The Advanced
®
3D3/4D3 Service Manual
51
6. At “Set Stir Amplitude”, press STOP to
return to “Osmometer (or Cryoscope)
Ready”.
Note: Stir wire movement should be stable.
If movement has erratic amplitude,
driver transistor Q2B may need
replacement. Use an oscilloscope at
J9-1 to verify the presence of a clean,
square wave (see Stir Driver Noise
procedure).
Display/Printer Test
1. Turn on the instrument. If there is a
Supervisor/Operator keyswitch, turn it to
the Supervisor position (if required).
2. Press TEST. Press < or > to select
“Display/Printer Test”, and then press
START twice.
A continuous string of characters and
numbers should scroll across the display,
and a single string of the same characters
and numbers will be sent to the printer.
If not, check your connections and try
again. If you continue to have a problem
and the instrument is working otherwise,
the printer or display may need to be
replaced (see Replacement Instructions
for additional information).
3. Press STOP twice to end the test and exit
the Test menu.
Beeper Test
1. Turn on the instrument. If there is a
Supervisor/Operator keyswitch, turn it to
the Supervisor position (if required).
2. Press TEST. Press < or > to select
“Beeper Test”, and then press START
and < to activate the continuous internal
beeper.
If you do not hear the beeper and the
instrument is working otherwise, the
application board may need to be replaced
(see Replacement Instructions for addi-
tional information).
3. Press STOP twice to end the test and exit
the Test menu.
Keypad Test
1. Turn on the instrument. If there is a
Supervisor/Operator keyswitch, turn it to
the Supervisor position (if required).
2. Press TEST. Press < or > to select
“Keypad Test”, and then press START to
activate the keypad test. Each key
pressed should respond on the display
with the key name, and activate the corre-
sponding LED, if present.
If any keys or LEDs do not respond,
check the narness connections and repeat
the test. Otherwise, the keypad or appli-
cation board may need to be replaced (see
Replacement Instructions for additional
information).
3. Press STOP twice to end the test, and
STOP again to exit the Test menu.
Barcode Test
(Only Intel instruments with a barcode con-
nector.)
1. Turn on the instrument.
2. Press TEST. Press < or > to select
“Barcode Test”, and then press START
to activate the barcode test. Using the
attached scanner, begin scanning bar-
codes. Each scan should display on the
instrument.
If the barcode does not display, check the
connections. Try resetting the scanner to
To Next Page
Loading...
