
> to access one menu
item up or down
diagnosis
>display test
Use <HOME> or <END> to access first
or last menu item
diagnosis
>display contrast test
<QUIT> returns to the normal state
diagnosis
>key test
diagnosis
>remote test
diagnosis
>RS232 test
diagnosis
>external bus test
diagnosis
>beeper test
diagnosis
>rack code test
diagnosis
>function test
diagnosis
>instrument number
diagnosis
>power on reset
The "function test" is a Metrohm internal test which should be run only
by service personal. Before starting this test, the needle must always
be removed from the needle holder, otherwise it would be damaged.